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Pollination Energetics and Foraging Strategies in a Metrosideros-Honeycreeper Association

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dc.contributor.author Carpenter, F Lynn
dc.contributor.author MacMillen, Richard E.
dc.date.accessioned 2013-12-11T22:59:06Z
dc.date.available 2013-12-11T22:59:06Z
dc.date.issued 1975-05
dc.identifier.citation Carpenter FL, MacMillen RE. 1975. Pollination energetics and foraging strategies in a Metrosideros-honeycreeper association. Honolulu (HI): Island Ecosystems IRP, U.S. International Biological Program. International Biological Program Technical Report, 63. 9 pages.
dc.identifier.uri http://hdl.handle.net/10125/31014
dc.description Reports were scanned in black and white at a resolution of 600 dots per inch and were converted to text using Adobe Paper Capture Plug-in.
dc.description.abstract Evidence suggests that birds, specifically certain nectar-eating species of Drepanididae, are necessary for proper pollination, outcrossing, and high levels of seed set in Metrosideros collina on the island of Hawaii. Selection pressures acting upon the honeycreeper-M. collina association in the Keauhou Ranch forests on Mauna Loa fluctuate through the year. At the peak of the M. collina blooming season in late spring, nectar is relatively abundant to the honeycreepers, which means that the most important pollinators are potentially limiting to M. collina. Resultant intraspecific competition has selected for high rates of nectar secretion to attract pollinators; a ceiling in the population has been placed on these rates by the fact that seed set declines at very high flow rates, apparently because of decreased outcrossing due to pollinator sedentariness in such trees. At other times of the year when M. collina flowers are less abundant, a surplus of pollinators occurs, which results in high levels of seed set but in competition for food among the nectar-eaters. Loxops virens, and also Himatione sanguinea to a lesser extent, can turn to insectivory under these circumstances and therefore need not possess a highly specialized and efficient nectar-foraging strategy, but the more nectar-dependent Vestiaria sanguinea establishes interspecifically:defended territories in M. collina and visits flowers on its territory in a timed sequence. An hierarchy of interspecific aggression seems to be aligned among the three honeycreeper species in order of degree of nectar dependency.
dc.description.sponsorship Supplementary funding for the extensible ladder and field assistance was provided by a grant from the American Philosophical Society to Carpenter. We wish to thank the Primo Foundation for its continued support, and also acknowledge impetus added by the Lucky Draft Association.
dc.format.extent 9 pages
dc.language.iso en-US
dc.publisher Island Ecosystems IRP, U.S. International Biological Program
dc.relation.ispartofseries International Biological Program Technical Report
dc.relation.ispartofseries 63
dc.rights CC0 1.0 Universal
dc.rights.uri http://creativecommons.org/publicdomain/zero/1.0/
dc.subject Metrosideros collina
dc.subject Drepanididae
dc.subject.lcsh Metrosideros -- Hawaii -- Hawaii Island.
dc.subject.lcsh Hawaiian honeycreepers -- Behavior.
dc.subject.lcsh Ohia-lehua.
dc.subject.lcsh Metrosideros -- Pollination.
dc.title Pollination Energetics and Foraging Strategies in a Metrosideros-Honeycreeper Association
dc.type Report
dc.type.dcmi Text
Appears in Collections: International Biological Program Technical Reports (1970-1975)


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