Vegetation change, erosion risk and land management on the Nullarbor Plain, Australia

Gillieson, David; Wallbrink, Peter; Cochrane, Amanda

doi:10.1007/s002540050087

Cited by 27 publications

(18 citation statements)

References 6 publications

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“…So people have to over-exploit land for subsistence, so as to lead to serious land degradation in the form of karst rocky desertification. The karst landscape degeneration caused by the human activity proposes restoration challenges and opportunity to study stability and resistively of limestone ecosystem (Gillieson et al 1996), therefore, more attention is now being given by both the government and the public (Yuan 1997; The Chinese Academy of Sciences 2003; Wang et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Relationships between rocky desertification and spatial pattern of land use in typical karst area, Southwest China

Jiang

Groves

et al. 2009

Environ Earth Sci

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Karst rocky desertification is a typical type of land degradation in the Southwest China. An attempt was made to study quantitatively the relationships between rocky desertification and spatial pattern of land use through applying spatial analysis of Geographical Information System in Nandong underground river system, a typical karst area, Southwest China. The spatial distribution of rocky desertification and spatial pattern of land use were obtained from interpreting Landsat Images in Nandong area in 2007 by supervised classifications, and verified and rectified through field survey. The results indicate that: (1) the total land deserted area covers 378.3 km 2 , or 23.4% of the total area, of which intense, moderate and slight rocky desertification covers 269.46, 54.2, and 54.63 km 2 , respectively, in Nandong area. (2) There is an obvious effect of spatial pattern of land use on rocky desertification. With the increase of elevation and slope, there is a higher occurrence ratio of rocky desertification in the cultivated land and grass land. Also, more than half of total rocky desertification was dominated within the areas of 4 km from the construction land, and 97% of total rocky desertification was dominated within the areas of 10 km from the construction land in Nandong area. And what can be known from the data is that the primary effect distance of human on rocky desertification from the construction land is 4 km, and the farthest effect distance of human on rocky desertification from the construction land is 10 km in Nandong area.

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Section: Introductionmentioning

confidence: 99%

Relationships between rocky desertification and spatial pattern of land use in typical karst area, Southwest China

Jiang

Groves

et al. 2009

Environ Earth Sci

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“…Currently, about 25% of Earth's population lives on or near karst areas (Ford and Williams 2007), and the increasing exploitation of karst resources (e.g., water and building materials) is causing severe environmental degradation and unsustainable resource use (Drew and Hötzl 1999;Gunn 2004;Bou Kheir et al 2008;Parise et al 2009;De Waele et al 2011;Peng et al 2013). In addition, the desertification of karst landscapes (i.e., karst rocky desertification, KRD), which is defined as a process of soil erosion, bedrock exposure, and reduction of land productivity, will most likely continue to increase (Drew 1983;Gillieson et al 1996;Li et al 2009;De Waele et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Using principal component analysis and annual seasonal trend analysis to assess karst rocky desertification in southwestern China

Zhang

Ouyang

Xiao

et al. 2017

Environ Monit Assess

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Increasing exploitation of karst resources is causing severe environmental degradation because of the fragility and vulnerability of karst areas. By integrating principal component analysis (PCA) with annual seasonal trend analysis (ASTA), this study assessed karst rocky desertification (KRD) within a spatial context. We first produced fractional vegetation cover (FVC) data from a moderate-resolution imaging spectroradiometer normalized difference vegetation index using a dimidiate pixel model. Then, we generated three main components of the annual FVC data using PCA. Subsequently, we generated the slope image of the annual seasonal trends of FVC using median trend analysis. Finally, we combined the three PCA components and annual seasonal trends of FVC with the incidence of KRD for each type of carbonate rock to classify KRD into one of four categories based on K-means cluster analysis: high, moderate, low, and none. The results of accuracy assessments indicated that this combination approach produced greater accuracy and more reasonable KRD mapping than the average FVC based on the vegetation coverage standard. The KRD map for 2010 indicated that the total area of KRD was 78.76 × 10 3 km 2 , which constitutes about 4.06% of the eight southwest provinces of China. The largest KRD areas were found in Yunnan province. The combined PCA and ASTA approach was demonstrated to be an easily implemented, robust, and flexible method for the mapping and assessment of KRD, which can be used to enhance regional KRD management schemes or to address assessment of other environmental issues.

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“…Erosion is strongly linked to land degradation in drylands (Lal, 2003;Ravi et al, 2010), and this is the case in Australian rangelands (Bui et al, 2011;Dregne, 1995;Gillieson et al, 1996;Webb et al, 2009). A database of erosion was used to better understand the nature of the degradation that was detected.…”

Section: Land Capability Classificationmentioning

confidence: 99%

Degradation of net primary production in a semiarid rangeland

Jackson

Prince

2016

Biogeosciences

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Abstract. Anthropogenic land degradation affects many biogeophysical processes, including reductions of net primary production (NPP). Degradation occurs at scales from small fields to continental and global. While measurement and monitoring of NPP in small areas is routine in some studies, for scales larger than 1 km 2 , and certainly global, there is no regular monitoring and certainly no attempt to measure degradation. Quantitative and repeatable techniques to assess the extent of deleterious effects and monitor changes are needed to evaluate its effects on, for example, economic yields of primary products such as crops, lumber, and forage, and as a measure of land surface properties which are currently missing from dynamic global vegetation models, assessments of carbon sequestration, and land surface models of heat, water, and carbon exchanges. This study employed the local NPP scaling (LNS) approach to identify patterns of anthropogenic degradation of NPP in the Burdekin Dry Tropics (BDT) region of Queensland, Australia, from 2000 to 2013. The method starts with land classification based on the environmental factors presumed to control (NPP) to group pixels having similar potential NPP. Then, satellite remotely sensing data were used to compare actual NPP with its potential. The difference in units of mass of carbon and percentage loss were the measure of degradation. The entire BDT (7.45 × 10 6 km 2 ) was investigated at a spatial resolution of 250 × 250 m. The average annual reduction in NPP due to anthropogenic land degradation in the entire BDT was −2.14 MgC m −2 yr −1 , or 17 % of the non-degraded potential, and the total reduction was −214 MgC yr −1 . Extreme average annual losses of 524.8 gC m −2 yr −1 were detected. Approximately 20 % of the BDT was classified as "degraded". Varying severities and rates of degradation were found among the river basins, of which the Belyando and Suttor were highest. Interannual, negative trends in reductions of NPP occurred in 7 % of the entire region, indicating ongoing degradation. There was evidence of areas that were in a permanently degraded condition. The findings provide strong evidence and quantitative data for reductions in NPP related to anthropogenic land degradation in the BDT.

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Vegetation change, erosion risk and land management on the Nullarbor Plain, Australia

Cited by 27 publications

References 6 publications

Relationships between rocky desertification and spatial pattern of land use in typical karst area, Southwest China

Relationships between rocky desertification and spatial pattern of land use in typical karst area, Southwest China

Using principal component analysis and annual seasonal trend analysis to assess karst rocky desertification in southwestern China

Degradation of net primary production in a semiarid rangeland

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