Latest Research on Desertification: March – 2020

Biological Feedbacks in Global Desertification

Studies of ecosystem processes on the Jornada Experimental Range in southern New Mexico suggest that longterm grazing of semiarid grasslands leads to an increase in the spatial and temporal heterogeneity of water, nitrogen, and other soil resources. Heterogeneity of soil resources promotes invasion by desert shrubs, which leads to a further localization of soil resources under shrub canopies. [1]

Dynamic Causal Patterns of Desertification

Using a meta-analytical research design, we analyzed subnational case studies (n = 132) on the causes of dryland degradation, also referred to as desertification, to determine whether the proximate causes and underlying driving forces fall into any pattern and to identify mediating factors, feedback mechanisms, cross-scalar dynamics, and typical pathways of dryland ecosystem change. Our results show that desertification is driven by a limited suite of recurrent core variables, of which the most prominent at the underlying level are climatic factors, economic factors, institutions, national policies, population growth, and remote influences. [2]

Climate change, drought and desertification

The definition of desertification accepted in the ad hoc conference held by UNEP in Nairobi in 1977 and confirmed at the Earth Summit on Environment and Development held in Rio de Janeiro in 1992 is: ‘arid, semi-arid and dry-subhumid land degradation’. There is no global long-term trend in any rainfall change over the period of instrumental record (c. 150 years), but there has been an increase of 0·5°C in global temperature over the past 100 years. [3]

The Role of Ecological Factors in Causing Land Surface Desertification, the Case of Sudan

Desertification is a serious socio-economic and environmental disaster that affecting many parts of the world. From eco-geographical view desertification could be defined as decrease in land surface phenology (LSP) caused by biotic and a biotic factors.[4]

Burlap and Breakdown of Waste Plant in Desertification Processes Semiarid of the State of Alagoas

Land degradation in the semi-arid region results from natural processes, which can be induced by man through the inadequate use of resources. The litter exerts numerous functions in the balance and dynamics of the ecosystems, comprising the most superficial layer of the soil in forest environments. [5]

Reference

[1] Schlesinger, W.H., Reynolds, J.F., Cunningham, G.L., Huenneke, L.F., Jarrell, W.M., Virginia, R.A. and Whitford, W.G., 1990. Biological feedbacks in global desertification. Science, 247(4946), pp.1043-1048.

[2] Geist, H.J. and Lambin, E.F., 2004. Dynamic causal patterns of desertification. Bioscience, 54(9), pp.817-829.

[3] Le Houérou, H.N., 1996. Climate change, drought and desertification. Journal of arid Environments, 34(2), pp.133-185.

[4] Alla Eltoum, M. A., Dafalla, M. and Ibrahim, I. (2015) “The Role of Ecological Factors in Causing Land Surface Desertification, the Case of Sudan”, Journal of Agriculture and Ecology Research International, 4(3), pp. 105-116. doi: 10.9734/JAERI/2015/17323.

[5] Silva, M. de O., Ferreira, J. T. P., Duda, G. P., França, R. F., Costa, K. D. da S. and Nascimento, M. R. (2018) “Burlap and Breakdown of Waste Plant in Desertification Processes Semiarid of the State of Alagoas”, Journal of Experimental Agriculture International, 21(2), pp. 1-7. doi: 10.9734/JEAI/2018/38968.

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