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Comparison among model estimates of critical loads of acidic deposition using different sources and scales of input data

The critical load (CL) of acidic atmospheric deposition represents the load of acidity deposited from the atmosphere to the earth?s surface at which harmful acidification effects on sensitive biological receptors are thought to occur. In this study, the CL for forest soils was estimated for 27 watersheds throughout the United States using a steady-state mass balance...

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%22Smith%2C%20Carl%22&f%5B2%5D=author_facet%3A%22Welsh%2C%20Hart%22&f%5B3%5D=author_facet%3A%22Falk%2C%20Robert%22&f%5B4%5D=author_facet%3A%22Sun%2C%20Ge%22&f%5B5%5D=author_facet%3A%22Manter%2C%20Daniel%22&f%5B6%5D=author_facet%3A%22Mack%2C%20Erika%22

Author(s):

T.C. McDonnell; B.J. Cosby; T.J. Sullivan; S.G. McNulty; E.C. Cohen

Year:

2010

Keywords:

Acidification, Weathering, Sulfur, Critical load, Atmospheric deposition

Source:

Environmental Pollution 158:2934-2939

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.

Modeling potential evapotranspiration of two forested watersheds in the southern Appalachians

Global climate change has direct impacts on watershed hydrology through altering evapotranspiration (ET) processes at multiple scales. There are many methods to estimate forest ET with models, but the most practical and the most popular one is the potential ET (PET) based method. However, the choice of PET methods for AET estimation remains challenging. This study...

Author(s):

L.Y. Rao; G. Sun; C.R. Ford; J.M. Vose

Year:

2011

Keywords:

FAO-56 grass reference ET, Forest potential evapotranspiration, Hamon equation, Priestley-Taylor equation

Source:

American Society of Agricultural and Biological Engineers (ASABE) 54(6):2067-2078

An Improved evapotranspiration model for an apple orchard in northwestern China

Accurately estimating evapotranspiration (ET) is essential for orchard managers to design irrigation schedules and conserve water resources in semi-arid environments where water is often the limiting factor for successful production. Improving water use efficiency helps irrigation scheduling and thus benefits water resource management and the sustainability of the...

Author(s):

C. Liu; G. Sun; S. G. McNulty; S. Kang

Year:

2015

Keywords:

Apple trees, Evapotranspiration, Sap flow, Shuttleworth-Wallace model

Source:

Transactions of the ASABE

Estimates of critical acid loads and exceedances for forest soils across the conterminous United States

Concern regarding the impacts of continued nitrogen and sulfur deposition on ecosystem health has prompted the development of critical acid load assessments for forest soils. A critical acid load is a quantitative estimate of exposure to one or more pollutants at or above which harmful acidification-related effects on sensitive elements of the environment occur. A...

Author(s):

Steven G. McNulty; Erika C. Cohen; Jennifer A. Moore Myers; Timothy J. Sullivan; Harbin Li

Year:

2007

Keywords:

critical load, nitrogen, United States, forests, sulfur

Source:

Environmental Pollution, Vol. 149: 281-292

Test of partners in flight effective detection distance for Cerulean Warbler / Evaluación de distancia efectiva de detección para la Reinita Cerúlea (Dendroica cerulea) seleccionada por Compañeros En Vuelo

Estimation of population sizes of North American avian species has been attempted in the North American Landbird Conservation Plan. Such estimated numbers have considerable conservation value as starting points to estimate extinction probability, as was done for Cerulean Warbler (Dendroica cerulea) during the U.S. Fish and Wildlife Service evaluation of the petition to...

Author(s):

Paul Hamel; Melinda J. Welton; Carl G. Smith; Robert R. Ford

Year:

2008

Keywords:

Cerulean Warbler, Dendroica cerulea distance sampling, effective detection distance, population, estimation

Source:

In: Rich, Terry; Arizmendi, Coro; Thompson, Craig; Demarest, Dean eds. Tundra to Tropics: Proceedings of the 4th International Partners in Flight Conference, 13-16 Feb 2008. McAllen, Texas. p. 328-333.

Long-term potential and actual evapotranspiration of two different forests on the Atlantic Coastal Plain

A reliable estimate of potential evapotranspiration (PET) for a forest ecosystem is critical in ecohydrologic modeling related with water supply, vegetation dynamics, and climate change and yet is a challenging task due to its complexity. Based on long-term on-site measured hydro-climatic data and predictions from earlier validated hydrologic modeling studies...

Author(s):

Devendra Amatya; S. Tian; Z. Dai; Ge Sun

Year:

2016

Keywords:

Drainage, DRAINMOD-FOREST, Hargreaves-Samani, Penman-Monteith, reference evapotranspiration, streamflow, Thornthwaite water balance model.

Source:

Transactions of the ASABE

A general predictive model for estimating monthly ecosystem evapotranspiration

Accurately quantifying evapotranspiration (ET) is essential for modelling regional-scale ecosystem water balances. This study assembled an ET data set