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Tytuł pozycji:

Tree litter functional diversity and nitrogen concentration enhance litter decomposition via changes in earthworm communities

Tytuł:
Tree litter functional diversity and nitrogen concentration enhance litter decomposition via changes in earthworm communities
Autorzy:
Guillaume Patoine
Helge Bruelheide
Josephine Haase
Charles Nock
Niklas Ohlmann
Benjamin Schwarz
Michael Scherer‐Lorenzen
Nico Eisenhauer
Temat:
biodiversity–ecosystem function
BIOTREE
decomposers
litter mass loss
litter traits
macrodetritivores
Ecology
QH540-549.5
Źródło:
Ecology and Evolution, Vol 10, Iss 13, Pp 6752-6768 (2020)
Wydawca:
Wiley, 2020.
Rok publikacji:
2020
Kolekcja:
LCC:Ecology
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
ISSN:
2045-7758
Relacje:
https://doaj.org/toc/2045-7758
DOI:
10.1002/ece3.6474
Dostęp URL:
https://doaj.org/article/6bb8a6255d784dd88f6505b0674daeea  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.6bb8a6255d784dd88f6505b0674daeea
Czasopismo naukowe
Abstract Biodiversity is a major driver of numerous ecosystem functions. However, consequences of changes in forest biodiversity remain difficult to predict because of limited knowledge about how tree diversity influences ecosystem functions. Litter decomposition is a key process affecting nutrient cycling, productivity, and carbon storage and can be influenced by plant biodiversity. Leaf litter species composition, environmental conditions, and the detritivore community are main components of the decomposition process, but their complex interactions are poorly understood. In this study, we tested the effect of tree functional diversity (FD) on litter decomposition in a field experiment manipulating tree diversity and partitioned the effects of litter physiochemical diversity and the detritivore community. We used litterbags with different mesh sizes to separate the effects of microorganisms and microfauna, mesofauna, and macrofauna and monitored soil fauna using pitfall traps and earthworm extractions. We hypothesized that higher tree litter FD accelerates litter decomposition due to the availability of complementary food components and higher activity of detritivores. Although we did not find direct effects of tree FD on litter decomposition, we identified key litter traits and macrodetritivores that explained part of the process. Litter mass loss was found to decrease with an increase in leaf litter carbon:nitrogen ratio. Moreover, litter mass loss increased with an increasing density of epigeic earthworms, with most pronounced effects in litterbags with a smaller mesh size, indicating indirect effects. Higher litter FD and litter nutrient content were found to increase the density of surface‐dwelling macrofauna and epigeic earthworm biomass. Based on structural equation modeling, we conclude that tree FD has a weak positive effect on soil surface litter decomposition by increasing the density of epigeic earthworms and that litter nitrogen‐related traits play a central role in tree composition effects on soil fauna and decomposition.

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