PATCHINESS AND NUTRITIONAL CONDITION OF ZOOPLANKmN IN THE CALIFORNIA CURRENT
PATCHINESS AND NUTRITIONAL CONDITION OF ZOOPLANKmN IN THE CALIFORNIA CURRENT
复制标题
加利福尼亚洋流中浮游动物的斑块状和营养状况
DOI：
--
复制
发表时间：
1986
期刊：
影响因子：
--
通讯作者：
J. Cox
中科院分区：
文献类型：
--
作者：
S. W. Willason;J. Favuzzi;J. Cox
1981年4月，在CalCOFI 8104号巡航期间，乘坐RV Dal'id Starr Jordan从加州海岸的81个站点收集了浮游动物和水样。重量（湿和干）。消化酶活性Oaminarinasel。测定了3种浮游动物的生化组成。测量的指数提供了估计浮游动物营养的历史上的时间尺度为1天至3周。上升流正在沿着加州海岸发生。在研究期间，从概念点到旧金山弗朗西斯科。由此产生的低表面温度在旧金山弗朗西斯科以南和概念角以北最为明显。就在这些are.as的南部，发现了高浮游植物现存量（高达14.7毫克叶绿素alm 3）的斑块。两种食草物种，EuphaWlia padfiea和Calanlls pacific.us，在具有最高密度的植物浮游生物的区域显示出最高的海带酶活性：酶活性在Point Conception附近的沃茨特别高。在采样网格的南部和近海地区的动物消化酶活性非常低。个体较大（体重）、脂肪含量较高的C.与加州海流其他地区的动物相比，在受孕点附近和弗朗西斯科南部的动物表明，这些地区的动物经历了长时间的更好的营养。艰难线虫而不是草食动物，并没有表现出这些模式。这项研究说明了上升流区的重要性。例如Point Conception。并显示了加州海流系统内营养相互作用的巨大空间变异性。
Zooplankton and water samples were collected from 81 stations off the California coast in April 1981 during CalCOFI cruise 8104 aboard the RV Dal'id Starr Jordan. Abundance, weight (wet and dry). digestive enzyme activity Oaminarinasel. and biochemical composition of three zooplankton species were determined. The indices measured provided estimates of zooplankton nutritional history on time scales of 1 day to 3 weeks. Upwelling was taking place along the California coast. from Point Conception to San Francisco dur ing the study period. The resulting low surface temperatures were most evident south of San Francisco and just north of Point Conception. Just south of these are.as patches of high phytoplankton standing crop (UP to 14.7 mg chlorophyll alm 3 ) were found The two herbivorous species, EuphaWlia padfiea and Calanlls pacific.us, showed highest laminarinase activity in areas with the highest density of phytoplank ton: enzyne activity was particularly high in the waters off Point Conception. Zooplankters in the southern and offshore regions of the samplinggrid showed very low digestive enzyme activity. The larger size (weight) and higher lipid content of C. pacl:tIc.lls near Point Conception and south of San Francisco in comparison to animals in other parts of the California Current suggest that animals in these areas experience pro longed periods of better nutrition. Nematosc.el-is difficilis. which is not a herbivore, did not show these patterns. This study illustrates the importance of upwelling regions. such as Point Conception. and shows the large spatial variability of trophic interactions within the California Current System.