Elemental composition and degree of homeostasis of fungi: are aquatic hyphomycetes more like metazoans, bacteria or plants?

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• 作者：Michael Danger ; Eric Chauvet
• 关键词：Decomposition models ; Ecological stoichiometry ; Elemental composition ; Homeostasis ; Microbial decomposers ; Nutrient recycling
• 刊名：Fungal Ecology
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：6
• 期：5
• 页码：453-457
• 全文大小：408 K

文摘

Ecological stoichiometry generally assumes that heterotrophs have a higher degree of elemental homeostasis than autotrophs. Differences between fixed consumer nutrient requirements and nutrients available in resources allow prediction of the intensity of nutrient recycling ensured by heterotrophs. Despite their fundamental role in detritus decomposition, extremely few data are currently available on fungal elemental composition. In this study, we quantified the degree of elemental homeostasis of aquatic hyphomycetes used as model organisms. Contrary to metazoans, but similar to plants, aquatic hyphomycetes exhibited highly plastic elemental compositions. Mycelium also reached far higher C/nutrient ratios than reported for bacteria. Our results suggest that non-homeostasis of fungi should be explicitly included in stoichiometric models dealing with nutrient recycling, and that the discrepancy in homeostasis between some bacterial strains and fungi should certainly be considered when investigating interactions between both groups of decomposers.