Publications
Publications intro.
Filter Total Items: 450
Red knot stopover population size and migration ecology at Delaware Bay, USA, 2022
Red Knots (Calidris canutus rufa) stop at Delaware Bay on the mid-Atlantic coast of North America during northward migration to feed on eggs of horseshoe crabs (Limulus polyphemus). In the late 1990s and early 2000s, the number of Red Knots found at Delaware Bay declined from ~50,000 to ~13,000. Horseshoe crabs have been harvested for use as bait in eel (Anguilla rostrata) and whelk (Busycon) fish
Authors
James E. Lyons
Water-quality trends in the Delaware River Basin calculated using multisource data and two methods for trend periods ending in 2018
Many organizations in the Delaware River Basin (DRB) monitor surface-water quality for regulatory, scientific, and decision-making purposes. In support of these purposes, over 260,000 water-quality records provided by 8 different organizations were compiled, screened, and used to generate water-quality trends in the DRB. These trends, for periods of record that end in 2018, were generated for 124
Authors
Megan E. Shoda, Jennifer C. Murphy
Distribution and demography of Southwestern Willow Flycatchers in San Diego County, 2015–19
We surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) at 33 locations along multiple drainages in San Diego County, including portions of Agua Hedionda Creek, Cottonwood Creek, Escondido Creek, Los Penasquitos Creek, Otay River, San Diego River, San Dieguito River, San Luis Rey River, Sweetwater River, and Tijuana River. Resident flycatchers were only found on tw
Authors
Scarlett L. Howell, Barbara E. Kus, Shannon M. Mendia
Nutrient limitation of phytoplankton in three tributaries of Chesapeake Bay: Detecting responses following nutrient reductions
Many coastal ecosystems suffer from eutrophication, algal blooms, and dead zones due to excessive anthropogenic inputs of nitrogen (N) and phosphorus (P). This has led to regional restoration efforts that focus on managing watershed loads of N and P. In Chesapeake Bay, the largest estuary in the United States, dual nutrient reductions of N and P have been pursued since the 1980s. However, it remai
Authors
Qian Zhang, Thomas R. Fisher, Claire Buchanan, Anne B. Gustafson, Renee Karrh, Rebecca R. Murphy, Jeremy M. Testa, Richard Tian, Peter J. Tango
Report of the River Master of the Delaware River for the period December 1, 2012–November 30, 2013
A Decree of the Supreme Court of the United States, entered June 7, 1954, established the position of Delaware River Master within the U.S. Geological Survey. In addition, the Decree authorizes diversion of water from the Delaware River Basin and requires compensating releases from certain reservoirs, owned by New York City, to be made under the supervision and direction of the River Master. The D
Authors
Vincent J. DiFrenna, William J. Andrews, Kendra L. Russell, J. Michael Norris, Robert R. Mason,
An evaluation of the reliability of plumage characters for sexing adult Ruddy Turnstones Arenaria interpres morinella during northward passage in eastern North America
We used two datasets to investigate the reliability of plumage for sexing adult Ruddy Turnstones Arenaria interpres of the morinella subspecies during May and early June in Delaware Bay, on the Mid-Atlantic Coast of the United States (39.1202°N, 75.2479°W). We first examined 23 years of data on the capture and recapture of 1,818 individual Ruddy Turnstones to assess the consistency of observers wi
Authors
Peter J. Fullagar, R. Terry Chesser, Humphrey P. Sitters, Christopher C. Davey, Lawrence J. Niles, Serguei Vyacheslavovich Drovetski, M. Nandadevi Cortes-Rodriguez
Shelf ecosystems along the U.S. Atlantic Coastal Plain prior to and during the Paleocene-Eocene Thermal Maximum: Insights into the stratigraphic architecture
The Paleocene-Eocene Thermal Maximum (PETM) is the most pronounced global warming event of the early Paleogene related to atmospheric CO2 increases. It is characterized by negative δ18O and δ13C excursions recorded in sedimentary archives and a transient disruption of the marine biosphere. Sites from the U.S. Atlantic Coastal Plain show an additional small, but distinct δ13C excursion below the on
Authors
Monika Doubrawa, Peter Stassen, Marci M. Robinson, Tali Babila, James Zachos, Robert P. Speijer
Projected stream fish community risk to climate impacts in the Northeastern and Midwestern United States
Climate change is expected to alter stream fish habitat potentially leading to changes in the composition and distribution of fish communities. In the Northeastern and Midwestern United States we identified the distribution and characteristics of those fish communities most and least at risk of experiencing changes in climate which deviate from the climate they are associated with. We classified s
Authors
N. Sievert, Craig Paukert, J. B. Whittier, Wesley Daniel, D.M. Infante, Jana Stewart
Astrochronology of the Paleocene-Eocene Thermal Maximum on the Atlantic Coastal Plain
The chronology of the Paleocene-Eocene Thermal Maximum (PETM, ~56 Ma) remains disputed, hampering complete understanding of the possible trigger mechanisms of this event. Here we present an astrochronology for the PETM carbon isotope excursion from Howards Tract, Maryland a paleoshelf environment, on the mid-Atlantic Coastal Plain. Statistical evaluation of variations in calcium content and magnet
Authors
Mingsong Li, Timothy J. Bralower, Lee R. Kump, Jean Self-Trail, James C. Zachos, William D. Rush, Marci M. Robinson
Delaware and Landsat
Delaware’s status as the first State to ratify the U.S. Constitution is a well-known point of pride. “The First State” is among Delaware’s nicknames, alongside “the Blue Hen State,” “the Diamond State,” and “the Small Wonder,” the last of which relates to Delaware’s diminutive land area—larger only than Rhode Island. Less well known, perhaps, is Delaware’s geographic distinction as the State with
Effects of return flows on stream water quality and availability in the Upper Colorado, Delaware, and Illinois River Basins
Understanding effects of human water use and subsequent return flows on the availability and suitability of water for downstream uses is critical to efficient and effective watershed management. We compared spatially detailed estimates of stream chemistry within three watersheds in diverse settings to available standards to isolate effects of wastewater and irrigation return flows on the suitabili
Authors
Scott Ator, Olivia L. Miller, David A. Saad
Assessing wave attenuation with rising sea levels for sustainable oyster reef-based living shorelines
In densely populated coastal areas with sea-level rise (SLR), protecting the shorelines against erosion due to the wave impact is crucial. Along with many engineered structures like seawalls and breakwaters, there are also green structures like constructed oyster reefs (CORs) that can not only attenuate the incident waves but also grow and maintain pace with SLR. However, there is a lack of data a
Authors
Reza Salatin, Hongqing Wang, Q. Chen, Ling Zhu