博士 / 國立臺灣海洋大學 / 海洋生物研究所 / 101 / Kueishan Island (northeastern Taiwan) is an important deep-sea fishing ground and is famous for its unique hydrothermal vents that extend from shallow to deep waters. Decapod crustaceans are major components of economical species in the Kueishan Island fishing group and also the dominant species in the hydrothermal vent systems there. Multivariate analyses revealed significant differences in decapod crustacean species composition between the vent and non-vent regions. The results suggest that trawling disturbances may be the main factor causing the decapod crustacean community structure off the Kueishan Island waters being rather unstable. This is also the first report on the tropic level of the vent fauna in Taiwan. The trophic shift of Kueishan Island shallow and deep water hydrothermal vents were examined through stable C and N isotope. The deep water Kueishan Island hydrothermal vent is a chemoautotrophic system, with the vent mussel Bathymodiolus taiwanensis (associated with chemosynthetic bacteria) forms the basal part of this trophic system. Moreover, hydrothermal vents are supporting the principal food source for the deep-sea vent endemic shrimp Alvinocaris chelys and mud shrimp Nihonotrypaea thermophila. The deep-sea vent endemic crab Xenograpsus testudinatus and hermit crab Paragiopagurus ventilatus have a wide range of food source, with the latter having the major food source from general deep sea environment. The food source of the shallow-water vent X. testudinatus also varies from the vent and adjacent non-vent environment, but plankton is not its principal food source. Since Xenograpsus populations from both shallow and deep-water vents show large variations in stable isotope signatures (some individuals even with nitrogen values close to that of non-vent species), it is possible that X. testudinatus may transfer energy between the deep-sea hydrothermal vents and adjacent non-vent environment.
| Identifer | oai:union.ndltd.org:TW/101NTOU5270007 |
| Date | January 2013 |
| Creators | 王騰巍 |
| Contributors | Chan, Tin-Yam, Chan, Benny K. K., 陳天任, 陳國勤 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 201 |
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