Arbuscular mycorrhizal fungi associated with Populus-Salix stands in a semiarid riparian ecosystem.
Identifieur interne : 003302 ( Main/Curation ); précédent : 003301; suivant : 003303Arbuscular mycorrhizal fungi associated with Populus-Salix stands in a semiarid riparian ecosystem.
Auteurs : Vanessa B. Beauchamp [États-Unis] ; Juliet C. Stromberg ; Jean C. StutzSource :
- The New phytologist [ 0028-646X ] ; 2006.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Mycorhizes.
- isolement et purification : Mycorhizes.
- microbiologie : Populus, Racines de plante, Salix.
- Arizona, Climat, Géographie, Écosystème.
English descriptors
- KwdEn :
- MESH :
- geographic : Arizona.
- growth & development : Mycorrhizae.
- isolation & purification : Mycorrhizae.
- microbiology : Plant Roots, Populus, Salix.
- Climate, Ecosystem, Geography.
Abstract
This study examined the activity, species richness, and species composition of the arbuscular mycorrhizal fungal (AMF) community of Populus-Salix stands on the Verde River (Arizona, USA), quantified patterns of AMF richness and colonization along complex floodplain gradients, and identified environmental variables responsible for structuring the AMF community. Samples from 61 Populus-Salix stands were analyzed for AMF and herbaceous composition, AMF colonization, gravimetric soil moisture, soil texture, per cent organic matter, pH, and concentrations of nitrate, bicarbonate phosphorus and exchangeable potassium. AMF species richness declined with stand age and distance from and elevation above the channel and was positively related to perennial species cover and richness and gravimetric soil moisture. Distance from and elevation above the active channel, forest age, annual species cover, perennial species richness, and exchangeable potassium concentration all played a role in structuring the AMF community in this riparian area. Most AMF species were found across a wide range of soil conditions, but a subset of species tended to occur more often in hydric areas. This group of riparian affiliate AMF species includes several not previously encountered in the surrounding Sonoran desert.
DOI: 10.1111/j.1469-8137.2006.01668.x
PubMed: 16608461
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pubmed:16608461Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Arizona (MeSH)</term>
<term>Climate (MeSH)</term>
<term>Ecosystem (MeSH)</term>
<term>Geography (MeSH)</term>
<term>Mycorrhizae (growth & development)</term>
<term>Mycorrhizae (isolation & purification)</term>
<term>Plant Roots (microbiology)</term>
<term>Populus (microbiology)</term>
<term>Salix (microbiology)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Arizona (MeSH)</term>
<term>Climat (MeSH)</term>
<term>Géographie (MeSH)</term>
<term>Mycorhizes (croissance et développement)</term>
<term>Mycorhizes (isolement et purification)</term>
<term>Populus (microbiologie)</term>
<term>Racines de plante (microbiologie)</term>
<term>Salix (microbiologie)</term>
<term>Écosystème (MeSH)</term>
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<front><div type="abstract" xml:lang="en">This study examined the activity, species richness, and species composition of the arbuscular mycorrhizal fungal (AMF) community of Populus-Salix stands on the Verde River (Arizona, USA), quantified patterns of AMF richness and colonization along complex floodplain gradients, and identified environmental variables responsible for structuring the AMF community. Samples from 61 Populus-Salix stands were analyzed for AMF and herbaceous composition, AMF colonization, gravimetric soil moisture, soil texture, per cent organic matter, pH, and concentrations of nitrate, bicarbonate phosphorus and exchangeable potassium. AMF species richness declined with stand age and distance from and elevation above the channel and was positively related to perennial species cover and richness and gravimetric soil moisture. Distance from and elevation above the active channel, forest age, annual species cover, perennial species richness, and exchangeable potassium concentration all played a role in structuring the AMF community in this riparian area. Most AMF species were found across a wide range of soil conditions, but a subset of species tended to occur more often in hydric areas. This group of riparian affiliate AMF species includes several not previously encountered in the surrounding Sonoran desert.</div>
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<Abstract><AbstractText>This study examined the activity, species richness, and species composition of the arbuscular mycorrhizal fungal (AMF) community of Populus-Salix stands on the Verde River (Arizona, USA), quantified patterns of AMF richness and colonization along complex floodplain gradients, and identified environmental variables responsible for structuring the AMF community. Samples from 61 Populus-Salix stands were analyzed for AMF and herbaceous composition, AMF colonization, gravimetric soil moisture, soil texture, per cent organic matter, pH, and concentrations of nitrate, bicarbonate phosphorus and exchangeable potassium. AMF species richness declined with stand age and distance from and elevation above the channel and was positively related to perennial species cover and richness and gravimetric soil moisture. Distance from and elevation above the active channel, forest age, annual species cover, perennial species richness, and exchangeable potassium concentration all played a role in structuring the AMF community in this riparian area. Most AMF species were found across a wide range of soil conditions, but a subset of species tended to occur more often in hydric areas. This group of riparian affiliate AMF species includes several not previously encountered in the surrounding Sonoran desert.</AbstractText>
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