Quantifying vegetation and nekton response to tidal restoration of a New England salt marsh
Charles T. Roman, Kenneth B. Raposa, Susan C. Adamowicz, Mary-Jane James-Pirri, J. G. Catena
2002, Restoration Ecology (10) 450-460
Tidal flow to salt marshes throughout the northeastern United States is often restricted by roads, dikes, impoundments, and inadequately sized culverts or bridge openings, resulting in altered ecological structure and function. In this study we evaluated the response of vegetation and nekton (fishes and decapod crustaceans) to restoration of full...
The effects of polychlorinated biphenyls (Aroclor 1242) on thyroxine, estradiol, molt, and plumage characteristics in the American kestrel (Falco sparverius)
M.J. Quinn, J.B. French, F.M.A. McNabb, M. A. Ottinger
2002, Environmental Toxicology and Chemistry (21) 1417-1422
The purpose of this experiment was to determine the effects of Aroclor 1242, a mixture of polychlorinated biphenyls (PCBs), on plumage characteristics and molt in the American kestrel, Falco sparverills. Several characteristics of plumage. including color and molt schedule, are modulated by hormonal signals and hence may be modified by...
Seasonal distribution and abundance of fishes and decapod crustaceans in a Cape Cod estuary
K.W. Able, M.P. Fahay, K.L. Heck, C. T. Roman, M.A. Lazzari, S.C. Kaiser
2002, Northeastern Naturalist (9) 285-302
Sampling in several habitat types (sand/mud, eelgrass, sand, gravel, macroalgae/mud) during all seasons with a variety of gears in Nauset Marsh, Massachusetts during 1985-1987 found a fauna consisting of 35 fish and 10 decapod crustacean species. Although most of the abundant species were found in several habitat types, species richness...
Immunological and physiological effects of chronic exposure of Peromyscus leucopus to Aroclor 1254 at a concentration similar to that found at contaminated sites
M. Segre, S.M. Arena, E.H. Greeley, M. J. Melancon, D.A. Graham, J.B. French
2002, Toxicology (174) 163-172
Polychlorinated biphenyls (PCBs) are environmental contaminants known to cause adverse health effects to biological systems. Limited data are available on their effects on the immune system of wildlife species. Previously, we found that 4 and 6-week-old white-footed mice (Peromyscus leucopus) born from dams injected with a single dose (300 mg/kg)...
Determining the trophic guilds of fishes and macroinvertebrates in a seagrass food web
J.J. Luczkovich, G.P. Ward, James C. Johnson, R.R. Christian, D. Baird, H. Neckles, W.M. Rizzo
2002, Estuaries (25) 1143-1163
We established trophic guilds of macroinvertebrate and fish taxa using correspondence analysis and a hierarchical clustering strategy for a seagrass food web in winter in the northeastern Gulf of Mexico. To create the diet matrix, we characterized the trophic linkages of macroinvertebrate and fish taxa. present in Hatodule wrightii seagrass...
Book review: Bird census techniques, Second edition
John R. Sauer
2002, Condor (104) 698-701
Conservation concerns, federal mandates to monitor birds, and citizen science programs have spawned a variety of surveys that collect information on bird populations. Unfortunately, all too frequently these surveys are poorly designed and use inappropriate counting methods. Some of the flawed approaches reflect a lack of understanding of statistical design;...
New observations of the Peregrine Falcon (Falco peregrinus) in Peru
M. Kery
2002, Journal of Raptor Research (36) 213-217
The systematic status of the Italian wolf Canis lupus
Ronald M. Nowak, Nicholas E. Federoff
2002, Acta Theriologica (47) 333-338
In the past, the gray wolf Canis lupus Linnaeus, 1758, has been recognized in Italy as either the subspecies lupus or italicus. It has also been postulated that this population has undergone introgression from the domestic dog Canis familiaris. In order to clarify these issues, multistatistical analyses were made of...
