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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,...

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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

Keyword