National Taiwan Ocean University Institutional Repository:Item 987654321/52009
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题名: Community Metabolism in a Tropical Lagoon: Carbon Cycling and Autotrophic Ecosystem Induced by a Natural Nutrient Pulse
作者: Wei-Chun Hsieh
Chung-Chi Chen
Fuh-Kwo Shiah
Jia-Jang Hung
Kuo-Ping Chiang
Pei-Jie Meng
Kuo-Shuh Fan
贡献者: 國立臺灣海洋大學:海洋環境與生態研究所
关键词: bacterial biomass and production
community respiration
dissolved inorganic nutrients
particulate and dissolved organic carbon
primary production
日期: 2012
上传时间: 2019-01-11T06:47:56Z
出版者: ENVIRONMENTAL ENGINEERING SCIENCE
摘要: Abstract: This study is designated to examine the biological activity role of carbon cycling in a tropical lagoon, especially after a natural nutrient pulse. The study took place several days after precipitation. Both physical and chemical hydrographs indicated that significant amounts of dissolved inorganic nutrients had either entered the inner lagoon through runoff drainage or regenerated from the bottom sediments of the inner lagoon. Although the variables (chlorophyll a, bacterial biomass and production, as well as dissolved and particulate organic carbon) had orders of variation, linear relationships were significant between variables. This could have been associated with high phytoplankton growth enhanced by enriched nutrients and its sequential responses. This study considered both phytoplankton and bacterial communities that are the most important components of organic carbon consumption; they accounted for more than 87% of the organic carbon consumption in this ecosystem. A large ratio of primary production to community respiration with a mean of 1.33 suggested that this lagoon was autotrophic during the study period. It also indicated that there was a carbon sink in this ecosystem, and the residual carbon was either exported into the coastal sea or preserved in lagoon sediments resulting in the hypoxic condition of the bottom water. Faster water turnover rate was suggested to improve this low oxygen condition.
關聯: 29(8)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/52009
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