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題名 | Summer Spatial Distribution of Copepods and Fish Larvae in Relation to Hydrography in the Northern Taiwan Strait=臺灣海峽北部橈腳類及仔魚對應於夏季水文之分布 |
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作者 | 謝志豪; 丘臺生; Hsieh, Chih-hao; Chiu, Tai-sheng; |
期刊 | 動物研究學刊 |
出版日期 | 20020100 |
卷期 | 41:1 2002.01[民91.01] |
頁次 | 頁85-98 |
分類號 | 439.2 |
語文 | eng |
關鍵詞 | 物種組成; 西南季風; 南海; 東海; 湧升流; Species composition; Southwestern monsoon; South China Sea; East China sea; Upwelling; |
中文摘要 | 本研究之目的在於分析桂腳類及仔魚對應於臺灣海峽中尺度之水文狀態之分布情形。研究時間為夏季西南好風盛行時。海流資料顯示,漲潮時東海水流入海峽東側,退潮時海峽退至東海南部。依據表演之溫度及鹽度等值分布圖以及水團之鹽溫線圖分析,此時海峽可依中線區隔為二,東側為南海表水及東海水之混合區,而西側則表現出南海次表層水在近海區湧升之現象。此研究在海峽及北臺灣水域探測之測站可區分為三個水文區:即東海峽區、西海峽區及東海區。西海峽之表水具相對之低溫高鹽,證為源於澎湖水道之南海水所湧升。東海峽表水具高溫低鹽,然而東海水則為高溫及次高鹽之狀態(稍低於西海峽水)。以聚類分析法針對橈腳類及仔魚群集進行分析,結果各顧示四個叢集,其中有三個叢集所定義的群集分別對應於三個水文區,即東海峽群、西海峽群及東海群;後兩者為主要群。西海峽群由沿岸及近海物種所組成,東海群主要為外洋物種,東海峽群在兩主要群之中間地帶屬混合群,有近海及外洋物種。典型對應分析顯示,橈腳類及仔魚群集組成之變異可由海峽北部之水文因子所解有近海及外洋物種。典型對應分析顯示,橈腳類及仔魚群集組成之變異可由海峽北部之水文因子所解釋。由迴歸分析顯示,橈腳類之密度與水溫及溶氧量呈正相關,但密度最高之橈腳類出區並不與最高之初級生產區域相吻合,出現在湧升流區外圍之穩定海區。仔魚密度與橈腳類之密度分布則呈統計上之一致性。 |
英文摘要 | This study analyzed the spatial distribution of copepods and fish larvae in relation to hydrographic conditions is the northern Taiwan strait during summer as the prevaliling southwestern monsoon drives the surface warm water from the south China Sea into the Strait and causes subsurface water upwelling in the west. Cluster analysis based on copepod and fish larvae assemblages rustled in recognition of 4 groups, of which 3 major ones conformed to the hydrography. The western Taiwan Strait group was characterized by costal and neritic species, the East China Sea group was dominated by oceanic species, and the estern Taiwna strait group consisted of both neritic and oceanic species. Analysis of domnat species also supports this result. Copepod aboundance was positively related to water temperature and dissolved oxygen. The area of high copepod abundance did not correspond to the area of high primary productivity in the upwelling area, but occurred at a stable area downstream of the upwelling. Fish larva abundance was positively related to copepod abundance. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。