scholarly journals Modeling elk and bison carrying capacity for Great Sand Dunes National Park, Baca National Wildlife Refuge, and The Nature Conservancy's Medano Ranch, Colorado

2015 ◽  
Author(s):  
Gary Wockner ◽  
Randall Boone ◽  
Kathryn A. Schoenecker ◽  
Linda C. Zeigenfuss
Keyword(s):  
Carrying Capacity ◽  
National Park ◽  
Sand Dunes ◽  
National Wildlife Refuge ◽  
Wildlife Refuge

scholarly journals Notice: The authors have discovered an error in raw data analyzed in this paper. This article has been retracted. The corrected article is published online early as Ringelman KM, Williams CK, Castelli PM, Sieges ML, Longenecker RA, Nichols TC, Earsom AD. 2018. Estimating waterfowl carrying capacity at local scales: A case study from Edwin B. Forsythe National Wildlife Refuge, New Jersey. Journal of Fish and Wildlife Management 9(1):xx-xx; e1944-687X. doi:10.3996/082017-JFWM-066.

2017 ◽  
Vol 8 (1) ◽  
pp. 209-218
Author(s):  
Kevin M. Ringelman ◽  
Christopher K. Williams ◽  
Paul M. Castelli ◽  
Mason L. Sieges ◽  
Rebecca A. Longenecker ◽  
...  
Keyword(s):  
New Jersey ◽  
Carrying Capacity ◽  
Standard Error ◽  
Energy Demand ◽  
Population Level ◽  
High Marsh ◽  
Level Energy ◽  
National Wildlife Refuge ◽  
Time Activity ◽  
Wildlife Refuge

Abstract The management of wintering North American waterfowl is based on the premise that the amount of foraging habitat can limit populations. To estimate carrying capacity of winter habitats, managers use bioenergetic models to quantify energy (food) availability and energy demand, and use results as planning tools to meet regional conservation objectives. Regional models provide only coarse estimates of carrying capacity because habitat area, habitat energy values, and temporal trends in population-level demand are difficult to quantify precisely at large scales. We took advantage of detailed data previously collected on wintering waterfowl at Edwin B. Forsythe National Wildlife Refuge and surrounding marsh, New Jersey, USA, and created a well-constrained local model of carrying capacity. We used 1,223 core samples collected between 2006 and 2015 to estimate available food. We used species-specific 24-h time-activity data collected between 2011 and 2013 to estimate daily energy expenditure, morphometrically corrected for site- and day-specific thermoregulatory costs. To estimate population-level energy demand, we used standardized monthly ground-surveys (2005–2014) to create a migration curve, and proportionally scaled that to fit aerial survey data (2005–2014). Crucially, we also explicitly incorporated estimates of variance in all of these parameters and conducted a sensitivity analysis to diagnose the most important sources of variation in the model. Our results indicated that at estimated mean levels of supply (2.34 × 109 kcal) and cumulative demand (3.4 × 109 kcal), refuge resources were depleted before the end of the wintering season. However, at one standard error greater in supply and one standard error less in demand, 1.33 × 109 kcal remained on the landscape at the end of winter. Variation in model output appeared to be driven primarily by uncertainty in food abundance in high marsh habitats. This model allows for relative assessment of biases and uncertainties in carrying capacity modeling, and serves as a framework identifying critical science needs to improve local and regional waterfowl management planning.

scholarly journals Estimating Waterfowl Carrying Capacity at Local Scales: A Case Study From Edwin B. Forsythe National Wildlife Refuge, New Jersey1

2018 ◽  
Vol 9 (1) ◽  
pp. 106-116 ◽  
Author(s):  
Kevin M. Ringelman ◽  
Christopher K. Williams ◽  
Paul M. Castelli ◽  
Mason L. Sieges ◽  
Rebecca A. Longenecker ◽  
...  
Keyword(s):  
Food Availability ◽  
Carrying Capacity ◽  
Energy Demand ◽  
Temporal Trends ◽  
Population Level ◽  
Level Energy ◽  
National Wildlife Refuge ◽  
Activity Data ◽  
Time Activity ◽  
Wildlife Refuge

