Climatic stability and contemporary human impacts affect the genetic diversity and conservation status of a tropical palm in the Atlantic Forest of Brazil

Autor(es)

Carvalho, Carolina da Silva ; Ballesteros-Mejia, Liliana ; Ribeiro, Milton Cezar ; Cortes, Marina Correa ; Santos, Alesandro Souza ; Collevatti, Rosane Garcia

• Tipo de documento: Artigo Científico
• Fonte: CONSERVATION GENETICS; v. 18, n. 2, p. 467-478, APR 2017.
• Citações Web of Science: 8

Resumo

Understanding how historical and current environmental suitability and human impacts affect the genetic diversity on a large scale is essential to species management planning. However, most studies in conservation genetics are carried out at a local or regional scale and rarely on broad spatial scales such as an entire biome. We evaluated the relative contribution of historical and current environmental suitability, current landscape features and human impacts to explain genetic diversity, allelic richness and inbreeding variation among populations, using Euterpe edulis and the Atlantic forest as the model system. We fitted linear mixed models within a multiple competing hypotheses approach with model selection based on Akaike's Information Criteria. We showed that overall genetic diversity was lower in sites with absence of large seed dispersers and higher in sites with historically stable climate. Both seedling and adults showed to be negatively influenced by human impact factors; with adults mainly affected by the reduction of forest cover while seedlings by the loss of large seed dispersers. Thus, the current pattern of genetic diversity in E. edulis is the result of historical instability during the mid-Holocene and recent anthropogenic impacts, mainly those that affect important ecological process such as seed dispersal. Thus, an efficient plan for species conservation must account for human impacts and environmental suitability and also assess the genetic diversity of seedlings and adults in fragmented landscapes. (AU)

• Processo FAPESP: 13/50421-2 - Novos métodos de amostragem e ferramentas estatísticas para pesquisa em biodiversidade: integrando ecologia de movimento com ecologia de população e comunidade
• Beneficiário: Milton Cezar Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/01029-5 - Efeitos ecológicos e genéticos da variação do tamanho das sementes em paisagem defaunada
• Beneficiário: Carolina da Silva Carvalho
• Modalidade de apoio: Bolsas no Brasil - Doutorado