Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns
Identifieur interne : 001961 ( PascalFrancis/Corpus ); précédent : 001960; suivant : 001962Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns
Auteurs : Luz Boyero ; Richard G. Pearson ; David Dudgeon ; Manuel A. S. Graca ; Mark O. Gessner ; Ricardo J. Albarino ; Ver Nica Ferreira ; Catherine M. Yule ; Andrew J. Boulton ; Muthukumarasamy Arunachalam ; Marcos Calusto ; Eric Chauvet ; Alonso Ramirez ; Julián Chara ; Marcelo S. Moretti ; José F. Goncalves ; Julie E. Helson ; Ana M. Chara-Serna ; Andrea C. Encalada ; Judy N. Davies ; Sylvain Lamothe ; Aydeè Cornejo ; Aggie O. Y. Li ; Leonardo M. Buria ; Ver Nica D. Villanueva ; María C. Zuniga ; Catherine M. PringleSource :
- Ecology : (Durham) [ 0012-9658 ] ; 2011.
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English descriptors
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Abstract
Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expected latitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming.
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Format Inist (serveur)
| NO : | PASCAL 11-0410306 INIST |
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| ET : | Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns |
| AU : | BOYERO (Luz); PEARSON (Richard G.); DUDGEON (David); GRACA (Manuel A. S.); GESSNER (Mark O.); ALBARINO (Ricardo J.); FERREIRA (Verónica); YULE (Catherine M.); BOULTON (Andrew J.); ARUNACHALAM (Muthukumarasamy); CALUSTO (Marcos); CHAUVET (Eric); RAMIREZ (Alonso); CHARA (Julián); MORETTI (Marcelo S.); GONCALVES (José F.); HELSON (Julie E.); CHARA-SERNA (Ana M.); ENCALADA (Andrea C.); DAVIES (Judy N.); LAMOTHE (Sylvain); CORNEJO (Aydeè); LI (Aggie O. Y.); BURIA (Leonardo M.); VILLANUEVA (Verónica D.); ZUNIGA (María C.); PRINGLE (Catherine M.) |
| AF : | Wetland Ecology Department, Doñana Biological Station-CSIC, Avda Americo Vespucio sn/n/41092 Sevilla/Espagne (1 aut.); School of Marine and Tropical Biology, James Cook University, Townsville/Queensland 4811/Australie (1 aut., 2 aut.); School of Biological Sciences, The University of Hong Kong/Hong-Kong (3 aut., 23 aut.); IMAR-CMA and Department Life Sciences, University of Coimbra/3001 401 Coimbra/Portugal (4 aut., 7 aut., 19 aut.); Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133/8600 Dübendorf/Suisse (5 aut.); Institute of Integrative Biology (IBZ), ETH Zurich/8092 Zurich/Suisse (5 aut.); Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET/Bariloche/Argentine (6 aut., 24 aut., 25 aut.); School of Science, Monash University, Jalan Lagoon Selatan, Bandar Sunway/46150, Selangor/Malaisie (8 aut.); Ecosystem Management, School of Environmental and Rural Science, University of New England/Armidale, NSW 2350/Australie (9 aut., 20 aut.); Sri Paramakalyani Centre for Environmental Sciences, Manonmainam Sundaranar University/Alwarkuruchi, Tamil Nadu/Inde (10 aut.); Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970/Belo Horizonte MG/Brésil (11 aut., 15 aut., 16 aut.); Université de Toulouse, INP, UPS, EcoLab (Laboratoire Écologie Fonctionnelle et Environnement), 118 Route de Narbonne/31062 Toulouse/France (12 aut., 21 aut.); CNRS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), 118 Route de Narbonne/31062 Toulouse/France (12 aut., 21 aut.); Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 70377, San Juan/Puerto Rico 00936/Etats-Unis (13 aut.); Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62/Cali/Colombie (14 aut., 18 aut., 26 aut.); Centro de Investigaciones y Estudios en Biodiversidad y Recursos Genéticos, CIEBREG, POB 97/Pereira/Colombie (14 aut.); Surface and Groundwater Ecology Research Group, Department of Biological Sciences, University of Toronto at Scarborough, 1265 Military Trail/Toronto, Ontario M1C 1A4/Canada (17 aut.); Departamento de Biologia, Grupo de Investigaciones Entomológicas, Universidad del Valle, Apartado Aéreo 25360/Cali/Colombie (18 aut.); Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, P.O. Box 171200841/Quito/Equateur (19 aut.); Sección de Entomologia, Instituto Conmemorativo Gorgas de Estudios de la Salud, Avenida Justo Arosemena y Calle 35, 0816 02593, Panama City/Panama (22 aut.); Programa Centroamericano de Maestria en Entomologia, Universidad de Panamá, Panama City/Panama (22 aut.); Odum School of Ecology, The University of Georgia/Athens, Georgia 30602-2602/Etats-Unis (27 aut.) |
| DT : | Publication en série; Compte-rendu; Niveau analytique |
