September 2002 surface water phytoplankton productivity for 10 Georgia Coastal Ecosystems LTER sampling sites

Water samples were collected by Niskin bottle or by hand from just beneath the surface during low tide surveys at or near 10 GCE-LTER sampling sites in September 2002. The incorporation of radiolabelled bicarbonate in response to varying levels of illumination was measured using a photosynthetron apparatus. Photosynthesis-irradiance (P-I) curves constructed from these measurements will be used in conjunction with algal biomass and PAR versus depth measurements to estimate instantaneous gross primary production in the water at each GCE sampling site. This study was part of the GCE-LTER hydrographic monitoring program, and will be repeated quarterly.

2002年9月，研究人员在10个GCE-LTER采样站点及其周边区域的低潮位调查中，通过尼斯金采水器（Niskin bottle）或手工方式采集了近表层海水样本。研究人员利用光合测定装置（photosynthetron apparatus），测量了不同光照强度下放射性标记碳酸氢盐的光合同化量。基于上述测量结果构建的光合-光照（P-I）曲线，将与藻类生物量以及光合有效辐射（Photosynthetically Active Radiation，PAR）随深度的分布测量数据相结合，用于估算各GCE-LTER采样站点处海水的瞬时总初级生产量。本研究为GCE-LTER水文监测计划的组成部分，且将按季度重复开展。