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Nutrient Trends and Drivers in the Chesapeake Bay Watershed (Page 1)

Nutrient trends and drivers in the Chesapeake Bay watershed

Hyer KE, Phillips SW, Ator SW, Moyer DL, Webber JS, Felver R, Keisman JL, McDonnell LA, Murphy R, Trentacoste EM, Zhang Q, Dennison WC, Swanson S, Walsh B, Hawkey J, Taillie D ·
26 January 2021

The Chesapeake Bay Program maintains an extensive nontidal monitoring network, measuring nitrogen and phosphorus (nutrients) at more than 100 locations on rivers and streams in the watershed. Data from these locations are used by USGS to assess the ecosystem’s response to nutrient-reduction efforts.

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Susan Lynn Williams: the Life of an Exceptional Scholar, Leader, and Friend (1951–2018) (Page 1)

Susan Lynn Williams: the Life of an Exceptional Scholar, Leader, and Friend (1951–2018)

Dennison WC, Bracken MES, Brown M, Bruno JF, Carlton JT, Carpenter RC, Carruthers TJB, Dethier MN, Duarte CM, Fisher TR, Fourqurean JW, Grosberg RK, Hamdan LJ, Heck KL, Howard DJ, Hughes AR, Hughes BB, Kendrick GA, Kenworthy WJ, Mars F, McRoy CP, Naylor RL, Nyden B, Ogden JC, Olyarnik S, Orth RJ Short FT, Sorte CJB, Stachowicz JJ Strong DR, Sur C, Waycott M ·
2021

Susan Lynn Williams (1951–2018) was an exceptional marine ecologist whose research focused broadly on the ecology of benthic nearshore environments dominated by seagrasses, seaweeds, and coral reefs. She took an empirical approach founded in techniques of physiological ecology. Susan was committed to applying her research results to ocean management through outreach to decision-makers and resource managers.

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Nutrient limitation of phytoplankton in Chesapeake Bay: Development of an empirical approach for water-quality management (Page 1)

Nutrient limitation of phytoplankton in Chesapeake Bay: Development of an empirical approach for water-quality management

Zhang Q, Fisher TR, Trentacoste EM, Buchanan C, Gustafson AB, Karrh R, Murphy RR, Keisman J, Wu C, Tian R, Testa JM, Tango PJ ·
2021

Understanding the temporal and spatial roles of nutrient limitation on phytoplankton growth is necessary for developing successful management strategies. Chesapeake Bay has well-documented seasonal and spatial variations in nutrient limitation, but it remains unknown whether these patterns of nutrient limitation have changed in response to nutrient management efforts.

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Tarjetas de Reporte para los Observatorios Costeros (Page 1)

Tarjetas de Reporte para los Observatorios Costeros

Laboratorio Nacional de Resiliencia Costera ·
1 January 2021

El presente documento contiene los principales conceptos, notas, procesos y consideraciones necesarias para emprender una tarjeta de reporte. Debido a que las tarjetas de reporte involucran diversas etapas y actividades, resulta necesario conocer cada una de ellas a profundidad para tener claridad en este proceso.

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Potomac Tributary Report: A summary of trends in tidal water quality and associated factors, 1985-2018 (Page 1)

Potomac Tributary Report: A summary of trends in tidal water quality and associated factors, 1985-2018

Keisman J, Murphy RR, Devereux OH, Harcum J, Karrh R, Lane M, Perry E, Webber J, Wei Z, Zhang Q, Petenbrink M ·
18 December 2020

The Potomac Tributary Report summarizes change over time in a suite of monitored tidal water quality parameters and associated potential drivers of those trends for the time period 1985 – 2018, and provides a brief description of the current state of knowledge explaining these observed changes.

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Recent status and long‐term trends in freshwater discharge and nutrient inputs (Page 1)

Recent status and long‐term trends in freshwater discharge and nutrient inputs

Zhang Q, Cozzi S, Palinkas C, Giani M ·
18 December 2020

Anthropogenic inputs of nutrients via river runoff are the primary drivers of ecosystem degradation in Chesapeake Bay (CB) and the northern Adriatic Sea (NAS). The annual cycle of river flow is typically unimodal in CB (seasonal peak during spring) and bimodal in the NAS (peaks during April–June and October–December). Dissolved inorganic nitrogen accounts for most of the total nitrogen (TN) in both systems.

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Temporal inequality of nutrient and sediment transport: a decision-making framework for temporal targeting of load reduction goals (Page 1)

Temporal inequality of nutrient and sediment transport: A decision-making framework for temporal targeting of load reduction goals

Preisendanz HE, Veith TL, Zhang Q, Shortle J ·
2021

Nutrient and sediment transport exhibit strong spatial and temporal inequality, with a small percentage of locations and events contributing to the vast majority of total annual loads. The processes for determining how to reduce total annual loads at a watershed scale often target spatial, but not temporal, components of inequality.

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2020 Mississippi River Watershed Report Card (Page 1)

2020 Mississippi River Watershed Report Card

Kimberly Lutz, Frank Morton, Bob Beduhn, Joan Freitag, Stephen Gambrell, Steve Mathies, Dan Mecklenborg, Michael Reuter, David Simmons, Larry Weber (Chair), Heath Kelsey, Vanessa Vargas-Nguyen, Katie May Laumann, Steven Guinn, Sky Swanson, Jane Hawkey. and AWI Board of Directors: Kimberly Lutz, AWI Executive Director Bob Beduhn, HDR Inc. Sean Duffy Sr., Big River Coalition Joan C. Freitag, Hanson Professional Services Stephen Gambrell, Mississippi Valley Flood Control Association Teri Goodmann, City of Dubuque, Iowa Steve Mathies, Stantec Consulting Services Dan Mecklenborg, Ingram Barge Company Frank Morton, Turn Services LLC Rachel Orf, National Corn Growers Association Michael Reuter, The Nature Conservancy Rainy Shorey, Caterpillar, Inc. Robert “Bob” Sinkler, Streamside Systems Inc, and Dawson & Associates BG (Ret.) C. David Turner, American Water Military Services Group Kirsten Wallace, Upper Mississippi River Basin Association Larry Weber, University of Iowa ·
10 December 2020

Stretching across 31 US states and 2 Canadian provinces, America’s Watershed benefits millions of people and thousands of communities. It supports our many economic activities while remaining a natural and recreational treasure of global importance.

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Coral reef condition : A status report for U.S. Coral Reefs (Page 1)

Coral reef condition : A status report for U.S. Coral Reefs

Donovan EC, Towle E, Kelsey RH, Allen M, Barkley H, Besemer N, Blondeau J, Eakin M, Edwards K, Enochs I, Fleming C, Geiger E, Grove LJ, Groves S, Johnson M, Johnston M, Kindinger T, Manzello D, Miller M, Oliver T, Samson J, and Viehman S. ·
11 November 2020

Pacific and Atlantic data from 2012–2018 indicate that U.S. coral reefs are in fair condition. Most themes did not meet their historical references, meaning they are moderately to very impacted. There are exceptions, but overall, the data suggest that reefs are vulnerable to further decline due to threats from ocean warming and acidification, coral disease, and fishing impacts. Download the document to learn more about U.S. Coral Reef condition.

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