Spatial and Temporal Distribution of Coloured Dissolved Organic Matter (CDOM) in Narragansett Bay,Rhode Island: Implications for Phytoplankton in Coastal Waters |
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| Institution: | 1. United States Environmental Protection Agency, Atlantic Ecology Division, Narragansett, RI, 02882, U.S.A.;2. Graduate School of Oceanography, University of Rhode Island, Narragansett, RI, 02882, U.S.A.;1. Instituto INIBIOMA (CRUB Comahue, CONICET), Quintral 1250, 8400 S.C. de Bariloche, Rio Negro, Argentina;2. Institut de Ciències del Mar, CSIC, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Catalonia, Spain;3. Takuvik Joint International Laboratory and Québec-Océan, Université Laval, Québec, QC, Canada G1V OA6;4. Laboratory of Microbial Processes and Biodiversity, Department of Hydrobiology, Federal University of São Carlos, São Carlos, Brazil;1. Biophysics Institute, Italian National Research Council, Via G. Moruzzi 1, Pisa 56124, Italy;2. Department of Environment & Energy, Sejong University, Seoul 05006, South Korea;1. School of Oceanographic Studies, Jadavpur University, 188, Raja S. C. Mullick Road, Kolkata 700 032, West Bengal, India;2. Indian National Centre for Ocean Information Services, Kukatpally, Hyderabad, Telangana 500090, India;3. Coastal and Estuarine Environment Research Group, Port and Airport Research Institute, 3-1-1, Nagase, Yokosuka 239-0826, Kanagawa, Japan;1. Servicio de Dermatología y Venerología del Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain;2. Servicio de Medicina Interna, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain;1. Taihu Lake Laboratory Ecosystem Research Station, State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, PR China;2. University of Chinese Academy of Sciences, Beijing 100049, PR China |
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| Abstract: | One indicator of health in estuarine and coastal ecosystems is the ability of local waters to transmit sunlight to planktonic, macrophytic, and other submerged vegetation for photosynthesis. The concentration of coloured dissolved organic matter (CDOM) is a primary factor affecting the absorption of incident sunlight in coastal and estuarine waters. In estuaries, CDOM concentrations vary due to changes in salinity gradients, inflows of industrial and domestic effluents, and the production of new dissolved organic matter from marine biologic activity. CDOM absorption data have been collected from a variety of waters. However, there are a limited number of measurements along the US east coast and a general lack of data from New England waters.This study characterized the temporal and spatial variability of CDOM absorption over an annual cycle in Narragansett Bay and Block Island Sound (Rhode Island). Results suggested that, in Narragansett Bay, the magnitude of CDOM absorption is related to the seasonal variability of freshwater input from surrounding watersheds and new CDOM production from in situ biologic activity. The data show that the average CDOM absorption coefficient at 412 nm was 0·45 m?1 and the average spectral slope was 0·020 nm?1. |
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