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Social and Behavioral Sciences Commons™
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- North Dakota (11)
- Grassland birds (10)
- Bobolink (4)
- Camera (4)
- Grassland (4)
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- Nest predators (4)
- Nest success (4)
- Savannah sparrow (4)
- Waterfowl (4)
- Carnivores (3)
- Clay-colored sparrow (3)
- Dolichonyx oryzivorus (3)
- Habitat fragmentation (3)
- Northern Great Plains (3)
- Passerculus sandwichensis (3)
- Prairie Pothole Region (3)
- Snakes (3)
- Tallgrass prairie (3)
- Anas platyrhynchos (2)
- Avian behavior (2)
- Bird density (2)
- Conservation Reserve Program (2)
- Constructed island (2)
- Cowbirds (2)
- Distance sampling (2)
- Distribution (2)
- Habitat use (2)
- Landscape composition (2)
- Le Conte's Sparrow (2)
- Mallard (2)
Articles 1 - 30 of 260
Full-Text Articles in Social and Behavioral Sciences
Nest Defense- Grassland Bird Responses To Snakes, Kevin Ellison, Christine Ribic
Nest Defense- Grassland Bird Responses To Snakes, Kevin Ellison, Christine Ribic
USGS Northern Prairie Wildlife Research Center
Predation is the primary source of nest mortality for most passerines; thus, behaviors to reduce the impacts of predation are frequently quantified to study learning, adaptation, and coevolution among predator and prey species. Video surveillance of nests has made it possible to examine real-time parental nest defense. During 1999-2009, we used video camera systems to monitor 518 nests of grassland birds. We reviewed video of 48 visits by snakes to 34 nests; 37 of these visits resulted in predation of active nests. When adult birds encountered snakes at the nest (n = 33 visits), 76% of the encounters resulted …
Identification Of Sprague's Pipit Nest Predators, Stephen K. Davis, Stephanie L. Jones, Kimberly Dohms, Teslin Holmes
Identification Of Sprague's Pipit Nest Predators, Stephen K. Davis, Stephanie L. Jones, Kimberly Dohms, Teslin Holmes
USGS Northern Prairie Wildlife Research Center
Nest predation is the primary factor influencing grassland songbird reproductive success. Understanding factors driving spatial and temporal variation in nest survival requires that we identify the primary nest predators and factors influencing predator abundance and behavior. Predation events are rarely witnessed, and the identification of nest predators is inferred, often incorrectly, from nest remains or observations of potential predators. We used video photography to identify predators of Sprague's Pipit (Anthus spragueii) nests in Saskatchewan and Montana. We monitored 60 nests in Saskatchewan and 11 nests in Montana and documented at least ten different species preying upon eggs and …
Hatching And Fledging Times From Grassland Passerine Nests, Pamela J. Pietz, D.A. Granfors, Todd Grant
Hatching And Fledging Times From Grassland Passerine Nests, Pamela J. Pietz, D.A. Granfors, Todd Grant
USGS Northern Prairie Wildlife Research Center
Accurate estimates of fledging age are needed in field studies to avoid inducing premature fledging or missing the fledging event. Both may lead to misinterpretation of nest fate. Correctly assessing nest fate and length of the nestling period can be critical for accurate calculation of nest survival rates. For researchers who mark nestlings, knowing the age at which their activities may cause young to leave nests prematurely could prevent introducing bias to their studies. We estimated fledging ages from grassland passerine nests monitored from hatching through fledging with miniature video cameras in North Dakota and Minnesota during 1996-2001. We compared …
Nocturnal Activity Of Nesting Shrubland And Grassland Passerines, Christy Slay, Kevin Ellison, C.A. Ribic, Kimberly Smith, Carolyn Schmitz
Nocturnal Activity Of Nesting Shrubland And Grassland Passerines, Christy Slay, Kevin Ellison, C.A. Ribic, Kimberly Smith, Carolyn Schmitz
USGS Northern Prairie Wildlife Research Center
Nocturnal behaviors and sleep patterns of nesting passerines remain largely undocumented in the field and are important to understanding responses to environmental pressures such as predation. We used nocturnal video recordings to describe activity and quantify behaviors of females with nestlings of four shrub land bird species and three grassland bird species (n = 19 nests). Among the shrubland birds, Blue-winged Warbler (Vermivora pinus), Prairie Warbler (Setophaga discolor), and Indigo Bunting (Passerina cyanea) returned to the nest for the night at the same time, around sunset. Among the grassland birds, Eastern Meadowlark ( …
