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Thresholds for adding degraded tropical forest to the conservation estate

Ewers, Robert M., Orme, C. David L., Pearse, William, Zulkifli, Nursyamin, Yvon-Durocher, Genevieve, Yusah, Kalsum M., Yoh, Natalie, Yeo, Darren C.J., Wong, Anna, Williamson, Joseph, and others. (2024) Thresholds for adding degraded tropical forest to the conservation estate. Nature, 631 (8022). pp. 808-813. ISSN 0028-0836. E-ISSN 1476-4687. (doi:10.1038/s41586-024-07657-w) (KAR id:105742)

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Abstract

Logged and disturbed forests are often viewed as degraded and depauperate environments compared with primary forest. However, they are dynamic ecosystems1 that provide refugia for large amounts of biodiversity2,3, so we cannot afford to underestimate their conservation value4. Here we present empirically defined thresholds for categorizing the conservation value of logged forests, using one of the most comprehensive assessments of taxon responses to habitat degradation in any tropical forest environment. We analysed the impact of logging intensity on the individual occurrence patterns of 1,681 taxa belonging to 86 taxonomic orders and 126 functional groups in Sabah, Malaysia. Our results demonstrate the existence of two conservation-relevant thresholds. First, lightly logged forests (<29% biomass removal) retain high conservation value and a largely intact functional composition, and are therefore likely to recover their pre-logging values if allowed to undergo natural regeneration. Second, the most extreme impacts occur in heavily degraded forests with more than two-thirds (>68%) of their biomass removed, and these are likely to require more expensive measures to recover their biodiversity value. Overall, our data confirm that primary forests are irreplaceable5, but they also reinforce the message that logged forests retain considerable conservation value that should not be overlooked.

Item Type: Article
DOI/Identification number: 10.1038/s41586-024-07657-w
Additional information: For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.
Subjects: H Social Sciences
Divisions: Divisions > Division of Human and Social Sciences > School of Anthropology and Conservation > DICE (Durrell Institute of Conservation and Ecology)
Funders: Natural Environment Research Council (https://ror.org/02b5d8509)
Depositing User: Matthew Struebig
Date Deposited: 24 Apr 2024 13:44 UTC
Last Modified: 29 Jul 2024 13:37 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/105742 (The current URI for this page, for reference purposes)

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