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From lowlands to highlands: searching for elevational patterns of species richness and distribution of scarab beetles in Costa Rica

Identifieur interne : 000C79 ( Istex/Corpus ); précédent : 000C78; suivant : 000C80

From lowlands to highlands: searching for elevational patterns of species richness and distribution of scarab beetles in Costa Rica

Auteurs : Alejandra García-L Pez ; Estefanía Mic ; Eduardo Galante

Source :

RBID : ISTEX:3E4FAA19B431D9B973350E8523E84D5D8333C913

English descriptors

Abstract

Aim  Understanding the heterogeneous distribution of species on mountains is an important aim in ecology. Altitudinal gradients have enormous potential for improving our knowledge of trends in biodiversity and conservation. In this study, we investigated the variation in scarab beetle diversity (Dynastinae, Rutelinae and Melolonthinae) along an elevational tropical forest gradient.

Url:
DOI: 10.1111/j.1472-4642.2011.00846.x

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ISTEX:3E4FAA19B431D9B973350E8523E84D5D8333C913

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<p>Methods  Ultraviolet light traps placed in six forests situated from 100 to 1510 m were used. Changes in species composition and richness among elevations were investigated. Differences in the altitudinal patterns using different groups of species were examined: the whole assemblage, each separate subfamily and two different trophic habits (phytophagous or saproxylic). The effects of temperature, humidity and elevation on scarab distribution were tested using canonical correspondence analyses. The relationship between the community similarity of the studied forests and the altitudinal distance among them was also analysed.</p>
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<p>Results  Species composition and richness changed along the gradient. The peak in species richness varied depending on the species group considered and in all cases occurred 500 or 800 m. Forests at these altitudes were also the richest in exclusive species. Species composition turnover among elevations appeared with a clear separation between lowland and highland fauna. The latter was lower in richness but also had exclusive species. Temperature, humidity and altitude affected species distribution, with altitude being the most important factor for all the subfamilies studied.</p>
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<b>Table S1</b>
Scarab beetles species collected in the forest elevational gradient in Costa Rica.</p>
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<b>Appendix S1</b>
Public collections and open access databases where the specimens of scarab beetles were deposited and referenced.</p>
<p>As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer‐reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.</p>
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<b>Aim </b>
Understanding the heterogeneous distribution of species on mountains is an important aim in ecology. Altitudinal gradients have enormous potential for improving our knowledge of trends in biodiversity and conservation. In this study, we investigated the variation in scarab beetle diversity (Dynastinae, Rutelinae and Melolonthinae) along an elevational tropical forest gradient.</p>
<p>
<b>Location </b>
The Atlantic slope of the Guanacaste mountain range in Costa Rica.</p>
<p>
<b>Methods </b>
Ultraviolet light traps placed in six forests situated from 100 to 1510 m were used. Changes in species composition and richness among elevations were investigated. Differences in the altitudinal patterns using different groups of species were examined: the whole assemblage, each separate subfamily and two different trophic habits (phytophagous or saproxylic). The effects of temperature, humidity and elevation on scarab distribution were tested using canonical correspondence analyses. The relationship between the community similarity of the studied forests and the altitudinal distance among them was also analysed.</p>
<p>
<b>Results </b>
Species composition and richness changed along the gradient. The peak in species richness varied depending on the species group considered and in all cases occurred 500 or 800 m. Forests at these altitudes were also the richest in exclusive species. Species composition turnover among elevations appeared with a clear separation between lowland and highland fauna. The latter was lower in richness but also had exclusive species. Temperature, humidity and altitude affected species distribution, with altitude being the most important factor for all the subfamilies studied.</p>
<p>
<b>Main conclusions </b>
Our results showed that species distribution fits a hump‐shaped pattern. The peak of this pattern varied depending on the taxonomic group and mountain analysed, highlighting the importance of evolutionary processes as species distribution drivers. The fact that species richness peaked at elevations where human impact is currently important underlines the value of the development of conservation strategies for these areas.</p>
