Rainfall, soil moisture, increasing temperature and changes in vegetation cover are the most important parameters effecting drought. Therefore, analysis of vegetation fraction and soil spectral signature, especially in red and infra red bands, are essential in drought estimation using remote sensing. In this study, Modified Perpendicular Drought Index (MPDI), which uses Vegetation Fraction (VF)...

Abstract One basic method of improving rangelands in a country is the use of native as well as exotic species of plants adaptable. Among the but introduced species, Atriplex canescens has been introduced in many rangelands, but it is important and necessary to consider it’s effects on native species. In the current study the effect of chemical competition (allelopathy) of Atriplex canescens o...

The rangelands of Africa have been subject to substantial changes. changes in the savanna ecology were often assessed from different points view. This study constructs perceptions Boorana pastoralists on historic post-1992 based Gadaa timelines. construction pastoralist can make an immense contribution comprehending rate, trends, indicators, and impacts rangeland degradation rangelands. thus ou...

The purpose of this study was to evaluate the species-environment relationships in arid and semi-arid rangelandsof Nodushan, Yazd. The plant species cover and the environmental variables were measured at 9 sites. Soil sampleswere taken for measurement of 12 attributes in 0-10 cm and 10-80 cm layers. Vegetation was classified using twowayindicator species analysis (TWINSPAN). Data was analyzed u...

The negative effect of soil erosion and compaction is well documented for the purpose optimum rangeland functioning, while impact degradation on effective depth seldom quantified. aim this study was to quantify response vegetation cover properties, particularly texture degradation. Forty-one farms were sampled in arid semi-arid climate South Africa. Within these farms, data collected over a gra...

Land degradation is one of the most significant environmental problems in the semi-arid and arid savannas of Southern Africa. Degradation affects vegetation structure, cover and patchiness and this result in the loss of vegetation resources used by rural populations (grazing, fuel wood, and other non-timber forest products) and wildlife. Land degradation processes are influenced by rainfall, la...

Abstract Grazing exclusion has been proved to be an effective approach for naturally restoring degraded rangelands. Still, the effect of this management practice on plant community composition and structure is ambiguous, especially under prolonged repeated drought events. Here, we investigated responses (i.e. incidence-based) abundance-based) short-term sheep grazing severe episode in arid step...

Effective grazing management in Australia’s semi-arid rangelands requires monitoring landscape conditions and identifying sustainable productive practice through understanding the interactions of environmental factors soil health. Challenges include extreme rainfall variability, intensifying drought, inherently nutrient-poor soils. We investigated impacts strategies on function—specifically hea...