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Abstract Detail

Reproductive Processes

Shay, Kimberly [1], Drake, Donald [2].

The pollination biology of the Hawaiian coastal vine Jacquemontia sandwicensis (Convolvulaceae).

As human impacts on island systems increase, so, too, does the importance of understanding native plant species’ life histories and population dynamics for plant conservation. Yet, surprisingly little is known about the reproductive ecology of many of Hawaii’s most common native plants.  We experimentally investigated the breeding system and observed pollinators of the native vine Jacquemontia sandwicensis (Convolvulaceae), a common plant in the coastal strand habitat. To evaluate the breeding system, field and lab experiments involving natural and hand pollination treatments were performed, as well as pollinator observations in three coastal sites on the southeast coast of Oʽahu. J. sandwicensis is a hermaphroditic species with a flexible, mixed mating system. High fruit set, seed set, and seed viability depend on pollen being deposited on the stigma by an active pollinator rather than a passive vector (wind or autogamy). However, this species still produces some seeds even in the absence of manipulation, suggesting it can reproduce when pollinators are absent or in low abundances. In the observed sites, this plant was visited by a variety of mostly non-native Hymenoptera (Apis mellifera and Lasioglossum spp.). Native Hylaeus anthracinus also visited flowers, but at a much lower frequency than the non-native pollinators. Non-native pollinators appear to be effective for J. sandwicensis, and could provide pollination services in the face of absent or declining native pollinators.

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1 - University of Hawaii at Manoa, Botany, 3190 Maile Way, Room 101, Honolulu, HI, 96822, USA
2 - University Of Hawaii, Botany Department, 3190 Maile Way, Honolulu, HI, 96822, USA

Jacquemontia sandwicensis
breeding system
native species
novel interactions.

Presentation Type: Oral Paper
Session: 30, Reproductive Processes
Location: Fort Worth Ballroom 7/Omni Hotel
Date: Tuesday, June 27th, 2017
Time: 2:30 PM
Number: 30004
Abstract ID:126
Candidate for Awards:None

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