| SO : | Ecology : (Durham); ISSN 0012-9658; Coden ECGYAQ; Etats-Unis; Da. 2011; Vol. 92; No. 9; Pp. 1839-1848; Bibl. 1 p. |
| LA : | Anglais |
| EA : | Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expected latitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming. |
| CC : | 002A14B01; 002A14B04C |
| FD : | Guilde; Latitude; Diversité; Répartition spatiale; Gradient latitudinal; Litière; Phytophage; Détritivore; Cours eau; Ecosystème |
| ED : | Guild; Latitude; Diversity; Spatial distribution; Latitudinal gradient; Litter; Phytophagous; Detritivorous; Stream; Ecosystem |
| SD : | Latitud; Diversidad; Distribución espacial; Gradiente latitudinal; Hojarasca; Fitófago; Detritivoro; Curso agua; Ecosistema |
| LO : | INIST-3018.354000191189840150 |
| ID : | 11-0410306 |
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Pascal:11-0410306Le document en format XML
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Box 70377, San Juan</s1><s2>Puerto Rico 00936</s2><s3>USA</s3><sZ>13 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Chara, Julian" sort="Chara, Julian" uniqKey="Chara J" first="Julián" last="Chara">Julián Chara</name><affiliation><inist:fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="16"><s1>Centro de Investigaciones y Estudios en Biodiversidad y Recursos Genéticos, CIEBREG, POB 97</s1><s2>Pereira</s2><s3>COL</s3><sZ>14 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Moretti, Marcelo S" sort="Moretti, Marcelo S" uniqKey="Moretti M" first="Marcelo S." last="Moretti">Marcelo S. Moretti</name><affiliation><inist:fA14 i1="11"><s1>Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970</s1><s2>Belo Horizonte MG</s2><s3>BRA</s3><sZ>11 aut.</sZ><sZ>15 aut.</sZ><sZ>16 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Goncalves, Jose F" sort="Goncalves, Jose F" uniqKey="Goncalves J" first="José F." last="Goncalves">José F. Goncalves</name><affiliation><inist:fA14 i1="11"><s1>Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970</s1><s2>Belo Horizonte MG</s2><s3>BRA</s3><sZ>11 aut.</sZ><sZ>15 aut.</sZ><sZ>16 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Helson, Julie E" sort="Helson, Julie E" uniqKey="Helson J" first="Julie E." last="Helson">Julie E. Helson</name><affiliation><inist:fA14 i1="17"><s1>Surface and Groundwater Ecology Research Group, Department of Biological Sciences, University of Toronto at Scarborough, 1265 Military Trail</s1><s2>Toronto, Ontario M1C 1A4</s2><s3>CAN</s3><sZ>17 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Chara Serna, Ana M" sort="Chara Serna, Ana M" uniqKey="Chara Serna A" first="Ana M." last="Chara-Serna">Ana M. Chara-Serna</name><affiliation><inist:fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="18"><s1>Departamento de Biologia, Grupo de Investigaciones Entomológicas, Universidad del Valle, Apartado Aéreo 25360</s1><s2>Cali</s2><s3>COL</s3><sZ>18 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Encalada, Andrea C" sort="Encalada, Andrea C" uniqKey="Encalada A" first="Andrea C." last="Encalada">Andrea C. Encalada</name><affiliation><inist:fA14 i1="04"><s1>IMAR-CMA and Department Life Sciences, University of Coimbra</s1><s2>3001 401 Coimbra</s2><s3>PRT</s3><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>19 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="19"><s1>Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, P.O. Box 171200841</s1><s2>Quito</s2><s3>ECU</s3><sZ>19 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Davies, Judy N" sort="Davies, Judy N" uniqKey="Davies J" first="Judy N." last="Davies">Judy N. Davies</name><affiliation><inist:fA14 i1="09"><s1>Ecosystem Management, School of Environmental and Rural Science, University of New England</s1><s2>Armidale, NSW 2350</s2><s3>AUS</s3><sZ>9 aut.</sZ><sZ>20 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Lamothe, Sylvain" sort="Lamothe, Sylvain" uniqKey="Lamothe S" first="Sylvain" last="Lamothe">Sylvain Lamothe</name><affiliation><inist:fA14 i1="12"><s1>Université de Toulouse, INP, UPS, EcoLab (Laboratoire Écologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="13"><s1>CNRS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Cornejo, Aydee" sort="Cornejo, Aydee" uniqKey="Cornejo A" first="Aydeè" last="Cornejo">Aydeè Cornejo</name><affiliation><inist:fA14 i1="20"><s1>Sección de Entomologia, Instituto Conmemorativo Gorgas de Estudios de la Salud, Avenida Justo Arosemena y Calle 35, 0816 02593, Panama City</s1><s3>PAN</s3><sZ>22 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="21"><s1>Programa Centroamericano de Maestria en Entomologia, Universidad de Panamá, Panama City</s1><s3>PAN</s3><sZ>22 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Li, Aggie O Y" sort="Li, Aggie O Y" uniqKey="Li A" first="Aggie O. Y." last="Li">Aggie O. Y. Li</name><affiliation><inist:fA14 i1="03"><s1>School of Biological Sciences, The University of Hong Kong</s1><s3>HKG</s3><sZ>3 aut.