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Alien Insects Dominate the Plant-Pollinator Network of a Hawaiian Coastal Ecosystem
- Pacific Science
- University of Hawai'i Press
- Volume 70, Number 4, October 2016
- pp. 409-429
- Article
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Little is known regarding pollination webs involving island coastal plants and pollinators, and roles that nonnative flower visitors may play in these interaction networks. Plant-pollinator observations made in March 2008 and 2009 were used to describe the pollination network for Ka‘ena Point, one of Hawai‘i’s best-conserved coastal communities. The network includes 15 native plant species, two native bee species, and 26 nonnative insect taxa, forming 119 interactions. Network connectance is 29.4% and weighted nestedness is 17.9, which are similar to values of other dry-habitat, island networks. The network’s structure has a core of generalized pollinators plus several more-specialized pollinators. Nearly all plant species interact with two or more generalist pollinators and a variable number of specialists. Small, nonnative bees (