Journal of Ornithology

, Volume 159, Issue 2, pp 565–569 | Cite as

Bird seasonal beta-diversity in the contiguous USA

Short Communication

Abstract

Beta-diversity, the measurement of community changes along gradients, is an important component of diversity, and is needed to understand how local communities are assembled from a regional pool. Although they have rarely been quantified, seasonal changes in species composition have important management implications, as they can hamper the representativeness of snapshot community studies. The present study thus maps bird seasonal changes in species composition (beta-diversity) across the contiguous USA, using weekly data from the eBird project. Besides management implications, this map also provides insights into the mechanisms driving seasonal beta-diversity, namely that it is mostly related to the annual temperature range and the size of the species pool.

Keywords

Seasonality Turnover Migration Annual temperature range 

Zusammenfassung

Saisonale Beta-Diversität von Vögeln in den kontinentalen Vereinigten Staaten

Als Maß für die Veränderung von Artengemeinschaften entlang von Gradienten ist die Beta-Diversität eine bedeutende Komponente der Biodiversität, die zum Verständnis dafür notwendig ist, wie sich lokale Gemeinschaften aus einem regionalen Pool zusammenfügen. Wenngleich selten quantifiziert, haben saisonale Veränderungen in der Artenzusammensetzung wichtige Konsequenzen für Managemententscheidungen, da sie den Repräsentationsgrad von Momentaufnahmen der Artengemeinschaft verringern können. In der vorliegenden Arbeit kartieren wir daher die saisonalen Veränderungen in der Artenzusammensetzung (Beta-Diversität) über die kontinentalen Vereinigten Staaten unter Verwendung der wöchentlichen Daten aus dem eBird-Projekt. Abgesehen von Konsequenzen für Managemententscheidungen liefert diese Karte auch Einsichten in die Mechanismen, die die saisonale Beta-Diversität antreiben. Sie ist überwiegend bestimmt von der jährlichen Schwankungsbreite der Temperatur und der Größe des Artenpools.

Notes

Acknowledgements

Thanks to Raphaël Proulx, Alison Johnston, Mark W. Miller and one anonymous reviewer whose comments and suggestions have greatly improved this manuscript. I would also like to thank the thousands of eBird contributors, without whom none of this important data would have been available. Finally, the author acknowledges a grant from the Natural Sciences and Engineering Research Council of Canada.

Data availability

The dataset generated and analyzed during the current study, along with the necessary computer code, are available in the FigShare repository, https://figshare.com/s/03ff57351ee71a8a3ce7.

Supplementary material

10336_2017_1525_MOESM1_ESM.pdf (166 kb)
Online Resource 1. Exploring the gamma:alpha ratio along a latitude gradient (ESM1.pdf) (PDF 165 kb)

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Copyright information

© Dt. Ornithologen-Gesellschaft e.V. 2017

Authors and Affiliations

  1. 1.Chaire de recherche du Canada en Intégrité ÉcologiqueUniversité du Québec à Trois-RivièresTrois-RivièresCanada

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