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Fungal Community-Plant Litter Decomposition Relationships Along a Climate Gradient

Pedosphere 2014年第4期24卷 437-449页

作者： C.SHERMAN I.GRISHKAN G.BARNESS Y.STEINBERGER The Mina & Everard Goodman Faculty of Life Sciences Bar-Ilan UniversityRamat-Gan 5290002(Israel) Institute of Evolution University of HaifaMount CarmelHaifa 31905(Israel)

The decomposition of plant litter is a major process of equivalent status to primary production in ecosystem *** spatiotemporal changes in the composition and dynamics of litter fungal community along a climate gradient ranging from arid desert to humid-Mediterranean regions in Israel was examined using wheat straw litter bags placed at four selected sites along the climate gradient,arid,semi-arid,Mediterranean,and humid-Mediterranean *** samples were collected over a two-year decomposition period to evaluate litter weight loss,moisture,C:N ratio,fungal composition,and isolate *** litter decomposition rate was found to be the highest during the first year of the study at the Mediterranean and arid *** the Shannon-Wiener index values of the fungal communities in the litter samples were the highest at the humid-Mediterranean site,the number of fungal species was not significantly different between the four study *** fungal groups were found to be related to different study sites:Basidiomycota,Mucoromycotina,and teleomorphic Ascomycota were associated with the humid-Mediterranean site,while Coelomycetes were mostly affected by the arid *** results indicate that climate factors play an important role in determining the structure of saprotrophic fungal communities in the decomposing litter and in mediating plant litter decomposition processes.

关键词： arid desert community structure fungal diversity litter bag Mediterranean region saprotrophic fungi Shannon-Wiener index

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