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<dateIssued encoding="w3cdtf">2012-06</dateIssued>
<copyrightDate encoding="w3cdtf">2012</copyrightDate>
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<languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
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<abstract>Aim  Understanding the heterogeneous distribution of species on mountains is an important aim in ecology. Altitudinal gradients have enormous potential for improving our knowledge of trends in biodiversity and conservation. In this study, we investigated the variation in scarab beetle diversity (Dynastinae, Rutelinae and Melolonthinae) along an elevational tropical forest gradient.</abstract>
<abstract>Location  The Atlantic slope of the Guanacaste mountain range in Costa Rica.</abstract>
<abstract>Methods  Ultraviolet light traps placed in six forests situated from 100 to 1510 m were used. Changes in species composition and richness among elevations were investigated. Differences in the altitudinal patterns using different groups of species were examined: the whole assemblage, each separate subfamily and two different trophic habits (phytophagous or saproxylic). The effects of temperature, humidity and elevation on scarab distribution were tested using canonical correspondence analyses. The relationship between the community similarity of the studied forests and the altitudinal distance among them was also analysed.</abstract>
<abstract>Results  Species composition and richness changed along the gradient. The peak in species richness varied depending on the species group considered and in all cases occurred 500 or 800 m. Forests at these altitudes were also the richest in exclusive species. Species composition turnover among elevations appeared with a clear separation between lowland and highland fauna. The latter was lower in richness but also had exclusive species. Temperature, humidity and altitude affected species distribution, with altitude being the most important factor for all the subfamilies studied.</abstract>
<abstract>Main conclusions  Our results showed that species distribution fits a hump‐shaped pattern. The peak of this pattern varied depending on the taxonomic group and mountain analysed, highlighting the importance of evolutionary processes as species distribution drivers. The fact that species richness peaked at elevations where human impact is currently important underlines the value of the development of conservation strategies for these areas.</abstract>
<subject lang="en">
<genre>keywords</genre>
<topic>Altitude</topic>
<topic>diversity</topic>
<topic>humidity</topic>
<topic>light traps</topic>
<topic>temperature</topic>
<topic>tropical forests</topic>
</subject>
<relatedItem type="host">
<titleInfo>
<title>Diversity and Distributions</title>
</titleInfo>
<genre type="journal">journal</genre>
<note type="content"> Table S1 Scarab beetles species collected in the forest elevational gradient in Costa Rica. Appendix S1 Public collections and open access databases where the specimens of scarab beetles were deposited and referenced. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer‐reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Table S1 Scarab beetles species collected in the forest elevational gradient in Costa Rica. Appendix S1 Public collections and open access databases where the specimens of scarab beetles were deposited and referenced. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer‐reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Table S1 Scarab beetles species collected in the forest elevational gradient in Costa Rica. Appendix S1 Public collections and open access databases where the specimens of scarab beetles were deposited and referenced. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer‐reviewed and may be re‐organized for online delivery, but are not copy‐edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors.Supporting Info Item: Supporting info item - Supporting info item - </note>
<subject>
<genre>article-category</genre>
<topic>BIODIVERSITY RESEARCH</topic>
</subject>
<identifier type="ISSN">1366-9516</identifier>
<identifier type="eISSN">1472-4642</identifier>
<identifier type="DOI">10.1111/(ISSN)1472-4642</identifier>
<identifier type="PublisherID">DDI</identifier>
<part>
<date>2012</date>
<detail type="volume">
<caption>vol.</caption>
<number>18</number>
</detail>
<detail type="issue">
<caption>no.</caption>
<number>6</number>
</detail>
<extent unit="pages">
<start>543</start>
<end>553</end>
<total>11</total>
</extent>
</part>
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<identifier type="istex">3E4FAA19B431D9B973350E8523E84D5D8333C913</identifier>
<identifier type="DOI">10.1111/j.1472-4642.2011.00846.x</identifier>
<identifier type="ArticleID">DDI846</identifier>
<accessCondition type="use and reproduction" contentType="copyright">© 2011 Blackwell Publishing Ltd</accessCondition>
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