Details

Autor(en) / Beteiligte

• Taylor, Scott A.
• White, Thomas A.
• Hochachka, Wesley M.
• Ferretti, Valentina
• Curry, Robert L.
• Lovette, Irby

Titel

Climate-Mediated Movement of an Avian Hybrid Zone

Ist Teil von

• Current biology, 2014-03, Vol.24 (6), p.671-676

Ort / Verlag

England: Elsevier Inc

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• The interaction between sibling species that share a zone of contact is a multifaceted relationship affected by climate change [1, 2]. Between sibling species, interactions may occur at whole-organism (direct or indirect competition) or genomic (hybridization and introgression) levels [3–5]. Tracking hybrid zone movements can provide insights about influences of environmental change on species interactions [1]. Here, we explore the extent and mechanism of movement of the contact zone between black-capped chickadees (Poecile atricapillus) and Carolina chickadees (Poecile carolinensis) at whole-organism and genomic levels. We find strong evidence that winter temperatures limit the northern extent of P. carolinensis by demonstrating a current-day association between the range limit of this species and minimum winter temperatures. We further show that this temperature limitation has been consistent over time because we are able to accurately hindcast the previous northern range limit under earlier climate conditions. Using genomic data, we confirm northward movement of this contact zone over the past decade and highlight temporally consistent differential—but limited—geographic introgression of alleles. Our results provide an informative example of the influence of climate change on a contact zone between sibling species. •Chickadee hybrid zone has moved north 11.5 km over the past decade•Climate change may be facilitating the northward movement of the hybrid zone•Minimum winter temperature accurately predicts historical location of contact zone•Minimum winter temperatures have increased over the past decade Taylor et al. use time-separated genomic samples, eBird distribution data, and PRISM climate data to document the extent (11.5 km northward) and mechanism (climate change) of movement of the black-capped/Carolina chickadee hybrid zone over the past decade.