Fine scale habitat use by age-1 stocked muskellunge and wild northern pike in an upper St. Lawrence River bay
John M. Farrell, Kevin L. Kapuscinski, H. Brian Underwood
2014, Journal of Great Lakes Research (40, Supplement 2) 148-153
Radio telemetry of stocked muskellunge (n = 6) and wild northern pike (n = 6) was used to track late summer and fall movements from a common release point in a known shared nursery bay to test the hypothesis that age-1 northern pike and stocked muskellunge segregate and have different habitat affinities. Water depth,...
Influences of glacial melt and permafrost thaw on the age of dissolved organic carbon in the Yukon River basin
George R. Aiken, Robert G.M. Spencer, Robert G. Striegl, Paul F. Schuster, Peter A. Raymond
2014, Global Biogeochemical Cycles (28) 525-537
Responses of near-surface permafrost and glacial ice to climate change are of particular significance for understanding long-term effects on global carbon cycling and carbon export by high-latitude northern rivers. Here we report Δ14C-dissolved organic carbon (DOC) values and dissolved organic matter optical data for the Yukon River, 15...
Collaborative modelling and integrated decision support system analysis of a developed terminal lake basin
Richard G. Niswonger, Kip K. Allander, Anne E. Jeton
2014, Journal of Hydrology (517) 521-537
A terminal lake basin in west-central Nevada, Walker Lake, has undergone drastic change over the past 90 yrs due to upstream water use for agriculture. Decreased inflows to the lake have resulted in 100 km2 decrease in lake surface area and a total loss of fisheries due to salinization. The ecologic health of...
Experimental manipulation of TN:TP ratiossuppress cyanobacterial biovolume and microcystinconcentration in large-scale in situ mesocosms
Theodore D. Harris, Frank M. Wilhelm, Jennifer L. Graham, Keith A. Loftin
2014, Lake and Reservoir Management (30) 72-83
A global dataset was compiled to examine relations between the total nitrogen to total phosphorus ratio (TN:TP) and microcystin concentration in lakes and reservoirs. Microcystin concentration decreased as TN:TP ratios increased, suggesting that manipulation of the TN:TP ratio may reduce microcystin concentrations. This relationship was experimentally tested by adding ammonium...
Final Project Memorandum: Ecological implications of mangrove forest migration in the southeastern U.S.
Michael J. Osland, Richard H. Day, Ken W. Krauss, Andrew S. From, Jack C. Larriviere, Mark W. Hester, Erik S. Yando, Jonathan A Willis
2014, Report
Winter climate change has the potential to have a large impact on coastal wetlands in the southeastern United States. Warmer winter temperatures and reductions in the intensity of freeze events would likely lead to mangrove forest range expansion and salt marsh displacement in parts of the U.S. Gulf of Mexico...
Estimating the magnitude and frequency of floods for urban and small, rural streams in Georgia, South Carolina, and North Carolina
Toby D. Feaster, Anthony J. Gotvald, J. Curtis Weaver
2014, Book, Proceedings of the 3rd Joint Federal Interagency Conference on Sedimentation and Hydrologic Modeling
Reliable estimates of the magnitude and frequency of floods are essential for such things as the design of transportation and water-conveyance structures, Flood Insurance Studies, and flood-plain management. The flood-frequency estimates are particularly important in densely populated urban areas. A multistate approach was used to update methods for determining the...
Regional variability among nonlinear chlorophyll-phosphorus relationships in lakes
Christopher T. Filstrup, Tyler Wagner, Patricia A. Soranno, Emily H. Stanley, Craig A. Stow, Katherine E. Webster, John A. Downing
2014, Limnology and Oceanography (59) 1691-1703
The relationship between chlorophyll a (Chl a) and total phosphorus (TP) is a fundamental relationship in lakes that reflects multiple aspects of ecosystem function and is also used in the regulation and management of inland waters. The exact form of this relationship has substantial implications on its meaning and its use. We assembled...
USGS geologic Mapping and karst research in the Ozark National Scenic Riverways, Missouri, USA
David J. Weary, Victoria M Grant
2014, George Wright Society Forum (31) 157-167
The Ozark National Scenic Riverways (ONSR) was created in 1964 to protect 134 miles of the Current River and its major tributary, the Jacks Fork, that are located in south-central Missouri (fig. 1). The park includes numerous large karst springs including Big Spring, by flow volume this is the largest...