Conservation Implications When The Nest Predators Are Known, Frank Thompson, C.A. Ribic
Conservation Implications When The Nest Predators Are Known, Frank Thompson, C.A. Ribic
USGS Northern Prairie Wildlife Research Center
Conservation and management of passerines has largely focused on habitat manipulation or restoration because the natural communities on which these birds depend have been destroyed and fragmented. However, productivity is another important aspect of avian conservation, and nest predation can be a large source of nesting mortality for passerines. Recent studies using video surveillance to identify nest predators allow researchers to start evaluating what methods could be used to mitigate nest predation to help passerines of conservation concern. From recent studies, we identified latitudinal and habitat-related patterns in the importance of predator groups that depredate passerine nests. We then reviewed …
Development Of Camera Technology For Monitoring Nests, W. Andrew Cox, M. Shane Pruett, Thomas J. Benson, Scott J. Chiavacci, Frank R. Thompson Iii
Development Of Camera Technology For Monitoring Nests, W. Andrew Cox, M. Shane Pruett, Thomas J. Benson, Scott J. Chiavacci, Frank R. Thompson Iii
USGS Northern Prairie Wildlife Research Center
Photo and video technology has become increasingly useful in the study of avian nesting ecology. However, researchers interested in using camera systems are often faced with insufficient information on the types and relative advantages of available technologies. We reviewed the literature for studies of nests that used cameras and summarized them based on study objective and the type of technology used. We also designed and tested two video systems that we used for three nest predator and behavioral studies. We found 327 studies that recorded 255 bird species spanning 19 orders. Cameras were most commonly used to study nest predators …
Knowledge Gained From Video-Monitoring Grassland Passerine Nests, P. J. Pietz, D.A. Granfors, C.A. Ribic, F. R. Thompson
Knowledge Gained From Video-Monitoring Grassland Passerine Nests, P. J. Pietz, D.A. Granfors, C.A. Ribic, F. R. Thompson
USGS Northern Prairie Wildlife Research Center
In the mid-1990s, researchers began to adapt miniature cameras to video-record activities :rt cryptic passerine nests in grasslands. In the subsequent decade, use of these video surveillance systems spread dramatically, leading to major strides in our knowledge of nest predation and nesting ecology of many species. Studies using video nest surveillance have helped overturn or substantiate many long-standing assumptions and provided insights on a wide range of topics. For example, researchers using video data have (1) identified an extensive and highly dynamic predator community in grasslands that varies both temporally (e.g., by time of day, nest age, season, year) and …
Predatory Identity Can Explain Nest Predation Patterns, Jennifer L. Reidy, Frank Thompson
Predatory Identity Can Explain Nest Predation Patterns, Jennifer L. Reidy, Frank Thompson
USGS Northern Prairie Wildlife Research Center
Knowledge of dominant predators is necessary to identify predation patterns and mitigate losses to nest predation, especially for endangered songbirds. We monitored songbird nests with time lapse infrared video cameras at Fort Hood Military Reservation, Texas, from 1997 to 2002 and 2005, and in Austin, Texas, during 2005, 2006, 2008, and 2009. Predation was the most common source of nest failure. We identified 13 species of predators during 126 predation events. Snakes were the most frequent nest predator group (n = 48), followed by birds (n = 25), fire ants (n = 22), cowbirds (n = 15), …
Bird Productivity And Nest Predation In Agricultural Grasslands, C.A. Ribic, Michael Guzy, Travis Anderson, David Sample, Jamie Nack
Bird Productivity And Nest Predation In Agricultural Grasslands, C.A. Ribic, Michael Guzy, Travis Anderson, David Sample, Jamie Nack
USGS Northern Prairie Wildlife Research Center
