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Landscape structure shapes the diversity of tree seedlings at multiple spatial scales in a fragmented tropical rainforest.
Nicasio-Arzeta, Sergio; Zermeño-Hernández, Isela E; Maza-Villalobos, Susana; Benítez-Malvido, Julieta.
Afiliação
  • Nicasio-Arzeta S; Programa de Doctorado en Ciencias Biomédicas, Universidad Nacional Autónoma de México (UNAM), Ciudad de México, Morelia, México.
  • Zermeño-Hernández IE; Instituto de Investigaciones en Ecosistemas y Sustentabilidad, Universidad Nacional Autónoma de México, Morelia, Michoacán, México.
  • Maza-Villalobos S; CONACyT-Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán, Mexico.
  • Benítez-Malvido J; CONACyT-El Colegio de la Frontera Sur, Tapachula, Chiapas, México.
PLoS One ; 16(7): e0253284, 2021.
Article em En | MEDLINE | ID: mdl-34270566
The maintenance of seedling diversity of animal-dispersed tree species is fundamental for the structure and function of forest patches in fragmented tropical rainforests. Nonetheless, the effects of landscape structure at different spatial scales on α- and ß-diversity of tree seedling communities are recently explored. Using a multi-scale approach, we assessed the relative effect of landscape composition and configuration on α- and ß-diversity of animal-dispersed seedlings within 16 forest patches in the Lacandona rainforest, Mexico. We assessed these effects at 13 spatial scales (from 300 to 1500 m radius, at 100 m intervals) for three metrics of effective number of species considering α- and ß-diversity. We found that α-diversity was largely affected by landscape composition and ß-diversity by landscape configuration. On the one hand, the amount of secondary forest influenced α-diversity. Additionally, species richness increased in landscapes with highly aggregated forest patches. On the other hand, ß-diversity was affected positively by forest fragmentation and negatively by the edge contrast of forest patches with the surrounding matrix. Our findings indicate that landscape configuration is a strong driver of seedling diversity in highly deforested rainforests. Promoting forest patches and secondary forests through payment for ecosystem services' programs, favoring matrix quality within land-sharing schemes of smallholder agriculture and secondary forest management, and identifying restoration opportunities for assisted or unassisted natural regeneration are urgently needed for conservation of seedling diversity in human-modified tropical landscapes.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Árvores / Plântula / Biodiversidade / Floresta Úmida Tipo de estudo: Prognostic_studies / Risk_factors_studies País/Região como assunto: Mexico Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Árvores / Plântula / Biodiversidade / Floresta Úmida Tipo de estudo: Prognostic_studies / Risk_factors_studies País/Região como assunto: Mexico Idioma: En Revista: PLoS One Assunto da revista: CIENCIA / MEDICINA Ano de publicação: 2021 Tipo de documento: Article