A regional neural network model for predicting mean daily river water temperature
Tyler Wagner, Jefferson Tyrell DeWeber
2014, Journal of Hydrology (517) 187-200
Water temperature is a fundamental property of river habitat and often a key aspect of river resource management, but measurements to characterize thermal regimes are not available for most streams and rivers. As such, we developed an artificial neural network (ANN) ensemble model to predict mean daily water temperature in...
Modeling spatially-varying landscape change points in species occurrence thresholds
Tyler Wagner, Stephen R. Midway
2014, Ecosphere (5) 1-16
Predicting species distributions at scales of regions to continents is often necessary, as large-scale phenomena influence the distributions of spatially structured populations. Land use and land cover are important large-scale drivers of species distributions, and landscapes are known to create species occurrence thresholds, where small changes in a landscape characteristic...
Hydrogeochemistry of prairie pothole region wetlands: Role of long-term critical zone processes
Martin B. Goldhaber, Christopher T. Mills, Jean M. Morrison, Craig A. Stricker, David M. Mushet, James W. LaBaugh
2014, Chemical Geology (387) 170-183
This study addresses the geologic and hydrogeochemical processes operating at a range of scales within the prairie pothole region (PPR). The PPR is a 750,000 km2portion of north central North America that hosts millions of small wetlands known to be critical habitat for waterfowl and other wildlife. At a local...
A new method of snowmelt sampling for water stable isotopes
D. Penna, M. Ahmad, S. J. Birks, L. Bouchaou, M. Brencic, S. Butt, L. Holko, G. Jeelani, D. E. Martinez, G. Melikadze, J. B. Shanley, S. A. Sokratov, T. Stadnyk, A. Sugimoto, P. Vreca
2014, Hydrological Processes (28) 5637-5644
We modified a passive capillary sampler (PCS) to collect snowmelt water for isotopic analysis. Past applications of PCSs have been to sample soil water, but the novel aspect of this study was the placement of the PCSs at the ground-snowpack interface to collect snowmelt. We deployed arrays of PCSs at...
The importance of context dependency for understanding the effects of low flow events on fish
Annika W. Walters
2014, Freshwater Science (35) 216-228
The natural hydrology of streams and rivers has been extensively altered by dam construction, water diversion, and climate change. An increased frequency of low-flow events will affect fish by changing habitat availability, resource availability, and reproductive cues. I reviewed the literature to characterize the approaches taken to assess low-flow events...
An applied ontology for semantics associated with surface water land cover
Dalia E. Varanka, E. Lynn Usery
Ola Ahlqvist, Dalia Varanka, Steffen Fritz, Krzysztof Janowicz, editor(s)
2014, Book chapter, Land Use and Land Cover Semantics Principles, Best Practices, and Prospects
Experimental additions of aluminum sulfate and ammonium nitrate to in situ mesocosms to reduce cyanobacterial biovolume and microcystin concentration
Ted D. Harris, Frank M. Wilhelm, Jennifer L. Graham, Keith A. Loftin
2014, Lake and Reservoir Management (30) 84-93
Recent studies suggest that nitrogen additions to increase the total nitrogen:total phosphorus (TN:TP) ratio may reduce cyanobacterial biovolume and microcystin concentration in reservoirs. In systems where TP is >100 μg/L, however, nitrogen additions to increase the TN:TP ratio could cause ammonia, nitrate, or nitrite toxicity to terrestrial and aquatic organisms. Reducing...
Geologic and physiographic controls on bed-material yield, transport, and channel morphology for alluvial and bedrock rivers, western Oregon
James E. O'Connor, Joseph F. Mangano, Scott A. Anderson, J. Rose Wallick, Krista L. Jones, Mackenzie K. Keith
2014, GSA Bulletin (126) 377-397
The rivers of western Oregon have diverse forms and characteristics, with channel substrates ranging from continuous alluvial gravel to bare bedrock. Analysis of several measurable morphologic attributes of 24 valley reaches on 17 rivers provides a basis for comparing nonalluvial and alluvial channels. Key differences are that alluvial reaches have...
Evaluating effects of Everglades restoration on American crocodile populations in south Florida using a spatially-explicit, stage-based population model
Timothy W. Green, Daniel H. Slone, Eric D. Swain, Michael S. Cherkiss, Melinda Lohmann, Frank J. Mazzotti, Kenneth G. Rice
2014, Wetlands (34) S213-S224
The distribution and abundance of the American crocodile (Crocodylus acutus) in the Florida Everglades is dependent on the timing, amount, and location of freshwater flow. One of the goals of the Comprehensive Everglades Restoration Plan (CERP) is to restore historic freshwater flows to American crocodile habitat throughout the Everglades....
