Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16784
Assessing winter cover crop nutrient uptake efficiency using a water quality simulation model
Winter cover crops are an effective conservation management practice with potential to improve water quality. Throughout the Chesapeake Bay Watershed (CBW), which is located in the Mid-Atlantic US, winter cover crop use has been emphasized and federal and state cost-share programs are available to farmers to subsidize the cost of winter cover crop establishment. The objective of this study was to
Authors
In-Young Yeo, Sangchui Lee, Ali M. Sadeghi, Peter C. Beeson, W. Dean Hively, Greg W. McCarty, Megan W. Lang
Chesapeake Bay waterbirds, sea-level rise, and island restoration
No abstract available.
Authors
R. Michael Erwin
The Cambrian-Ordovician rocks of Sonora, Mexico, and southern Arizona, southwestern margin of North America (Laurentia)
Cambrian and Ordovician shelf, platform, and basin rocks are present in Sonora, Mexico, and southern Arizona and were deposited on the southwestern continental margin of North America (Laurentia). Cambrian and Ordovician rocks in Sonora, Mexico, are mostly exposed in scattered outcrops in the northern half of the state. Their discontinuous nature results from extensive Quaternary and Tertiary surf
Authors
William R. Page, Alta C. Harris, John E. Repetski
Priority data on marine and estuarine resources within northeastern National Parks: Inventory and acquisition needs
The purpose of this project was to guide development of a strategy for the inventory and mapping of submerged natural resources associated within 10 coastal parks of the National Park Service (NPS) Northeast Region (NER; see Table 1). Priority data needs were identified by the NER Ocean Stewardship Task Force. The majority of the NER priority data needs involve the biotic, chemical, and geologica
Authors
Tracy E. Hart, Hilary A. Neckles, Blaine S. Kopp
An evaluation of automated GIS tools for delineating karst sinkholes and closed depressions from 1-meter LIDAR-derived digital elevation data
LiDAR (Light Detection and Ranging) surveys of karst terrains provide high-resolution digital elevation models (DEMs) that are particularly useful for mapping sinkholes. In this study, we used automated processing tools within ArcGIS (v. 10.0) operating on a 1.0 m resolution LiDAR DEM in order to delineate sinkholes and closed depressions in the Boyce 7.5 minute quadrangle located in the northern
Authors
Daniel H. Doctor, John A. Young
A comparison of data-driven groundwater vulnerability assessment methods
Increasing availability of geo-environmental data has promoted the use of statistical methods to assess groundwater vulnerability. Nitrate is a widespread anthropogenic contaminant in groundwater and its occurrence can be used to identify aquifer settings vulnerable to contamination. In this study, multivariate Weights of Evidence (WofE) and Logistic Regression (LR) methods, where the response var
Authors
Alessandro Sorichetta, Cristiano Ballabio, Marco Masetti, Gilpin R. Robinson, Simone Sterlacchini
Evaluating a multispecies adaptive management framework: Must uncertainty impede effective decision-making?
Application of adaptive management to complex natural resource systems requires careful evaluation to ensure that the process leads to improved decision-making. As part of that evaluation, adaptive policies can be compared with alternative nonadaptive management scenarios. Also, the value of reducing structural (ecological) uncertainty to achieving management objectives can be quantified.A multisp
Authors
David R. Smith, Conor P. McGowan, Jonathan P. Daily, James D. Nichols, John A. Sweka, James E. Lyons
100,000-year-long terrestrial record of millennial-scale linkage between eastern North American mid-latitude paleovegetation shifts and Greenland ice-core oxygen isotope trends
We document frequent, rapid, strong, millennial-scale paleovegetation shifts throughout the late Pleistocene, within a 100,000+ yr interval (~ 115–15 ka) of terrestrial sediments from the mid-Atlantic Region (MAR) of North America. High-resolution analyses of fossil pollen from one core locality revealed a continuously shifting sequence of thermally dependent forest assemblages, ranging between tw
Authors
Ronald J. Litwin, Joseph P. Smoot, Milan J. Pavich, Helaine W. Markewich, George Brook, Nancy J. Durika
Chalcopyrite—bearer of a precious, non-precious metal
The mineral chalcopyrite (CuFeS2) is the world's most abundant source of copper, a metal component in virtually every piece of electrical equipment. It is the main copper mineral in several different ore deposit types, the most important of which are porphyry deposits. Chalcopyrite is unstable at the Earth's surface, so it weathers from sulphide outcrops and mine waste piles, contributing acid and
Authors
Bryn E. Kimball
Semidiurnal temperature changes caused by tidal front movements in the warm season in seabed habitats on the Georges Bank northern margin and their ecological implications
Georges Bank is a large, shallow feature separating the Gulf of Maine from the Atlantic Ocean. Previous studies demonstrated a strong tidal-mixing front during the warm season on the northern bank margin between thermally stratified water in the Gulf of Maine and mixed water on the bank. Tides transport warm water off the bank during flood tide and cool gulf water onto the bank during ebb tide. Du
Authors
Vincent G. Guida, Page C. Valentine, Leslie B. Gallea
40Ar/39Ar evidence for Late Devonian deformation in the Chester shear zone, east central Maine
No abstract available.
Authors
Hind Ghanem, Michael J. Kunk, Allan Ludman, David Bish, Robert Wintsch, Joseph Biasi