caa a22 4500 445891270 CHVBK 20180317145617.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10750-010-0468-4 doi (NATIONALLICENCE)springer-10.1007/s10750-010-0468-4 Hydrologic and nutrient dynamics of a coastal bay and wetland receiving discharge from the Atchafalaya River [Elektronische Daten] [Robert Lane, Christopher Madden, John Day Jr., Darrell Solet] This article synthesizes several studies carried out at Fourleague Bay and connecting waterways of the western Terrebonne interdistributary basin of the Mississippi River delta plain, which is strongly impacted by the Atchafalaya River. Hydrologic and nutrient fluxes were measured over two tidal cycles in February, April, and September of 1982. Synoptic water quality sampling of nutrients, sediments, salinity, and chlorophyll a was carried out from April 1986 to August 1991 (17 events), during 1994 (12 events), and from 2000 to 2002 (8 events). Hydrology and nutrient dynamics of the region were controlled by winds associated with cold fronts and Atchafalaya River discharge during winter-spring, and tidal forces during summer-fall. Less than 5% of the water discharged from the Atchafalaya River entered Fourleague Bay, but nonetheless was the dominant source of nutrients, especially nitrate+nitrite (NOx), and sediments. Nitrate+nitrite concentrations entering Fourleague Bay ranged from 33.3 to 118.0μM, with highest levels occurring during peak river discharge. Fourleague Bay was a sink for DIN, with retention rates ranging from 184.4 to 704.2μg-atm−2h−1, but both a source and sink for DIP, with retention rates ranging from −2.7 to 14.9μg-atm−2h−1. Concentrations of DIN and DIP in the bay ranged from below detection limits to 49.0 and 29.1μM, respectively, while chlorophyll a ranged from 6.1 to 49.4μg/l. In the wetlands surrounding Fourleague Bay, chlorophyll a generally mirrored NOx and TSS, and generally peaked 2-15km from riverine sources. Springer Science+Business Media B.V., 2010 Atchafalaya River nationallicence Fourleague Bay nationallicence Flow-through nationallicence River diversion nationallicence Lane Robert Department of Oceanography & Coastal Science, Louisiana State University, 70803, Baton Rouge, LA, USA aut Madden Christopher South Florida Water Management District, 33416, West Palm Beach, FL, USA aut Day Jr. John Department of Oceanography & Coastal Science, Louisiana State University, 70803, Baton Rouge, LA, USA aut Solet Darrell Department of Oceanography & Coastal Science, Louisiana State University, 70803, Baton Rouge, LA, USA aut Hydrobiologia Springer Netherlands 658/1(2011-01-01), 55-66 0018-8158 658:1<55 2011 658 10750 https://doi.org/10.1007/s10750-010-0468-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-010-0468-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lane Robert Department of Oceanography & Coastal Science, Louisiana State University, 70803, Baton Rouge, LA, USA aut NATIONALLICENCE 700 1- Madden Christopher South Florida Water Management District, 33416, West Palm Beach, FL, USA aut NATIONALLICENCE 700 1- Day Jr John Department of Oceanography & Coastal Science, Louisiana State University, 70803, Baton Rouge, LA, USA aut NATIONALLICENCE 700 1- Solet Darrell Department of Oceanography & Coastal Science, Louisiana State University, 70803, Baton Rouge, LA, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 658/1(2011-01-01), 55-66 0018-8158 658:1<55 2011 658 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer