Filters: Tags: nutrient content (X)87 results (50ms)
Nitrogen, phosphorus, and suspended-sediment loads, and changes in loads, in rivers across the Chesapeake Bay watershed have been calculated using monitoring data from the nine Chesapeake Bay River Input Monitoring (RIM) stations for the period 1985 through 2015. Nutrient and suspended-sediment loads and changes in loads were determined by applying a weighted regression approach called WRTDS (Weighted Regression on Time, Discharge, and Season). Yields (represents the mass of constituent transported from a unit area of a given watershed) are used to compare the export loads from one basin to another. Yield results are obtained by dividing the annual load (pounds) of a given constituent by the respective watershed...
Influence of Ambient Mineral Composition and Blue-Green Algae on Veligers of Dreissena polymorpha (Pall.)
Baseline groundwater-quality data from a densely developed coastal neighborhood, Falmouth, Massachusetts (2016 - 2019)
This data release provides a comprehensive dataset of sampling-site characteristics and baseline groundwater-quality data collected from a network of multilevel sampling wells installed in a densely developed coastal neighborhood undergoing a conversion from onsite septic systems to municipal sewering. Groundwater samples were collected during multiple events from a total of 227 well screens at 15 locations using a peristaltic pump between June 2016 and February 2019. Samples were collected and preserved following methods documented in the U.S. Geological Survey National Field Manual (variously dated) and Savoie and others (2012). This dataset provides well construction information, groundwater levels, water-quality...
Nutrient changes in Saginaw Bay, Lake Huron, after the establishment of the zebra mussel (Dreissena polymorpha)
Effects of elevated CO sub(2), O sub(3) and K deficiency on Norway spruce (Picea abies): Nutrient supply, content and leaching
Tree species composition, structure, and carbon storage in stands of urban forest of varying character in Halifax, Nova Scotia
Plant-insect herbivore interactions in elevated atmospheric CO sub(2): quantitative analyses and guild effects
Physiological Status and Biochemical Composition of a Natural Population of Unionid Mussels (Amblema plicata) Infested by Zebra Mussels (Dreissena polymorpha)
Natural variability of vegetation, soils, and physiography in the bristlecone pine forests of the Rocky Mountains