Effective conservation strategies for grassland birds in agricultural landscapes require understanding how nesting success varies among different grassland habitats. A key component to this is identifying nest predators and how these predators vary by habitat. We quantified nesting activity of obligate grassland birds in three habitats [remnant prairie, cool-season grass Conservation Reserve Program (CRP) fields, and pastures) in southwest Wisconsin, 2002-2004. We determined nest predators using video cameras and examined predator activity using track stations. Bobolink (Dolichonyx oryzivorus) and Henslow's Sparrow (Ammodramus henslowii) nested primarily in CRP fields, and Grasshopper Sparrow (A. savannarum) in …
Spring-Migration Ecology Of Northern Pintails In South-Central Nebraska, Aaron T. Pearse, Gary L. Krapu, Robert R. Cox Jr., Bruce E. Davis
Spring-Migration Ecology Of Northern Pintails In South-Central Nebraska, Aaron T. Pearse, Gary L. Krapu, Robert R. Cox Jr., Bruce E. Davis
USGS Northern Prairie Wildlife Research Center
Spring-migration ecology of staging Northern Pintails, Anas acuta, was investigated in south-central Nebraska, USA. Habitat associations, local movements, settling patterns, arrival dates, residency times and survival were estimated from 71 radiomarked pintails during spring 2001, 2003 and 2004, and diet determined from 130 females collected during spring 1998 and 1999. Seventy-two percent of pintail diurnal locations were in palustrine wetlands, 7% in riverine wetlands, 3% in lacustrine wetlands, 6% in municipal sewage lagoons and irrigation reuse pits and 10.5% in croplands. Emergent wetlands with hemi-marsh conditions were used diurnally more often than wetlands with either open or closed vegetation …
Body Size And Predatory Performance In Wolves: Is Bigger Better?, Daniel R. Macnulty, Douglas W. Smith, L. David Mech, Lynn E. Eberly
Body Size And Predatory Performance In Wolves: Is Bigger Better?, Daniel R. Macnulty, Douglas W. Smith, L. David Mech, Lynn E. Eberly
USGS Northern Prairie Wildlife Research Center
Summary
1. Large body size hinders locomotor performance in ways that may lead to trade-offs in predator foraging ability that limit the net predatory benefit of larger size. For example, size-related improvements in handling prey may come at the expense of pursuing prey and thus negate any enhancement in overall predatory performance due to increasing size.
2. This hypothesis was tested with longitudinal data from repeated observations of 94 individually known wolves (Canis lupus) hunting elk (Cervus elaphus) in Yellowstone National Park, USA. Wolf size was estimated from an individually based sex-specific growth model derived from …
Wolf Use Of Summer Territory In Northeastern Minnesota, Dominic J. Demma, L. David Mech
Wolf Use Of Summer Territory In Northeastern Minnesota, Dominic J. Demma, L. David Mech
USGS Northern Prairie Wildlife Research Center
Movements of wolves (Canis lupus) during summer 2003 and 2004 in the Superior National Forest were based around homesites but included extensive use of territories. Away from homesites, wolves used different areas daily, exhibiting rotational use. Mean daily range overlap was 22% (SE = 0.02) and that of breeding wolves was significantly greater than for nonbreeders (x = 25% and 16%, respectively). Rotational use may improve hunting success. Managers seeking to remove entire packs must maintain control long enough to ensure that all pack members are targeted.
Vulnerability Of Rehabilitated Agricultural Production Systems To Invasion By Nontarget Plant Species, Sara G. Baer, David M. Engle, Johannes M. H. Knops, Kenneth A. Langeland, Bruce D. Maxwell, Fabian D. Menalled, Amy J. Symstad
Vulnerability Of Rehabilitated Agricultural Production Systems To Invasion By Nontarget Plant Species, Sara G. Baer, David M. Engle, Johannes M. H. Knops, Kenneth A. Langeland, Bruce D. Maxwell, Fabian D. Menalled, Amy J. Symstad
USGS Northern Prairie Wildlife Research Center
Vast areas of arable land have been retired from crop production and ‘‘rehabilitated’’ to improved system states through landowner incentive programs in the United States (e.g., Conservation and Wetland Reserve Programs), as well as Europe (i.e., Agri-Environment Schemes). Our review of studies conducted on invasion of rehabilitated agricultural production systems by nontarget species elucidates several factors that may increase the vulnerability of these systems to invasion. These systems often exist in highly fragmented and agriculturally dominated landscapes, where propagule sources of target species for colonization may be limited, and are established under conditions where legacies of past disturbance persist and …