</sZ><sZ>23 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Buria, Leonardo M" sort="Buria, Leonardo M" uniqKey="Buria L" first="Leonardo M." last="Buria">Leonardo M. Buria</name><affiliation><inist:fA14 i1="07"><s1>Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET</s1><s2>Bariloche</s2><s3>ARG</s3><sZ>6 aut.</sZ><sZ>24 aut.</sZ><sZ>25 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Villanueva, Ver Nica D" sort="Villanueva, Ver Nica D" uniqKey="Villanueva V" first="Ver Nica D." last="Villanueva">Ver Nica D. Villanueva</name><affiliation><inist:fA14 i1="07"><s1>Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET</s1><s2>Bariloche</s2><s3>ARG</s3><sZ>6 aut.</sZ><sZ>24 aut.</sZ><sZ>25 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Zuniga, Maria C" sort="Zuniga, Maria C" uniqKey="Zuniga M" first="María C." last="Zuniga">María C. Zuniga</name><affiliation><inist:fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Pringle, Catherine M" sort="Pringle, Catherine M" uniqKey="Pringle C" first="Catherine M." last="Pringle">Catherine M. Pringle</name><affiliation><inist:fA14 i1="22"><s1>Odum School of Ecology, The University of Georgia</s1><s2>Athens, Georgia 30602-2602</s2><s3>USA</s3><sZ>27 aut.</sZ></inist:fA14></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">11-0410306</idno><date when="2011">2011</date><idno type="stanalyst">PASCAL 11-0410306 INIST</idno><idno type="RBID">Pascal:11-0410306</idno><idno type="wicri:Area/PascalFrancis/Corpus">001961</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns</title><author><name sortKey="Boyero, Luz" sort="Boyero, Luz" uniqKey="Boyero L" first="Luz" last="Boyero">Luz Boyero</name><affiliation><inist:fA14 i1="01"><s1>Wetland Ecology Department, Doñana Biological Station-CSIC, Avda Americo Vespucio sn/n</s1><s2>41092 Sevilla</s2><s3>ESP</s3><sZ>1 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="02"><s1>School of Marine and Tropical Biology, James Cook University, Townsville</s1><s2>Queensland 4811</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Pearson, Richard G" sort="Pearson, Richard G" uniqKey="Pearson R" first="Richard G." last="Pearson">Richard G. Pearson</name><affiliation><inist:fA14 i1="02"><s1>School of Marine and Tropical Biology, James Cook University, Townsville</s1><s2>Queensland 4811</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Dudgeon, David" sort="Dudgeon, David" uniqKey="Dudgeon D" first="David" last="Dudgeon">David Dudgeon</name><affiliation><inist:fA14 i1="03"><s1>School of Biological Sciences, The University of Hong Kong</s1><s3>HKG</s3><sZ>3 aut.</sZ><sZ>23 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Graca, Manuel A S" sort="Graca, Manuel A S" uniqKey="Graca M" first="Manuel A. S." last="Graca">Manuel A. S. Graca</name><affiliation><inist:fA14 i1="04"><s1>IMAR-CMA and Department Life Sciences, University of Coimbra</s1><s2>3001 401 Coimbra</s2><s3>PRT</s3><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>19 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Gessner, Mark O" sort="Gessner, Mark O" uniqKey="Gessner M" first="Mark O." last="Gessner">Mark O. Gessner</name><affiliation><inist:fA14 i1="05"><s1>Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133</s1><s2>8600 Dübendorf</s2><s3>CHE</s3><sZ>5 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="06"><s1>Institute of Integrative Biology (IBZ), ETH Zurich</s1><s2>8092 Zurich</s2><s3>CHE</s3><sZ>5 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Albarino, Ricardo J" sort="Albarino, Ricardo J" uniqKey="Albarino R" first="Ricardo J." last="Albarino">Ricardo J. Albarino</name><affiliation><inist:fA14 i1="07"><s1>Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET</s1><s2>Bariloche</s2><s3>ARG</s3><sZ>6 aut.</sZ><sZ>24 aut.