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Life history, climate and biogeography interactively affect worldwide genetic diversity of plant and animal populations.

ABSTRACT: Understanding how biological and environmental factors interactively shape the global distribution of plant and animal genetic diversity is fundamental to biodiversity conservation. Genetic diversity measured in local populations (GD_P) is correspondingly assumed representative for population fitness and eco-evolutionary dynamics. For 8356 populations across the globe, we report that plants systematically display much lower GD_P than animals, and that life history traits shape GD_P patterns both directly (animal longevity and size), and indirectly by mediating core-periphery patterns (animal fecundity and plant dispersal). Particularly in some plant groups, peripheral populations can sustain similar GD_P as core populations, emphasizing their potential conservation value. We further find surprisingly weak support for general latitudinal GD_P trends. Finally, contemporary rather than past climate contributes to the spatial distribution of GD_P, suggesting that contemporary environmental changes affect global patterns of GD_P. Our findings generate new perspectives for the conservation of genetic resources at worldwide and taxonomic-wide scales.

SUBMITTER: De Kort H

PROVIDER: S-EPMC7822833 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Life history, climate and biogeography interactively affect worldwide genetic diversity of plant and animal populations.

De Kort H H Prunier J G JG Ducatez S S Honnay O O Baguette M M Stevens V M VM Blanchet S S

Nature communications 20210122 1

Understanding how biological and environmental factors interactively shape the global distribution of plant and animal genetic diversity is fundamental to biodiversity conservation. Genetic diversity measured in local populations (GD<sub>P</sub>) is correspondingly assumed representative for population fitness and eco-evolutionary dynamics. For 8356 populations across the globe, we report that plants systematically display much lower GD<sub>P</sub> than animals, and that life history traits shap ...[more]

PMID: 33483517

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Project description:BACKGROUND:Rhizosphere microbial communities are key regulators of plant performance, yet few studies have assessed the impact of different management approaches on the rhizosphere microbiomes of major crops. Rhizosphere microbial communities are shaped by interactions between agricultural management and host selection processes, but studies often consider these factors individually rather than in combination. We tested the impacts of management (M) and rhizosphere effects (R) on microbial community structure and co-occurrence networks of maize roots collected from long-term conventionally and organically managed maize-tomato agroecosystems. We also explored the interaction between these factors (M?×?R) and how it impacts rhizosphere microbial diversity and composition, differential abundance, indicator taxa, co-occurrence network structure, and microbial nitrogen-cycling processes. RESULTS:Host selection processes moderate the influence of agricultural management on rhizosphere microbial communities, although bacteria and fungi respond differently to plant selection and agricultural management. We found that plants recruit management-system-specific taxa and shift N-cycling pathways in the rhizosphere, distinguishing this soil compartment from bulk soil. Rhizosphere microbiomes from conventional and organic systems were more similar in diversity and network structure than communities from their respective bulk soils, and community composition was affected by both M and R effects. In contrast, fungal community composition was affected only by management, and network structure only by plant selection. Quantification of six nitrogen-cycling genes (nifH, amoA [bacterial and archaeal], nirK, nrfA, and nosZ) revealed that only nosZ abundance was affected by management and was higher in the organic system. CONCLUSIONS:Plant selection interacts with conventional and organic management practices to shape rhizosphere microbial community composition, co-occurrence patterns, and at least one nitrogen-cycling process. Reframing research priorities to better understand adaptive plant-microbe feedbacks and include roots as a significant moderating influence of management outcomes could help guide plant-oriented strategies to improve productivity and agroecosystem sustainability.

Dataset Information

Life history, climate and biogeography interactively affect worldwide genetic diversity of plant and animal populations.

Publications

Life history, climate and biogeography interactively affect worldwide genetic diversity of plant and animal populations.

Similar Datasets

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