Changes in fine-scale spatial genetic structure related to protection status in Atlantic Rain Forest fragment

Borges, Daniela B.; Mariano‐Neto, Eduardo; Caribé, D.S.; Corrêa, Ronan Xavier; Gaiotto, Fernanda Amato

doi:10.1016/j.jnc.2019.125784

Cited by 3 publications

(2 citation statements)

References 60 publications

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“…However, considering that the intensification of deforestation in southern Bahia took place in the 1990s, there would have been time for a maximum of two generations, since the species has generation time of about 18 years (Carvalho, Lucas, & Côrtes, 2021 ; Franco & Silvertown, 2004 ; Galetti et al, 2013 ). Therefore, we believe that populations inserted in landscapes with a low percentage of forest may suffer a loss of genetic diversity in the short – medium term, if these populations remain small and isolated (Borges et al, 2020 ; Lowe et al, 2015 ; Santos et al, 2015 ; Soares et al, 2019 ). On the other hand, we did not find evidence that landscape‐scale forest cover has influenced patterns of neutral or outlier genetic variability in the BA_NR region.…”

Section: Discussionmentioning

confidence: 99%

Tropical forest loss and geographic location drive the functional genomic diversity of an endangered palm tree

Santos

Cazetta

Faria

et al. 2023

Evolutionary Applications

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Human activity has diminished forests in different terrestrial ecosystems. This is well illustrated in the Brazilian Atlantic Forest, which still hosts high levels of species richness and endemism, even with only 28% of its original extent remaining. The consequences of such forest loss in remaining populations can be investigated with several approaches, including the genomic perspective, which allows a broader understanding of how human disturbance influences the genetic variability in natural populations. In this context, our study investigated the genomic responses of Euterpe edulis Martius, an endangered palm tree, in forest remnants located in landscapes presenting different forest cover amount and composed by distinct bird assemblage that disperse its seeds. We sampled 22 areas of the Brazilian Atlantic Forest in four regions using SNP markers inserted into transcribed regions of the genome of E. edulis, distinguishing neutral loci from those putatively under natural selection (outlier). We demonstrate that populations show patterns of structure and genetic variability that differ between regions, as a possible reflection of deforestation and biogeographic histories. Deforested landscapes still maintain high neutral genetic diversity due to gene flow over short distances. Overall, we not only support previous evidence with microsatellite markers, but also show that deforestation can influence the genetic variability outlier, in the scenario of selective pressures imposed by these stressful environments. Based on our findings, we suggest that, to protect genetic diversity in the long term, it is necessary to reforest and enrich deforested areas, using seeds from populations in the same management target region.

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Section: Discussionmentioning

confidence: 99%

Tropical forest loss and geographic location drive the functional genomic diversity of an endangered palm tree

Santos

Cazetta

Faria

et al. 2023

Evolutionary Applications

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“…Dentre os fatores impactantes, merece destaque a fragmentação florestal, de forma que, atualmente, estima-se que restam apenas 26% de florestas nativas neste que é um importante hotspot de conservação da biodiversidade mundial (REZENDE et al, 2018). Além das consequências deletérias do isolamento, como aquelas relacionadas aos processos reprodutivos (BORGES et al, 2020), outro fator relevante é o efeito de borda, que se expressa a partir das mudanças abióticas e bióticas associadas à distância da interface entre as matrizes florestais e não-florestais, como, por exemplo, as alterações microclimáticas e da composição taxonômica das comunidades biológicas (HENTZ et al, 2018).…”

Section: Introductionunclassified

Dinâmica do componente arbóreo em função da distância da borda em uma floresta com araucária no Planalto Sul Catarinense, Brasil

et al. 2020

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O presente estudo objetivou analisar a dinâmica do componente arbóreo em floresta com araucária em função da distância da borda, em Santa Catarina, Brasil. Foram realizados levantamentos da vegetação em 2011 e 2015, pelo método de parcelas permanentes, em cinco transeções contendo dez parcelas de 200 m2 cada, sendo as cinco primeiras parcelas (0-50 m) definidas como setor borda e as cinco últimas (50-100 m) como interior. Em 2011, os indivíduos arbóreos foram inventariados e em 2015 os sobreviventes e mortos foram quantificados e os recrutas incorporados ao levantamento. Foram calculadas as taxas de mortalidade e recrutamento e as espécies foram classificadas em guildas de regeneração. Os resultados demonstraram que a dinâmica da comunidade não diferiu entre os setores, porém as guildas de regeneração apresentaram diferentes performances em função da distância da borda, com espécies existentes em luz favorecidas na borda e espécies tolerantes ao sombreamento no interior. Conclui-se que a fragmentação florestal tem o potencial de impactar negativamente o componente arbóreo na floresta com araucária.

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Genetic resilience of Atlantic forest trees to impacts of biome loss and fragmentation

et al. 2022

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Changes in fine-scale spatial genetic structure related to protection status in Atlantic Rain Forest fragment

Cited by 3 publications

References 60 publications

Tropical forest loss and geographic location drive the functional genomic diversity of an endangered palm tree

Tropical forest loss and geographic location drive the functional genomic diversity of an endangered palm tree

Dinâmica do componente arbóreo em função da distância da borda em uma floresta com araucária no Planalto Sul Catarinense, Brasil

Genetic resilience of Atlantic forest trees to impacts of biome loss and fragmentation

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