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A novel approach for assessing density and range-wide abundance of prairie dogs

Habitat loss, introduced disease, and government-sponsored eradication programs have caused population declines in all 5 species of prairie dogs. Black-tailed prairie dogs (Cynomys ludovicianus) currently occupy only about 2% of an extensive geographic range (160 million hectares) and were recently considered for listing under the United States...

https://www.fs.usda.gov/treesearch/search?keywords=%22estimation%22&%3Bamp%3Bf%5B0%5D=author_facet%3A%22Ouyang%2C%20Ying%22&%3Bf%5B0%5D=author_facet%3A%22Brown%2C%20Mark%22&f%5B0%5D=author_facet%3A%22Tobin%2C%20Patrick%22&f%5B1%5D=author_facet%3A%22Bian%2C%20Xindi%20%28Randy%29%22&f%5B2%5D=author_facet%3A%22Christiansen%2C%20Kelly%22&f%5B3%5D=author_facet%3A%22Nakamoto%2C%20Rodney%22&f%5B4%5D=author_facet%3A%22Popp%2C%20John%22&f%5B5%5D=author_facet%3A%22Ford%2C%20Paulette%22

Author(s):

Aaron N. Facka; Paulette L. Ford; Gary W. Roemer

Year:

2008

Keywords:

Cynomys, density, Endangered Species Act, keystone species, mark-resight, prairie dog

Source:

Journal of Mammalogy. 89(2): 356-364.

Comparison of methods for estimating the spread of a non-indigenous species

Aim: To compare different quantitative approaches for estimating rates of spread in the exotic species gypsy moth, Lymantria dispar L., using county-level presence/absence data and spatially extensive trapping grids. Location: USA. Methods: We used county-level presence/absence records of the gypsy moth?s distribution in the USA, which are available beginning in 1900,...

Author(s):

Patrick C. Tobin; Andrew M. Liebhold; E. Anderson Roberts

Year:

2007

Keywords:

biological invasions, gypsy moth, invasion modelling, invasive species, range expansion, spread

Source:

Journal of Biogeography. 34: 305?312.

Estimation of the spatial autocorrelation function: consequences of sampling dynamic populations in space and time

The estimation of spatial autocorrelation in spatially- and temporally-referenced data is fundamental to understanding an organism's population biology. I used four sets of census field data, and developed an idealized space-time dynamic system, to study the behavior of spatial autocorrelation estimates when a practical method of sampling is employed. Estimates...

Author(s):

Patrick C. Tobin

Year:

2004

Keywords:

Source:

Ecography. 27: 767-775.

Estimating spread rates of non-native species: the gypsy moth as a case study

Estimating rates of spread and generating projections of future range expansion for invasive alien species is a key process in the development of management guidelines and policy. Critical needs to estimate spread rates include the availability of surveys to characterize the spatial distribution of an invading species and the application of analytical methods to...

Author(s):

Patrick Tobin; Andrew M. Liebhold; E. Anderson Roberts; Laura M. Blackburn

Year:

2015

Keywords:

Source:

In: Venette, R.C., ed.; Pest risk modelling and mapping for invasive alien species. Wallingford, UK: CAB International: 131-144. Chapter 9.

Seasonal and among-stream variation in predator encounter rates for fish prey

Recognition that predators have indirect effects on prey populations that may exceed their direct consumptive effects highlights the need for a better understanding of spatiotemporal variation in predator?prey interactions. We used photographic monitoring of tethered Rainbow Trout Oncorhynchus mykiss and Cutthroat Trout O. clarkii to quantify predator encounter rates...

Author(s):

Bret C. Harvey; Rodney J. Nakamoto

Year:

2013

Keywords:

stream, fish, predation risk, seasonality

Source:

Transactions of the American Fisheries Society 142(3): 621-627

The cost of gypsy moth sex in the city

Since its introduction in the 1860s, gypsy moth, Lymantria dispar (L.), has periodically defoliated large swaths of forest in the eastern United States. Prior research has suggested that the greatest costs and losses from these outbreaks accrue in residential areas, but these impacts have not been well quantified. We addressed this lacuna with a case...

Author(s):

Kevin M. Bigsby; Mark J. Ambrose; Patrick C. Tobin; Erin O. Sills

Year:

2014

Keywords:

Biological invasions Economic assessment Lymantria dispar Non-native forestpests Residential impacts Urban forestry

Source:

Urban Forestry and Urban Greening

Gypsy moth sex in the city: estimating costs and losses

Author(s):

Mark Ambrose; Simone Bauch; Kevin Bigsby; Yun Wu; Patrick Tobin; Erin Sills

Year:

2009

Keywords:

Source:

In: McManus, Katherine A; Gottschalk, Kurt W., eds. Proceedings. 19th U.S. Department of Agriculture interagency research forum on invasive species 2008; 2008 January 8-11; Annapolis, MD. Gen. Tech. Rep. NRS-P-36. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 4.