Quantifying and valuing ecosystem services: An application of ARIES to the San Pedro River basin, USA
Kenneth J. Bagstad, Darius J. Semmens, Ferdinando Villa, Gary Johnson
2014, Book chapter, Handbook on the Economics of Ecosystem Services and Biodiversity
A large body of research exists that identifies and values ecosystem services - the benefits that ecosystems provide to humans (MA, 2005) - and their underlying ecological processes. However, the development of software decision support tools that integrate ecology, economics and geography that can be independently used within the public,...
Status of important prey fishes in the U.S. waters of Lake Ontario, 2013: Introduction and methods
Maureen Walsh, Brian Weidel, Michael J. Connerton
2014, NYSDEC Lake Ontario Annual Report 2013-12
Lake Ontario has a mean depth of 86 m (282 ft) and a maximum depth of 244 m (801 ft) (Herdendorf 1982). The southern, New York portion of the lake has the deepest water (Figure 1). In New York waters, about 67% of the lake is <160 m (525 ft)...
Upwelling rebound, ephemeral secondary pycnoclines, and the creation of a near-bottom wave guide over the Monterey Bay continental shelf
Olivia M. Cheriton, Erika E. McPhee-Shaw, Curt D. Storlazzi, Kurt J. Rosenberger, William J. Shaw, Ben Y. Raanan
2014, Geophysical Research Letters (41) 8503-8511
Several sequential upwelling events were observed in fall 2012, using measurements from the outer half of the continental shelf in Monterey Bay, during which the infiltration of dense water onto the shelf created a secondary, near-bottom pycnocline. This deep pycnocline existed in concert with the near-surface pycnocline and enabled the...
Assessment of Appalachian basin oil and gas resources: Carboniferous Coal-bed Gas Total Petroleum System
Robert C. Milici
Leslie F. Ruppert, Robert T. Ryder, editor(s)
2014, Professional Paper 1708-G.1
The Carboniferous Coal-bed Gas Total Petroleum System, which lies within the central and southern Appalachian basin, consists of the following five assessment units (AUs): (1) the Pocahontas Basin AU in southern West Virginia, eastern Kentucky, and southwestern Virginia; (2) the Central Appalachian Shelf AU in Tennessee, eastern...
Social-ecological resilience and law in the Platte River Basin
Hannah E. Birge, Craig R. Allen, Robin Craig, Ahjond S. Garmestani, Joseph A. Hamm, Christina Babbitt, Kristine T. Nemec, Edella Schlager
2014, Idaho Law Review (51) 229-256
Efficiency and resistance to rapid change are hallmarks of both the judicial and legislative branches of the United States government. These defining characteristics, while bringing stability and predictability, pose challenges when it comes to managing dynamic natural systems. As our understanding of ecosystems improves, we must devise ways to account...
Late 20th Century benthic foraminiferal distribution in Central San Francisco Bay, California: Influence of the Trochammina hadai invasion
Mary L. McGann
2014, Micropaleontology (60) 519-542
The distribution of foraminifera in most of San Francisco Bay is well documented, but this is not the case for the subembayment known as Central Bay. To resolve this, 55 grab samples obtained in 1998 were analyzed to characterize the foraminiferal fauna in the surface sediments of the area. Thirty-five...
The quality of our Nation's waters: Water quality in the Denver Basin aquifer system, Colorado, 2003-05
Nancy J. Bauch, MaryLynn Musgrove, Barbara Mahler, Suzanne S. Paschke
2014, Circular 1357
Availability and sustainability of groundwater in the Denver Basin aquifer system depend on water quantity and water quality. The Denver Basin aquifer system underlies about 7,000 square miles of the Great Plains in eastern Colorado and is the primary or sole source of water for domestic and public supply in...
Ice sheet load cycling and fluid underpressures in the Eastern Michigan Basin, Ontario, Canada
Christopher E. Neuzil, Alden M. Provost
2014, Journal of Geophysical Research B: Solid Earth (119) 8748-8769
Strong fluid underpressures have been detected in Paleozoic strata in the eastern Michigan Basin, with hydraulic heads reaching ~400 m below land surface (~4 MPa underpressure) and ~200 m below sea level in strata where unusually low permeabilities (~10−20–10−23 m2) were measured in situ. Multiple glaciations, including three with as much as 3 km of...