Feeding Ecology Of Arctic-Nesting Sandpipers During Spring Migration Through The Prairie Pothole Region, Jan Eldridge, Gary Krapu, Douglas Johnson
Feeding Ecology Of Arctic-Nesting Sandpipers During Spring Migration Through The Prairie Pothole Region, Jan Eldridge, Gary Krapu, Douglas Johnson
USGS Northern Prairie Wildlife Research Center
We evaluated food habits of 4 species of spring-migrant calidrid sandpipers in the Prairie Pothole Region (PPR) of North Dakota. Sandpipers foraged in several wetland classes and fed primarily on aquatic dipterans, mostly larvae, and the midge family Chironomidae was the primary food eaten. Larger sandpiper species foraged in deeper water and took larger larvae than did smaller sandpipers. The diverse wetland habitats that migrant shorebirds use in the PPR suggest a landscape-level approach be applied to wetland conservation efforts. We recommend that managers use livestock grazing and other tools, where applicable, to keep shallow, freshwater wetlands from becoming choked …
Role Of Invasive Melilotus Officinalis In Two Native Plant Communities, Laura C. Van Riper, Diane Larson
Role Of Invasive Melilotus Officinalis In Two Native Plant Communities, Laura C. Van Riper, Diane Larson
USGS Northern Prairie Wildlife Research Center
This study examines the impact of the exotic nitrogen-fixing legume Melilotus officinalis (L.) Lam. on native and exotic species cover in two Great Plains ecosystems in Badlands National Park, South Dakota. Melilotus is still widely planted and its effects on native ecosystems are not well studied. Melilotus could have direct effects on native plants, such as through competition or facilitation. Alternatively, Melilotus may have indirect effects on natives, e.g., by favoring exotic species which in turn have a negative effect on native species. This study examined these interactions across a 4-year period in two contrasting vegetation types: Badlands sparse vegetation …
Chapter 2: Long-Term Research On Wolves In The Superior National Forest, L. David Mech
Chapter 2: Long-Term Research On Wolves In The Superior National Forest, L. David Mech
USGS Northern Prairie Wildlife Research Center
The seeds for the blossoming of the wolf (Canis lupus) population throughout the upper Midwest were embodied in a long line of wolves that had persisted in the central part of the Superior National Forest (SNF) of northeastern Minnesota, probably since the retreat of the last glaciers. This line of wolves had withstood not only the various natural environmental factors that had shaped them through their evolution but also the logging, fires, market hunting of prey animals, and even the bounties, aerial hunting, and poisoning that had exterminated their ancestors and their dispersed offspring only a few wolf …
Elk Calf Survival And Mortality Following Wolf Restoration To Yellowstone National Park, Shannon M. Barber-Meyer, L. David Mech, P. J. White
Elk Calf Survival And Mortality Following Wolf Restoration To Yellowstone National Park, Shannon M. Barber-Meyer, L. David Mech, P. J. White
USGS Northern Prairie Wildlife Research Center
We conducted a 3-year study (May 2003–Apr 2006) of mortality of northern Yellowstone elk (Cervus elaphus) calves to determine the cause for the recruitment decline (i.e., 33 calves to 13 calves/100 adult F) following the restoration of wolves (Canis lupus). We captured, fit with radiotransmitters, and evaluated blood characteristics and disease antibody seroprevalence in 151 calves ≤6 days old (68M:83F). Concentrations (x, SE) of potential condition indicators were as follows: thyroxine (T4; 13.8 μg/dL, 0.43), serum urea nitrogen (SUN; 17.4 mg/dL, 0.57), γ-glutamyltransferase (GGT; 66.4 IU/L, 4.36), gamma globulins (GG; 1.5 g/dL, 0.07), and insulin-like growth …
Amphiod Densities And Indices Of Wetland Quality Across The Upper-Midwest, Usa, Michael J. Anteau, Alan D. Afton
Amphiod Densities And Indices Of Wetland Quality Across The Upper-Midwest, Usa, Michael J. Anteau, Alan D. Afton
USGS Northern Prairie Wildlife Research Center
Nutritional, behavioral, and diet data for lesser scaup (Aythya affinis [Eyton, 1838]) indicates that there has been a decrease in amphipod (Gammarus lacustris [G. O. Sars, 1863] and Hyalella azteca [Saussure, 1858]) density and wetland quality throughout the upper-Midwest, USA. Accordingly, we estimated densities of Gammarus and Hyalella in six eco-physiographic regions of Iowa, Minnesota, and North Dakota; 356 randomly selected semi-permanent and permanent wetlands were sampled during springs 2004 and 2005. We also examined indices of wetland quality (e.g., turbidity, fish communities, aquatic vegetation) among regions in a random subset of these wetlands (n = 267). Gammarus …
