碩士 / 國立中興大學 / 生命科學系 / 91 / Seasonal and spatial variation in the abundance and leaf productivity of tropical seagrass Thalassia hemprichii was studied in the Kenting National Park. T. hemprichii growing on intertidal reef flats was monitored quarterly from February 2001 to April 2003. Because the height of seagrass bed may influence the abundance and productivity, the habitats were divided into three types based on the exposure time: high bed, low bed, and pool. The aims of this study were to explore difference of T. hemprichii among different habitats, to monitor the seasonal changes, and to find out the most important environmental factor influencing T. hemprichii. Results show that there were significance seasonal and spatial variation in the abundance and leaf productivity of T. hemprichii. They appears to be dependent on the length of exposure time. Where exposure time was longer, shoot coverage, density, below ground biomass, the R/S ratio were greater, but leaf became shorter and growth rate was slower. Among the four seasons growth rate and above-ground biomass were the lowest in winter. Speraman correlations between biotic and environmental parameters indicate that the biotic variable of seagrass correlated negatively with wind speed, salinity, silt/clay content, sorting coefficient, water DIN and DIP, and correlated positively with water temperature, sediment depth, and water DIN and DIP. Canonical correlation analyses indicate that water temperature and water DIN were the most important environmental factors influencing growth rate and above-ground biomass, while secondarily sorting coefficient and grain size were the most important environment factors influencing coverage.
| Identifer | oai:union.ndltd.org:TW/091NCHU0105016 |
| Date | January 2003 |
| Creators | Lan Chiu Yueh, 藍秋月 |
| Contributors | Lin Hsing Juh, 林幸助 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 100 |
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