Is the Medium the Message? Functional Diversity Across Abiotic Gradients in Freshwater Electric Fishes

Integrative and Comparative Biology, Journal Year: 2022, Volume and Issue: 62(4), P. 945 - 957

Published: March 25, 2022

Evolutionary transitions across abiotic gradients can occur among habitats at multiple spatial scales, and taxa biotas through a range of ecological evolutionary time frames. Two diverse groups electric fishes, Neotropical Gymnotiformes, Afrotropical Mormyroidea, offer interesting examples potentially convergent evolution in aspects morphological, physiological, life history traits. We examined biogeographical, functional patterns these two to assess the degree convergence association with environmental variables. While there are superficial similarities continents, we found substantially more differences terms habitat occupancy, signal diversity, morphological disparity. These likely correlate biogeographical histories Neotropics Afrotropics, biotic factors associated aquatic signals, sampling issues plaguing both groups. Additional research required make further inferences about how fishes transition throughout freshwater microevolutionary macroevolutionary scales.

Language: Английский

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Amazonian avian biogeography: Broadscale patterns, microevolutionary processes, and habitat-specific models revealed by multidisciplinary approaches

Ornithology, Journal Year: 2023, Volume and Issue: 141(1)

Published: Nov. 24, 2023

Abstract Our understanding of Amazonian biogeography is quickly increasing, catalyzed by the growing use genomic datasets, improved knowledge species distributions, and accumulation new data on geological climatic history region. The high number in Amazonia their intricate patterns geographic distribution triggered development many diversification hypotheses that shaped historical as a discipline. Here, we present overview avian biogeographic studies Amazonia, recent advances, outstanding questions, future directions. We focus how approaches have led to novel understandings processes underpin diversity. show tools are being used establish about drivers highlight importance birds previously overlooked environments, such floodplains open vegetation enclaves. emphasize gene flow, traits, habitat affinities studying fully acknowledge complexity ecosystems history. then discuss current gaps taxonomic knowledge, with issues believe hinder our field. has been facing increasing levels forest loss due agricultural expansion, infrastructure development, mining, climate change, illegal activities weak governance. To halt biodiversity loss, it crucial increase natural species. suggest incentives for research training at institutions based region, well establishment partnerships governments, local communities, NGOs, international bring diverse communities together address questions.

Language: Английский

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Drainage Reorganization and Intraspecific Genetic Diversity of Riverine Fish: Insights from the Ligurian Alps and Northern Apennines via Environmental DNA Metabarcoding

Authorea (Authorea), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 24, 2024

Mountain building reorganizes drainage networks, influencing riverine biodiversity. Northern Italy offers a natural experiment in the impact of tectonic and geomorphic processes on aquatic species distributions. We combined analysis with environmental DNA from rivers to assess influence tectonically driven reorganization genetic diversity, targeting an endemic fish species, Telestes muticellus (A. Risso, 1827). In Apennines, horizontal shortening topographic advection orogenic wedge have been hypothesized as leading river capture divide migration. addition, slab rollback has produced spatial transition contraction extension, which is more pronounced north south, normal faulting producing range-parallel only southern regions. contrast, adjacent Ligurian Alps are remnant Alpine orogen little modern deformation. found distinct zones characteristics including asymmetry frequency drainage. Analysis sequences shows cross-divide assemblage that correlate zonation. The Apennines show higher values directional measures change gain, loss, turnover; overlap nestedness. There positive correlation between distance, turnover Adriatic sites; there negative Since confined freshwater environments, one mechanisms can explain its differentiation.

Language: Английский

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Orinoco

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 93 - 152

Published: Oct. 11, 2024

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River network rearrangements promote speciation in lowland Amazonian birds

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2021, Volume and Issue: unknown

Published: Nov. 16, 2021

Abstract Large Amazonian rivers impede dispersal for many species, but lowland river networks frequently rearrange, thereby altering the location and effectiveness of river-barriers through time. These rearrangements may promote biotic diversification by facilitating episodic allopatry secondary contact among populations. We sequenced genome-wide markers to evaluate histories divergence introgression in six avian species-complexes. first tested assumption that are barriers these taxa found even relatively small facilitate divergence. then whether species diverged with gene flow recovered reticulate all including one potential case hybrid speciation. Our results support hypothesis dynamics speciation reveal rainforest micro-endemic, unrecognized thus threatened imminent extinction. propose hyper-diversity originates part from fine-scale barrier displacement processes –including dynamics– which allow populations differentiate disperse into contact.

Language: Английский

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