陳仲吉劉妍莉Liu Yen-Li2019-09-052006-8-52019-09-052006http://etds.lib.ntnu.edu.tw/cgi-bin/gs32/gsweb.cgi?o=dstdcdr&s=id=%22GN0692430530%22.&%22.id.&http://rportal.lib.ntnu.edu.tw:80/handle/20.500.12235/104117本論文主要目的在瞭解東海南部海域群聚呼吸率的時空變化並探討影響其變異的主因。研究主要利用海研二號於2003年9月至2004年8月共計5個航次 (OR2-CR1135、OR2-CR1157、OR2-CR1170、OR2-CR1187、OR2-CR1213)，進行採樣與研究調查。研究結果顯示，東海南部海域群聚呼吸率的變化範圍介於6.28 ~ 281.14 mg C m-3 d-1之間，平均值為57.88 ± 50.3 mg C m-3 d-1。在空間變化上，靠近大陸沿岸的測站有較高的群聚呼吸率 (87.03 ± 42.13 mg C m-3 d-1)，此呼吸率往陸棚邊緣有逐漸遞減的趨勢 (34.34 ± 15.91 mg C m-3 d-1)，造成此差異的主因在於靠近大陸沿岸的測站，其葉綠素a濃度及異營性細菌生產力皆高於陸棚邊緣的測站。就季節性變化而言，群聚呼吸率在春季有最高值 (78.91± 67.89 mg C m-3 d-1)，其值在冬季最低 (29.4 ± 17.4 mg C m-3 d-1)，主要受到顆粒性有機碳、異營細菌生物量及其生產力、和葉綠素a濃度等季節性變異的影響。就個別水團的季節性變化趨勢而言，大陸沿岸水的群聚呼吸率主要受到顆粒性有機碳和葉綠素a濃度的季節性變化所控制；就台灣海峽水而言，群聚呼吸率的季節性變化以異營性細菌為主要的貢獻者；就黑潮水而言，影響其群聚呼吸率的因子主要為異營性細菌及浮游植物生物量的多寡。Abstract The objectives of this thesis are to understand the spatial and temporal variations of planktonic community respiration (i.e., PCR) in the southern East China Sea (ECS) and to explore the potential factors that impact on PCR. Samples were collected on board R/V Ocean Researcher II during Sept., 2003 to Aug., 2004 along the transect stations from the China coast to continental margin in the southern ECS. Results showed that PCR were in the range of 6.28 ~ 281.14 mg C m-3 d-1 with the averaged rate of 57.88 ± 50.3 mg C m-3 d-1. Spatially, the highest PCR was observed at stations in the China coastal waters (CCW; average value = 87.03 ± 42.13 mg C m-3 d-1), and the lowest rate was found in the Kuroshio waters (i.e., KW) with the averaged value of 34.34 ± 15.91 mg C m-3 d-1. The higher PCR in CCW than in KW might be contributed to higher values of chlorophyll a (Chl a) concentration and bacterial production (BP) in the CCW. Seasonally, the highest PCR was found in spring (78.91 ± 67.89 mg C m-3 d-1), and the lowest rate was observed in winter (29.4 ± 17.4 mg C m-3 d-1). This pattern might be resulted from seasonal differences in bacterial biomass, BP and Chl a concentration. Results were further used to explore the potential factors that regulated on seasonal variation in different water masses along the transect including CCW, Taiwan strait waters (TW), and KW. The PCR was mostly attributed by phytoplankton in the CCW. In the TW, the PCR was mostly contributed by bacterioplankton and phytoplankton.東海群East China SeaPlanktonic community respiration