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Immigration credit of temperate forest herbs in fragmented landscapes-Implications for restoration of habitat connectivity

Brunet, Jörg and Hedwall, Per-Ola and Lindgren, Jessica and Cousins, Sara A. O. (2021). Immigration credit of temperate forest herbs in fragmented landscapes-Implications for restoration of habitat connectivity. Journal of Applied Ecology. 58 , 2195-2206
[Research article]

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Abstract

In many agricultural landscapes, it is important to restore networks of forests to provide habitat and stepping stones for forest specialist taxa. More knowledge is, however, needed on how to facilitate the immigration of such taxa in restored forest patches. Here, we present the first chronosequence study to quantify the dynamics of immigration credits of forest specialist plants in post-arable forest patches. We studied the distribution of herbaceous forest specialist plant species in 54 post-arable broadleaved forest patches along gradients of age (20-140 years since forest establishment), distance from ancient forest (0-2,600 m) and patch area (0.5-9.6 ha). With linear mixed models, we estimated the effects of these factors on species richness, patch means of four dispersal-related plant traits and with generalized linear models on the occurrence of 20 individual species. Post-arable forest patch age and spatial isolation from ancient forest, but not patch size, were important predictors for species richness of forest specialists, suggesting that also small patches are valuable for habitat connectivity. Compared to species richness in ancient forest stands, the immigration credit was reduced by more than 90% after 80 years in post-arable forest patches contiguous to ancient forest compared to 40% after 80 years and 60% after 140 years in isolated patches (at least 100 m to next forest). Tall-growing species with adaptations to long-distance dispersal were faster colonizers, whereas species with heavy diaspores and clonal growth were slower to colonize. Synthesis and applications. We show that post-arable oak plantations have a high potential for restoration of forest herb vegetation. Dispersal-related plant traits play a key role in explaining interspecific differences among forest specialists. To facilitate forest herb immigration across all functional groups in agricultural landscapes, we suggest to create clusters of relatively small new forest patches nearby older forest with source populations.

Authors/Creators:Brunet, Jörg and Hedwall, Per-Ola and Lindgren, Jessica and Cousins, Sara A. O.
Title:Immigration credit of temperate forest herbs in fragmented landscapes-Implications for restoration of habitat connectivity
Series Name/Journal:Journal of Applied Ecology
Year of publishing :2021
Volume:58
Page range:2195-2206
Number of Pages:12
Publisher:WILEY
ISSN:0021-8901
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution-Noncommercial-No Derivative Works 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Forest Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:colonization credit, dispersal traits, forest restoration, fragmentation, habitat network, herbaceous understorey, post-agricultural forest, temperate deciduous forest
URN:NBN:urn:nbn:se:slu:epsilon-p-113994
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113994
Additional ID:
Type of IDID
DOI10.1111/1365-2664.13975
Web of Science (WoS)000687463700001
ID Code:25849
Faculty:S - Faculty of Forest Sciences
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: SLUpub Connector
Deposited On:18 Oct 2021 04:25
Metadata Last Modified:18 Oct 2021 05:01

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