Interactive effects of warming and invertebrate grazing on the outcomes of competitive fungal interactions

Abstract Saprotrophic fungal community composition, determined by the outcomes of competitive mycelial interactions, represents a key determinant of woodland carbon and nutrient cycling. Atmospheric warming is predicted to drive changes in fungal community composition. Grazing by invertebrates can a...

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Veröffentlicht in:FEMS microbiology ecology 2012-08, Vol.81 (2), p.419-426
Hauptverfasser: Crowther, Thomas W., Littleboy, Adam, Jones, T. Hefin, Boddy, Lynne
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creator Crowther, Thomas W.
Littleboy, Adam
Jones, T. Hefin
Boddy, Lynne
description Abstract Saprotrophic fungal community composition, determined by the outcomes of competitive mycelial interactions, represents a key determinant of woodland carbon and nutrient cycling. Atmospheric warming is predicted to drive changes in fungal community composition. Grazing by invertebrates can also exert selective pressures on fungal communities and alter the outcome of competitive fungal interactions; their potential to do so is determined by grazing intensity. Temperature regulates the abundance of soil collembola, but it remains unclear whether this will alter the top-down determination of fungal community composition. We use soil microcosms to explore the direct (via effects on interacting fungi) and indirect (by influencing top-down grazing pressures) effects of a 3 °C temperature increase on the outcomes of competitive interactions between cord-forming basidiomycete fungi. By differentially affecting the fungal growth rates, warming reversed the outcomes of specific competitive interactions. Collembola populations also increased at elevated temperature, and these larger, more active, populations exerted stronger grazing pressures. Consequently, grazing mitigated the effects of temperature on these interactions, restoring fungal communities to those recorded at ambient temperature. The interactive effects of biotic and abiotic factors are a key in determining the functional and ecological responses of microbial communities to climate change.
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We use soil microcosms to explore the direct (via effects on interacting fungi) and indirect (by influencing top-down grazing pressures) effects of a 3 °C temperature increase on the outcomes of competitive interactions between cord-forming basidiomycete fungi. By differentially affecting the fungal growth rates, warming reversed the outcomes of specific competitive interactions. Collembola populations also increased at elevated temperature, and these larger, more active, populations exerted stronger grazing pressures. Consequently, grazing mitigated the effects of temperature on these interactions, restoring fungal communities to those recorded at ambient temperature. 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Psychology ; fungal community ; Grazing ; Grazing intensity ; Herbivores ; High temperature ; Invertebrata ; Invertebrates ; Microbial activity ; Microbial ecology ; Microbiology ; Miscellaneous ; Mycology ; Nutrient cycles ; soil biodiversity ; soil fauna ; Soil Microbiology ; Temperature ; Various environments (extraatmospheric space, air, water) ; Wood - microbiology ; Woodlands</subject><ispartof>FEMS microbiology ecology, 2012-08, Vol.81 (2), p.419-426</ispartof><rights>2012 Federation of European Microbiological Societies 2012</rights><rights>2012 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved</rights><rights>2015 INIST-CNRS</rights><rights>2012 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. All rights reserved.</rights><rights>Copyright © 2012 Federation of European Microbiological Societies. Published by Blackwell Publishing Ltd. 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Hefin</creatorcontrib><creatorcontrib>Boddy, Lynne</creatorcontrib><title>Interactive effects of warming and invertebrate grazing on the outcomes of competitive fungal interactions</title><title>FEMS microbiology ecology</title><addtitle>FEMS Microbiol Ecol</addtitle><description>Abstract Saprotrophic fungal community composition, determined by the outcomes of competitive mycelial interactions, represents a key determinant of woodland carbon and nutrient cycling. Atmospheric warming is predicted to drive changes in fungal community composition. Grazing by invertebrates can also exert selective pressures on fungal communities and alter the outcome of competitive fungal interactions; their potential to do so is determined by grazing intensity. Temperature regulates the abundance of soil collembola, but it remains unclear whether this will alter the top-down determination of fungal community composition. We use soil microcosms to explore the direct (via effects on interacting fungi) and indirect (by influencing top-down grazing pressures) effects of a 3 °C temperature increase on the outcomes of competitive interactions between cord-forming basidiomycete fungi. By differentially affecting the fungal growth rates, warming reversed the outcomes of specific competitive interactions. Collembola populations also increased at elevated temperature, and these larger, more active, populations exerted stronger grazing pressures. Consequently, grazing mitigated the effects of temperature on these interactions, restoring fungal communities to those recorded at ambient temperature. 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source Oxford Journals Open Access Collection; MEDLINE; Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
subjects Abiotic factors
Ambient temperature
Animal, plant and microbial ecology
Animals
Arthropods - physiology
Basidiomycetes
Basidiomycota - growth & development
Basidiomycota - physiology
Biological and medical sciences
Climate Change
Collembola
Community composition
Competition
decomposition
Ecology
Ecosystem
ecosystem function
Fundamental and applied biological sciences. Psychology
fungal community
Grazing
Grazing intensity
Herbivores
High temperature
Invertebrata
Invertebrates
Microbial activity
Microbial ecology
Microbiology
Miscellaneous
Mycology
Nutrient cycles
soil biodiversity
soil fauna
Soil Microbiology
Temperature
Various environments (extraatmospheric space, air, water)
Wood - microbiology
Woodlands
title Interactive effects of warming and invertebrate grazing on the outcomes of competitive fungal interactions
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