</sZ><sZ>25 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Ferreira, Ver Nica" sort="Ferreira, Ver Nica" uniqKey="Ferreira V" first="Ver Nica" last="Ferreira">Ver Nica Ferreira</name><affiliation><inist:fA14 i1="04"><s1>IMAR-CMA and Department Life Sciences, University of Coimbra</s1><s2>3001 401 Coimbra</s2><s3>PRT</s3><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>19 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Yule, Catherine M" sort="Yule, Catherine M" uniqKey="Yule C" first="Catherine M." last="Yule">Catherine M. Yule</name><affiliation><inist:fA14 i1="08"><s1>School of Science, Monash University, Jalan Lagoon Selatan, Bandar Sunway</s1><s2>46150, Selangor</s2><s3>MYS</s3><sZ>8 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Boulton, Andrew J" sort="Boulton, Andrew J" uniqKey="Boulton A" first="Andrew J." last="Boulton">Andrew J. Boulton</name><affiliation><inist:fA14 i1="09"><s1>Ecosystem Management, School of Environmental and Rural Science, University of New England</s1><s2>Armidale, NSW 2350</s2><s3>AUS</s3><sZ>9 aut.</sZ><sZ>20 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Arunachalam, Muthukumarasamy" sort="Arunachalam, Muthukumarasamy" uniqKey="Arunachalam M" first="Muthukumarasamy" last="Arunachalam">Muthukumarasamy Arunachalam</name><affiliation><inist:fA14 i1="10"><s1>Sri Paramakalyani Centre for Environmental Sciences, Manonmainam Sundaranar University</s1><s2>Alwarkuruchi, Tamil Nadu</s2><s3>IND</s3><sZ>10 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Calusto, Marcos" sort="Calusto, Marcos" uniqKey="Calusto M" first="Marcos" last="Calusto">Marcos Calusto</name><affiliation><inist:fA14 i1="11"><s1>Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970</s1><s2>Belo Horizonte MG</s2><s3>BRA</s3><sZ>11 aut.</sZ><sZ>15 aut.</sZ><sZ>16 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Chauvet, Eric" sort="Chauvet, Eric" uniqKey="Chauvet E" first="Eric" last="Chauvet">Eric Chauvet</name><affiliation><inist:fA14 i1="12"><s1>Université de Toulouse, INP, UPS, EcoLab (Laboratoire Écologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="13"><s1>CNRS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Ramirez, Alonso" sort="Ramirez, Alonso" uniqKey="Ramirez A" first="Alonso" last="Ramirez">Alonso Ramirez</name><affiliation><inist:fA14 i1="14"><s1>Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 70377, San Juan</s1><s2>Puerto Rico 00936</s2><s3>USA</s3><sZ>13 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Chara, Julian" sort="Chara, Julian" uniqKey="Chara J" first="Julián" last="Chara">Julián Chara</name><affiliation><inist:fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="16"><s1>Centro de Investigaciones y Estudios en Biodiversidad y Recursos Genéticos, CIEBREG, POB 97</s1><s2>Pereira</s2><s3>COL</s3><sZ>14 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Moretti, Marcelo S" sort="Moretti, Marcelo S" uniqKey="Moretti M" first="Marcelo S." last="Moretti">Marcelo S. Moretti</name><affiliation><inist:fA14 i1="11"><s1>Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970</s1><s2>Belo Horizonte MG</s2><s3>BRA</s3><sZ>11 aut.</sZ><sZ>15 aut.</sZ><sZ>16 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Goncalves, Jose F" sort="Goncalves, Jose F" uniqKey="Goncalves J" first="José F." last="Goncalves">José F. Goncalves</name><affiliation><inist:fA14 i1="11"><s1>Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970</s1><s2>Belo Horizonte MG</s2><s3>BRA</s3><sZ>11 aut.</sZ><sZ>15 aut.</sZ><sZ>16 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Helson, Julie E" sort="Helson, Julie E" uniqKey="Helson J" first="Julie E." last="Helson">Julie E. Helson</name><affiliation><inist:fA14 i1="17"><s1>Surface and Groundwater Ecology Research Group, Department of Biological Sciences, University of Toronto at Scarborough, 1265 Military Trail</s1><s2>Toronto, Ontario M1C 1A4</s2><s3>CAN</s3><sZ>17 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Chara Serna, Ana M" sort="Chara Serna, Ana M" uniqKey="Chara Serna A" first="Ana M." last="Chara-Serna">Ana M. Chara-Serna</name><affiliation><inist:fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="18"><s1>Departamento de Biologia, Grupo de Investigaciones Entomológicas, Universidad del Valle, Apartado Aéreo 25360</s1><s2>Cali</s2><s3>COL</s3><sZ>18 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Encalada, Andrea C" sort="Encalada, Andrea C" uniqKey="Encalada A" first="Andrea C." last="Encalada">Andrea C. Encalada</name><affiliation><inist:fA14 i1="04"><s1>IMAR-CMA and Department Life Sciences, University of Coimbra</s1><s2>3001 401 Coimbra</s2><s3>PRT</s3><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>19 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="19"><s1>Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, P.O. Box 171200841</s1><s2>Quito</s2><s3>ECU</s3><sZ>19 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Davies, Judy N" sort="Davies, Judy N" uniqKey="Davies J" first="Judy N." last="Davies">Judy N. Davies</name><affiliation><inist:fA14 i1="09"><s1>Ecosystem Management, School of Environmental and Rural Science, University of New England</s1><s2>Armidale, NSW 2350</s2><s3>AUS</s3><sZ>9 aut.