J
James J. Roberts
Researcher at United States Geological Survey
Publications - 27
Citations - 1432
James J. Roberts is an academic researcher from United States Geological Survey. The author has contributed to research in topics: Hypoxia (environmental) & Perch. The author has an hindex of 15, co-authored 27 publications receiving 1235 citations. Previous affiliations of James J. Roberts include Virginia Tech College of Natural Resources and Environment & University of Michigan.
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Journal ArticleDOI
Assessing and addressing the re-eutrophication of Lake Erie: Central basin hypoxia
Donald Scavia,J. David Allan,Kristin K. Arend,Steven M. Bartell,Dmitry Beletsky,Nate S. Bosch,Stephen B. Brandt,Ruth D. Briland,Irem Daloğlu,Joseph V. DePinto,David M. Dolan,Mary Anne Evans,Troy M. Farmer,Daisuke Goto,Haejin Han,Tomas O. Höök,Roger L. Knight,Stuart A. Ludsin,Doran M. Mason,Anna M. Michalak,R. Peter Richards,James J. Roberts,Daniel K. Rucinski,Edward S. Rutherford,David J. Schwab,Timothy M. Sesterhenn,Hongyan Zhang,Yuntao Zhou,Yuntao Zhou +28 more
TL;DR: In this paper, recent trends in key eutrophication-related properties, assess their likely ecological impacts, and develop load response curves to guide revised hypoxia-based loading targets called for in the 2012 Great Lakes Water Quality Agreement.
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Groin dissection versus groin radiation in carcinoma of the vulva: A gynecologic oncology group study
Frederick B. Stehman,Brian N. Bundy,Gillian Thomas,Mahesh A. Varia,Takashi Okagaki,James J. Roberts,Jeffrey G. Bell,Paul B Heller +7 more
TL;DR: Radiation of the intact groins as given in this study is significantly inferior to groin dissection in patients with squamous carcinoma of the vulva and (N 0–1 ) nodes.
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Seasonal and interannual effects of hypoxia on fish habitat quality in central Lake Erie
Kristin K. Arend,Kristin K. Arend,Dmitry Beletsky,Joseph V. DePinto,Stuart A. Ludsin,James J. Roberts,James J. Roberts,Daniel K. Rucinski,Donald Scavia,David J. Schwab,Tomas O. Höök +10 more
TL;DR: The results highlight the importance of differential spatiotemporally interactive effects of DO and temperature on relative fish habitat quality and quantity.
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Effects of hypolimnetic hypoxia on foraging and distributions of Lake Erie yellow perch
James J. Roberts,James J. Roberts,Tomas O. Höök,Tomas O. Höök,Stuart A. Ludsin,Steven A. Pothoven,Henry A. Vanderploeg,Stephen B. Brandt +7 more
TL;DR: Results indicate that yellow perch avoid hypoxic bottom waters by either moving horizontally away from the hypoxic zone or migrating above the oxycline, and evidence is found to suggest that individuals that moved above the hypoxia hypolimnetic layer continue to “dive” into the Hypoxia layer to feed on benthic invertebrates.
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Fragmentation and thermal risks from climate change interact to affect persistence of native trout in the Colorado River basin
TL;DR: An empirical model to predict stream temperatures at the fragment scale from downscaled climate projections along with geomorphic and landscape variables is coupled with a Bayesian Network model that integrates stochastic risks from fragmentation to project persistence of CRCT populations across the upper Colorado River basin to 2040 and 2080.