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Bartholomew DC, Hayward R, Burslem DFRP, Bittencourt PRL, Chapman D, Bin Suis MAF, Nilus R, O'Brien MJ, Reynolds G, Rowland L, Banin LF, Dent D. Bornean tropical forests recovering from logging at risk of regeneration failure. GLOBAL CHANGE BIOLOGY 2024; 30:e17209. [PMID: 38469989 DOI: 10.1111/gcb.17209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 01/08/2024] [Accepted: 01/17/2024] [Indexed: 03/13/2024]
Abstract
Active restoration through silvicultural treatments (enrichment planting, cutting climbers and liberation thinning) is considered an important intervention in logged forests. However, its ability to enhance regeneration is key for long-term recovery of logged forests, which remains poorly understood, particularly for the production and survival of seedlings in subsequent generations. To understand the long-term impacts of logging and restoration we tracked the diversity, survival and traits of seedlings that germinated immediately after a mast fruiting in North Borneo in unlogged and logged forests 30-35 years after logging. We monitored 5119 seedlings from germination for ~1.5 years across a mixed landscape of unlogged forests (ULs), naturally regenerating logged forests (NR) and actively restored logged forests via rehabilitative silvicultural treatments (AR), 15-27 years after restoration. We measured 14 leaf, root and biomass allocation traits on 399 seedlings from 15 species. Soon after fruiting, UL and AR forests had higher seedling densities than NR forest, but survival was the lowest in AR forests in the first 6 months. Community composition differed among forest types; AR and NR forests had lower species richness and lower evenness than UL forests by 5-6 months post-mast but did not differ between them. Differences in community composition altered community-weighted mean trait values across forest types, with higher root biomass allocation in NR relative to UL forest. Traits influenced mortality ~3 months post-mast, with more acquisitive traits and relative aboveground investment favoured in AR forests relative to UL forests. Our findings of reduced seedling survival and diversity suggest long time lags in post-logging recruitment, particularly for some taxa. Active restoration of logged forests recovers initial seedling production, but elevated mortality in AR forests lowers the efficacy of active restoration to enhance recruitment or diversity of seedling communities. This suggests current active restoration practices may fail to overcome barriers to regeneration in logged forests, which may drive long-term changes in future forest plant communities.
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Affiliation(s)
- David C Bartholomew
- School of Geography, University of Exeter, Exeter, UK
- Department of Ecology and Environmental Science, Umeå University, Umeå, Sweden
- Botanic Gardens Conservation International, Richmond, UK
| | - Robin Hayward
- Biological and Environmental Sciences, University of Stirling, Stirling, UK
- School of Earth and Environment, University of Leeds, Leeds, UK
| | | | | | - Daniel Chapman
- Biological and Environmental Sciences, University of Stirling, Stirling, UK
| | | | - Reuben Nilus
- Forest Research Centre Sepilok, Sandakan, Malaysia
| | - Michael J O'Brien
- Estación Experimental de Zonas Áridas, Consejo Superior de Investigaciones Científicas, Almería, Spain
| | - Glen Reynolds
- SE Asia Rainforest Research Partnership, Kota Kinabalu, Sabah, Malaysia
| | - Lucy Rowland
- School of Geography, University of Exeter, Exeter, UK
| | | | - Daisy Dent
- Smithsonian Tropical Research Institute, Balboa, Panama
- Department of Environmental Systems Science, ETH, Zürich, Switzerland
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Norman DL, Bischoff PH, Wearn OR, Ewers RM, Rowcliffe JM, Evans B, Sethi S, Chapman PM, Freeman R. Can CNN‐based species classification generalise across variation in habitat within a camera trap survey? Methods Ecol Evol 2022. [DOI: 10.1111/2041-210x.14031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Danielle L. Norman
- Department of Life Sciences Imperial College London Ascot UK
- Institute of Zoology, Zoological Society of London London UK
| | | | - Oliver R. Wearn
- Institute of Zoology, Zoological Society of London London UK
- Fauna & Flora International – Vietnam Programme Hanoi Vietnam
| | - Robert M. Ewers
- Department of Life Sciences Imperial College London Ascot UK
| | | | - Benjamin Evans
- Institute of Zoology, Zoological Society of London London UK
- Brunel University London, Kingston Lane Uxbridge UK
| | - Sarab Sethi
- Department of Plant Sciences University of Cambridge Cambridge UK
- Centre for Biodiversity and Environment Research University College London London UK
| | | | - Robin Freeman
- Institute of Zoology, Zoological Society of London London UK
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Davison CW, Rahbek C, Morueta-Holme N. Land-use change and biodiversity: Challenges for assembling evidence on the greatest threat to nature. GLOBAL CHANGE BIOLOGY 2021; 27:5414-5429. [PMID: 34392585 DOI: 10.1111/gcb.15846] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 03/26/2021] [Accepted: 07/15/2021] [Indexed: 06/13/2023]
Abstract
