Vegetation-Radiation Relationships in Mountainous Terrain: Eucalypt-Dominated Vegetation in the Risdon Hills, Tasmania

Kirkpatrick, J. B.; Núñez, M.

doi:10.2307/2844711

Cited by 65 publications

(28 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some authors have also correlated other measurements with slope aspect, such as species diversity (Kirkpatrick and Nunez, 1980;Kutiel, 1992;Enright et al, 1994), soil nutrient status (Kutiel, 1992;Rezaei and Gilkes, 2005), soil surface cover (Kutiel et al, 1998), post-fire erosion (Marques and Mora, 1992), and weathering process and intensity (Fanzemier et al, 1969;Davis, 1976;Rech et al, 2001;Hall et al, 2005;Turkington and Paradise, 2005). Differences resulting from slope aspect may influence changes of soil water content.…”

Section: Site Conditions and Water Contentmentioning

confidence: 96%

Soil desiccation for Loess soils on natural and regrown areas

Wang

Wei³

et al. 2008

Forest Ecology and Management

166

110

View full text Add to dashboard Cite

Section: Site Conditions and Water Contentmentioning

confidence: 96%

Soil desiccation for Loess soils on natural and regrown areas

Wang

Wei³

et al. 2008

Forest Ecology and Management

166

110

View full text Add to dashboard Cite

“…In the southern hemisphere, places with a northeast solar orientation have greater Sun exposure and consequently a higher rate of evapotranspiration, resulting in the occurrence of vegetation with xerophytic characteristics. Conversely, slopes facing south-southeast, especially during the winter, are exposed to less sunlight (Kirkpatrick et al, 1988;Kirkpatrick and Nunez, 1980). To explore this relationship, aspect-modified maps were created in this study.…”

Section: Topographic Variablesmentioning

confidence: 99%

Occurrence and abundance models of threatened plant species: Applications to mitigate the impact of hydroelectric power dams

Guarino

Barbosa

Waechter

2012

Ecological Modelling

View full text Add to dashboard Cite

In situ and ex situ plant conservation Environmental assessment Model validation a b s t r a c t Species occurrence and abundance models are important tools that can be used in biodiversity conservation, and can be applied to predict or plan actions needed to mitigate the environmental impacts of hydropower dams. In this study our objectives were: (i) to model the occurrence and abundance of threatened plant species, (ii) to verify the relationship between predicted occurrence and true abundance, and (iii) to assess whether models based on abundance are more effective in predicting species occurrence than those based on presence-absence data. Individual representatives of nine species were counted within 388 randomly georeferenced plots (10 m × 50 m) around the Barra Grande hydropower dam reservoir in southern Brazil. We modelled their relationship with 15 environmental variables using both occurrence (Generalised Linear Models) and abundance data (Hurdle and Zero-Inflated models). Overall, occurrence models were more accurate than abundance models. For all species, observed abundance was significantly, although not strongly, correlated with the probability of occurrence. This correlation lost significance when zero-abundance (absence) sites were excluded from analysis, but only when this entailed a substantial drop in sample size. The same occurred when analysing relationships between abundance and probability of occurrence from previously published studies on a range of different species, suggesting that future studies could potentially use probability of occurrence as an approximate indicator of abundance when the latter is not possible to obtain. This possibility might, however, depend on life history traits of the species in question, with some traits favouring a relationship between occurrence and abundance. Reconstructing species abundance patterns from occurrence could be an important tool for conservation planning and the management of threatened species, allowing scientists to indicate the best areas for collection and reintroduction of plant germplasm or choose conservation areas most likely to maintain viable populations.

show abstract

“…Variability in elevation, slope, slope orientation (azimuth or aspect), and shadowing, can create strong local gradients in solar radiation that directly and indirectly affect such biophysical processes as air and soil heating, energy and water balances, and primary production (Geiger 1965, Holland and Steyn 1975, Gates 1980, Kirkpatrick and Nunez 1980, Davis er al. 1989, Dubayah er al.…”

Section: Introductionmentioning

confidence: 99%

Topographic solar radiation models for GIS

Dubayah

Rich

1995

International journal of geographical information systems

336

210

View full text Add to dashboard Cite

Abstract. Incident solar radiation at the Earth's surface is the result of a complex interaction of energy between the atmosphere and the surface. Recently much progress has been made towards the creation of accurate, physically-based solar radiation formulations that can model this interaction over topographic and other surfaces (such as plant canopies) for a large range of spatial and temporal scales. In this paper we summarize our current work on solar radiation models and their implementation within both GIS and image processing systems. An overview of the effects of topography and plant canopies on solar radiation is presented along with a discussion of various options for obtaining the data necessary to drive specific solar radiation models. Examples are given from our own work using two models, ATM (Atmospheric and Topographic Model), a model based within an image processing framework, and SOLARFLUX, a GIS-based model. We consider issues of design, including CIS implementation and interface, computational problems, and error propagation.

show abstract

Vegetation-Radiation Relationships in Mountainous Terrain: Eucalypt-Dominated Vegetation in the Risdon Hills, Tasmania

Cited by 65 publications

References 11 publications

Soil desiccation for Loess soils on natural and regrown areas

Soil desiccation for Loess soils on natural and regrown areas

Occurrence and abundance models of threatened plant species: Applications to mitigate the impact of hydroelectric power dams

Topographic solar radiation models for GIS

Contact Info

Product

Resources

About