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Very Nearshore Oceanography and the Dispersal of Larval Invertebrates

极近岸海洋学和无脊椎动物幼虫的扩散

基本信息

批准号：
0002891
负责人：
Alan Shanks
金额：
$ 4.99万
依托单位：
University of Oregon Eugene
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2000
资助国家：
美国
起止时间：
2000-06-01 至 2002-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0002891&HistoricalAwards=false
关键词：
Very Nearshore Oceanography Dispersal Larval

项目摘要

This study tests the hypothesis that along a rocky coastline nearshore topographically generated secondary circulation affects the cross-shelf dispersal of the larvae of coastal organisms. Secondary circulation may isolate the waters within a small bay from the more offshore waters and my prevent larvae from dispersing out into the coastal waters. Alternatively, it could prevent larvae that have developed in the coastal waters from returning to settlement sites on the shore. These possibilities will be investigated, as well as the underlying patterns and mechanisms. This study would be the first test of these hypotheses.Physical oceanography and concurrent larval distributions associated with topographically generated secondary circulation will be described at sites along the Oregon coast. CTD transects will be taken extending from the beach through the secondary circulation front and out into the coastal waters. Transects of vertical plankton tows will be made concurrently with the CTD sampling to describe the distribution of meroplankton. By affecting larval dispersal, this small-scale circulation could bring about variations in the settlement and recruitment of larvae to the shore. At Sunset Bay, abundance and settlement of cyprids and mussels will be measured at mooring sites across the front at the mouth of the bay. Following the accumulation of animals on settlement plates and brushes will monitor settlement.

这项研究测试的假设，沿着一个岩石海岸线近岸地形产生的二次环流影响沿海生物的幼虫的跨大陆架扩散。二次环流可能会将小海湾内的沃茨水域与近海沃茨水域隔离开来，并防止幼虫散布到沿海沃茨水域。或者，它可以防止在沿海沃茨发育的幼虫返回海岸的定居点。将对这些可能性以及潜在的模式和机制进行调查。这项研究将是这些hypothesis.Physical海洋学和并发幼虫分布与地形产生的次级环流将被描述在沿着的俄勒冈州海岸的网站。 CTD断面将从海滩延伸，通过次级环流锋，进入沿海沃茨。垂直浮游生物拖曳的断面将与CTD采样同时进行，以描述浮游生物的分布。通过影响幼虫的扩散，这种小规模的环流可能会导致幼虫在海岸的定居和补充的变化。在日落湾，塞浦路斯和贻贝的丰度和定居点将在海湾口前的停泊点测量。在动物聚集在沉降板和刷子上后，将监测沉降。