Publications
These publications showcase the significant science conducted in our Science Centers.
Filter Total Items: 16783
Groundwater recharge estimates for Maine using a Soil-Water-Balance model—25-year average, range, and uncertainty, 1991 to 2015
To address the lack of information on the spatial and temporal variability of recharge to groundwater systems in Maine, a study was initiated in cooperation with the Maine Geological Survey to use the U.S. Geological Survey Soil-Water-Balance model to evaluate annual average potential recharge across the State over a 25-year period from 1991 to 2015. The Maine Soil-Water-Balance model was calibrat
Authors
Martha G. Nielsen, Stephen M. Westenbroek
Limited detection of antibodies to clade 2.3.4.4 A/Goose/Guangdong/1/1996 lineage highly pathogenic H5 avian influenza virus in North American waterfowl
During 2014, highly pathogenic (HP) influenza A viruses (IAVs) of the A/Goose/Guangdong/1/1996 lineage (GsGD-HP-H5), originating from Asia, were detected in domestic poultry and wild birds in Canada and the US. These clade 2.3.4.4 GsGD-HP-H5 viruses included reassortants possessing North American lineage gene segments; were detected in wild birds in the Pacific, Central, and Mississippi flyways; a
Authors
David E. Stallknecht, Clara Kienzle-Dean, Nick Davis-Fields, Christopher S. Jennelle, Andrew S. Bowman, Jacqueline M. Nolting, Walter Boyce, James Crum, Jefferson Santos, Justin D. Brown, Diann Prosser, Susan E. W. De La Cruz, Joshua T. Ackerman, Michael L. Casazza, Scott Krauss, Daniel Perez, Andrew M. Ramey, Rebecca L. Poulson
Assessment of undiscovered copper resources of the world, 2015
The U.S. Geological Survey completed the first-ever global assessment of undiscovered copper resources for the two most significant sources of global copper supply: porphyry copper deposits and sediment-hosted stratabound copper deposits. The geology-based study identified 236 areas for undiscovered copper in 11 regions of the world. Estimated amounts of undiscovered copper resources are reported
Authors
Jane M. Hammarstrom, Michael L. Zientek, Heather L. Parks, Connie L. Dicken
Understanding the genetic characteristics of Wild Brook Trout populations in North Carolina thanks to the guidance of Dr. Tim King
We genotyped 7,588 brook trout representing 406 collections from across the State of North Carolina (Figure 1) at 12 microsatellite loci (King et al. 2012). The vast majority ofcollections appeared to represent single populations, based on general conformance to HardyWeinberg equilibrium and limited evidence for linkage-disequilibrium. Allelic diversity was low to moderate relative to Brook Trout
Authors
David C. Kazyak, Barbara A. Lubinski, Jacob M Rash, Tim L. King
Evidence for conservative transport of dissolved organic carbon in major river basins in the Gulf of Maine Watershed
Transport and fate of dissolved organic carbon (DOC) in rivers are important aspects of the carbon cycle and the critical linkage between terrestrial, aquatic, and marine systems. Recent studies have quantified fluvial export to the marine environment in many systems, but in-stream losses of DOC are poorly constrained. This study compares DOC yields (kg C/ha) between the area-weighted averages of
Authors
Thomas G. Huntington, Collin S. Roesler, George R. Aiken
Establishment of a vertical control network along the St. Croix River in New Brunswick and Maine
Consistent elevations at stable benchmarks, referenced to a common datum, are important for measuring and comparing water levels and for computing flows throughout a watershed. Elevations are presented for 38 control points within the St. Croix River watershed, mostly along the main stem of the St. Croix River. Vertical control points are located at 7 dams, 3 Environment Canada (EC) lake monitorin
Authors
Pamela J. Lombard
Focus areas for data acquisition for potential domestic sources of critical minerals—Rare earth elements
Rare earth elements (REEs) are critical mineral commodities for the United States. In response to a need for information on potential domestic sources of REEs in mineral deposits, the U.S. Geological Survey (USGS) identified broad focus areas throughout the conterminous United States and Alaska as a guide for selecting new geoscience research areas. This study was done to support the USGS Earth Ma
Authors
Jane M. Hammarstrom, Connie L. Dicken
The impact of late Holocene land-use change, climate variability, and sea-level rise on carbon storage in tidal freshwater wetlands on the southeastern United States Coastal Plain
This study examines Holocene impacts of changes in climate, land use, and sea-level rise (SLR) on sediment accretion, carbon accumulation rates (CAR), and vegetation along a transect of tidal freshwater forested wetlands (TFFW) to oligohaline marsh along the Waccamaw River, South Carolina (4 sites) and along the Savannah River, Georgia (4 sites). We use pollen, plant macrofossils, accretion, and C
Authors
Miriam Jones, Christopher E. Bernhardt, K. W. Krauss, Gregory Noe
Shrimp U-Pb zircon and opal geochronology, isotope geochemistry, and genesis of the super large Be deposit at Spor Mountain, Utah, USA
Ongoing studies of the Spor Mountain beryllium (Be) deposit are focused on (1) characterizing the role of igneous rocks in the genesis of the ore zones, (2) determining the timing and duration of magmatic-hydrothermal events, and (3) establishing processes related to beryllium transport and accumulation. The Spor Mountain Formation (SMF) hosts the deposit, which is the largest known volcanic rock-
Authors
Nora K. Foley, Robert A. Ayuso
Climate change science and modeling
This chapter provides a brief background on climate change science, climate simulation models, and models that project the impacts of changes in climate on tree species and ecosystems. Throughout the chapter, boxes list resources for more information on each topic. A more detailed scientific review of climate change science, trends, and modeling can be found in the Intergovernmental Panel on Clima
Authors
Patricia R. Butler-Leopold, Louis R. Iverson, Frank R. Thompson III, Leslie A. Brandt, Stephen D. Handler, Maria K. Janowiak, P. Danielle Shannon, Christopher W. Swanston, Scott Bearer, Alexander Bryan, Kenneth L. Clark, Greg Czarnecki, Philip DeSenze, William D. Dijak, Jacob S. Fraser, Paul F. Gugger, Andrea Hille, Justin Hynicka, Claire A. Jantz, Matthew C. Kelly, Katrina M. Krause, Inga P. La Puma, Deborah Landau, Richard G. Lathrop, Laura P. Leites, Evan Madlinger, Stephen N. Matthews, Gulnihal Ozbay, Matthew P. Peters, Anantha Prasad, David A. Schmit, Collin Shephard, Rebecca Shirer, Nicholas S. Skowronski, Al Steele, Susan Stout, Melissa Thomas-Van Gundy, John Thompson, Richard M. Turcotte, David A. Weinstein, Alfonso Yáñez
A regional analysis of long-term gray and harbor seal stranding events
Strong indicators of species’ sensitivity, adaptive capacity, and overall vulnerability to climate change are provided by changes in phenology, the timing of recurring life events (Parmesan and Yohe, 2003). We possess poor information on climate induced shifts in phenology of marine organisms, especially top predators. The Gulf of Maine (GOM) Seasonal Migrants Project is an ongoing effort to deter
Authors
Katharine M. L. Jones, Michelle Staudinger
A review of literature for gray and harbor seals
Climate change is impacting marine species, causing shifts in occurrence, distribution, and phenology, which can ultimately effect ecosystem structure and functioning (Parmesan & Yohe 2003; Burrows et al. 2011). The study of the timing of recurring biological events throughout an organism’s life is known as phenology (Parmesan & Yohe 2003). The way organisms respond to climate change through alter
Authors
Gabrielle Calandrino, Daniel Pendleton, Michelle Staudinger