Soil Modification By Invasive Plants: Effects On Native And Invasive Species Of Mixed-Grass Prairies, Nicholas R. Jordan, Diane L. Larson, Sheri C. Huerd
Soil Modification By Invasive Plants: Effects On Native And Invasive Species Of Mixed-Grass Prairies, Nicholas R. Jordan, Diane L. Larson, Sheri C. Huerd
USGS Northern Prairie Wildlife Research Center
Invasive plants are capable of modifying attributes of soil to facilitate further invasion by conspecifics and other invasive species. We assessed this capability in three important plant invaders of grasslands in the Great Plains region of North America: leafy spurge (Euphorbia esula), smooth brome (Bromus inermis) and crested wheatgrass (Agropyron cristatum). In a glasshouse, these three invasives or a group of native species were grown separately through three cycles of growth and soil conditioning in both steam-pasteurized and non-pasteurized soils, after which we assessed seedling growth in these soils. Two of the three invasive …
Using Plasma-Lipid Metabolites To Index Changes In Lipid Reserves Of Free-Living Lesser Scaup (Aythya Affinis), Michael Anteau, Alan Afton
Using Plasma-Lipid Metabolites To Index Changes In Lipid Reserves Of Free-Living Lesser Scaup (Aythya Affinis), Michael Anteau, Alan Afton
USGS Northern Prairie Wildlife Research Center
Understanding daily lipid-reserve changes in migrating wild birds is important for habitat assessment and species conservation. Plasma-lipid metabolites have been used to estimate rates of lipid accumulation or catabolism in small-bodied wild birds(<75 g), but this has not been validated for larger-bodied wild birds such as waterfowl. We developed an index for detecting whether individual birds accumulate or catabolize lipid reserves by regressing plasma-lipid metabolite levels(triglyceride and β-hydroxybutyrate) and known one-day mass changes(daily mass change) of 22 free-living Lesser Scaup (Aythya affinis; a larger-bodied species with typical mass range 600–1,000 g). Triglyceride and β-hydroxybutyrate predicted 75% of the variation in daily mass change (F = 28.85, df = 2 and 19, P < 0.001). Triglyceride was positively correlated (P = 0.029) with mass change, and β-hydroxybutyrate was negatively cor¬related (P < 0.001) with mass change (daily mass change = –54.49+ 11.82 [triglyceride] – 28.65 [β-hydroxybutyrate log]). Our results in¬dicate that triglyceride and β-hydroxybutyrate can estimate one-day changes in mass of free-living wild Lesser Scaup, which provides an index to daily changes in lipid reserves and should be useful for assessing quality of migration habitat.
Comparing Local Vs. Global Visible And Near-Infrared (Visnir) Diffuse Reflectance Spectroscopy (Drs) Calibrations For The Prediction Of Soil Clay, Organic C And Inorganic C, Joel B. Sankey, David J. Brown, Melisa L. Bernard, Rick L. Lawrence
Comparing Local Vs. Global Visible And Near-Infrared (Visnir) Diffuse Reflectance Spectroscopy (Drs) Calibrations For The Prediction Of Soil Clay, Organic C And Inorganic C, Joel B. Sankey, David J. Brown, Melisa L. Bernard, Rick L. Lawrence
USGS Northern Prairie Wildlife Research Center
Local, field-scale, VisNIR-DRS soil calibrations generally yield the most accurate predictions but require a substantial number of local calibration samples at every application site. Global to regional calibrations are more economically efficient, but don't provide sufficient accuracy for many applications. In this study, we quantified the value of augmenting a large global spectral library with relatively few local calibration samples for VisNIR-DRS predictions of soil clay content (clay), organic carbon content (SOC), and inorganic carbon content (IC). VisNIR models were constructed with boosted regression trees employing global, local+global, and local spectral data, using local samples from two low-relief, sedimentary bedrock …
Restoration Of Mangrove Plantations And Colonisation By Native Species In Leizhou Bay, South China, Hai Ren, Shuguang Jian, Hongfang Lu, Qianmei Zhang, Weijun Shen, Weidong Han, Zuoyun Yin, Qinfeng Guo
Restoration Of Mangrove Plantations And Colonisation By Native Species In Leizhou Bay, South China, Hai Ren, Shuguang Jian, Hongfang Lu, Qianmei Zhang, Weijun Shen, Weidong Han, Zuoyun Yin, Qinfeng Guo
