The relative contributions of habitat area, configuration, and vegetative diversity on snake and lizard presence in agricultural landscapes

Author:

Stephenson Matthew D.1ORCID,Schulte Lisa A.1,Klaver Robert W.12

Affiliation:

1. Department of Natural Resource Ecology and Management Iowa State University Ames Iowa USA

2. U.S. Geological Survey Iowa Cooperative Fish and Wildlife Research Unit Ames Iowa USA

Abstract

AbstractNearly one in five reptile species is at risk of extinction. Changes in habitat area, its configuration, and vegetation diversity could affect habitat use, but their relative importance is understudied. We assessed how these factors affected reptile presence in agricultural landscapes figure in Iowa, United States, using 695 cover boards visited 16,441 times in 2015–2020. Species‐wise encounter rates ranged 0.0001–0.012. Eight of 11 species and 54.2% of individuals were species of greatest conservation need. Habitat area, configuration, and vegetation diversity influenced reptile presence similarly. Mean patch occupancy was 0.18 for common garter snake (CG, Thamnophis sirtalis) and 0.45 for all snakes (AS). Naïve presence was explained by effort (odds ratio [OR]AS = 1.83, ORCG = 1.79), vegetation diversity (ORAS = 1.28, ORCG = 1.28), woody cover (ORAS = 1.24, ORCG = 1.41), and patch size (ORAS = 1.30). Large patch prairies were more likely to contain snakes than other conservation practices (encounter = 0.291), and more likely to contain CG (0.098) than prairie contour strips (0.031), waterways (0.018), grass contour strips (0.016), or terraces (0.015). While we documented low overall reptile presence, their higher presence in large prairie patches underscores the importance of core nature reserves for reptile conservation.

Funder

National Institute of Food and Agriculture

Leopold Center for Sustainable Agriculture, Iowa State University

Iowa Department of Natural Resources

Publisher

Wiley

Reference59 articles.

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