Blood selenium concentrations and enzyme activities related to glutathione metabolism in wild emperor geese
J. Christian Franson, David J. Hoffman, Joel A. Schmutz
2002, Environmental Toxicology and Chemistry (21) 2179-2184
In 1998, we collected blood samples from 63 emperor geese (Chen canagica) on their breeding grounds on the Yukon-Kuskokwim Delta (YKD) in western Alaska, USA. We studied the relationship between selenium concentrations in whole blood and the activities of glutathione peroxidase and glutathione reductase in plasma. Experimental studies have shown...
Can non-breeding be a cost of breeding dispersal?
E. Danchin, E. Cam
2002, Behavioral Ecology and Sociobiology (51) 153-163
Breeding habitat selection and dispersal are crucial processes that affect many components of fitness. Breeding dispersal entails costs, one of which has been neglected: dispersing animals may miss breeding opportunities because breeding dispersal requires finding a new nesting site and mate, two time- and energy-consuming activities. Dispersers are expected to...
Slaty-backed Gull in Sullivan Co., NY
V. Freer, J. Haas, P. A. Buckley
2002, Kingbird (51) 114-118
An adult Slaty-backed Gull (Larus schistisagus) was found and photographed at Neversink Reservoir, Sullivan Co., NY on 20 February 2002. A native of northeastern Eurasia and northern Japan, this species is rare along the Bering coast of Alaska, and there are only a handful of scattered records in the...
Nineteenth century mercury hazard to wading birds and cormorants of the Carson River, Nevada
Charles J. Henny, E. F. Hill, D. J. Hoffman, M. G. Spalding, R. A. Grove
2002, Ecotoxicology (11) 213-231
Contemporary mercury interest relates to atmospheric deposition, contaminated fish stocks and exposed fish-eating wildlife. The focus is on methylmercury (MeHg) even though most contamination is of inorganic (IoHg) origin. However, IoHg is readily methylated in aquatic systems to become more hazardous to vertebrates. In response to a classic episode of...
Demography of a population collapse: The Northern Idaho ground squirrel (Spermophilus brunneus brunneus)
P. W. Sherman, M.C. Runge
2002, Ecology (83) 2816-2831
We studied the demography of a population of Northern Idaho ground squirrels (Spermophilus brunneus brunneus) in Adams Co., Idaho. The population was completely censused yearly from 1987 to 1999, during which time it declined from 272 to 10 animals. The finite population growth rate, based on a Leslie matrix model...
Spatio-temporal dynamics of species richness in coastal fish communities
K. Lekve, T. Boulinier, N. C. Stenseth, J. Gjosaeter, J-M. Fromentin, J.E. Hines, J.D. Nichols
2002, Proceedings of the Royal Society B: Biological Sciences (269) 1781-1789
Determining patterns of change in species richness and the processes underlying the dynamics of biodiversity are of key interest within the field of ecology, but few studies have investigated the dynamics of vertebrate communities at a decadal temporal scale. Here, we report findings on the spado-temporal variability in the...
Re-evaluating Bay-breasted Warbler breeding range: Nine-years presence in Lower Michigan
Kevin Ellison, Paul W. Sykes, Carol I. Bocetti
2002, The Wilson Bulletin (114) 415-416
he breeding range of the Bay-breasted Warbler (Dendroica castanea) is thought to include only the northernmost portions of six northeastern and northcentral states in the United States. During a 10-year banding study of Kirtland's Warblers (Dendroica kirtlandii) in northern Lower Michigan, we caught 44 Bay-breasted Warblers outside of...
Atlantic Flyway review: Piedmont-Coastal Plain, Region IV, Fall 2001
Chandler S. Robbins
2002, North American Bird Bander (27) 97-100
The Hollywood, Butler Island, and Wekiva Basin stations did not operate this year, but we welcome back Jekyll Island, GA, with its flagship species, Western Palm Warbler (835); and we are glad to have a report from Rock Springs Run State Reserve in Florida to replace the Wekiva Station. Except...
