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Durham Research Online
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Multiple routes to interspecific territoriality in sister species of North American perching birds.

Cowen, M.C. and Drury, J.P. and Grether, G.F. (2020) 'Multiple routes to interspecific territoriality in sister species of North American perching birds.', Evolution., 74 (9). pp. 2134-2148.

Abstract

Behavioral interference between species can influence a wide range of ecological and evolutionary processes. Here we test foundational hypotheses regarding the origins and maintenance of interspecific territoriality, and evaluate the role of interspecific territoriality and hybridization in shaping species distributions and transitions from parapatry to sympatry in sister species of North American perching birds (Passeriformes). We find that interspecific territoriality is pervasive among sympatric sister species pairs, and that interspecifically territorial species pairs have diverged more recently than sympatric non‐interspecifically territorial pairs. None of the foundational hypotheses alone explains the observed patterns of interspecific territoriality, but our results support the idea that some cases of interspecific territoriality arise from misdirected intraspecific aggression while others are evolved responses to resource competition. The combination of interspecific territoriality and hybridization appears to be an unstable state associated with parapatry, while species that are interspecifically territorial and do not hybridize are able to achieve extensive fine‐ and coarse‐scale breeding range overlap. In sum, these results suggest that interspecific territoriality has multiple origins and impacts coexistence at multiple spatial scales.

Item Type:Article
Full text:Publisher-imposed embargo until 13 August 2021.
(AM) Accepted Manuscript
File format - PDF
(1241Kb)
Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1111/evo.14068
Publisher statement:This is the peer reviewed version of the following article: Cowen, M.C., Drury, J.P., & Grether, G.F. (2020). Multiple routes to interspecific territoriality in sister species of North American perching birds. Evolution, 74(9), 2134-2148., which has been published in final form at https://doi.org/10.1111/evo.14068. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Date accepted:20 July 2020
Date deposited:04 August 2020
Date of first online publication:13 August 2020
Date first made open access:13 August 2021

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