{"product_id":"2940148317845","title":"Nutrient Concentrations and Loads and Escherichia coli Densities in Tributaries of the Niantic River Estuary, Southeastern Connecticut","description":"Nutrient concentrations and loads and Escherichia \u003cbr\u003ecoli(E. coli) densities were studied in 2005 and from 2008 \u003cbr\u003ethrough 2011 in water-quality samples from tributaries of the \u003cbr\u003eNiantic River Estuary in southeastern Connecticut. Data from \u003cbr\u003ea water-quality survey of the base flow of subbasins in the \u003cbr\u003ewatershed in June 2005 were used to determine the range of \u003cbr\u003etotal nitrogen concentrations (0.09 to 2.4 milligrams per liter), \u003cbr\u003einstantaneous loads (less than 1 to 62 pounds per day) and \u003cbr\u003ethe yields of total nitrogen ranging from 0.02 to 11.2 pounds \u003cbr\u003eper square mile per day (less than 1 to 7.2 kilograms per \u003cbr\u003ehectare per year) from basin segments. Nitrogen yields were \u003cbr\u003epositively correlated with the amount of developed land in \u003cbr\u003eeach subbasin. Stable isotope measurements of nitrate (δ\u003cbr\u003e15 N)  and oxygen (δ18 O) ranged from 3.9 to 9.4 per mil and 0.7 \u003cbr\u003eto 4.1 per mil, respectively, indicating that likely sources of \u003cbr\u003enitrate in base flow are soil nitrate and ammonium fertilizers, \u003cbr\u003esewage or animal waste, or a mixture of these sources.","brand":"ReadCycle","offers":[{"title":"Default Title","offer_id":47072595050736,"sku":"2940148317845","price":2.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940148317845_p0.jpg?v=1763701284","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940148317845","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}