Land Degradation in the Drylands

Dregne, H. E.

doi:10.1080/153249802317304422

Cited by 277 publications

(151 citation statements)

References 34 publications

Supporting

Mentioning

145

Contrasting

Unclassified

Order By: Relevance

“…Whether resulting from loss of topsoil or physical and chemical deterioration, rangeland degradation is often preceded by a reduction in vegetation cover and/or biological soil crust (Belnap 1995;Dregne 2002). Overgrazing (Kerley and Whitford 2000;Manzano et al 2000), deforestation and use of woody plants for fuel (Abahussain et al 2002;Asner et al 2004), andclimatic variation (Le Houerou 1996) all potentially drive the degradation process.…”

Section: What Ecohydrological Feedbacks Play a Role In Rangeland Degrmentioning

confidence: 99%

Emerging Issues in Rangeland Ecohydrology: Vegetation Change and the Water Cycle

Wilcox

Thurow

2006

REM

View full text Add to dashboard Cite

Rangelands have undergone-and continue to undergo-rapid change in response to changing land use and climate. A research priority in the emerging science of ecohydrology is an improved understanding of the implications of vegetation change for the water cycle. This paper describes some of the interactions between vegetation and water on rangelands and poses 3 questions that represent high-priority, emerging issues: 1) How do changes in woody plants affect water yield? 2) What are the ecohydrological consequences of invasion by exotic plants? 3) What ecohydrological feedbacks play a role in rangeland degradation processes? To effectively address these questions, we must expand our knowledge of hydrological connectivity and how it changes with scale, accurately identify ''hydrologically sensitive'' areas on the landscape, carry out detailed studies to learn where plants are accessing water, and investigate feedback loops between vegetation and the water cycle.

show abstract

Section: What Ecohydrological Feedbacks Play a Role In Rangeland Degrmentioning

confidence: 99%

Emerging Issues in Rangeland Ecohydrology: Vegetation Change and the Water Cycle

Wilcox

Thurow

2006

REM

View full text Add to dashboard Cite

show abstract

“…For example, existing studies typically report the spatial extent of reductions [53], often using an arbitrarily determined threshold that represents substantial change, rather than severity of change. This creates a challenge when comparisons are needed between the spatial extent of degradation and the severity of degradation [54]. There is, however, often a complementary relationship between degradation extent and its severity [55].…”

Section: Degradation and Components Of Fractional Cover In The Bdtmentioning

confidence: 99%

Degradation of Non-Photosynthetic Vegetation in a Semi-Arid Rangeland

Jackson

Prince

2016

Remote Sensing

View full text Add to dashboard Cite

Land degradation in drylands is the process in which undesirable conditions emerge due to human and natural causes. Despite the particularly deleterious effects of degradation, and it's potentially irreversible nature, regional assessments have provided conflicting extents, rates, and severities of degradation, both globally and regionally. Current monitoring of degradation relies upon the detection of green, photosynthetically active parts of vegetation (e.g., leaves). Less is known, however, about the effect of degradation on the non-photosynthetic components of vegetation (e.g., wood, stems, leaf litter) and the relationship between photosynthetic vegetation (PV), non-photosynthetic vegetation (NPV), and bare soil under degraded conditions (BS). The major objective of the study was to evaluate regional patterns of fractional cover (i.e., PV, NPV, BS) under degraded and non-degraded NPP conditions in a managed rangeland in north Queensland, Australia. Homogenous environmental conditions were identified and each of NPP, PV, NPV, and BS were scaled according to their potential, reference values. We found a strong spatial and temporal correlation between scaled NPP with both scaled PV and scaled BS. Drastic differences were also found for PV and BS between degraded and non-degraded conditions. NPV displayed similarity to both PV and BS, however no clear relationship was found for NPV in all areas, irrespective of degradation conditions.

show abstract

“…1). The resulting problem of overgrazing is considered the main factor for desertification (Dregne 2002, Scheffer & Carpenter 2003, Herrmann & Hutchinson 2005 for North-America see e.g. , for Africa e.g.…”

Section: Introductionmentioning

confidence: 99%

Wood production, wood technology, and biotechnological impacts

Kües¹

2007

View full text Add to dashboard Cite

Land Degradation in the Drylands

Cited by 277 publications

References 34 publications

Emerging Issues in Rangeland Ecohydrology: Vegetation Change and the Water Cycle

Emerging Issues in Rangeland Ecohydrology: Vegetation Change and the Water Cycle

Degradation of Non-Photosynthetic Vegetation in a Semi-Arid Rangeland

Wood production, wood technology, and biotechnological impacts

Contact Info

Product

Resources

About