Signals of local adaptation across an environmental gradient among highly connected populations of the Dead Sea Sparrow Passer moabiticus in Israel

Tali Magory Cohen, Ron Haran, Roi Dor

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

Populations found at the edge of a species range often have decreased genetic diversity, which together with high gene flow may reduce the ability of a species to adapt to local environmental conditions. The Dead Sea Sparrow Passer moabiticus occupies a disjointed range, where the Israeli populations are considered peripheral and fragmented. The species is also thought to have undergone a recent range expansion. We aimed to describe the genetic and morphological variation of the Israeli populations and to determine the extent of gene flow among them. We expected that because of the small latitudinal gradient across Israel and the recent range expansion of the species that Dead Sea Sparrow populations would show no significant morphological adaptation to local environmental conditions, and that considerable gene flow would be taking place among populations. Our findings indicate the existence of gene flow, suggesting high connectivity among populations, but recovered no support for a recent range expansion, possibly due to insufficient time since expansion for mutations to have accumulated. However, despite recurrent gene flow among populations, latitudinal variation in wing length (male and female) and body mass (male) was indicative of local adaptation across Israel, in accordance with Bergmann's rule.

שפה מקוריתאנגלית
עמודים (מ-עד)619-631
מספר עמודים13
כתב עתIbis
כרך161
מספר גיליון3
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 1 יולי 2019
פורסם באופן חיצוניכן

הערה ביבליוגרפית

Publisher Copyright:
© 2018 British Ornithologists' Union

טביעת אצבע

להלן מוצגים תחומי המחקר של הפרסום 'Signals of local adaptation across an environmental gradient among highly connected populations of the Dead Sea Sparrow Passer moabiticus in Israel'. יחד הם יוצרים טביעת אצבע ייחודית.

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