This dataset contains measurements of water chemistry taken from experimental incubation of sediment cores collected from the Fox and Duck rivermouths during the 2016 growing season. In addition, some characteristics of the sediment were recorded. This data can be used to generate estimates of nutrient change over time, due to flux of nutrients from the sediments. These flux estimates (or release rates) can be used to estimate total flux from sediments to the surface waters over the course of the 2016 growing season. This dataset is a subset of a larger effort to quantitatively estimate the effect of rivermouths on nutrient loading to Lake Michigan.

Sediment data was collected for analyses of potential environmental impacts from a sea cage barramundi (Lates calcarifer) aquaculture farm.Analyses were conducted on solid wastes for N, P, OC, trace elements (e.g. Zn) and other components included in feeds. Sediment oxygen consumption rates (respiration) were used an indicator of OC input, and ammonium, phosphate, and nitrite + nitrate flux rates (umol/m2/day) as indicators of organic N and P input and breakdown (mineralisation). The N:P molar ratio of fluxes and the Redfield ratio (C:N:Si:P) were calculated.Sediments were also analysed for grain size, OC, TC, TN, TP, Zn, Li, redox and pH. Sediment Grain size (um) categories: fine silt, clay, quartz sand and coarse material (leaves, wood, rocks and shell). Sediment C, N and Total Organic C (TOC) percentages were measured. C:N ratios were calculated for the different sites (cage, north, reference and south). The ratios of Zn:Li and P:Li in sediments were also calculatedThe reference location, a transect through the cages and sites at adjacent mudbanks were sampled for sediment Redox potential (Eh), pH, temperature, and surface dissolved oxygen, temperature and salinity. Leaves from Rhizophora stylosa (the dominant mangrove species) were analysed for 15N along the entire length of Conn Creek and at the reference location.Water column sampling: Transects comprised single water samples taken subsurface at each station throughout Conn Creek. Variables measured were: dissolved nitrogen (ammonium, nitrate and TDN), dissolved phosphorus, particulate nutrients, suspended solids and dissolved silica.Other variables were: tides (spring and neap); seasons (wet/summer and dry/winter); and place in the water column (near surface and near bottom).Chlorophyll a and bacterial abundances were measured and a chl:bacteria ratio calculated (as an indicator of organic pollution).Water column photosynthetic and community respiration rates were estimated at sites near cages and remote from cages. To estimate the area of influence of the farm, the carrying capacity of the environment in the area, and the fate of uneaten feed and other aquaculture wastes.

The dataset consists of water quality parameters that have been monitored on a weekly to monthly basis at three sites in Peel Inlet and central site in Harvey Estuary from August 1977 and another two in Harvey from March 1979 (Site locations shown in large thumbnail). These parameters include: Secchi depth and total depth; surface and bottom pH, salinity, temperature, dissolved oxygen, light attenuation coefficients (calculated from irradiance and depth), total nitrogen, total phosphorus, chlorophyll a, phaeophytin, ammonium, nitrate-nitrite, filterable reactive phosphate and silicate. Samples were taken from the surface and bottom.

Nitrogen loading, estuarine volume and flushing data derived from land use and hydrodynamic models and used in study. This dataset is associated with the following publication: Boothman, W.S., and L. Coiro. Mapping Hypoxia Response to Estuarine Nitrogen Loading Using Molybdenum in Sediments. Estuaries and Coasts. Estuarine Research Federation, Port Republic, MD, USA, 46(5): 1363–1374, (2023).

Our data include detailed information about 12 species of Anatidae broods encountered on four study areas in Maine during 1977–94 as one dataset. The second dataset provides the characteristics of the wetlands which were monitored during the studies. The third dataset enumerates the effort (such as numbers of visits to each wetland) to determine numbers of broods and the number of young that reached Class IIC-III to fledge. Each wetland is described by size, pH, specific conductivity, and class according to the system of Cowardin and others (1979, Classification of wetlands and deepwater habitats of the United States, USFWS publication, 131 p.). More details of the datasets are included in the companion USGS Data Report.

이 데이터는 해양수산부에서 국가해양생태계종합조사에 따라 실시하는 갯벌조사 중 염생식물(염분이 많은 토양에서 서식하는 식물) 조사 정점의 위치 정보를 제공하기 위해 수집되었습니다.본 데이터의 주요 내용은 데이터 일련번호, 정점번호, 정점의 위도 및 경도, 조사년도, 정점의 명칭과 정점 위치에 대한 상세정보 등으로 구성되어 있습니다.본 데이터는 해양환경 변화 모니터링, 염생식물 분포 특성 연구, 해안 생태계 보전계획 수립, 갯벌 연구 기반 자료 구축 등을 위한 기반 데이터로써 활용될 수 있습니다.

Nutrient reduction on the landscape scale often focuses on actions that reduce the movement of nitrogen (N) and phosphorus (P) from agricultural lands into streams and rivers. However, processing of N and P in streams and rivers can be substantial and increasing these in-stream processing rates could result in reductions or transformations of nutrients to less labile or less mobile forms. We hypothesize that buffer conditions could influence the microbial community and sediment characteristics of streams and rivers and thereby influence in-stream N and P processing rates. As a result, we predict that variation in buffer land cover (from agricultural to wetlands to forest) causes differences in processing rates. To test this prediction, we measured inorganic nutrient transformation in the water column and sediment flux of inorganic N and P in streams draining predominantly agricultural landscapes in the Fox River and Duck Creek watersheds (WI, USA) repeatedly during the 2018 growing season.

Use of table isotope in surficial sediments and bivalves for assessing anthropogenic development in watersheds of lakes and estuaries. This dataset is associated with the following publication: Lake, J.L., J.R. Serbst, A. Kuhn, M. Charpentier, and N.J. Smucker. Evaluation of Nitrogen and Carbon Stable Isotopes in Filter Feeding Bivalves and Surficial Sediment for Assessing Aquatic Condition in Lakes and Estuaries. WATER. MDPI, Basel, SWITZERLAND, 14(22): 3712, (2022).