Spread of beech bark disease in the eastern United States and its relationship to regional forest composition

Beech bark disease (BBD) is an insect-fungus complex involving the beech scale insect (Cryptococcus fagisuga Lind.) and one of two canker fungi. Beech scale was introduced to Halifax, Nova Scotia around 1890, presumably with the fungus Neonectria coccinea var. faginata Lohm. The disease has subsequently spread...

Author(s):

Randall S. Morin; Andrew M. Liebhold; Patrick C. Tobin; Kurt W. Gottschalk; Eugene Luzader

Year:

2007

Keywords:

Source:

Canadian Journal of Forest Research 37: 726-736.

Stream network geomorphology mediates predicted vulnerability of anadromous fish habitat to hydrologic change in southeast Alaska

In rivers supporting Pacific salmon in southeast Alaska, USA, regional trends toward a warmer, wetter climate are predicted to increase mid- and late-21st-century mean annual flood size by 17% and 28%, respectively. Increased flood size could alter stream habitats used by Pacific salmon for reproduction, with negative consequences for the substantial economic, cultural...

Author(s):

Matthew R. Sloat; Gordon H. Reeves; Kelly R. Christiansen

Year:

2016

Keywords:

Climate change, flooding, geomorphology, Pacific salmon, spawning habitat, streambed scour.

Source:

Global Change Biology

The relationship between male moth density and female mating success in invading populations of Lymantria dispar

The successful establishment of non-native species in new areas can be affected by many factors including the initial size of the founder population. Populations comprised of fewer individuals tend to be subject to stochastic forces and Allee effects (positive-density dependence), which can challenge the ability of small founder populations to establish in a new area....

Author(s):

Patrick C. Tobin; Ksenia S. Onufrieva; Kevin W. Thorpe

Year:

2012

Keywords:

Allee effect, biological invasions, invasive species, mating behavior, Lepidoptera, Lymantriidae, founder population, density

Source:

Entomologia Experimentalis et Applicata. 146(1): 103-111.

The Rangeland Vegetation Simulator: A decision support tool for monitoring and projecting grassland conditions

Rangeland landscapes occupy roughly 662 million acres in the coterminous U.S. (Reeves and Mitchell 2011) and their vegetation responds quickly to climate and management, with high relative growth rates and inter-annual variability. Current national decision support systems in the U.S. such as the Interagency Fuels Treatment Decision Support System (IFT-DSS) require...

Author(s):

Paulette L. Ford; Matt C. Reeves

Year:

2018

Keywords:

Rangeland Vegetation Simulator, vegetation, grasslands, management, habitats, lekking birds

Source:

In: Knuffman, L., ed. America’s grasslands conference: United for grassland conservation; Proceedings of the 4th biennial conference on the Conservation of America’s Grasslands; 2017 November 15-17; Fort Worth, TX. Washington, DC: National Wildlife Federation. p. 14-17.

Allee effects and pulsed invasion by the gypsy moth

Biological invasions pose considerable threats to the world's ecosystems and cause substantial economic losses. A prime example is the invasion of the gypsy moth in the United States, for which more than $194 million was spent on management and monitoring between 1985 and 2004 alone. The spread of the gypsy moth across eastern North America is, perhaps, the most...

Author(s):

Derk M. Johnson; Andrew M. Liebhold; Patrick C. Tobin; Ottar N. Bjornstad

Year:

2006

Keywords:

Source:

Nature. 444: 361-363.

Spread of Gypsy Moth (Lepidoptera: Lymantriidae) and Its Relationship to Defoliation

Gypsy moth management is divided into three components: eradication, suppression, and transition zone management. All three components require knowledge of the boundaries that delimit these areas. Additional interest is also placed on the relationship between population spread and defoliation to prepare for the gypsy moth advance in new areas and minimize its impact....

Author(s):

Patrick C. Tobin; Stefanie L. Whitmire

Year:

2005

Keywords:

Lymantria dispar, biological invasions, invasive species, forecasting

Source:

Environmental Entomology 34:1448-1455

Anthropogenic drivers of gypsy moth spread

The gypsy moth, Lymantria dispar (L.), is a polyphagous defoliator introduced to Medford, Massachusetts in 1869. It has spread to over 860,000 km² in North America, but this still only represents 1/4 of its susceptible host range in the United States. To delay defoliation in the remaining susceptible host range, the government...

