Localised invertebrate grazing moderates the effect of warming on competitive fungal interactions

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• 作者：A. Donald A'Bear ; Thomas W. Crowther¹ ; Ryan Ashfield ; Daniel D.A. Chadwick ; Joe Dempsey ; Louis Meletiou ; Cari L. Rees ; T. Hefin Jones ; Lynne Boddy ; ^{BoddyL@Cardiff.ac.uk} ; ^{BoddyL@cf.ac.uk}
• 关键词：Climate change ; Decomposition ; Ecosystem regulation ; Fungal community ; Soil biodiversity ; Soil fauna
• 刊名：Fungal Ecology
• 出版年：2013
• 出版时间：April, 2013
• 年：2013
• 卷：6
• 期：2
• 页码：137-140
• 全文大小：561 K

文摘

Outcomes of competitive mycelial interactions determine saprotrophic fungal community composition and are regulated by biotic (e.g. invertebrate grazing) and abiotic (e.g. climate) factors. Selective grazing can moderate the effects of elevated temperature on fungal interactions. In natural systems, however, patchy and aggregative distributions of invertebrates exert unequal grazing pressures on competing fungi. We explored whether restricting grazing to the territory of one fungal competitor affected the potential of Oniscus asellus (Isopoda) to control the outcomes of interactions and mediate responses to elevated temperature. Restricted grazing prevented the dominance of any one fungal species in the majority of interactions and, indirectly, altered the influence of warming. The location of grazer restriction was, however, only important during certain interactions. Selective pressures reflected feeding preferences, but grazer location determined the extent of selective grazing pressure exerted. Aggregation of macro-invertebrate grazers appears important in maintaining multi-species assemblages of wood-decomposer fungi in a changing climate.