Abstract The management of wintering North American waterfowl is based on the premise that the amount of foraging habitat can limit populations. To estimate carrying capacity of winter habitats, managers use bioenergetic models to quantify energy (food) availability and energy demand, and use results as planning tools to meet regional conservation objectives. Regional models provide only coarse estimates of carrying capacity because habitat area, habitat energy values, and temporal trends in population-level demand are difficult to quantify precisely at large scales. We took advantage of detailed data previously collected on wintering waterfowl at Edwin B. Forsythe National Wildlife Refuge and surrounding marsh, New Jersey, and created a well-constrained local model of carrying capacity. We used 1,223 core samples collected between 2006 and 2015 to estimate food availability. We used species-specific 24-h time–activity data collected between 2011 and 2013 to estimate daily energy expenditure, morphometrically corrected for site- and day-specific thermoregulatory costs. To estimate population-level energy demand, we used standardized monthly ground surveys (2005–2014) to create a migration curve, and proportionally scaled that to fit aerial survey data (2005–2014). Crucially, we also explicitly incorporated estimates of variance in all of these parameters and conducted a sensitivity analysis to diagnose the most important sources of variation in the model. Our results from an outlier-removed, a strict depletion model indicated that at estimated mean levels of supply (923 million kcal) and cumulative demand (3.4 billion kcal), refuge food resources were depleted before November. However, a constant-supply model that represented tidal replenishment of resources indicated that just enough energy was present to sustain peak winter populations. Variation in model output appeared to be driven primarily by uncertainty in population abundance during peak periods of use, emphasizing a new management focus on studying migration chronologies of waterfowl. This model allows for relative assessment of biases and uncertainties in carrying-capacity modeling, and serves as a framework identifying critical science needs to improve local and regional waterfowl management planning.

Nocturnal Velvet Ants (Hymenoptera: Mutillidae) of Joshua Tree National Park, Riverside County, California with the description of three new species

Zootaxa ◽  
2017 ◽  
Vol 4319 (2) ◽  
pp. 329
Author(s):  
EMILY A. SADLER ◽  
JAMES P. PITTS ◽  
JOSEPH S. WILSON
Keyword(s):  
New Species ◽  
National Park ◽  
Sand Dunes ◽  
Test Site ◽  
Nevada Test Site ◽  
National Wildlife Refuge ◽  
Riverside County ◽  
Joshua Tree National Park ◽  
New Synonym ◽  
Three New Species

The diversity of nocturnal velvet ants at Joshua Tree National Park (JTNP) is investigated along with seasonal activity. The diversity of velvet ants found at JTNP is compared to the diversity of velvet ants found at the Algodones Sand Dunes, Philip L. Boyd Deep Canyon Desert Research Center, Ash Meadows National Wildlife Refuge and the Nevada Test Site. Diagnoses and a key are provided for the velvet ants of JTNP. Forty-one species in six genera, based on 10,202 specimens collected from a transect of 14 sampling sites transitioning from the Mojave to the Sonoran deserts, are found to inhabit areas in and around the park. Odontophotopsis dalyi, O. odontoloxia and Photomorphus schoenwerthi are described as new species. Odontophotopsis (Odontophotopsis) ambigua Mickel (1983) is a junior synonym of O. delodonta Viereck (1904), new synonym. The females of too few of the species are known, so only the males are treated. A key to all of the species and illustrations for those species not previously illustrated are provided for the males. 

scholarly journals Greater Yellowstone climate assessment: past, present, and future climate change in greater Yellowstone watersheds

2021 ◽  
Author(s):  
Steven Hostetler ◽  
◽  
Cathy Whitlock ◽  
Bryan Shuman ◽  
David Liefert ◽  
...  
Keyword(s):  
National Parks ◽  
National Park ◽  
Future Climate Change ◽  
National Forests ◽  
National Wildlife Refuge ◽  
Federal Lands ◽  
Wildlife Refuge ◽  
South Central ◽  
The Us ◽  
Greater Yellowstone

