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Filters Date Range Past year (0) Past month (0) Past week (0) Past day (0) Custom range... To   Search Extensions Citation (5) Types Map Service (6) OGC WMS Layer (6) OGC WMS Service (6) Contacts Karen R Ryberg Dakota Water Science Center James Falcone Melinda G Knutson U.S. Geological Survey - ScienceBase More... Categories Publication (5) Tags (with Type=Subject ) water quality (6) biodiversity (2) agriculture (1) climate change (1) conservation (1) dams (1) ecosystems (1) More... View Results as: JSON ATOM CSV

Effects of landscape composition and wetland fragmentation on frog and toad abundance and species richness in Iowa and Wisconsin, USA. Conclusions: Frogs and toad species were more abundant and diverse where habitat patch diversity was high or where there were forested wetland edges. Relative abundances of amphibian populations correlated positively with metrics such as the length of edge between forest and wetland, and negatively with the presence of agricultural and urban land. Thresholds/Learnings: Synopsis: This study examined landscape-level relationships for frogs and toads by measuring associations between relative abundance and species richness based on survey data derived from anuran calls and features of land cover maps for Iowa and Wisconsin. Relative abundances correlated positively with metrics such as the length of edge between forest... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Water Quality, Wetlands, relative abundance, species richness Conservation Thresholds for Land Use Planners Conclusions: Summarizes findings from a review of literature intended to identify critical thresholds for conservation based in empirical studies of landscape fragmentation. Presents a conceptual overview of landscape fragmentation and habitat loss, as well as guidelines and thresholds relating to landscape indicators such as patch size, habitat amount, edge effects, riparian buffers, and habitat connectivity. Thresholds/Learnings: Many. See Kennedy et al. 2003. Synopsis: This report summarizes findings from a review of literature intended to identify critical thresholds for conservation based in empirical studies of landscape fragmentation. In presenting a conceptual overview of landscape fragmentation and habitat... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, Biodiversity, Conservation, Dams, Ecosystems, All tags... Fragmentation, Grazing, Guidelines, Intactness, Land Use, Landscape, Landscape fragmentation, Natural cover amount, North America, Planning, Powerlines, Roads, Settlement, Threats, Threshold, United States, Water Quality, birds, conservation thresholds, habitat loss, n/a, terrestrial mammals, Fewer tags Wildfire Impacts on nitrogen concentration and production from headwater streams in southern Alberta's Rocky Mountains. Synopsis: The objective of this study was to examine initial effects of the 2003 Lost Creek wildfire (southwestern Rocky Mountains of Alberta) on concentrations and production (yield and total export) of several nitrogen (N) forms, and to explore initial recovery of these effects within the first 3 years after the fire. During the first postfire year, nitrate (NO3–), dissolved organic nitrogen (DON), and total nitrogen (TN) concentrations in severely burned watershed streams were 6.5, 4.1, and 5.3 times greater, respectively, than those in reference streams. Weaker effects were evident for concentrations of ammonium (NH4+; 1.5 times) and total particulate nitrogen (TPN; 3.0 times). A rapid decline in mean watershed... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alberta, Canadian Rockies, Land use configuration, Natural cover amount, forest fire, All tags... local/subregional, nitrogen concentrations, nutrients, stream nitrogen concentrations, water quality, water quality, Fewer tags A Five Year Record of Sedimentation in the Los Alamos Reservoir, New Mexico, Following the Cerro Grande Fire Synopsis: The effects of the 17,400 ha Cerro Grande fire patch in New Mexico on erosion and sedimentation processes were analyzed by this study, located in the Jemez Mountains upstream of the Los Alamos Reservoir, New Mexico. This study provides a unique data set demonstrating post-fire erosion rates relative to pre-fire conditions. The fire affected a large fraction of the watershed, with 32% of the basin experiencing a moderate to high severity burn, including some of the steepest mountainous portions of the basin. Average sediment deposition was 150 m3/year prior to the fire, equivalent to an average basin-wide denudation rate of 0.009 mm/year. The year after the fire, over 21,800 m3 of sediment accumulated in... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Land use configuration, Natural cover amount, New Mexico, erosion rates, erosion rates, All tags... fire, fire, forest fire, headwaters, high desert, high desert, local (watershed), sedimentation, sedimentation, water quality, water quality, Fewer tags Total Phosphorus Load and Ancillary Data Related to Sources of Total Phosphorus in the Red River of the North Basin The Red River of the North (Red River) transports phosphorus from North Dakota, Minnesota, and South Dakota, to Manitoba, Canada, and eventually into Lake Winnipeg. Phosphorus load (or flux) is the amount of total phosphorus (TP) transported by the Red River. The effect of TP load on water quality is a concern, especially with respect to downstream eutrophication issues in Lake Winnipeg, Manitoba, Canada. There is interest at the State and International level to reduce TP flux – an expensive proposition, depending on the method (controlling sources, settling ponds, buffer strips, changes in land use) that is not always effective during spring runoff. The purpose of the study for which these data were developed... Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Crookston, Crookston, Crookston, Emerson, Emerson, All tags... Emerson, Fargo, Fargo, Fargo, Halstad, Halstad, Halstad, Kindred, Kindred, Kindred, Manitoba, Manitoba, Minnesota, Minnesota, Moorhead, Moorhead, Moorhead, Neche, Neche, Neche, North Dakota, North Dakota, Pembina River, Pembina River, Pembina River, Red Lake River, Red Lake River, Red Lake River, Red River of the North, Red River of the North, Red River of the North, Sheyenne River, Sheyenne River, Sheyenne River, South Dakota, South Dakota, USGS Science Data Catalog (SDC), Water Quality, agriculture, loads, phosphorus, surface water quality, total phosphorus, water quality, Fewer tags Environmental Trends in British Columbia 2002 Conclusions: Presents environmental indicators for the purpose of guiding future planning efforts. These include 16 key indicators incorporating 64 separate measures highlighting the status and trends in environmental issues, as well targets to guide planning efforts. Thresholds/Learnings: Road density thresholds: Grizzly Bear 0.4km/km2; Black Bear 1.25km/km2; Elk 0.62 km/km2; and Bull Trout 0.1-1.31 km/km2 Synopsis: This document represents British Columbia’s third environmental indicators report, including 16 key indicators incorporating 64 separate measures highlighting the status and trends in environmental issues. The information is grouped into six theme areas: biodiversity, water, stewardship, human health... Categories: Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: British Columbia, Climate change, Land use configuration, Landscape fragmentation, Natural cover amount, All tags... Natural cover heterogeneity, biodiversity, biodiversity, climate change, environmental indicators, environmental quality, human health and the environment, meso-regional, multiple, toxic contaminants, water, water quality, Fewer tags