</sZ><sZ>20 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Lamothe, Sylvain" sort="Lamothe, Sylvain" uniqKey="Lamothe S" first="Sylvain" last="Lamothe">Sylvain Lamothe</name><affiliation><inist:fA14 i1="12"><s1>Université de Toulouse, INP, UPS, EcoLab (Laboratoire Écologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="13"><s1>CNRS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Cornejo, Aydee" sort="Cornejo, Aydee" uniqKey="Cornejo A" first="Aydeè" last="Cornejo">Aydeè Cornejo</name><affiliation><inist:fA14 i1="20"><s1>Sección de Entomologia, Instituto Conmemorativo Gorgas de Estudios de la Salud, Avenida Justo Arosemena y Calle 35, 0816 02593, Panama City</s1><s3>PAN</s3><sZ>22 aut.</sZ></inist:fA14></affiliation><affiliation><inist:fA14 i1="21"><s1>Programa Centroamericano de Maestria en Entomologia, Universidad de Panamá, Panama City</s1><s3>PAN</s3><sZ>22 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Li, Aggie O Y" sort="Li, Aggie O Y" uniqKey="Li A" first="Aggie O. Y." last="Li">Aggie O. Y. Li</name><affiliation><inist:fA14 i1="03"><s1>School of Biological Sciences, The University of Hong Kong</s1><s3>HKG</s3><sZ>3 aut.</sZ><sZ>23 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Buria, Leonardo M" sort="Buria, Leonardo M" uniqKey="Buria L" first="Leonardo M." last="Buria">Leonardo M. Buria</name><affiliation><inist:fA14 i1="07"><s1>Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET</s1><s2>Bariloche</s2><s3>ARG</s3><sZ>6 aut.</sZ><sZ>24 aut.</sZ><sZ>25 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Villanueva, Ver Nica D" sort="Villanueva, Ver Nica D" uniqKey="Villanueva V" first="Ver Nica D." last="Villanueva">Ver Nica D. Villanueva</name><affiliation><inist:fA14 i1="07"><s1>Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET</s1><s2>Bariloche</s2><s3>ARG</s3><sZ>6 aut.</sZ><sZ>24 aut.</sZ><sZ>25 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Zuniga, Maria C" sort="Zuniga, Maria C" uniqKey="Zuniga M" first="María C." last="Zuniga">María C. Zuniga</name><affiliation><inist:fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></inist:fA14></affiliation></author><author><name sortKey="Pringle, Catherine M" sort="Pringle, Catherine M" uniqKey="Pringle C" first="Catherine M." last="Pringle">Catherine M. Pringle</name><affiliation><inist:fA14 i1="22"><s1>Odum School of Ecology, The University of Georgia</s1><s2>Athens, Georgia 30602-2602</s2><s3>USA</s3><sZ>27 aut.</sZ></inist:fA14></affiliation></author></analytic><series><title level="j" type="main">Ecology : (Durham)</title><title level="j" type="abbreviated">Ecology : (Durh.)</title><idno type="ISSN">0012-9658</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Ecology : (Durham)</title><title level="j" type="abbreviated">Ecology : (Durh.)</title><idno type="ISSN">0012-9658</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Detritivorous</term><term>Diversity</term><term>Ecosystem</term><term>Guild</term><term>Latitude</term><term>Latitudinal gradient</term><term>Litter</term><term>Phytophagous</term><term>Spatial distribution</term><term>Stream</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Guilde</term><term>Latitude</term><term>Diversité</term><term>Répartition spatiale</term><term>Gradient latitudinal</term><term>Litière</term><term>Phytophage</term><term>Détritivore</term><term>Cours eau</term><term>Ecosystème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expected latitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0012-9658</s0></fA01><fA02 i1="01"><s0>ECGYAQ</s0></fA02><fA03 i2="1"><s0>Ecology : (Durh.)</s0></fA03><fA05><s2>92</s2></fA05><fA06><s2>9</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns</s1></fA08><fA11 i1="01" i2="1"><s1>BOYERO (Luz)</s1></fA11><fA11 i1="02" i2="1"><s1>PEARSON (Richard G.)</s1></fA11><fA11 i1="03" i2="1"><s1>DUDGEON (David)</s1></fA11><fA11 i1="04" i2="1"><s1>GRACA (Manuel A. S.)</s1></fA11><fA11 i1="05" i2="1"><s1>GESSNER (Mark O.)</s1></fA11><fA11 i1="06" i2="1"><s1>ALBARINO (Ricardo J.)</s1></fA11><fA11 i1="07" i2="1"><s1>FERREIRA (Verónica)</s1></fA11><fA11 i1="08" i2="1"><s1>YULE (Catherine M.)</s1></fA11><fA11 i1="09" i2="1"><s1>BOULTON (Andrew J.)