USGS Northern Prairie Wildlife Research Center
To examine the natural colonization of native mangrove species into remediated exotic mangrove stands in Leizhou Bay, South China, we compared soil physical–chemical properties, community structure and recruitments of barren mangrove areas, native mangrove species plantations, and exotic mangrove species—Sonneratia apetala Buch.Ham—between plantations and natural forest. We found that severely degraded mangrove stands could not regenerate naturally without human intervention due to severely altered local environments, whereas some native species had been recruited into the 4–10 year S. apetala plantations. In the first 10 years, the exotic species S. apetala grew better than native species such as Rhizophora stylosa …
Crying Wolf: Concluding That Wolves Were Not Restored, L. David Mech
Crying Wolf: Concluding That Wolves Were Not Restored, L. David Mech
USGS Northern Prairie Wildlife Research Center
In 2007, the USA removed (delisted) the grey wolf (Canis lupus) in the upper Midwest from the Endangered Species List. After 35 years of being considered endangered, these wolves had increased from 750 in 38 400 km2 of Minnesota (Fuller et al. 1992) to over 4100 inhabiting 110 000 km2 of Minnesota, Wisconsin, and Michigan. Conservationists celebrated this event as a most significant success. Suddenly, however, this milestone was challenged by Leonard & Wayne (2007) based on preliminary genetic findings that wolves of the upper Midwest 100 years ago were different from 69 per cent of the …
Effectiveness Of Lethal, Directed Wolf-Depredation Control In Minnesota, Elizabeth Harper, William J. Paul, L. David Mech, Sanford Weisberg
Effectiveness Of Lethal, Directed Wolf-Depredation Control In Minnesota, Elizabeth Harper, William J. Paul, L. David Mech, Sanford Weisberg
USGS Northern Prairie Wildlife Research Center
Wolf (Canis lupus) depredations on livestock in Minnesota, USA, are an economic problem for many livestock producers, and depredating wolves are lethally controlled. We sought to determine the effectiveness of lethal control through the analysis of data from 923 government-verified wolf depredations from 1979 to 1998. We analyzed the data by 1) assessing the correlations between the number of wolves killed in response to depredations with number of depredations the following year at state and local levels, and 2) the time to the next depredation. No analysis indicated that trapping wolves substantially reduced the following year’s depredations at …
Impact Of West Nile Virus And Other Mortality Factors On American White Pelicans At Breeding Colonies In The Northern Plains Of North America, Marsha A. Sovada, Pamela J. Pietz, Kathryn A. Converse, D. Tommy King, Erik K. Hofmeister, Paulette Scherr, Hon S. Ip
Impact Of West Nile Virus And Other Mortality Factors On American White Pelicans At Breeding Colonies In The Northern Plains Of North America, Marsha A. Sovada, Pamela J. Pietz, Kathryn A. Converse, D. Tommy King, Erik K. Hofmeister, Paulette Scherr, Hon S. Ip
USGS Northern Prairie Wildlife Research Center
American white pelicans (Pelecanus erythrorhynchos) are colonial-nesting birds and their breeding sites are concentrated in a few small areas, making this species especially vulnerable to factors that can influence productivity, such as disease, disturbance, predation, weather events and loss of nesting habitat. Nearly half of the American white pelican population breeds at four colonies in the northern plains: Chase Lake National Wildlife Refuge (NWR) in North Dakota, Bitter Lake (Waubay NWR) in South Dakota, Medicine Lake NWR in Montana, and Marsh Lake in Minnesota. Thus, sustained productivity at these colonies is crucial to the health of the entire …
Prairie Pothole Regional Studies, Robert A. Gleason
Prairie Pothole Regional Studies, Robert A. Gleason
USGS Northern Prairie Wildlife Research Center
The U.S. Geological Survey (USGS) conducted a comprehensive, stratified survey of 204 wetland catchments in 1997 and 270 catchments in 2004, a subset of more than 2 million hectares of wetland and grassland systems established on Conservation Reserve Program (CRP) and Wetlands Reserve Program (WRP) lands. The purpose of the survey was to gather data for estimating a variety of ecosystem services provided by prairie pothole wetland catchments. In early 2008, USGS published a preliminary findings report as a result of these studies.
