ENVIRONMENTAL CHARACTERIZATION OF AN EUTROPHICATED SEMI-ENCLOSED SYSTEM: NUTRIENT BUDGET (ENCERRADA BAY, TIERRA DEL FUEGO ISLAND, PATAGONIA, ARGENTINA)

TORRES, AMERICO; GIL, MONICA; AMIN, OSCAR; ESTEVES, JOSE LUIS

WATER AIR AND SOIL POLLUTION

Spinger

Año: 2009

0049-6979

Encerrada Bay (EB) is located in the far south of Argentina, on the north coast of the Beagle Channel and is artificially connected with Ushuaia Bay (UB). This study was carried out between 2004 and 2005; and assesses the impact of Ushuaia city to the nutrient dynamics in EB. It was focused on physical and chemical characterization of discharges, water and sediment quality, nutrient benthic fluxes, and water exchange with UB. The average ammonium, nitrate, phosphate and silicate concentrations in the water bay were 99.5±30.7; 10.0±4.2; 2.0±0.7; 23.5±2.9 ìM, respectively. Benthic fluxes showed a consumption of oxygen (50–450 mg m−2h−1) and nitrate (20–416 ìmol m−2 h−1) by sediment and release of ammonium (79−4,772 ìmol m−2 h−1) and phosphate (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 of ammonium (79−4,772 ìmol m−2 h−1) and phosphate (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 of ammonium (79−4,772 ìmol m−2 h−1) and phosphate (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 nitrate (20–416 ìmol m−2 h−1) by sediment and release of ammonium (79−4,772 ìmol m−2 h−1) and phosphate (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 of ammonium (79−4,772 ìmol m−2 h−1) and phosphate (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 of ammonium (79−4,772 ìmol m−2 h−1) and phosphate (27–36 ìmol m−2 h−1) into the water column. The daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 daily contributions of nitrogen and phosphate from the effluents to EB were between 102 and 517 kg day−1 (27–36 ìmol m−2 h−