Land-use change is considered the greatest threat to nature, having caused worldwide declines in the abundance, diversity, and health of species and ecosystems. Despite increasing research on this global change driver, there are still challenges to forming an effective synthesis. The estimated impact of land-use change on biodiversity can depend on location, research methods, and taxonomic focus, with recent global meta-analyses reaching disparate conclusions. Here, we critically appraise this research body and our ability to reach a reliable consensus. We employ named entity recognition to analyze more than 4000 abstracts, alongside full reading of 100 randomly selected papers. We highlight the broad range of study designs and methodologies used; the most common being local space-for-time comparisons that classify land use in situ. Species metrics including abundance, distribution, and diversity were measured more frequently than complex responses such as demography, vital rates, and behavior. We identified taxonomic biases, with vertebrates well represented while detritivores were largely missing. Omitting this group may hinder our understanding of how land-use change affects ecosystem feedback. Research was heavily biased toward temperate forested biomes in North America and Europe, with warmer regions being acutely underrepresented despite offering potential insights into the future effects of land-use change under novel climates. Various land-use histories were covered, although more research in understudied regions including Africa and the Middle East is required to capture regional differences in the form of current and historical land-use practices. Failure to address these challenges will impede our global understanding of land-use change impacts on biodiversity, limit the reliability of future projections and have repercussions for the conservation of threatened species. Beyond identifying literature biases, we highlight the research priorities and data gaps that need urgent attention and offer perspectives on how to move forward.
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Affiliation(s)
- Charles W Davison
- Center for Macroecology, Evolution and Climate, GLOBE Institute, University of Copenhagen, Copenhagen, Denmark
| | - Carsten Rahbek
- Center for Macroecology, Evolution and Climate, GLOBE Institute, University of Copenhagen, Copenhagen, Denmark
- Center for Global Mountain Biodiversity, GLOBE Institute, University of Copenhagen, Copenhagen, Denmark
- Institute of Ecology, Peking University, Beijing, China
- Department of Life Sciences, Imperial College London, Ascot, UK
- Danish Institute for Advanced Study, University of Southern Denmark, Odense, Denmark
| | - Naia Morueta-Holme
- Center for Macroecology, Evolution and Climate, GLOBE Institute, University of Copenhagen, Copenhagen, Denmark
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Kurz DJ, Saikim FH, Justine VT, Bloem J, Libassi M, Luskin MS, Withey LS, Goossens B, Brashares JS, Potts MD. Transformation and endurance of Indigenous hunting: Kadazandusun‐Murut bearded pig hunting practices amidst oil palm expansion and urbanization in Sabah, Malaysia. PEOPLE AND NATURE 2021. [DOI: 10.1002/pan3.10250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- David J. Kurz
- Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA USA
| | - Fiffy Hanisdah Saikim
- Institute for Tropical Biology and Conservation Universiti Malaysia SabahJalan UMS Sabah Malaysia
| | | | - Jordan Bloem
- Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA USA
| | - Matthew Libassi
- Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA USA
| | | | - Lauren S. Withey
- Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA USA
| | - Benoît Goossens
- Organisms and Environment Division School of Biosciences Cardiff University Cardiff UK
- Danau Girang Field Centre, c/o Sabah Wildlife Department Wisma Muis Sabah Malaysia
- Sabah Wildlife Department Wisma Muis Sabah Malaysia
- Sustainable Places Research InstituteCardiff University Cardiff UK
| | - Justin S. Brashares
- Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA USA
| | - Matthew D. Potts
- Department of Environmental Science, Policy, and Management University of California, Berkeley Berkeley CA USA
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Huang G, Sreekar R, Velho N, Corlett RT, Quan R, Tomlinson KW. Combining camera‐trap surveys and hunter interviews to determine the status of mammals in protected rainforests and rubber plantations of Menglun, Xishuangbanna, SW China. Anim Conserv 2020. [DOI: 10.1111/acv.12588] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- G. Huang
- Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Menglun Yunnan China
- Environmental Futures Research Institute Griffith University Nathan QLD Australia
| | - R. Sreekar
- Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Menglun Yunnan China
- Institute of Entomology Biology Centre of the Czech Academy of Sciences Ceske Budejovice Czech Republic
| | - N. Velho
- Department of Ecology, Evolution and Environmental Biology Columbia UniversitySchermerhorn Extension New York NY USA
| | - R. T. Corlett
- Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Menglun Yunnan China
| | - R.‐C. Quan
- Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Menglun Yunnan China
| | - K. W. Tomlinson
- Center for Integrative Conservation Xishuangbanna Tropical Botanical Garden Menglun Yunnan China
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