Phytoplankton Growth Rate and Zooplankton Grazing Rate in Kuroshio and East China Sea

View Statistics Email Alert RSS Feed

Information

Details

Project title

Code/計畫編號

NSC86-2611-M019-008

Translated Name/計畫中文名

黑潮與東海陸棚交換過程研究(III)---子計畫十二---東海陸棚與黑潮區浮游植物生長率及其被浮游動物捕食速度

Project Coordinator/計畫主持人

Jeng Chang

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Institute of Marine Biology

Website

https://www.grb.gov.tw/search/planDetail?id=304175

Year

1997

Start date/計畫起

01-08-1996

Expected Completion/計畫迄

01-07-1997

Bugetid/研究經費

458千元

ResearchField/研究領域

生物科學
漁業

本計畫為KEEP-II中子計畫12的第三年,在整個總計畫的架構中,本計畫為估量進出台灣東北方黑潮海域的各項通量中之一環。在計算葉綠素之平衡時,浮游植物的生長率直接提供了此區域中葉綠素的添加通量。同時,本計劃亦比較了黑潮中浮游植物的生長率及被捕食率在與東海產生交互作用前後是否有所不同,藉以判斷東海對黑潮中浮游生態系是否造成影響。在1996年夏季,花蓮外海的黑潮有光層中葉綠素a總量為13.3mg m/sup -2/,而到了台灣東北方太平洋側的K17站和靠東海側的M3站,就分別增為16.6及35.3mg m/sup -2/。以稀釋培養法測得的浮游植物生長率介於0.55與0.77 day/sup -1/的範圍內,且在測站之間沒有明顯的差別。在超微浮游植物方面,黑潮中聚球藻(Synechococcus)的豐富度在花蓮外海為3.9*10/sup 11/ cells m/sup -2/,在K17站為7.5*10/sup 11/ cells m/sup -2/,而在M3站大幅增高為1.0*10/sup 13/ cells m/sup -2/。聚球藻的生長率在花蓮外海為0.46 day/sup -1/,而在兩個北方的測站分別增為1.74和2.77 day/sup -1/。這些結果指出東海海水為黑潮帶來了一些能刺激浮游植物生長的物質,其效果在接近東海處較強。浮游植物群聚中因這些物質注入而受益最多的,是體型小於5.mu.m的超微浮游植物。This research project is a branch study under the "Kuroshio East China Sea exchange processes (KEEP-II)" program, and is an essential element in estimating fluxes entering and leaving a segment of Kuroshio off northeastern Taiwan. Another goal of the project is to determine if the phytoplankton dynamics in Kuroshio is influenced by mixing with East China Sea shelf water. In the summer of 1996 at a station off eastern Taiwan, before the Kuroshio received any input from East China Sea, the phytoplankton standing crop was 13.3mg Chl. a m/sup -2/. Further to the north, at a station closer to the Pacific Ocean (Sta. K17) and a station closer to East China Sea (Sta. M3), the standing crop was 16.6 and 35.3mg Chl. a m/sup -2/, respectively. Using the dilution culture method, phytoplankton growth rates ranged from 0.55 to 0.77 day/sup -1/ with small variation between stations. As for ultraplankton, the abundance of Synechococcus was 3.9*10/sup 11/ cells m/sup -2/ in Kuroshio off eastern Taiwan, 7.5*10/sup 11/ cells m/sup -2/ at Sta. K17, but increased to 1.0*10/sup 13/ cells m/sup -2/ at Sta. M3. The growth rate of Synechococcus was 0.46 day-1 off eastern Taiwan, but became much higher at the two stations more to the north. These results indicated that phytoplankton growth was stimulated when East China Sea water mixed into Kuroshio. The most significantly influenced phytoplankton was small species with a body size smaller than 5.mu.m.

Keyword(s)

浮游植物
浮游動物
初級生產量
生長率
捕食消耗率
稀釋培養
碳循環
黑潮
東海
Phytoplankton
Zooplankton
Primary productivity
Growth rate
Grazing loss rate
Dilution culture
Carbon cycle
Kuroshio
East China Sea

DSpace CRIS

Phytoplankton Growth Rate and Zooplankton Grazing Rate in Kuroshio and East China Sea

Details

Description