Non-native Douglas fir promotes epigeal spider density, but has a mixed effect on functional diversity

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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Non-native Douglas fir promotes epigeal spider density, but has a mixed effect on functional diversity. / Matevski, Dragan; Schuldt, Andreas.
in: Biodiversity and Conservation, Jahrgang 32, Nr. 4, 03.2023, S. 1233-1250.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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@article{9d4f09860fdc4cdcab34f31fd29313c2,
title = "Non-native Douglas fir promotes epigeal spider density, but has a mixed effect on functional diversity",
abstract = "With climate change altering ecosystems worldwide, forest management in Europe is increasingly relying on more adaptable non-native tree species, such as Douglas fir (Pseudotsuga menziesii). However, the ecological consequences of the increased utilization of Douglas fir on arthropod diversity and ecosystem functioning are not fully known. Here we assessed how non-native Douglas fir as well as large- and small-scale differences in the environmental context, affect epigeal spider abundance, biomass, taxonomic and functional diversity, and community structure in Central European forests. Our study sites were divided into two regions with large differences in environmental conditions, with seven replicates of five stand types, including monocultures of native European beech (Fagus sylvatica), non-native Douglas fir and native Norway spruce (Picea abies), as well as two-species mixtures of European beech and each of the conifers. Contrary to our expectations, Douglas fir promoted small-scale spider diversity, and abundance and biomass (activity density). On the other hand, it decreased spider functional divergence and altered spider community structure. Microhabitat characteristics had opposing effects on spider diversity and activity density, with more open stands harboring a more diverse but less abundant spider community. Overall, our findings suggest that increasing Douglas fir utilization at the expense of Norway spruce does not necessarily decrease the diversity of epigeal arthropods and may even promote local spider diversity and activity density. However, care needs to be taken in terms of biodiversity conservation because typical forest spider species and their functional divergence were more strongly associated with native beech than with coniferous stands.",
keywords = "Community structure, Forest specialists, Microhabitat variability, Mixed-species forestry, Pseudotsuga menziesii, Top-down control",
author = "Dragan Matevski and Andreas Schuldt",
note = "Funding Information: D.M. acknowledges funding by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 316045089/GRK2300. Publisher Copyright: {\textcopyright} 2023, The Author(s).",
year = "2023",
month = mar,
doi = "10.1007/s10531-023-02547-5",
language = "English",
volume = "32",
pages = "1233--1250",
journal = "Biodiversity and Conservation",
issn = "0960-3115",
publisher = "Springer Science and Business Media B.V.",
number = "4",

}

RIS

TY - JOUR

T1 - Non-native Douglas fir promotes epigeal spider density, but has a mixed effect on functional diversity

AU - Matevski, Dragan

AU - Schuldt, Andreas

N1 - Funding Information: D.M. acknowledges funding by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – 316045089/GRK2300. Publisher Copyright: © 2023, The Author(s).

PY - 2023/3

Y1 - 2023/3

N2 - With climate change altering ecosystems worldwide, forest management in Europe is increasingly relying on more adaptable non-native tree species, such as Douglas fir (Pseudotsuga menziesii). However, the ecological consequences of the increased utilization of Douglas fir on arthropod diversity and ecosystem functioning are not fully known. Here we assessed how non-native Douglas fir as well as large- and small-scale differences in the environmental context, affect epigeal spider abundance, biomass, taxonomic and functional diversity, and community structure in Central European forests. Our study sites were divided into two regions with large differences in environmental conditions, with seven replicates of five stand types, including monocultures of native European beech (Fagus sylvatica), non-native Douglas fir and native Norway spruce (Picea abies), as well as two-species mixtures of European beech and each of the conifers. Contrary to our expectations, Douglas fir promoted small-scale spider diversity, and abundance and biomass (activity density). On the other hand, it decreased spider functional divergence and altered spider community structure. Microhabitat characteristics had opposing effects on spider diversity and activity density, with more open stands harboring a more diverse but less abundant spider community. Overall, our findings suggest that increasing Douglas fir utilization at the expense of Norway spruce does not necessarily decrease the diversity of epigeal arthropods and may even promote local spider diversity and activity density. However, care needs to be taken in terms of biodiversity conservation because typical forest spider species and their functional divergence were more strongly associated with native beech than with coniferous stands.

AB - With climate change altering ecosystems worldwide, forest management in Europe is increasingly relying on more adaptable non-native tree species, such as Douglas fir (Pseudotsuga menziesii). However, the ecological consequences of the increased utilization of Douglas fir on arthropod diversity and ecosystem functioning are not fully known. Here we assessed how non-native Douglas fir as well as large- and small-scale differences in the environmental context, affect epigeal spider abundance, biomass, taxonomic and functional diversity, and community structure in Central European forests. Our study sites were divided into two regions with large differences in environmental conditions, with seven replicates of five stand types, including monocultures of native European beech (Fagus sylvatica), non-native Douglas fir and native Norway spruce (Picea abies), as well as two-species mixtures of European beech and each of the conifers. Contrary to our expectations, Douglas fir promoted small-scale spider diversity, and abundance and biomass (activity density). On the other hand, it decreased spider functional divergence and altered spider community structure. Microhabitat characteristics had opposing effects on spider diversity and activity density, with more open stands harboring a more diverse but less abundant spider community. Overall, our findings suggest that increasing Douglas fir utilization at the expense of Norway spruce does not necessarily decrease the diversity of epigeal arthropods and may even promote local spider diversity and activity density. However, care needs to be taken in terms of biodiversity conservation because typical forest spider species and their functional divergence were more strongly associated with native beech than with coniferous stands.

KW - Community structure

KW - Forest specialists

KW - Microhabitat variability

KW - Mixed-species forestry

KW - Pseudotsuga menziesii

KW - Top-down control

UR - http://www.scopus.com/inward/record.url?scp=85147758448&partnerID=8YFLogxK

U2 - 10.1007/s10531-023-02547-5

DO - 10.1007/s10531-023-02547-5

M3 - Journal articles

AN - SCOPUS:85147758448

VL - 32

SP - 1233

EP - 1250

JO - Biodiversity and Conservation

JF - Biodiversity and Conservation

SN - 0960-3115

IS - 4

ER -

DOI

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