Genetic diversity of reintroduced tree populations in restoration plantations of the Brazilian Atlantic Forest
| Autor: | João Paulo Gomes Viana, Ellida de Aguiar Silvestre, Marcos Vinicius Bohrer Monteiro Siqueira, Fabiano Lucas Araujo, Camila Menezes Trindade Macrini, Pedro H. S. Brancalion, Anete Pereira de Souza, Alessandro Alves-Pereira, Miklos Maximiliano Bajay, Gustavo Maruyama Mori, Carolina Grando, José Baldin Pinheiro, Maria Imaculada Zucchi, Kaiser Dias Schwarcz, Patricia Sanae Sujii, Ricardo Ribeiro Rodrigues |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
0301 basic medicine Conservation genetics Genetic diversity education.field_of_study Ecology Population Biodiversity Biology 010603 evolutionary biology 01 natural sciences Forest restoration 03 medical and health sciences 030104 developmental biology Biological dispersal Species richness education Restoration ecology Ecology Evolution Behavior and Systematics Nature and Landscape Conservation |
| Zdroj: | Restoration Ecology. 26:694-701 |
| ISSN: | 1061-2971 |
| DOI: | 10.1111/rec.12620 |
| Popis: | Long-term ecological success of large-scale restoration programs planned for the next decades will rely on genetic diversity (GD) of reintroduced or colonizing species, a limiting factor in highly fragmented landscapes. In small and isolated natural remnants or restoration areas, substantial reduction in population's size or connectivity may lead to local extinctions due to the accumulation of deleterious recessive alleles and ongoing reduction of fecundity, plant vigor, recruitment success, and adaptive potential. Despite the paramount role of GD for species persistence, its levels in restoration programs are poorly known. We assessed the GD of four model tree species (different succession stages, dispersal, and pollination syndromes) from the Brazilian Atlantic Forest, comparing two high-diversity restoration plantations, one forest fragment and one conserved remnant. Contrary to the expectation that the plantation strategies adopted in the restoration programs could result in genetic composition homogenization, we found that restoration areas established heterogeneous genetic groups with similar levels of neutral GD and inbreeding to those observed in natural forest remnants. This pattern was consistent across the four functionally different tree species, despite some species idiosyncrasies. For instance, we observed lower allelic richness in early successional species in restoration sites, suggesting that some species may be more prone to reintroduction with lower GD. Thus, we advocate the use of high GD levels in restoration to support biodiversity conservation in human-modified landscapes, thus reinforcing the role of ecological restoration for recovering the diversity of genes—the basic constituent of biodiversity. |
| Databáze: | OpenAIRE |
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