Spatial and temporal dynamics in abundance and productivity of intertidal seagrasses and the ecological niche in Kenting / 墾丁潮間帶海草豐度與生產力之時空變化及空間生態區位差異

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.

Identiferoai:union.ndltd.org:TW/091NCHU0105016
Date January 2003
CreatorsLan Chiu Yueh, 藍秋月
ContributorsLin Hsing Juh, 林幸助
Source SetsNational Digital Library of Theses and Dissertations in Taiwan
Languagezh-TW
Detected LanguageEnglish
Type學位論文 ; thesis
Format100

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