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An approach for decomposing river water-quality trends into different flow classes (Page 1)

An approach for decomposing river water-quality trends into different flow classes

Zhang Q, Webber JS, Moyer DL, Chanat JG ·
2021

A number of statistical approaches have been developed to quantify the overall trend in river water quality, but most approaches are not intended for reporting separate trends for different flow conditions. We propose an approach called FN2Q, which is an extension of the flow-normalization (FN) procedure of the well-established WRTDS (“Weighted Regressions on Time, Discharge, and Season”) method.

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How to Protect Free Flowing Rivers: The Bita River Ramsar Site as an Example of Science and Management Tools Working Together (Page 1)

How to Protect Free Flowing Rivers: The Bita River Ramsar Site as an Example of Science and Management Tools Working Together

Suárez CF, Paez-Vasquez M, Trujillo F, Usma JS, Thieme M, Bassi AM, Naranjo LG, Costanzo S, Manrique O, Pallaske G, and Flechas J ·
2021

The Orinoco river basin is the third largest river in the world by volume. Its catchment encompasses 27 major sub-basins including the Bita with a catchment area of about 825,000 ha, which originates in the Colombian high plains in the Llanos ecoregion.

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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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