</s1></fA11><fA11 i1="10" i2="1"><s1>ARUNACHALAM (Muthukumarasamy)</s1></fA11><fA11 i1="11" i2="1"><s1>CALUSTO (Marcos)</s1></fA11><fA11 i1="12" i2="1"><s1>CHAUVET (Eric)</s1></fA11><fA11 i1="13" i2="1"><s1>RAMIREZ (Alonso)</s1></fA11><fA11 i1="14" i2="1"><s1>CHARA (Julián)</s1></fA11><fA11 i1="15" i2="1"><s1>MORETTI (Marcelo S.)</s1></fA11><fA11 i1="16" i2="1"><s1>GONCALVES (José F.)</s1></fA11><fA11 i1="17" i2="1"><s1>HELSON (Julie E.)</s1></fA11><fA11 i1="18" i2="1"><s1>CHARA-SERNA (Ana M.)</s1></fA11><fA11 i1="19" i2="1"><s1>ENCALADA (Andrea C.)</s1></fA11><fA11 i1="20" i2="1"><s1>DAVIES (Judy N.)</s1></fA11><fA11 i1="21" i2="1"><s1>LAMOTHE (Sylvain)</s1></fA11><fA11 i1="22" i2="1"><s1>CORNEJO (Aydeè)</s1></fA11><fA11 i1="23" i2="1"><s1>LI (Aggie O. Y.)</s1></fA11><fA11 i1="24" i2="1"><s1>BURIA (Leonardo M.)</s1></fA11><fA11 i1="25" i2="1"><s1>VILLANUEVA (Verónica D.)</s1></fA11><fA11 i1="26" i2="1"><s1>ZUNIGA (María C.)</s1></fA11><fA11 i1="27" i2="1"><s1>PRINGLE (Catherine M.)</s1></fA11><fA14 i1="01"><s1>Wetland Ecology Department, Doñana Biological Station-CSIC, Avda Americo Vespucio sn/n</s1><s2>41092 Sevilla</s2><s3>ESP</s3><sZ>1 aut.</sZ></fA14><fA14 i1="02"><s1>School of Marine and Tropical Biology, James Cook University, Townsville</s1><s2>Queensland 4811</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></fA14><fA14 i1="03"><s1>School of Biological Sciences, The University of Hong Kong</s1><s3>HKG</s3><sZ>3 aut.</sZ><sZ>23 aut.</sZ></fA14><fA14 i1="04"><s1>IMAR-CMA and Department Life Sciences, University of Coimbra</s1><s2>3001 401 Coimbra</s2><s3>PRT</s3><sZ>4 aut.</sZ><sZ>7 aut.</sZ><sZ>19 aut.</sZ></fA14><fA14 i1="05"><s1>Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133</s1><s2>8600 Dübendorf</s2><s3>CHE</s3><sZ>5 aut.</sZ></fA14><fA14 i1="06"><s1>Institute of Integrative Biology (IBZ), ETH Zurich</s1><s2>8092 Zurich</s2><s3>CHE</s3><sZ>5 aut.</sZ></fA14><fA14 i1="07"><s1>Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET</s1><s2>Bariloche</s2><s3>ARG</s3><sZ>6 aut.</sZ><sZ>24 aut.</sZ><sZ>25 aut.</sZ></fA14><fA14 i1="08"><s1>School of Science, Monash University, Jalan Lagoon Selatan, Bandar Sunway</s1><s2>46150, Selangor</s2><s3>MYS</s3><sZ>8 aut.</sZ></fA14><fA14 i1="09"><s1>Ecosystem Management, School of Environmental and Rural Science, University of New England</s1><s2>Armidale, NSW 2350</s2><s3>AUS</s3><sZ>9 aut.</sZ><sZ>20 aut.</sZ></fA14><fA14 i1="10"><s1>Sri Paramakalyani Centre for Environmental Sciences, Manonmainam Sundaranar University</s1><s2>Alwarkuruchi, Tamil Nadu</s2><s3>IND</s3><sZ>10 aut.</sZ></fA14><fA14 i1="11"><s1>Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970</s1><s2>Belo Horizonte MG</s2><s3>BRA</s3><sZ>11 aut.</sZ><sZ>15 aut.</sZ><sZ>16 aut.</sZ></fA14><fA14 i1="12"><s1>Université de Toulouse, INP, UPS, EcoLab (Laboratoire Écologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></fA14><fA14 i1="13"><s1>CNRS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), 118 Route de Narbonne</s1><s2>31062 Toulouse</s2><s3>FRA</s3><sZ>12 aut.</sZ><sZ>21 aut.</sZ></fA14><fA14 i1="14"><s1>Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 70377, San Juan</s1><s2>Puerto Rico 00936</s2><s3>USA</s3><sZ>13 aut.</sZ></fA14><fA14 i1="15"><s1>Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62</s1><s2>Cali</s2><s3>COL</s3><sZ>14 aut.</sZ><sZ>18 aut.</sZ><sZ>26 aut.</sZ></fA14><fA14 i1="16"><s1>Centro de Investigaciones y Estudios en Biodiversidad y Recursos Genéticos, CIEBREG, POB 97</s1><s2>Pereira</s2><s3>COL</s3><sZ>14 aut.</sZ></fA14><fA14 i1="17"><s1>Surface and Groundwater Ecology Research Group, Department of Biological Sciences, University of Toronto at Scarborough, 1265 Military Trail</s1><s2>Toronto, Ontario M1C 1A4</s2><s3>CAN</s3><sZ>17 aut.</sZ></fA14><fA14 i1="18"><s1>Departamento de Biologia, Grupo de Investigaciones Entomológicas, Universidad del Valle, Apartado Aéreo 25360</s1><s2>Cali</s2><s3>COL</s3><sZ>18 aut.</sZ></fA14><fA14 i1="19"><s1>Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, P.O. Box 171200841</s1><s2>Quito</s2><s3>ECU</s3><sZ>19 aut.</sZ></fA14><fA14 i1="20"><s1>Sección de Entomologia, Instituto Conmemorativo Gorgas de Estudios de la Salud, Avenida Justo Arosemena y Calle 35, 0816 02593, Panama City</s1><s3>PAN</s3><sZ>22 aut.</sZ></fA14><fA14 i1="21"><s1>Programa Centroamericano de Maestria en Entomologia, Universidad de Panamá, Panama City</s1><s3>PAN</s3><sZ>22 aut.</sZ></fA14><fA14 i1="22"><s1>Odum School of Ecology, The University of Georgia</s1><s2>Athens, Georgia 30602-2602</s2><s3>USA</s3><sZ>27 aut.