Author(s):

Kevin M. Bigsby; Patrick C. Tobin; Erin O. Sills

Year:

2011

Keywords:

Anthropogenic dispersal, Lymantria dispar, firewood, non-native species, spread

Source:

Biological Invasions. 13: 2077-2090.

Site characteristics of intact shortgrass steppe in the southern Great Plains USA

Steppe, a mid-latitude, semiarid grassland has a wide global distribution. It is estimated that in the United States less than 23 percent of true shortgrass steppe still exists in native vegetation (National Grasslands Management Review Team Report, 1995). The Kiowa National Grassland long-term, 18-year, experimental fire research site is one such area. Located in the...

Author(s):

Paulette L. Ford

Year:

2011

Keywords:

drought, shortgrass steppe, soil organic matter, ground cover

Source:

In: Feldman, Susana R.; Oliva, Gabriel E.; Sacido, Monica B., eds. IX International Rangeland Congress: Diverse Rangelands for a Sustainable Society; April 3-10, 2011; Rosario, Argentina. IRC2001 Congress. p. 174.

Field evaluation of effect of temperature on release of Disparlure from a pheromone-baited trapping system used to monitor gypsy moth (Lepidoptera: Lymantriidae)

Traps baited with disparlure, the synthetic form of the gypsy moth, Lymantria dispar (L.) (Lepidoptera: Lymantriidae), sex pheromone are used to detect newly founded populations and estimate population density across the United States. The lures used in trapping devices are exposed to field conditions with varying climates, which can affect the rate...

Author(s):

Patrick C. Tobin; Aijun Zhang; Ksenia Onufrieva; Donna Leonard

Year:

2011

Keywords:

Source:

Journal of Economic Entomology. 104(4): 1265-1271.

Reduced streamflow lowers dry-season growth of rainbow trout in a small stream

A wide variety of resource management activities can affect surface discharge in small streams. Often, the effects of variation in streamflow on fish survival and growth can be difficult to estimate because of possible confounding with the effects of other variables, such as water temperature and fish density. We measured the effect of streamflow on survival and growth...

Author(s):

Bret C. Harvey; Rodney J. Nakamoto; Jason L. White

Year:

2006

Keywords:

salmonids, streamflow, growth, survival, field experiment

Source:

Transactions of the American Fisheries Society 135: 998-1005

Local-scale invasion pathways and small founder numbers in introduced Sacramento pikeminnow (Ptychocheilus grandis)

Given the general pattern of invasions with severe ecological consequences commonly resulting from multiple introductions of large numbers of individuals on the intercontinental scale, we explored an example of a highly successful, ecologically significant invader introduced over a short distance, possibly via minimal propagule pressure. The Sacramento pikeminnow (<...>

Author(s):

Andrew P. Kinziger; Rodney J. Nakamoto; Bret C. Harvey

Year:

2014

Keywords:

Invasion genetics, Effective founder number, Genetic diversity, Exotic species, Sacramento pikeminnow, Ptychocheilus grandis

Source:

Conservation Genetics. 15(1): 1-9

Southern Plains assessment of vulnerability and preliminary adaptation and mitigation strategies for farmers, ranchers, and forest land owners

The Southern Plains region contributes significantly to the Nation?s wheat and beef production. Winter wheat is the principal annual crop, with much of it serving dual-use as a cool-season annual forage in addition to grain production. Cattle are raised on extensive pasture and rangelands across the region. Agricultural production and farm income in the...

Author(s):

Jean L. Steiner; Jeanne M. Schneider; Clay Pope; Sarah Pope; Paulette Ford; Rachel F. Steele; Terry Anderson

Year:

2015

Keywords:

Southern Plains, climate change, adaption, mitigation, conservation

Source:

El Reno, OK: U.S. Department of Agriculture, Southern Plains Climate Hub, ARS Grazinglands Research Laboratory. 61 p.

Use of streambed substrate as refuge by steelhead or rainbow trout Oncorhynchus mykiss during simulated freshets

A flume was used to estimate the carrying capacity of streambed substrates for juvenile steelhead or rainbow trout Oncorhynchus mykiss seeking refuge from simulated freshets. The simulated freshets had mean water column velocities of c. 1·1?m?s^?1. The number of O. mykiss finding cover...

Author(s):

F. K. Ligon; Rodney Nakamoto; Bret Harvey; P. F. Baker

Year:

2016

Keywords:

displacement, embeddedness, flood, high flows, interstitial, velocity

Source:

Journal of Fish Biology. 88(4): 1475-1485