Life history traits and dispersal shape neutral genetic diversity in metapopulations

Garnier, Jimmy; Lafontaine, P.O.

doi:10.1007/s00285-022-01749-9

Cited by 4 publications

(1 citation statement)

References 44 publications

(58 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We addressed two specific objectives: (1) Investigate environmental and spatial relationships by modelling H E as a function of the following variables, while also accounting for sample size: latitude, longitude, mean annual temperature, annual precipitation, temperature annual range, net primary productivity and elevation. (2) Assess taxa‐specific patterns to account for differences among taxonomic groups, as different clade history and life histories may lead to differences in genetic and/or latitudinal patterns among groups (Adams & Hadly, 2013; De Kort et al, 2021; DeWoody & Avise, 2000; Garnier & Lafontaine, 2022; Martinez et al, 2018; Miraldo et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Macrogenetics reveals multifaceted influences of environmental variation on vertebrate population genetic diversity across the Americas

2023

View full text Add to dashboard Cite

The broad scale distribution of population-specific genetic diversity (GD P ) across taxa remains understudied relative to species diversity gradients, despite its relevance for systematic conservation planning. We used nuclear DNA data collected from 3678 vertebrate populations across the Americas to assess the role of environmental and spatial variables in structuring the distribution of GD P , a key component of adaptive potential in the face of environmental change. We specifically assessed non-linear trends for a metric of GD P, expected heterozygosity (H E ), and found more evidence for spatial hotspots and cold spots in H E rather than a strict pattern with latitude. We also detected inconsistent relationships between H E and environmental variables, where only 11 of 30 environmental comparisons among taxa groups were statistically significant at the .05 level, and the shape of significant trends differed substantially across vertebrate groups. Only one of six taxonomic groups, freshwater fishes, consistently showed significant relationships between H E and most (four of five) environmental variables. The remaining groups had statistically significant relationships for either two (amphibians, reptiles), one (birds, mammals), or no variables (anadromous fishes).Our study highlights gaps in the theoretical foundation upon which macrogenetic predictions have been made thus far in the literature, as well as the nuances for assessing broad patterns in GD P among vertebrate groups. Overall, our results suggest a disconnect between patterns of species and genetic diversity, and underscores that largescale factors affecting genetic diversity may not be the same factors as those shaping taxonomic diversity. Thus, careful spatial and taxonomic-specific considerations are needed for applying macrogenetics to conservation planning.

show abstract

Section: Introductionmentioning

confidence: 99%

Macrogenetics reveals multifaceted influences of environmental variation on vertebrate population genetic diversity across the Americas

2023

View full text Add to dashboard Cite

show abstract

Population status and genetic assessment of mugger (Crocodylus palustris) in a tropical regulated river system in North India

Sharma,

Ghazi,

Katdare

et al. 2024

Sci Rep

View full text Add to dashboard Cite

For rewilding the depleted crocodylian populations in India, a targeted ‘one-species one area’ based conservation approach was adopted in the early-1970s. Suitable habitats were identified and designated as protected areas, specifically targeted to recover a particular crocodylian species. A ~ 610 km stretch of Chambal River in the Ganga River Basin was declared as National Chambal Sanctuary to restore the ‘Critically Endangered’ gharial (Gavialis gangeticus), where active management of mugger (Crocodylus palustris) was discouraged. In the present study, we examined the population trends, occupancy, and genetic status of mugger by conducting population monitoring and genetic assessment to understand the status of potentially competitive mugger in the Sanctuary. Our finding suggests that the mugger population has notably increased and colonised the Sanctuary. We observed a moderate level of genetic diversity in the mugger, which was relatively higher compared to the gharial in the Sanctuary. The rapid colonization of ecological generalist mugger raises concerns about potential competition with ecological specialist gharial threatening its long-term sustainability. Considering the coexistence dynamics between the species, it is essential to extend adaptive management strategies for mugger to ensure successful recovery of gharial population in the Sanctuary.

show abstract

The influence of fragmented landscapes on speciation

Ciccheto,

Carnaval,

Araujo

2024

Journal of Evolutionary Biology

View full text Add to dashboard Cite

In the face of unprecedented global transformations, unraveling the intricate mechanisms governing biodiversity patterns is imperative for predicting and interpreting species responses. An important element in this interplay is fragmentation and the spatial mosaic or arrangement of suitable sites within the landscape. Beyond its well-documented impact on biodiversity loss, fragmented landscapes also influence the origin of biodiversity, by influencing speciation dynamics. This research employs a model that integrates spatial configuration and dispersal abilities of individuals to investigate the impact of landscape configuration on species’ evolutionary trajectories. Specifically, we propose a microevolutionary model where individuals are characterized by their dispersal ability and a genome, allowing population evolution and diversification. Space is explicitly characterized by suitable and unsuitable sites that define fragmented landscapes. Our model demonstrates how intermediate dispersal abilities enhance diversification. However, simulations of more fragmented landscapes result in a lower total number of individuals and a lower percentage of occupied sites by individuals, particularly when species have limited dispersal abilities. Furthermore, we have found that intermediate levels of fragmentation can stimulate greater species richness, while higher levels of speciation and extinction events tend to occur under higher fragmentations. Our results also show a non-monotonic dependence of richness on dispersal, supporting the intermediate dispersal hypothesis as promotor of diversification, demonstrating the synergistic effects of landscape configuration and species dispersal ability in the processes of speciation, extinction, and diversification. This impact of fragmentation poses a real challenge for biodiversity in the context of a dynamic world.

show abstract

Life history traits and dispersal shape neutral genetic diversity in metapopulations

Cited by 4 publications

References 44 publications

Macrogenetics reveals multifaceted influences of environmental variation on vertebrate population genetic diversity across the Americas

Macrogenetics reveals multifaceted influences of environmental variation on vertebrate population genetic diversity across the Americas

Population status and genetic assessment of mugger (Crocodylus palustris) in a tropical regulated river system in North India

The influence of fragmented landscapes on speciation

Contact Info

Product

Resources

About