Diets Of Lesser Scaup During Spring Migration Throughout The Upper-Midwest Are Consistent With The Spring Condition Hypothesis, Michael J. Anteau, Alan Afton
Diets Of Lesser Scaup During Spring Migration Throughout The Upper-Midwest Are Consistent With The Spring Condition Hypothesis, Michael J. Anteau, Alan Afton
USGS Northern Prairie Wildlife Research Center
The spring condition hypothesis (SCH) states that the current decline of the North American scaup population (Lesser [Aythya affinis] and Greater Scaup [A. marila] combined) is due to a decline in quality or availability of scaup foods on wintering, spring migration, or breeding areas that has caused a reduction in female body condition and subsequent reproductive success. Our previous research indicated that forage quality in diets of Lesser Scaup (hereafter scaup) at two sites in Northwestern Minnesota was lower in springs 2000-2001 than that reported for springs 1986-1988, consistent with the SCH. Accordingly, we further tested …
A Two-Part Measure Of Degree Of Invasion For Cross-Community Comparisons, Qinfeng Guo, Amy Symstad
A Two-Part Measure Of Degree Of Invasion For Cross-Community Comparisons, Qinfeng Guo, Amy Symstad
USGS Northern Prairie Wildlife Research Center
Invasibility is a critical feature of ecological communities, especially for management decisions. To date, invasibility has been measured in numerous ways. Although most researchers have used the richness (or number) of exotic species as a direct or indirect measure of community invasibility, others have used alternative measures such as the survival, density, or biomass of either a single or all exotic species. These different measures, even when obtained from the same communities, have produced inconsistent results and have made comparisons among communities difficult. Here, we propose a measure of the degree of invasion (DI) of a community as a surrogate …
Long-Term Dynamics Of Leafy Spurge (Euphorbia Esula) And Its Biocontrol Agent, Flea Beetles In The Genus Aphthona, Diane L. Larson, James B. Grace, Jennifer L. Larson
Long-Term Dynamics Of Leafy Spurge (Euphorbia Esula) And Its Biocontrol Agent, Flea Beetles In The Genus Aphthona, Diane L. Larson, James B. Grace, Jennifer L. Larson
USGS Northern Prairie Wildlife Research Center
Three flea beetle species (Aphthona spp.), first introduced into North America in 1988, have come to be regarded as effective biological control organisms for leafy spurge (Euphorbia esula). The black flea beetles (Aphthona lacertosa and A. czwalinae) in particular have been shown to cause reductions in leafy spurge stem counts in the northern Great Plains, while the brown flea beetle (A. nigriscutis) has persisted and spread, but has not been found to be as effective at controlling leafy spurge. The ability of black flea beetles to control leafy spurge in any given year, …
Ecosystem Services Derived From Wetland Conservation Practices In The United States Prairie Pothole Region With An Emphasis On The U.S. Department Of Agriculture Conservation Reserve And Wetlands Reserve Programs, Robert A. Gleason, Murray K. Laubhan, Brian A. Tangen, Kevin E. Kermes
Ecosystem Services Derived From Wetland Conservation Practices In The United States Prairie Pothole Region With An Emphasis On The U.S. Department Of Agriculture Conservation Reserve And Wetlands Reserve Programs, Robert A. Gleason, Murray K. Laubhan, Brian A. Tangen, Kevin E. Kermes
USGS Northern Prairie Wildlife Research Center
Contents:
Chapter A Background and Approach to Quantification of Ecosystem Services By Robert A. Gleason and Murray K. Laubhan
Chapter B Plant Community Quality and Richness By Murray K. Laubhan and Robert A. Gleason
Chapter C Carbon Sequestration By Robert A. Gleason, Brian A. Tangen, and Murray K. Laubhan
Chapter D Floodwater Storage By Robert A. Gleason and Brian A. Tangen
Chapter E Reduction of Sedimentation and Nutrient Loading By Brian A. Tangen and Robert A. Gleason
Chapter F Proposed Approach to Assess Potential Wildlife Habitat Suitability on Program Lands By Murray K. Laubhan, Kevin E. Kermes, and Robert A. …