The rapid loss of intraspecific variation is a hidden biodiversity crisis. Intraspecific variation, which includes the genomic and phenotypic diversity found within and among populations, is threatened by local extinctions, abundance declines, and anthropogenic selection. However, biodiversity assessments often fail to highlight this loss of diversity within species. We review the literature on how intraspecific variation supports critical ecological functions and nature’s contributions to people (NCP). Results show that the main categories of NCP (material, non-material, and regulating) are supported by intraspecific variation. We highlight new strategies that are needed to further explore these connections and to make explicit the value of intraspecific variation for NCP. These strategies will require collaboration with local and Indigenous groups who possess critical knowledge on the relationships between intraspecific variation and ecosystem function. New genomic methods provide a promising set of tools to uncover hidden variation. Urgent action is needed to document, conserve, and restore the intraspecific variation that supports nature and people. Thus, we propose that the maintenance and restoration of intraspecific variation should be raised to a major global conservation objective.
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An initial research meeting to launch the paper was funded by the European Institute for Marine Studies’ International Chair for Marine Ecosystem Services through the French Agency for National Research’s Investissements d’avenir ISblue (ANR-17-EURE-0015) and the LabexMER (//ANR/-/-10/-/LABX/-/19). S.D. was funded by the University of California Office of the President grant for the Institute for the Study of Ecological and Evolutionary Climate Impacts. E.P.P. was partially supported by the NOAA Cooperative Institute for Marine Ecosystems and Climate. We thank members of the Palkovacs lab, the Leaché lab, and the Urban Eco Evo Research Coordination Network for important conversations on the manuscript.
The authors declare no competing interests.
Peer review information Nature Ecology & Evolution thanks Andrew Gonzalez and Assaf Shwartz for their contribution to the peer review of this work.
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I. Search terms for literature review. II. References for Fig. 2.
Summary of primary literature from Web of Science search where intraspecific variation is studied in species that provide an NCP. This table includes both studies that measured the relationship between intraspecific variation and NCP, and those that only quantified intraspecific variation in a species that provided an NCP as articulated by the original authors. NCP categorizations were made by S.D. based on terms used by the original authors.
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Des Roches, S., Pendleton, L.H., Shapiro, B. et al. Conserving intraspecific variation for nature’s contributions to people. Nat Ecol Evol (2021). https://doi.org/10.1038/s41559-021-01403-5