</sZ></fA14><fA20><s1>1839-1848</s1></fA20><fA21><s1>2011</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>3018</s2><s5>354000191189840150</s5></fA43><fA44><s0>0000</s0><s1>© 2011 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>1 p.</s0></fA45><fA47 i1="01" i2="1"><s0>11-0410306</s0></fA47><fA60><s1>P</s1><s3>C</s3></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Ecology : (Durham)</s0></fA64><fA66 i1="01"><s0>USA</s0></fA66><fC01 i1="01" l="ENG"><s0>Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expected latitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming.</s0></fC01><fC02 i1="01" i2="X"><s0>002A14B01</s0></fC02><fC02 i1="02" i2="X"><s0>002A14B04C</s0></fC02><fC03 i1="01" i2="X" l="FRE"><s0>Guilde</s0><s5>01</s5></fC03><fC03 i1="01" i2="X" l="ENG"><s0>Guild</s0><s5>01</s5></fC03><fC03 i1="02" i2="X" l="FRE"><s0>Latitude</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="ENG"><s0>Latitude</s0><s5>02</s5></fC03><fC03 i1="02" i2="X" l="SPA"><s0>Latitud</s0><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Diversité</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Diversity</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Diversidad</s0><s5>03</s5></fC03><fC03 i1="04" i2="X" l="FRE"><s0>Répartition spatiale</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="ENG"><s0>Spatial distribution</s0><s5>04</s5></fC03><fC03 i1="04" i2="X" l="SPA"><s0>Distribución espacial</s0><s5>04</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Gradient latitudinal</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Latitudinal gradient</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Gradiente latitudinal</s0><s5>05</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Litière</s0><s2>NT</s2><s5>06</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Litter</s0><s2>NT</s2><s5>06</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Hojarasca</s0><s2>NT</s2><s5>06</s5></fC03><fC03 i1="07" i2="X" l="FRE"><s0>Phytophage</s0><s5>07</s5></fC03><fC03 i1="07" i2="X" l="ENG"><s0>Phytophagous</s0><s5>07</s5></fC03><fC03 i1="07" i2="X" l="SPA"><s0>Fitófago</s0><s5>07</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Détritivore</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Detritivorous</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Detritivoro</s0><s5>08</s5></fC03><fC03 i1="09" i2="X" l="FRE"><s0>Cours eau</s0><s5>09</s5></fC03><fC03 i1="09" i2="X" l="ENG"><s0>Stream</s0><s5>09</s5></fC03><fC03 i1="09" i2="X" l="SPA"><s0>Curso agua</s0><s5>09</s5></fC03><fC03 i1="10" i2="X" l="FRE"><s0>Ecosystème</s0><s5>10</s5></fC03><fC03 i1="10" i2="X" l="ENG"><s0>Ecosystem</s0><s5>10</s5></fC03><fC03 i1="10" i2="X" l="SPA"><s0>Ecosistema</s0><s5>10</s5></fC03><fN21><s1>283</s1></fN21><fN44 i1="01"><s1>OTO</s1></fN44><fN82><s1>OTO</s1></fN82></pA></standard><server><NO>PASCAL 11-0410306 INIST</NO><ET>Global distribution of a key trophic guild contrasts with common latitudinal diversity patterns</ET><AU>BOYERO (Luz); PEARSON (Richard G.); DUDGEON (David); GRACA (Manuel A. S.); GESSNER (Mark O.); ALBARINO (Ricardo J.); FERREIRA (Verónica); YULE (Catherine M.); BOULTON (Andrew J.); ARUNACHALAM (Muthukumarasamy); CALUSTO (Marcos); CHAUVET (Eric); RAMIREZ (Alonso); CHARA (Julián); MORETTI (Marcelo S.); GONCALVES (José F.); HELSON (Julie E.); CHARA-SERNA (Ana M.); ENCALADA (Andrea C.); DAVIES (Judy N.); LAMOTHE (Sylvain); CORNEJO (Aydeè); LI (Aggie O. Y.); BURIA (Leonardo M.); VILLANUEVA (Verónica D.); ZUNIGA (María C.); PRINGLE (Catherine M.)</AU><AF>Wetland Ecology Department, Doñana Biological Station-CSIC, Avda Americo Vespucio sn/n/41092 Sevilla/Espagne (1 aut.); School of Marine and Tropical Biology, James Cook University, Townsville/Queensland 4811/Australie (1 aut., 2 aut.); School of Biological Sciences, The University of Hong Kong/Hong-Kong (3 aut., 23 aut.); IMAR-CMA and Department Life Sciences, University of Coimbra/3001 401 Coimbra/Portugal (4 aut., 7 aut., 19 aut.); Department of Aquatic Ecology, Eawag: Swiss Federal Institute of Aquatic Science and Technology, Überlandstrasse 133/8600 Dübendorf/Suisse (5 aut.); Institute of Integrative Biology (IBZ), ETH Zurich/8092 Zurich/Suisse (5 aut.); Laboratorio de Limnologia, INIBIOMA, Universidad Nacional del Comaltue-CONICET/Bariloche/Argentine (6 aut., 24 aut., 25 aut.); School of Science, Monash University, Jalan Lagoon Selatan, Bandar Sunway/46150, Selangor/Malaisie (8 aut.); Ecosystem Management, School of Environmental and Rural Science, University of New