Global patterns of interaction specialization in bird-flower networks
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منابع مشابه
analyzing patterns of classroom interaction in efl classrooms in iran
با به کار گیری روش گفتما ن شنا سی در تحقیق حا ضر گفتا ر میا ن آموزگا را ن و زبا ن آموزا ن در کلا سهای زبا ن انگلیسی در ایرا ن مورد بررسی قرار گرفت. ا هداف تحقیق عبا رت بودند از: الف) شنا سا ئی سا ختارهای ارتبا ط گفتا ری میا ن معلمین و زبا ن آموزا ن ب) بررسی تا ثیر نقش جنسیت دبیرا ن و زبا ن آموزان بر سا ختا رهای ارتبا ط گفتا ری میا ن آنها پ) مشخص کردن اینکه آ یا آموزگاران غا لب بر این ارتبا ط گف...
Global patterns of specialization and coexistence in bird assemblages
Methods We use two indices of specialization that describe species-level resource use: diet and habitat specialization. The relationship between richness and mean assemblage-level specialization was independently assessed at realm, biome-realm, 12,100 km equal-area grid cells and fine-grained scales. To identify assemblages that are diverse relative to environmental conditions we: (1) applied q...
متن کاملBird-flower visitation networks in the Galápagos unveil a widespread interaction release.
Owing to food scarcity and to the high densities that vertebrates often reach on islands, typical insect- and seed-eaters widen their feeding niche and interact with a greater fraction of species than their mainland counterparts. This phenomenon, coined here 'interaction release', has been previously reported for single species but never for an entire community. During 4 years, we gathered data...
متن کاملSpecies abundance patterns and the distribution of specialization in host–parasite interaction networks
1 National Center for Ecological Analysis and Synthesis, University of California, 735 State St., Suite 300, Santa Barbara, CA 93101, USA. E-mail: [email protected]; phone: +1-805-892-2522; fax: +1-805-892-2510. 2 Centre d'Ecologie Fonctionnelle et Evolutive, U.M.R. 5175, 1919 Route de Mende, F34293 Montpellier Cedex 5, France. 3 Department of Zoology, University of Otago, P.O. Box 56, Dun...
متن کاملBird–flower interactions in the Macaronesian islands
Aims Several bird-pollinated or ornithophilous flowers are present on the Macaronesian archipelagos, the Canary Islands and Madeira, but absent from nearby NW Africa and Europe. In Macaronesia, no specialist nectar-feeding birds are found, but several generalist passerine bird species visit flowers for nectar. Two hypotheses attempt to explain the origin and evolution of ornithophily in the Mac...
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ژورنال
عنوان ژورنال: Journal of Biogeography
سال: 2017
ISSN: 0305-0270
DOI: 10.1111/jbi.13045