Desertification Research in Argentina

Torres, L.; Abraham, Elena María; Rubio, Cecilia; Barbero‐Sierra, Celia; Ruiz‐Pérez, Manuel

doi:10.1002/ldr.2392

Cited by 79 publications

(54 citation statements)

References 22 publications

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“…As can be likened to other arid to semiarid regions of the world (Amuti et al, 2014;Sarah and Zonana, 2015;Torres et al, 2015;Barbero-Sierra et al, 2015;Mureithi et al, 2015), this region (the SHP) is currently facing complex environmental challenges such as drought, declining groundwater quality, wind erosion, and soil salinization that limit agricultural productivity (Mehta et al, 2000;Stout, 2001;Allen et al, 2005;Young et al, 2015). Recent observations have also revealed an increasing number of cases of micronutrient deficiency, which could be attributed to the characteristically high pH soils prevalent in this region and intensive crop production activities.…”

Section: T K Udeigwe Et Al: Examining the Fixation Kinetics Of Chementioning

confidence: 98%

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

et al. 2016

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Abstract. This study examined and compared the fixation and fixation kinetics of copper (Cu) in chelated (ethylene diamine tetraacetic acid, EDTA) and non-chelated mixed systems of micronutrients in the semiarid soils of the Southern High Plains, USA, using findings from Cu extraction studies and kinetic models. Approximately, 22 % more Cu was fixed in the non-chelated system compared to the chelated within the first 14 days with only 7 % difference between the two systems by day 90. Findings suggest a decrease in the effectiveness of chelated micronutrients over time, highlighting the significance of timing even when chelated micronutrients are used. The strengths of the relationship of change in available Cu with respect to other micronutrients (iron (Fe), manganese (Mn), and zinc (Zn)) were higher in the nonchelated system (R 2 : 0.68-0.94), compared to the chelated (R 2 : 0.42-0.81), with slopes of 0.40 (Cu-Fe), 0.31 (Cu-Mn), and 1.04 (Cu-Zn) in the non-chelated system and 0.26 (CuFe), 0.22 (Cu-Mn), and 0.90 (Cu-Zn) in the chelated system. Reduction in the amount of available Cu was best described by the power function model (R 2 = 0.91, SE = 0.081) in the non-chelated system and second-order model (R 2 = 0.95, SE = 0.010) in the chelated system. The applications generated from this study could be used as tools for improved micronutrient management and also provide baseline data for future work in other semiarid/arid alkaline soils of the world. Findings are also more applicable to field settings, an improvement over related previous studies.

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Section: T K Udeigwe Et Al: Examining the Fixation Kinetics Of Chementioning

confidence: 98%

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

et al. 2016

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“…Land degradation which is a serious threat to dryland ecosystems is a complex environmental problem that combines a natural and social cause-effect cycle (Warren 1993;Darkoh 2003;Reynolds et al 2007;Whitfield et al 2011;Torres et al 2015;Wiesmeier 2015). Land degradation is driven by human activities (unsustainable land use), adverse climatic conditions such as extended or recurrent droughts, and population increase (UNEP 1997;Msangi 2004;Mganga et al 2015;Oudenhoven et al 2015).…”

Section: Dryland Degradation: Extent Drivers and Impactsmentioning

confidence: 99%

Rehabilitation of degraded dryland ecosystems – review

Yirdaw¹,

Tigabu²,

Monge³

2017

Silva Fenn.

114

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Highlights• The prospect of restoring degraded drylands is technically promising.• The forest landscape restoration concept can be used as the overarching rehabilitation framework.• Development of process-based models that forecast rehabilitation outcomes is needed.• Rehabilitation methodologies developed for moist areas are not necessarily suitable for drylands.• More data is needed on cost-benefit analysis of rehabilitation interventions. AbstractLand degradation is widespread and a serious threat affecting the livelihoods of 1.5 billion people worldwide of which one sixth or 250 million people reside in drylands. Globally, it is estimated that 10-20% of drylands are already degraded and about 12 million ha are degraded each year. Driven by unsustainable land use practices, adverse climatic conditions and population increase, land degradation has led to decline in provision of ecosystem services, food insecurity, social and political instability and reduction in the ecosystem's resilience to natural climate variability. Several global initiatives have been launched to combat land degradation, including rehabilitation of degraded drylands. This review aimed at collating the current state-of-knowledge about rehabilitation of degraded drylands. It was found that the prospect of restoring degraded drylands is technically promising using a suite of passive (e.g. area exclosure, assisted natural regeneration, rotational grazing) and active (e.g. mixed-species planting, framework species, maximum diversity, and use of nurse tree) rehabilitation measures. Advances in soil reclamation using biological, chemical and physical measures have been made. Despite technical advances, the scale of rehabilitation intervention is small and lacks holistic approach. Development of processbased models that forecast outcomes of the various rehabilitation activities will be useful tools for researchers and practitioners. The concept of forest landscape restoration approach, which operates at landscape-level, could also be adopted as the overarching framework for rehabilitation of degraded dryland ecosystems. The review identified a data gap in cost-benefit analysis of rehabilitation interventions. However, the cost of rehabilitation and sustainable management of drylands is opined to be lower than the losses that accrue from inaction, depending on the degree of degradation. Thus, local communities' participation, incorporation of traditional ecological knowledge, clear division of tasks and benefits, strengthening local institutions are crucial not only for cost-sharing, but also for the long-term success of rehabilitation activities.

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“…Wang et al, 2013;Bai et al, 2013;Xu and Zhang, 2014) date back to recent decades. However, socio-economic issues still have scant links with the core of biophysical science Torres et al, 2015). A step towards an integrated framework to combat desertification was recently proposed in the "Dryland Development Paradigm" (Reynolds et al, 2007) to help understand linked social-ecological systems in drylands.…”

Section: Desertification As a Complex Social-ecological Problemmentioning

confidence: 99%

Zero net livelihood degradation – the quest for a multidimensional protocol to combat desertification

Easdale¹

2016

SOIL

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Abstract. The concept of Zero Net Land Degradation was recently proposed as the basis for a future protocol for the United Nations Convention to Combat Desertification to reduce global dryland degradation. It aims at reducing the rate of land degradation and increasing the rate of restoration of already degraded land. Whereas there is recognition of the socio-economic contexts that underlie degradation processes, there is a narrow focus on land and soil as the end core that needs to be protected. In particular, there is an essential human dimension to the sustainability of drylands that should be adequately tackled. In order to provide a wider perspective of the zero net degradation in drylands, I suggest considering the different livelihoods of rural households as a framework that encompasses the multidimensional perspective of desertification as a complex social-ecological problem. The scientific community must develop and apply the zero net livelihood degradation as an enhanced protocol to combat desertification that should foster sustainable livelihood outcomes rather than only sustainable land practices or soil management.

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Desertification Research in Argentina

Cited by 79 publications

References 22 publications

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

Examining the fixation kinetics of chelated and non-chelated copper and the applications to micronutrient management in semiarid alkaline soils

Rehabilitation of degraded dryland ecosystems – review

Zero net livelihood degradation – the quest for a multidimensional protocol to combat desertification

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