| Full text | |
| Author(s): |
dos Santos, Juliana Silveira
;
Vitorino, Luciana Cristina
;
Goncalves, Renata Fabrega
;
Cortes, Marina Correa
;
Cruz Alves, Rafael Souza
;
Ribeiro, Milton Cezar
;
Collevatti, Rosane Garcia
Total Authors: 7
|
| Document type: | Journal article |
| Source: | LANDSCAPE ECOLOGY; v. 37, n. 10, p. 21-pg., 2022-08-14. |
| Abstract | |
Context Despite the importance of secondary forests for the maintenance of biodiversity, the impact of pioneer trees on habitat loss and fragmentation is poorly understood. Objectives We analyzed the effects of landscape structure on genetic variability (node level analyses) and genetic differentiation (link level analyses) of the pioneer tree Cecropia hololeuca in the Atlantic Forest of southeastern Brazil. At the node level, we analyzed the effects of landscape structure (forest and pasture amount, compositional heterogeneity, number and shape of patches, and matrix dominance), topography (slope and elevation), and effective population size (Ne) on allelic richness (AR), genetic diversity (He) and inbreeding coefficient (f). At the link level, we analyzed the effect of four resistance surfaces (isolation by geographic distance, land cover, elevation, and slope) on genetic differentiation between populations (F-ST, G'(ST), Jost's D). Methods We genotyped 257 individuals of C. hololeuca using eight microsatellite loci. At the node level, we calculated landscape and topographic variables at six spatial scales. At the link level, we optimized the resistance surfaces using ResistanceGA. We used a model selection approach to select the most parsimonious models. Results At the node level, matrices dominated by pastures had higher AR than landscapes dominated by Eucalyptus at the 1500 m spatial scale. At the link level, F-ST was best explained by slope, with lower values imposing more resistance. All resistance surfaces explained G'(ST). Conclusions In addition to conserving and restoring habitats, management practices that improve matrix permeability should be adopted to favor the movement of dispersers, consequently improving natural regeneration, increasing allelic richness, and decreasing genetic differentiation of natural populations. (AU) | |
| FAPESP's process: | 20/01779-5 - Biodiversity in the Anthropocene: agroecosystem effects on biodiversity conservation and ecosystem function maintenance |
| Grantee: | Milton Cezar Ribeiro |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 21/10195-0 - Contribution of payment for ecosystem services on multi-dimensions within Atlantic Forest |
| Grantee: | Milton Cezar Ribeiro |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/19011-6 - The contribution of plant-animal interactions to biodiversity and ecosystem restoration of the Atlantic Forest |
| Grantee: | Marina Corrêa Côrtes |
| Support Opportunities: | BIOTA-FAPESP Program - Regular Research Grants |
| FAPESP's process: | 19/09713-6 - Proposal of an integrated and operational framework for monitoring the quality of areas in restoration process in the Atlantic Rain Forest |
| Grantee: | Juliana Silveira dos Santos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 21/08534-0 - Biodiversity and associated ecosystem services: LTER Corridor of Cantareira Mantiqueira |
| Grantee: | Milton Cezar Ribeiro |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 13/50421-2 - New sampling methods and statistical tools for biodiversity research: integrating animal movement ecology with population and community ecology |
| Grantee: | Milton Cezar Ribeiro |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 19/03005-0 - US-IALE 2019 Annual Meeting |
| Grantee: | Marina Corrêa Côrtes |
| Support Opportunities: | Research Grants - Meeting - Abroad |