Status and trends in atmospheric deposition and emissions near Atlanta, Georgia, 1986-99
N.E. Peters, T.P. Meyers, Brent T. Aulenbach
2002, Atmospheric Environment (36) 1577-1588
Wet and dry atmospheric deposition were investigated from weekly data, 1986-99 (1986-97 for dry deposition) at the Panola Mountain Research Watershed (PMRW), a forested research site 25 km, southeast of Atlanta, Georgia. Furthermore, the wet deposition was compared to that at three adjacent National Atmospheric Deposition Program's National Trends Network...
The influence of sylvatic plague on North American wildlife at the landscape level, with special emphasis on black-footed ferret and prairie dog conservation
M.F. Antolin, P. Gober, Bob Luce, D. E. Biggins, W.E. van Pelt, D.B. Seery, M. Lockhart, M. Ball
2002, Conference Paper, Transactions of the 67th North American Wildlife and Natural Resources Conference
No abstract available....
Water level, specific conductance, and water temperature data, San Francisco Bay, California, for Water Year 2000
P.A. Buchanan
2002, Interagency Ecological Program Newsletter (15) 22-26
Time series of water-level, specific-conductance, and watertemperature data were collected at seven sites in San Francisco Bay during water year 2000 (October 1, 1999 through September 30, 2000). Water-level data were recorded only at Point San Pablo. Specific-conductance and water-temperature data were recorded at 15-minute intervals at the following locations...
Beyond theories of plant invasions: Lessons from natural landscapes
Thomas J. Stohlgren
2002, Comments on Theoretical Biology (7) 355-379
There are a growing number of contrasting theories about plant invasions, but most are only weakly supported by small-scale field experiments, observational studies, and mathematical models. Among the most contentious theories is that species-rich habitats should be less vulnerable to plant invasion than species-poor sites, stemming from earlier theories that...
Americans' attitudes toward wolves and wolf reintroduction: An annotated bibliography
Christine Browne-Nunez, Jonathan G. Taylor
2002, Information and Technology Report 2002-0002
During the period 1974-2000, 50 reports were published in peer-reviewed journals and in theses and dissertations concerning public altitudes and preferences toward wolves and their reinstatement into previously occupied habitat in the continental U.S. This publication provides annotated synopses of these 50 reports, arranged chronologically, but also cross-referenced by authors...
Assessing vulnerability to invasion by nonnative plant species at multiple spatial scales
T.J. Stohlgren, G.W. Chong, L. D. Schell, K.A. Rimar, Yuka Otsuki, M. Lee, M. A. Kalkhan, C.A. Villa
2002, Environmental Management (29) 566-577
Basic information on where nonnative plant species have successfully invaded is lacking. We assessed the vulnerability of 22 vegetation types (25 sets of four plots in nine study areas) to nonnative plant invasions in the north–central United States. In general, habitats with high native species richness were more heavily invaded...
Plant diversity and invasives in blue oak savannas of the southern Sierra Nevada,
Jon E. Keeley
2002, General Technical Report PSW-GTR-184
No abstract available at this time...
Lost, a desert river and its native fishes: A historical perspective of the lower Colorado River
Gordon A. Mueller, Paul C. Marsh
2002, Information and Technology Report 2002-0010
The Colorado River had one of the most unique fish communities in the world. Seventy-five percent of those species were found no where else in the world. Settlement of the lower basin brought dramatic changes to both the river and its native fish. Those changes began more than 120 years...
Neotropical migratory bird monitoring study at Marine Corps Base Camp Pendleton, California. 2001 Annual Report
B.E. Kus, B.L. Sharp
2002, Report
No abstract available at this time...
Does food availability affect energy expenditure rates of nesting seabirds? A supplemental-feeding experiment with Black-Legged Kittiwakes (Rissa tridactyla)
Patrick G.R. Jodice, Daniel D. Roby, Scott A. Hatch, Verena A. Gill, Richard B. Lanctot, G. Henk Visser
2002, Canadian Journal of Zoology (80) 214-222
We used a supplemental-feeding experiment, the doubly labeled water technique, and a model-selection approach based upon the Akaike Information Criterion to examine effects of food availability on energy expenditure rates of Black-legged Kittiwakes (Rissa tridactyla) raising young. Energy expenditure rates of supplementally fed females (n = 14) and males (n...
Nutrient limitation, hydrology and watershed nitrogen loss
Steven S. Perakis
2002, Hydrological Processes (16) 3507-3511
No abstract available....
Terrestrial Vertebrate Inventory, Point Reyes National Seashore, 1998 - 2001
Gary M. Fellers, David Pratt
2002, Report
No abstract available at this time...
Floristic quality assessment of one natural and three restored wetland complexes in North Dakota, USA
David M. Mushet, Ned H. Euliss Jr., Terry L. Shaffer
2002, Wetlands (22) 126-138
Floristic quality assessment is potentially an important tool for conservation efforts in the northern Great Plains of North America, but it has received little rigorous evaluation. Floristic quality assessments rely on coefficients assigned to each plant species of a region’s flora based on the conservatism of each species relative to...
Response of a subarctic salt marsh plant community to grubbing and grazing by captive lesser snow geese
Amy B. Zacheis, Jerry W. Hupp, Roger W. Ruess
2002, Écoscience (9) 320-331
Foraging intensity and faecal inputs are important determinants of plant community response to herbivory. We used captive adult lesser snow geese (Anser caerulescens caerulescens), which feed on both above- and below-ground plant tissues, to manipulate foraging intensity and faecal inputs to plots in a sedge meadow in spring, 1996. We...
