Craig WeidemanRhodes University | RU · Department of Environmental Science
Craig Weideman
MSc. Environmental Science
About
13
Publications
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45
Citations
Citations since 2017
Introduction
Additional affiliations
June 2012 - August 2016
Publications
Publications (13)
Supply and demand for ESs are often unevenly distributed in space, and the ability to derive
robust, spatially explicit measures of both is therefore key to effective planning and
management. In the case of ecotourism, optimal management strategies at a tourism
destination are theoretically those that seek to align the use of ecotourism resources w...
Summary of Project for Ecosystem Services (ProEcoServ) achievements in San Pedro de Atacama, Chile. ProEcoServ, a GEF funded project implemented in four countries including South Africa, Vietnam, Trinidad and Tobago and Chile, seeks to explore innovative mechanisms for mainstreaming the ecosystem services agenda into development decisions.
Accurately measuring evapotranspiration (ET) is essential if we are to derive reasonable estimates of production and water use for semi-arid savannas. Estimates of ET are also important in defining the health of an ecosystem and the quantity of water used by the vegetation when preparing a catchment-scale water balance. We derived ET0 from an autom...
Accurately measuring evapotranspiration (ET) is essential if we are to
derive reasonable estimates of production and water use for semi-arid
savannas. Estimates of ET are also important in defining the health of an ecosystem and the quantity of water used by the vegetation when
preparing a catchment-scale water balance. We derived ET0 from an autom...
Harvesting of non-timber forest products is an integral component of rural livelihoods throughout the developing world. At
times this is at odds with conservation objectives. Reconciliation of the two requires examination of local level contexts
and needs. This paper reports on the harvesting needs for Ischyrolepis by a rural community in South Afr...
Questions
Questions (3)
Hi, can anyone tell me how to conduct a basic one at a time sensitivity analysis (for criteria weights, although also ideally for criteria themselves) in Excel for a spatial Multi Criteria Analysis problem? Thanks in advance.
The ability to confidently characterise and quantify links between ecosystem structure, functions and services, and how these respond to perturbation - particularly where multiple ESs interact - seems to still represent a significant challenge for science. Ecological production functions (EPFs) have recently been explored as one way to map and quantify these dynamics - does anyone have any insights into what role EPFs will/might play in resolving these questions in the near future? I'd appreciate any feedback, thanks!
Hi.
I have developed an index of suitability for a specified land use activity based on a spatial multi criteria analysis approach (continuous raster dataset with values 0-255); additionally, we have empirical data showing where this activity presently occurs and the intensity at which it occurs (present use) (also normalised continuous raster 0-255). The assumption is that this virtual space has not yet been fully exploited, either spatially or in terms of intensity, for this activity. Given this assumption, the problem is how to statistically describe the agreement (or lack of) between the empirical (present use) and predicted suitability datasets? This seems identical to an invasive species habitat modelling problem, where comprehensive presence and absence data may not available (where a habitat has not yet been fully exploited) to evaluate model output (false presences/absences (?)) - any ideas how I could deal with this in my example?
Thanks in advance for any advice.
Projects
Project (1)
