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  Stable isotopes predict reproductive performance of European starlings breeding in anthropogenic environments

Yohannes, E., Gwinner, H., Lee, R. W., & Schwabl, H. (2016). Stable isotopes predict reproductive performance of European starlings breeding in anthropogenic environments. Ecosphere, 7(11): e01566. doi:10.1002/ecs2.1566.

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 Creators:
Yohannes, Elizabeth1, Author              
Gwinner, Helga2, Author              
Lee, R. W., Author
Schwabl, Hubert3, Author              
Affiliations:
1Universität Konstanz, ou_persistent22              
2Abteilung Kempenaers, Seewiesen, Max Planck Institut für Ornithologie, Max Planck Society, ou_2149689              
3Washington State University Pullman, USA, ou_persistent22              

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 Abstract: Understanding reproductive performance in ecologically impoverished vs. more sustained anthropogenic habitats is critical to assess population health status and to develop land use and conservation management strategies. We compared resource-based maternal effects, reproductive performance, and offspring quality in a model migratory passerine bird, the European starling (Sturnus vulgaris). We assessed female condition, quantity of egg constituents, quality of diet consumed during egg formation, and nestling growth and survival in two habitats: cultivated farmland and meadows. Egg, albumin, and shell mass were greater at the meadow site, while yolk mass did not differ significantly between sites; albumin mass most strongly predicted egg mass. Stable isotope enrichment (delta N-15 and delta C-13) in yolk but not albumin suggests a broader range of diet for yolk formation at the meadow site but could also reflect different hydric conditions between sites. delta C-13 and delta N-15 enrichment did not predict yolk, albumin, or egg mass. Concentration of yolk testosterone was higher at the meadow site and correlated with delta C-13 enrichment in yolk. Nestling survival was higher in the meadow than in the farmland site and corresponded to egg mass and delta C-13 enrichment in lipid-free yolk. Surviving nestlings were larger in the meadow than in the farmland site. Results indicate that agricultural practice influences reproductive output through resource-based maternal effects. The analyses of isotopic and biochemical composition of small samples of yolk and albumin may provide a minimally invasive tool to assess individual reproductive performance and predict impacts of habitat quality on population health.

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 Dates: 2016-11-01
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: Other: WOS:000392207600038
DOI: 10.1002/ecs2.1566
Other: Immediate Open Access
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Title: Ecosphere
Source Genre: Journal
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Publ. Info: Ithaca, NY : Ecological Society of America
Pages: - Volume / Issue: 7 (11) Sequence Number: e01566 Start / End Page: - Identifier: ISSN: 2150-8925
CoNE: https://pure.mpg.de/cone/journals/resource/2150-8925