Alpha1-antitrypsin polymorphism and systematics of eastern North American wolves
L. David Mech, Nicholas E. Federoff
2002, Canadian Journal of Zoology (80) 961-963
We used data on the polymorphic status of α1-antitrypsin (α1AT) to study the relationship of Minnesota wolves to the gray wolf (Canis lupus), which was thought to have evolved in Eurasia, and to red wolves (Canis rufus) and coyotes (Canis latrans), which putatively evolved in North America. Recent evidence had...
Tracking Spring Migration of Northern Pintails with Satellite Telemetry. Progress Report 2002
M. R. Miller, John Y. Takekawa, D.L. Orthmeyer, J. P. Fleskes, Michael L. Casazza, W.M. Perry
2002, Report
No abstract available at this time...
Hydrologic variability and the application of Index of Biotic Integrity metrics to wetlands: a Great Lakes evaluation
Douglas A. Wilcox, James E. Meeker, Patrick L. Hudson, Brian J. Armitage, M. Glen Black, Donald G. Uzarski
2002, Wetlands (22) 588-615
Interest by land-management and regulatory agencies in using biological indicators to detect wetland degradation, coupled with ongoing use of this approach to assess water quality in streams, led to the desire to develop and evaluate an Index of Biotic Integrity (IBI) for wetlands that could be used to categorize the...
Hydrogeologic framework, ground-water geochemistry, and assessment of nitrogen yield from base flow in two agricultural watersheds, Kent County, Maryland
L. J. Bachman, D.E. Krantz, J.K. Bohlke
2002, Report
Hydrostratigraphic and geochemical data collected in two adjacent watersheds on the Delmarva Peninsula, in Kent County, Maryland, indicate that shallow subsurface stratigraphy is an important factor that affects the concentrations of nitrogen in ground water discharging as stream base flow. The flux of nitrogen from shallow aquifers can contribute substantially...
Sample size requirements for in situ vegetation and substrate classifications in shallow, natural Nebraska Lakes
C.P. Paukert, D.W. Willis, R.S. Holland
2002, North American Journal of Fisheries Management (22) 1329-1333
We assessed the precision of visual estimates of vegetation and substrate along transects in 15 shallow, natural Nebraska lakes. Vegetation type (submergent or emergent), vegetation density (sparse, moderate, or dense), and substrate composition (percentage sand, muck, and clay; to the nearest 10%) were estimated at 25-70 sampling sites per lake...
Composition of cavity-nesting bird communities in montane aspen woodland fragments: The roles of landscape context and forest structure
J.J. Lawler, T.C. Edwards Jr.
2002, Condor (104) 890-896
We compared cavity-nesting bird communities in aspen (Populus tremuloides) woodland fragments classified on the basis of vegetation structure (tree density) and landscape context (surrounding vegetation). We found very few cavity nesters in fragments predominantly surrounded by forests. Fragments adjacent to meadows contained more species and a greater abundance of cavity...
Fish mortality and physicochemistry in a managed floodplain wetland
J. C. Sargent, David L. Galat
2002, Wetlands Ecology and Management (10) 115-121
Patterns of fish mortality and associated physicochemical factors were studied during late spring in a managed wetland canal along the lower Missouri River, Missouri. Mean dawn dissolved oxygen was lower and mean un-ionized ammonia and turbidity were higher during the fish kill than before or after the kill, or than...
Remotely sensed geology from lander-based to orbital perspectives: Results of FIDO rover May 2000 field tests
B. Jolliff, A. Knoll, R.V. Morris, J. Moersch, H. McSween, M. Gilmore, R. Arvidson, R. Greeley, Kenneth E. Herkenhoff, S. Squyres
2002, Journal of Geophysical Research E: Planets (107)
Blind field tests of the Field Integration Design and Operations (FIDO) prototype Mars rover were carried out 7-16 May 2000. A Core Operations Team (COT), sequestered at the Jet Propulsion Laboratory without knowledge of test site location, prepared command sequences and interpreted data acquired by the rover. Instrument sensors included...
Anthropogenic vs. natural pollution: An environmental study of an industrial site under remediation (Naples, Italy)
M. Tarzia, B. de Vivo, R. Somma, R. A. Ayuso, R.A.R. McGill, R.R. Parrish
2002, Geochemistry: Exploration, Environment, Analysis (2) 45-56
Heavy metal concentrations and Pb isotopic composition were determined in the soils, slags, scums and landfill materials from a shut down industrial (brownfield) site. This was the second largest integrated steelworks in Italy, and is now under remediation by a Government project. It is located in the outskirts of Napoli...
Defining the desert tortoise(s):Our first priority for a coherent conservation strategy
K.H. Berry, D.J. Morafka, R. W. Murphy
2002, Chelonian Conservation and Biology (4) 249-262
Seasonal and diel habitat selection by bluegills in a shallow natural lake
C.P. Paukert, D.W. Willis
2002, Transactions of the American Fisheries Society (131) 1131-1139
Habitat use by bluegill Lepomis macrochirus may be dictated by the avoidance of predators and the availability of prey. Previous work suggests that bluegills large enough to avoid predators will select habitats based on foraging profitability. However, these studies focused on smaller fish (<150 mm standard length) in laboratory experiments...
