Caring for Pollinators - Bundesamt für Naturschutz

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Schuchmann Fact sheet pollinators: Avian pollinators: Hummingbirds, Sunbirds, Honeyeaters, Hawaiian Honeycreepers (Trochilidae,Nectariniidae, Meliphagidae, Carduelidae) Honeyeaters and pollinated crops No information available. Honeyeaters and biodiversity of wild plants The importance of honeyeaters for the pollination of native plants is not well documented. However, for some species of the families Myrtaceae, Proteaceae, and Loranthaceae, honeyeaters are obligate pollinators. IV. (Hawaiian) Honeycreepers Family Carduelidae Order Passeriformes Species number: Hawaiian islands only: 22; Number of genera: 17 Distribution Endemic to the Hawaiian Islands. All island habitats above 600 m asl (Pratt et al. 1987). Honeycreepers biology and pollination The ancestors of Hawaiian honeycreepers stem from Eurasian cardueline finches, most of them seedeaters. Hence it is not surprising that during their radiation on the oceanic islands of Hawaii distinct feeding habits gave raise to fairly defined groups. One group includes finches not very different from the thick billed seedeaters of other taxonmic groups. The second group includes an array of thin-billed mainly “green” birds of superficial similarity that feed on both nectar and insects. The third group comprises some of the most brightly coloured (red) long-billed nectar-feeders, that are strongly associated with the red-flowering ohia-lehua tree (Metrosideros collina). Nectar-feeding honeycreepers are extremely territorial. They aggressively defend their food sources against conspecifics and other nectarivores. When nectar is scarce many species feed on fruits and on foliage insects. The body mass of Hawaiian honey ranges from 8 – 40 g (Berger 1981). 175
Schuchmann Fact sheet pollinators: Avian pollinators: Hummingbirds, Sunbirds, Honeyeaters, Hawaiian Honeycreepers (Trochilidae,Nectariniidae, Meliphagidae, Carduelidae) Main flower preferences Besides the ohia tree (M. collina), lobeliads, such as the endemic Clermontia arborescens, as well as various introduced passiflora and banana species are the basic nectar source for most members of the nectarivorous guild (Scott et al. 1986). However, M. collina seems to be the dominant species pollinated by various Honeycreepers (e.g. Vestaria coccinea, Himatione sanguinea, Drepanis pacifica). Honeycreepers and pollinated crops Not known, but unlikely. Honeycreepers and biodiversity of wild plants Presuming for less than a dozen angiosperms Hawaiian honeycreepers are obligatory pollinators (Scott et al. 1986), a quite frequently observed phenomenon for plant populations occurring on subtropical or tropical oceanic islands. Authors' address: Prof. Dr. Karl-Ludwig Schuchmann, Zoologisches Forschungsmuseum Alexander Koenig, Abteilung Ornithologie, Adenauerallee 160, 53113 Bonn, Germany. Website: www.zfmk.de, E-Mail: kl.schuchmann.zfmk@uni-bonn.de. 176
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Caring for Pollinators Safeguarding
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Cover picture: Fruit basket with it
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Vorwort Blütenbestäuber nehmen ei
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L.E. NEWSTROM-LLOYD, J. COOPER, N.J
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Ssymank, Hamm, Vischer-Leopold & Wi
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Ssymank, Hamm, Vischer-Leopold & Wi
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Collette International Perspektive
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Dias The Brazilian Pollinators Init
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Roubik Small bees have a big job 2.
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Roubik Small bees have a big job Au
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Ssymank & Kearns Flies - Pollinator
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Ruggiero, Adams, Saraiva North and
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Gikungu, Hagen, Kraemer An overview
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Potts, Roberts, Kunin & Biesmeijer
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Steffan-Dewenter Pollinator decline
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Ssymank Highlights - Zusammenfassun
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Programme: 18:15 h Opening by AXEL
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Hamm & Ssymank Impressions of the s
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Caring for Pollinators - Bundesamt für Naturschutz

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