England/Armidale, NSW 2350/Australie (9 aut., 20 aut.); Sri Paramakalyani Centre for Environmental Sciences, Manonmainam Sundaranar University/Alwarkuruchi, Tamil Nadu/Inde (10 aut.); Laboratório de Ecologia de Bentos, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, CP 486, CEP 30.161-970/Belo Horizonte MG/Brésil (11 aut., 15 aut., 16 aut.); Université de Toulouse, INP, UPS, EcoLab (Laboratoire Écologie Fonctionnelle et Environnement), 118 Route de Narbonne/31062 Toulouse/France (12 aut., 21 aut.); CNRS, EcoLab (Laboratoire Ecologie Fonctionnelle et Environnement), 118 Route de Narbonne/31062 Toulouse/France (12 aut., 21 aut.); Institute for Tropical Ecosystem Studies, University of Puerto Rico, P.O. Box 70377, San Juan/Puerto Rico 00936/Etats-Unis (13 aut.); Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria, CIPAV, Carrera 25 No. 6-62/Cali/Colombie (14 aut., 18 aut., 26 aut.); Centro de Investigaciones y Estudios en Biodiversidad y Recursos Genéticos, CIEBREG, POB 97/Pereira/Colombie (14 aut.); Surface and Groundwater Ecology Research Group, Department of Biological Sciences, University of Toronto at Scarborough, 1265 Military Trail/Toronto, Ontario M1C 1A4/Canada (17 aut.); Departamento de Biologia, Grupo de Investigaciones Entomológicas, Universidad del Valle, Apartado Aéreo 25360/Cali/Colombie (18 aut.); Colegio de Ciencias Biológicas y Ambientales, Universidad San Francisco de Quito, Campus Cumbayá, P.O. Box 171200841/Quito/Equateur (19 aut.); Sección de Entomologia, Instituto Conmemorativo Gorgas de Estudios de la Salud, Avenida Justo Arosemena y Calle 35, 0816 02593, Panama City/Panama (22 aut.); Programa Centroamericano de Maestria en Entomologia, Universidad de Panamá, Panama City/Panama (22 aut.); Odum School of Ecology, The University of Georgia/Athens, Georgia 30602-2602/Etats-Unis (27 aut.)</AF><DT>Publication en série; Compte-rendu; Niveau analytique</DT><SO>Ecology : (Durham); ISSN 0012-9658; Coden ECGYAQ; Etats-Unis; Da. 2011; Vol. 92; No. 9; Pp. 1839-1848; Bibl. 1 p.</SO><LA>Anglais</LA><EA>Most hypotheses explaining the general gradient of higher diversity toward the equator are implicit or explicit about greater species packing in the tropics. However, global patterns of diversity within guilds, including trophic guilds (i.e., groups of organisms that use similar food resources), are poorly known. We explored global diversity patterns of a key trophic guild in stream ecosystems, the detritivore shredders. This was motivated by the fundamental ecological role of shredders as decomposers of leaf litter and by some records pointing to low shredder diversity and abundance in the tropics, which contrasts with diversity patterns of most major taxa for which broad-scale latitudinal patterns haven been examined. Given this evidence, we hypothesized that shredders are more abundant and diverse in temperate than in tropical streams, and that this pattern is related to the higher temperatures and lower availability of high-quality leaf litter in the tropics. Our comprehensive global survey (129 stream sites from 14 regions on six continents) corroborated the expected latitudinal pattern and showed that shredder distribution (abundance, diversity and assemblage composition) was explained by a combination of factors, including water temperature (some taxa were restricted to cool waters) and biogeography (some taxa were more diverse in particular biogeographic realms). In contrast to our hypothesis, shredder diversity was unrelated to leaf toughness, but it was inversely related to litter diversity. Our findings markedly contrast with global trends of diversity for most taxa, and with the general rule of higher consumer diversity at higher levels of resource diversity. Moreover, they highlight the emerging role of temperature in understanding global patterns of diversity, which is of great relevance in the face of projected global warming.</EA><CC>002A14B01; 002A14B04C</CC><FD>Guilde; Latitude; Diversité; Répartition spatiale; Gradient latitudinal; Litière; Phytophage; Détritivore; Cours eau; Ecosystème</FD><ED>Guild; Latitude; Diversity; Spatial distribution; Latitudinal gradient; Litter; Phytophagous; Detritivorous; Stream; Ecosystem</ED><SD>Latitud; Diversidad; Distribución espacial; Gradiente latitudinal; Hojarasca; Fitófago; Detritivoro; Curso agua; Ecosistema</SD><LO>INIST-3018.354000191189840150</LO><ID>11-0410306</ID></server></inist></record>Pour manipuler ce document sous Unix (Dilib)
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