Organization

Office of the Associate Director for Ecosystems

Ecosystems are integrated systems of organisms interacting with their physical environments, constituting the Earth's biosphere and supporting human existence. Resilient functioning ecosystems support food webs, build soil, enhance crop pollination, purify water, cycle nutrients, detoxify waste, and regulate the atmosphere. The U.S. Geological Survey (USGS) conducts research and monitoring to develop and convey a fundamental understanding of ecosystem function and distributions, physical and biological components and trophic dynamics for freshwater, terrestrial, and marine ecosystems and the human and fish and wildlife communities they support.

http://www.usgs.gov/ecosystems/

Location
John W Powell
12201 Sunrise Valley Drive
Reston , VA 20192-0002
USA

Parent Organization:

Office of the Director for USGS

9 items:

Data acquired in laboratory experiments conducted with the stonefly Zapada sp. and the ephemerellid mayflies Drunella sp. and Ephemerella tibialis to characterize uptake and surface adsorption after short aqueous exposures to uranium, 2017-2019 Little is known about the underlying mechanisms governing uranium (U) bioaccumulation in aquatic insects, especially the influence of surface adsorption on the measured U concentrations (Henry et al. 2020). U.S. Geological Survey scientists are conducting experiments to parameterize conditional rate constants for aqueous U uptake and to quantify desorption of weakly bound U from insect's integument. Henry, Brianna L., Marie-Noële Croteau, David M. Walters, Janet L. Miller, Daniel J. Cain, and Christopher C. Fuller. Uranium bioaccumulation dynamics in the mayfly Neocloeon triangulifer and application to site-specific prediction. Environmental Science & Technology 54, no. 18 (2020): 11313-11321. Categories: Data; Tags: Clark Fork (MT), Deer Creek (CO), Environmental Health, Menlo Park (CA), Stevens Creek (CA), All tags...
Determination of the effect of temperature (Q10) on denitrification rates in sediments collected from a groundwater discharge site in Ashumet Pond on Cape Cod, MA This data release presents results from a laboratory study designed to measure the effect of temperature on denitrification rates in sediments collected from 5- to 30-cm depth below the lake bottom, at a location where groundwater discharges to the lake. Sediment cores were collected June 25, 2014 from the West site (Fishermans Cove) in Ashumet Pond, Cape Cod, MA then shipped to Boulder, CO for laboratory experiments. Groundwater used for these experiments was collected from a well just upgradient of the sediment collection site. Denitrification rates were determined on sediment plus groundwater slurries maintained under anaerobic conditions and employing the acetylene block method. Nitrous oxide concentrations... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: USGS Science Data Catalog (SDC)
Cyanotoxin Concentration and Phytoplankton Community Composition Data for Surface Water Samples Collected at Lake Mattamuskeet National Wildlife Refuge, North Carolina during summer 2015 Data release including concentrations of cyanotoxins and phytoplankton community composition data for water samples collected from the Lake Mattamuskeet National Wildlife Refuge in North Carolina during 2015. Categories: Data; Types: Citation; Tags: Cylindrospermopsis raciborskii, Lake Mattamuskeet National Wildlife Refuge, North Carolina, USGS Science Data Catalog (SDC), United States, All tags...
Aboveground Mangrove Biomass Data Collected from and Species Dominance Maps of Pohnpei, Federated States of Micronesia Aboveground Biomass Data from Pohnpei, Federated States of Micronesia. Plot data includes X and Y location, downed dead wood (DDW) count, mangrove species identification, and site descriptions. Species information was recorded for Bruguiera gymnorhiza, Sonneratia alba, Xylocarpus granatum, Lumnitzera littorea, Rhizophora apiculata, Rhizophora lamarckii, Rhizophora mucronata, Rhizophora stylosa and Ceriops tagal. Mangroves were inventoried for species identification, diameter at breast height (DBH), height, and dead status. Categories: Data; Tags: Biomass, Carbon Sinks, Ecosystem Management, Federated States of Micronesia, Field Inventory and Monitoring, All tags...
Growth of cultured Picocystis strain ML in the presence of arsenic, and occurrence of arsenolipids in these Picocystis as well as biota and sediment from Mono Lake, California Mono Lake is a hypersaline soda lake rich in dissolved inorganic arsenic with its primary production currently dominated by Picocystis str. ML. We set out to determine if this picoplankter could metabolize inorganic arsenic, and in doing so form unusual arsenolipids (e.g., methylated arsinoyl ribosides) as reported in other saline ecosystems and by halophilic algae. We cultivated Picocystis str. ML on an inorganic seawater-based medium with either low (37 µM) or high (1,000 µM) phosphate in the presence of arsenite (~0.4 mM), arsenate (~0.8 mM), or without arsenic additions. Categories: Data; Tags: Environmental Health, Geochemistry, Mono Lake, Picocystis, USGS Science Data Catalog (SDC), All tags...

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