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Pollination ecology of Hawaiian coastal plants

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Item Summary

Title:Pollination ecology of Hawaiian coastal plants
Authors:Shay, Kimberly Ruth
Keywords:Network connectance
Date Issued:Aug 2014
Publisher:[Honolulu] : [University of Hawaii at Manoa], [August 2014]
Abstract:Little is known regarding pollination webs involving island coastal plants and pollinators, and the roles that non-native flower visitors may play in these interaction networks. Plant-pollinator observations collected in March 2008 and 2009 were used to describe the pollination network for Kaʽena Point, one of Hawaii's best-conserved coastal communities. The network includes 15 native plant species, 2 native insect species, and 27 non-native insect taxa, forming 119 interactions. Network connectance is 29.4% and weighted nestedness is 18.3, which is similar to other dry habitat, island networks. The network's structure has a compartment of generalized pollinators followed by more specialized pollinators. Nearly all plant species interact with two or more generalist pollinators and a variable number of specialists. Small, non-native bees (Lassioglossum, Ceratina), wasps (Proconura), and flies (Tachinidae) were responsible for 71.6% of the flower visits and visit five plant species not visited by native bees. The two native visitors, Hylaeus anthracinus and H. longiceps, (both proposed as threatened/endangered) belong to a radiation of > 60 endemic species in Hawaii's only genus of native bees. Hylaeus spp. (especially females) provided 20.6% of the flower visits, foraging on many species and at high frequencies, including the endangered Scaevola coriacea and Sesbania tomentosa. In Hawaii's coastal habitat, non-native insects form novel interactions with native species, and can maintain an ecosystem's function after losing most of the original native species. However, the two remaining native Hylaeus species are still important pollinators to many native plants on which they rely for nectar and pollen resources.
Description:M.S. University of Hawaii at Manoa 2014.
Includes bibliographical references.
Rights:All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Appears in Collections: M.S. - Botany

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