The Greater Yellowstone Area (GYA) is one of the last remaining large and nearly intact temperate ecosystems on Earth (Reese 1984; NPSa undated). GYA was originally defined in the 1970s as the Greater Yellowstone Ecosystem, which encompassed the minimum range of the grizzly bear (Schullery 1992). The boundary was enlarged through time and now includes about 22 million acres (8.9 million ha) in northwestern Wyoming, south central Montana, and eastern Idaho. Two national parks, five national forests, three wildlife refuges, 20 counties, and state and private lands lie within the GYA boundary. GYA also includes the Wind River Indian Reservation, but the region is the historical home to several Tribal Nations. Federal lands managed by the US Forest Service, the National Park Service, the Bureau of Land Management, and the US Fish and Wildlife Service amount to about 64% (15.5 million acres [6.27 million ha] or 24,200 square miles [62,700 km2]) of the land within the GYA. The federal lands and their associated wildlife, geologic wonders, and recreational opportunities are considered the GYA’s most valuable economic asset. GYA, and especially the national parks, have long been a place for important scientific discoveries, an inspiration for creativity, and an important national and international stage for fundamental discussions about the interactions of humans and nature (e.g., Keiter and Boyce 1991; Pritchard 1999; Schullery 2004; Quammen 2016). Yellowstone National Park, established in 1872 as the world’s first national park, is the heart of the GYA. Grand Teton National Park, created in 1929 and expanded to its present size in 1950, is located south of Yellowstone National Park1 and is dominated by the rugged Teton Range rising from the valley of Jackson Hole. The Gallatin-Custer, Shoshone, Bridger-Teton, Caribou-Targhee, and Beaverhead-Deerlodge national forests encircle the two national parks and include the highest mountain ranges in the region. The National Elk Refuge, Red Rock Lakes National Wildlife Refuge, and Grays Lake National Wildlife Refuge also lie within GYA.

scholarly journals Recreational Carrying Capacity of Lake Umbagog National Wildlife Refuge

2010 ◽  
Vol 1 (2) ◽  
pp. 175-182 ◽  
Author(s):  
Robert Manning ◽  
William Valliere ◽  
Jeffrey Hallo
Keyword(s):  
New Hampshire ◽  
Carrying Capacity ◽  
Normative Theory ◽  
Quality Monitoring ◽  
Visitor Experience ◽  
National Wildlife Refuge ◽  
Wildlife Refuge ◽  
Management Actions ◽  
Indicator Variables

Abstract Recreational carrying capacity addresses the issue of how much and what types of recreation can be accommodated in parks and related areas without unacceptable impacts. Contemporary approaches to carrying capacity rely on formulation, monitoring, and management of indicators and standards of quality. Recreational carrying capacity of Lake Umbagog National Wildlife Refuge, located in northern New Hampshire and Maine, was analyzed using visitor surveys that employed normative theory and methods and visual simulations of a range of recreation-related conditions. Study findings suggest that indicators of quality for the visitor experience include the number of boats seen on Lake Umbagog and associated rivers, the size of boating groups, the minimum acceptable chance of seeing selected types of wildlife, and the minimum acceptable chance of catching selected types of fish. Study findings also suggest a range of standards of quality for these indicators. Recreational carrying capacity of Lake Umbagog National Wildlife Refuge can be managed by using study findings to guide formulation of indicators and standards of quality, monitoring indicator variables, and taking management actions to ensure that standards of quality are maintained.

Cactus Carvings and Desert Defecations: Embodying Representations of Border Crossings in Protected Areas on the Mexico—US Border

10.1068/d75j ◽  
2007 ◽  
Vol 25 (4) ◽  
pp. 727-744 ◽  
Author(s):  
Juanita Sundberg ◽  
Bonnie Kaserman
Keyword(s):  
United States ◽  
Protected Areas ◽  
National Park ◽  
Undocumented Immigrants ◽  
The United States ◽  
Border Crossings ◽  
National Wildlife Refuge ◽  
Wildlife Refuge ◽  
Media Institutions

Recent strategies to enforce the United States boundary with Mexico have shifted undocumented immigrants into remote lands federally designated as protected areas (as in national park or national wildlife refuge). Government and media institutions represent such entries as a threat to nature. In this paper we argue that representations and interpretations of threats to nature in border-protected areas are laden with identity attachments. In repeatedly defining that which is threatened as ‘American’, such discourses work to draw boundaries around the nation, thereby narrating inclusion and exclusion.

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