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Publication Type J
Authors Hanke, W; Wesuls, D; Munchberger, W; Schmiedel, U
Author Full Name Hanke, Wiebke; Wesuls, Dirk; Muenchberger, Wiebke; Schmiedel, Ute
Title Tradeoffs in the Rehabilitation of a Succulent Karoo Rangeland
Source LAND DEGRADATION & DEVELOPMENT
Language English
Document Type Article
Author Keywords Atriplex semibaccata; communal lands; livestock manure; plant-soil feedbacks; rangeland rehabilitation; Succulent Karoo
Keywords Plus DAIRY MANURE APPLICATION; SOUTH-AFRICA; MESEMBRYANTHEMUM-CRYSTALLINUM; RESTORATION ECOLOGY; ATRIPLEX-SPP; LAND-USE; SOIL; VEGETATION; NAMAQUALAND; RAINFALL
Abstract Rangeland rehabilitation has multiple, sometimes conflicting goals, such as the reestablishment of the predisturbance vegetation, soil protection, and forage production. The rehabilitation techniques should be also cost-effective and practicable. Given the difficulties and high costs of restoring Succulent Karoo rangelands and the continuously high grazing pressure in the communal lands, tradeoffs should be accepted in the achievement of these goals. We tested the capability of paddock manure redistribution to reverse degradation trends in a heavily grazed Succulent Karoo rangeland in South Africa. Over 3years, the effects of the manure application were compared with areas planted with mature shrubs as a benchmark for a predisturbance vegetation structure and with four popular rehabilitation techniques: (1) livestock exclusion; (2) brushpacking (coverage of dead shrubs); (3) mineral fertilizing; and (4) microcatchment construction. Manure was, besides planting, the only treatment that resulted in a significant increase in drought-resistant vegetation cover, but it compromised the dominance of native vegetation. In the manure plots, a pasture-like vegetation of non-native forage plants (which germinated mainly from seeds in the dung), developed (foremost Atriplex semibaccata). Manure application counteracted erosion as effectively as the planted shrubs and brushpacks. Expected negative side effects such as a decrease in plant species richness or salinization of topsoil were not detected. We also checked the potential of topsoil salinization by the halophytic A. semibaccata and found it to be low. For sites where a decrease in grazing pressure is unrealistic under current land tenure, redistribution of manure should be further explored to mitigate acute symptoms of degradation. Copyright (c) 2013 John Wiley & Sons, Ltd.
Author Address [Hanke, Wiebke; Wesuls, Dirk; Muenchberger, Wiebke; Schmiedel, Ute] Univ Hamburg, Bioctr Klein Flottbek, Biodivers Evolut & Ecol Plants, D-22609 Hamburg, Germany
Reprint Address Hanke, W (reprint author), Univ Hamburg, Bioctr Klein Flottbek, Biodivers Evolut & Ecol Plants, Ohnhorststr 18, D-22609 Hamburg, Germany.
E-mail Address w.hanke@biota-africa.org
Funding Agency and Grant Number German Federal Ministry of Education and Research [01 LC 0624A2]
Funding Text This study was conducted within the framework of the BIOTA Southern Africa project sponsored by the German Federal Ministry of Education and Research under the promotion number 01 LC 0624A2. Northern Cape Nature Conservation, South Africa, kindly issued a research permit. We thank the management of the Richtersveld Community Conservancy and members of the Eksteenfontein community for support during the experiment. We thank Randall Joseph, Janne Weber, Sarah Meyer, Anne Schulz, and Matthias Ros for field assistance and Jurgen Dengler for his comments on the manuscript. We gratefully acknowledge the valuable comments and suggestions of one anonymous reviewer and from Matthew Bowker and Artemi Cerda. The development of this paper has benefited substantially from their comments.
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Cited Reference Count 54
Publisher WILEY-BLACKWELL
Publisher City HOBOKEN
Publisher Address 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
ISSN 1085-3278
29-Character Source Abbreviation LAND DEGRAD DEV
ISO Source Abbreviation Land Degrad. Dev.
Publication Date NOV
Year Published 2015
Volume 26
Issue 8
Beginning Page 833
Ending Page 842
Digital Object Identifier (DOI) 10.1002/ldr.2224
Page Count 10
Web of Science Category Environmental Sciences; Soil Science
Subject Category Environmental Sciences & Ecology; Agriculture
Document Delivery Number CV5WN
Unique Article Identifier WOS:000364342200008
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