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Mapping differences in mammalian distributions and diversity using environmental DNA from rivers

Broadhurst, HA; Gregory, LM; Bleakley, EK; Perkins, JC; Lavin, JV; Bolton, P; Browett, S; Howe, CV; Singleton, N; Tansley, D; Guimarães Sales, N; McDevitt, A

Mapping differences in mammalian distributions and diversity using environmental DNA from rivers Thumbnail


Authors

LM Gregory

EK Bleakley

JC Perkins

JV Lavin

P Bolton

S Browett

CV Howe

N Singleton

D Tansley

N Guimarães Sales

A McDevitt



Contributors

S Sabater
Editor

Abstract

Finding more efficient ways to monitor and estimate the diversity of mammalian communities is a major step towards their management and conservation. Environmental DNA (eDNA) from river water has recently been shown to be a viable method for biomonitoring mammalian communities. Most of the studies to date have focused on the potential for eDNA to detect individual species, with little focus on describing patterns of community diversity and structure. Here, we first focus on the sampling effort required to reliably map the diversity and distribution of semi-aquatic and terrestrial mammals and allow inferences of community structure surrounding two rivers in southeastern England. Community diversity and composition was then assessed based on species richness and β-diversity, with differences between communities partitioned into nestedness and turnover, and the sampling effort required to rapidly detect semi-aquatic and terrestrial species was evaluated based on species accumulation curves and occupancy modelling. eDNA metabarcoding detected 25 wild mammal species from five orders, representing the vast majority (82%) of the species expected in the area. The required sampling effort varied between orders, with common species (generally rodents, deer and lagomorphs) more readily detected, with carnivores detected less frequently. Measures of species richness differed between rivers (both overall and within each mammalian order) and patterns of β-diversity revealed the importance of species replacement in sites within each river, against a pattern of species loss between the two rivers. eDNA metabarcoding demonstrated its capability to rapidly detect mammal species, allowing inferences of community composition that will better inform future sampling strategies for this Class. Importantly, this study highlights the potential use of eDNA data for investigating mammalian community dynamics over different spatial scales.

Citation

Broadhurst, H., Gregory, L., Bleakley, E., Perkins, J., Lavin, J., Bolton, P., …McDevitt, A. (2021). Mapping differences in mammalian distributions and diversity using environmental DNA from rivers. Science of the Total Environment, 801, 149724. https://doi.org/10.1016/j.scitotenv.2021.149724

Journal Article Type Article
Acceptance Date Aug 13, 2021
Online Publication Date Aug 18, 2021
Publication Date Dec 20, 2021
Deposit Date Aug 31, 2021
Publicly Available Date Aug 18, 2022
Journal Science of the Total Environment
Print ISSN 0048-9697
Electronic ISSN 1879-1026
Publisher Elsevier
Volume 801
Pages 149724
DOI https://doi.org/10.1016/j.scitotenv.2021.149724
Publisher URL https://doi.org/10.1016/j.scitotenv.2021.149724
Related Public URLs https://www.journals.elsevier.com/science-of-the-total-environment

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