Person

Holly A Rogers

2 items:

Dataset for temporal influences on selenium partitioning, trophic transfer, and exposure in a major U.S. river The trace element selenium is an essential element with a narrow window between concentrations needed to support life and those that cause toxicity to egg laying organisms. Selenium bioaccumulation in aquatic organisms is primarily the result of trophic transfer through food webs and is poorly predicted by dissolved concentrations in freshwater bodies. To better understand the hydrologic and biological dynamics that control selenium accumulation into fishes of the Lower Gunnison River Basin (Colorado), ecosystem scale selenium accumulation models were developed from data collected between June 2015 and October 2016. Categories: Data; Tags: Bioaccumulation, Colorado, Colorado Pikeminnow, Ecosystem Scale Selenium Accumulation Model, Lower Gunnison, All tags...
Data for understanding the captivity effect on invertebrate communities transplanted into an experimental stream laboratory Little is known about how design and testing methodologies affect the macroinvertebrate communities that are held captive in mesocosms. To address this gap, we conducted a 32-day test to determine how seeded invertebrate communities changed once removed from the natural stream and introduced to the laboratory. We evaluated larvae survival and adult emergence in controls from 4 subsequent experiments, as well as corresponding within-river community changes. The experimental streams maintained about 80% of the invertebrates that originally colonized the introduced substrates. Many macroinvertebrate populations experienced changes in numbers through time suggesting that these taxa are unlikely to maintain static populations... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Experimental Laboratory, USGS Science Data Catalog (SDC), benthic communities, biota, ecology, All tags...

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