Patterns of endemism and beta diversity in amphibians and reptiles of the Amazon Basin: effects of habitat heterogeneity and anthropic impact DOI
Jhon Jairo López‐Rojas, Mirco Solé, Ricardo Lourenço‐de‐Moraes

и другие.

Biological Journal of the Linnean Society, Год журнала: 2025, Номер 145(2)

Опубликована: Июнь 1, 2025

Abstract Identifying conservation priorities in ecological hotspots such as the Amazon Basin requires an understanding of beta diversity and endemism patterns. This study explores amphibian reptile across 32 Amazonian ecoregions, analysing their relationships with habitat heterogeneity anthropogenic impacts. Using spatial data for 1839 species, we calculated weighted its components (turnover nestedness). Habitat variables (water, bare ground, trees, flooded vegetation, rangeland) impact indicators (built areas crops) were derived from land cover data, regression models assessed effects on metrics. Our results reveal substantial variability western montane ecoregions exhibiting highest values. Beta diversity, driven primarily by turnover, was elevated Anura, Gymnophiona, lizards, snakes, reflecting regionally distinct species compositions. heterogeneity, particularly positively influenced both while caudates crocodilians showed lower sensitivity to variability. Anthropogenic impacts built contributed higher values most groups, whereas crops had minimal effects. These findings highlight Basin’s critical biodiversity high turnover. The dominance turnover over nestedness emphasizes unique compositions within each ecoregion. Targeted strategies are urgently needed mitigate urbanization prioritize preservation habitats endemism, ensuring long-term protection biodiversity.

Язык: Английский

Population genomics of Anopheles darlingi, the principal South American malaria vector mosquito DOI Creative Commons
Jacob A. Tennessen,

Raphael Brosula,

Estelle Chabanol

и другие.

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Март 15, 2025

ABSTRACT Malaria in South America remains a serious public health problem. Anopheles ( Nyssorhynchus ) darlingi is the most important malaria vector across tropical Latin America. Vector-targeted disease control efforts require thorough understanding of mosquito demographic and evolutionary patterns. We present analyze whole genomes 1094 A. (median depth 18x) from six American countries. observe deep geographic population structure, high genetic diversity including thirteen putative segregating inversions, no evidence for cryptic sympatric taxa despite interpopulation divergence. Strong signals selection are plausibly driven by insecticides, especially on cytochrome P450 genes, one which we validated experimentally. Our results will facilitate effective surveillance control, while highlighting ongoing challenges that diverse poses elimination western hemisphere.

Язык: Английский

Процитировано

0
The biogeographic and genomic signatures of dynamic river networks for terrestrial species in Amazonia DOI
Lukas J. Musher

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2025, Номер unknown

Опубликована: Май 26, 2025

ABSTRACT Amazonia contains Earth's largest freshwater basin, contiguous stretch of tropical forest, and most species‐rich terrestrial biota on Earth. Rivers are key geographic features that drive diversification the Amazonian biota, but they also dynamic, which challenges their role as long‐term barriers to dispersal gene flow. The impacts such river dynamics organismal evolution have only recently been explored in detail. Here I examine biodiversity patterns processes elucidate how taxa diversify context network dynamics. borrow River Capture Hypothesis from ichthyology, draw evidence speciation genomics, hybrid zones, community assembly demonstrate effects biodiversification. idea is simple: populations organisms whose restricted by rivers become semi‐isolated rivers. Drift selection against introgression divergence, move, previously isolated come into secondary contact, facilitating lineage fusions or migration zones other basin's unique macroecological rich thus may resulted repeated divergences, fusions, range expansions around a non‐stationary extrinsic with variable results depending degree intrinsic reproductive isolation accumulates during this process. evolutionary consequences dynamic landscapes extend beyond “fission–fusion–fission” cycles modulate spatial patterning life Earth general.

Язык: Английский

Процитировано

0
Patterns of endemism and beta diversity in amphibians and reptiles of the Amazon Basin: effects of habitat heterogeneity and anthropic impact DOI
Jhon Jairo López‐Rojas, Mirco Solé, Ricardo Lourenço‐de‐Moraes

и другие.

Biological Journal of the Linnean Society, Год журнала: 2025, Номер 145(2)

Опубликована: Июнь 1, 2025

Abstract Identifying conservation priorities in ecological hotspots such as the Amazon Basin requires an understanding of beta diversity and endemism patterns. This study explores amphibian reptile across 32 Amazonian ecoregions, analysing their relationships with habitat heterogeneity anthropogenic impacts. Using spatial data for 1839 species, we calculated weighted its components (turnover nestedness). Habitat variables (water, bare ground, trees, flooded vegetation, rangeland) impact indicators (built areas crops) were derived from land cover data, regression models assessed effects on metrics. Our results reveal substantial variability western montane ecoregions exhibiting highest values. Beta diversity, driven primarily by turnover, was elevated Anura, Gymnophiona, lizards, snakes, reflecting regionally distinct species compositions. heterogeneity, particularly positively influenced both while caudates crocodilians showed lower sensitivity to variability. Anthropogenic impacts built contributed higher values most groups, whereas crops had minimal effects. These findings highlight Basin’s critical biodiversity high turnover. The dominance turnover over nestedness emphasizes unique compositions within each ecoregion. Targeted strategies are urgently needed mitigate urbanization prioritize preservation habitats endemism, ensuring long-term protection biodiversity.

Язык: Английский

Процитировано

0