Species turnover does not rescue biodiversity in fragmented landscapes

• 成果类型: Article
• 署名作者: Goncalves-Souza, Thiago; Chase, Jonathan M.; Haddad, Nick M.; Vancine, Mauricio H.; Didham, Raphael K.; Melo, Felipe L. P.; Aizen, Marcelo A.; Bernard, Enrico; Chiarello, Adriano G.; Faria, Deborah; Gibb, Heloise; de Lima, Marcelo G.; Magnago, Luiz F. S.; Mariano-Neto, Eduardo; Nogueira, Andre A.; Nemesio, Andre; Passamani, Marcelo; Pinho, Bruno X.; Rocha-Santos, Larissa; Rodrigues, Rodolpho C.; Safar, Nathalia Vieira Hissa; Santos, Braulio A.; Soto-Werschitz, Alejandra; Tabarelli, Marcelo; Uehara-Prado, Marcio; Vasconcelos, Heraldo L.; Vieira, Simone; Sanders, Nathan J.
• 署名单位: University of Michigan System; University of Michigan; University of Michigan System; University of Michigan; German Research Foundation (DFG); German Centre for Integrative Biodiversity Research (iDiv); Martin Luther University Halle Wittenberg; Michigan State University; Michigan State University; Universidade Estadual Paulista; University of Western Australia; Commonwealth Scientific & Industrial Research Organisation (CSIRO); CSIRO Health & Biosecurity; Universidade Federal de Pernambuco; Nottingham Trent University; Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad Nacional del Comahue; Universidade Federal de Pernambuco; Universidade de Sao Paulo; Universidade Estadual de Santa Cruz; La Trobe University; Universidade Federal do Sul da Bahia; Universidade Federal da Bahia; Universidade Federal de Uberlandia; Universidade Federal de Lavras; University of Bern; Universidade Federal da Paraiba; Universidad Autonoma de Queretaro; Universidade Estadual de Campinas
• 刊物名称: Nature
• ISSN/ISSBN: 0028-3014
• DOI: 10.1038/s41586-025-08688-7
• 发表日期: 2025-04-17
• 关键词: habitat amount hypothesis; beta-diversity; atlantic forest; responses; patterns; Extrapolation; connectivity; biogeography; rarefaction; richness

摘要

Habitat fragmentation generally reduces biodiversity at the patch scale (alpha diversity)1. However, there is ongoing debate about whether such negative effects can be alleviated at the landscape scale (gamma diversity) if among-patch diversity (beta diversity) increases as a result of fragmentation2, 3, 4, 5-6. This controversial view has not been rigorously tested. Here we use a dataset of 4,006 taxa across 37 studies from 6 continents to test the effects of fragmentation on biodiversity across scales by explicitly comparing continuous and fragmented landscapes. We find that fragmented landscapes consistently have both lower alpha diversity and lower gamma diversity. Although fragmented landscapes did tend to have higher beta diversity, this did not translate into higher gamma diversity. Our findings refute claims that habitat fragmentation can increase biodiversity at landscape scales, and emphasize the need to restore habitat and increase connectivity to minimize biodiversity loss at ever-increasing scales.