Indicators of wetland condition for the Prairie Pothole Region of the United States
Glenn R. Guntenspergen, S.A. Peterson, S.G. Leibowitz, L.M. Cowardin
2002, Environmental Monitoring and Assessment (78) 229-252
We describe a study designed to evaluate the performance ofwetland condition indicators of the Prairie Pothole Region (PPR)of the north central United States. Basin and landscape scaleindicators were tested in 1992 and 1993 to determine theirability to discriminate between the influences of grasslanddominated and cropland dominated landscapes in the PPR....
Moving from the individual to the population level in environmental risk assessments
W. N. Beyer, D. Audet
2002, SETAC Globe (3) 28-29
Proposal for adaptive management to conserve biotic integrity in a regulated segment of the Tallapoosa River, Alabama, U.S.A
Elise R. Irwin, Mary C. Freeman
2002, Conservation Biology (16) 1212-1222
Conserving river biota will require innovative approaches that foster and utilize scientific understanding of ecosystem responses to alternative river-management scenarios. We describe ecological and societal issues involved in flow management of a section of the Tallapoosa River (Alabama, U.S.A.) in which a species-rich native fauna is adversely affected by...
Narrowing historical uncertainty: probabilistic classification of ambiguously identified tree species in historical forest survey data
D.J. Mladenoff, S.E. Dahir, E.V. Nordheim, L.A. Schulte, G.R. Guntenspergen
2002, Ecosystems (5) 539-553
Historical data have increasingly become appreciated for insight into the past conditions of ecosystems. Uses of such data include assessing the extent of ecosystem change; deriving ecological baselines for management, restoration, and modeling; and assessing the importance of past conditions on the composition and function of current systems....
Management practices that concentrate visitor activities: Camping impact management at Isle Royale National Park, USA
Jeffrey L. Marion, T. A. Farrell
2002, Journal of Environmental Management (66) 201-212
This study assessed campsite conditions and the effectiveness of campsite impact management strategies at Isle Royale National Park, USA. Protocols for assessing indicators of vegetation and soil conditions were developed and applied to 156 campsites and 88 shelters within 36 backcountry campgrounds. The average site was 68 m2 and 83% of sites...
The Protected Areas Visitor Impact Management (PAVIM) framework: A simplified process for making management decisions
T. A. Farrell, Jeffrey L. Marion
2002, Journal of Sustainable Tourism (10) 31-51
Ecotourism and protected area visitation in Central and South America have resulted in ecological impacts, which some protected areas managers have addressed by employing visitor impact management frameworks. In this paper, we propose the Protected Area Visitor Impact Management (PAVIM) framework as an alternative to carrying capacity and other frameworks...
Evaluation of canoe surveys for anurans along the Rio Grande in Big Bend National Park, Texas
Robin E. Jung, K. E. Bonine, M. L. Rosenshield, A. de la Reza, S. Raimondo, Sam Droege
2002, Journal of Herpetology (36) 390-397
Surveys for amphibians along large rivers pose monitoring and sampling problems. We used canoes at night to spotlight and listen for anurans along four stretches of the Rio Grande in Big Bend National Park, Texas, in 1998 and 1999. We explored temporal and spatial variation in amphibian counts and species...
Trail impacts and trail impact management related to ecotourism visitation at Torres del Paine National Park, Chile
T. A. Farrell, J. L. Marion
2002, Leisure/Loisir (26) 31-59
Protected area visitation and ecotourism in Central and South America are largely dependent upon a relatively undisturbed quality of natural resources. However, visitation may impact vegetation, soil, water, and wildlife resources, and degrade visitor facilities such as recreation sites and trails. Findings are reported from trail impact research conducted at...
Prey of the Peregrine Falcon (Falco peregrinus cassini) in Southern Argentina and Chile
D. H. Ellis, B.A. Sabo, J.K. Fackler, B.A. Millsap
2002, Journal of Raptor Research (36) 315-319
The Peregrine Falcon (Falco peregrinus cassini) in Patagonia attracted wide interest two decades ago when there was a focus on determining the taxonomic position of the Pallid Falcon (also called Kleinschmidt's falcon and Tierra del Fuego falcon; formerly named Falco kreyenborgi). In 1981, however, the pallid falcon was confirmed...
