Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.actao.2016.08.012 |
Effect of grazing on vegetation and soil of the heuweltjieveld in the Succulent Karoo, South Africa | |
Schmiedel, Ute1; Roewer, Inga Ute2,5; Luther-Mosebach, Jona2; Dengler, Juergen3,4; Oldeland, Jens1; Groengroeft, Alexander2 | |
通讯作者 | Schmiedel, Ute |
来源期刊 | ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY
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ISSN | 1146-609X |
EISSN | 1873-6238 |
出版年 | 2016 |
卷号 | 77页码:27-36 |
英文摘要 | We asked how historical and recent grazing intensity affect the patchy landscape of the heuweltjieveld in the semi-arid biodiversity hotspot Succulent Karoo. The study was carried out on a communal farmland 80 km south-west of Springbok, in Namaqualand. Heuweltjies are roughly circular earth mounds that are regularly distributed in this landscape. We sampled plant species and life-form composition, diversity measures, habitat and soil variables in 100 m(2) plots, placed in three visually distinguishable heuweltjie zones (centre, fringe, and matrix) and distributed across grazing camps with different recent and historic grazing intensities. Differences between heuweltjie zones were assessed with ANOVAs and multiple linear regressions. The effect of past and recent grazing intensity on soil and plant variables was analysed by Generalized Linear Models for each heuweltjie zone separately. The three zones constituted clearly distinguishable units in terms of vegetation and soil characteristics. Soil pH and cover of annual plants increased from matrix to centres, while total vegetation cover, species richness and perennial plant cover decreased in the same direction. Historic (pre-2000) grazing patterns had the strongest effects on fringes, showing the strongest soil and vegetation-related signs of overutilization with increased stocking density. Centres showed signs of overutilization irrespective of the stocking density. The much shorter exposure to recent grazing pattern (post-2000), which was nearly inverse to the historic grazing pattern, showed increase of vegetation cover (centres) and species richness (matrix) with recent grazing intensity. We interpret these effects as still visible responses of the lower grazing intensity in these camps during the historic period. No recovery under recent grazing was observed at any of the zones. We conclude that irrespective of their conducive growing conditions, once transformed to a disturbed state, heuweltjie centres recover slowly, whereas the less impacted soil and vegetation of fringes are more responsive than centres and matrix. (C) 2016 Elsevier Masson SAS. All rights reserved. |
英文关键词 | Dryland Land-use impact Rangeland Soil indicator Termitarium Indicator patch |
类型 | Article |
语种 | 英语 |
国家 | Germany |
收录类别 | SCI-E |
WOS记录号 | WOS:000389731600004 |
WOS关键词 | MIMA-LIKE MOUNDS ; CAPE PROVINCE ; EARTH MOUNDS ; WESTERN CAPE ; NAMAQUALAND ; RANGELANDS ; GRADIENTS ; RESPONSES ; PATTERNS ; SYSTEMS |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/190949 |
作者单位 | 1.Univ Hamburg, Bioctr Klein Flottbek, Ohnhorststr 18, D-22609 Hamburg, Germany; 2.Univ Hamburg, Inst Soil Sci, Allende Pl 2, D-20146 Hamburg, Germany; 3.Univ Bayreuth, Bayreuth Ctr Ecol & Environm Res BayCEER, Plant Ecol, Univ Str 30, D-95447 Bayreuth, Germany; 4.German Ctr Integrat Biodivers Res iDiv, Deutsch Pl 5e, D-04103 Leipzig, Germany; 5.Neuengammer Hausdeich 631, D-21037 Hamburg, Germany |
推荐引用方式 GB/T 7714 | Schmiedel, Ute,Roewer, Inga Ute,Luther-Mosebach, Jona,et al. Effect of grazing on vegetation and soil of the heuweltjieveld in the Succulent Karoo, South Africa[J],2016,77:27-36. |
APA | Schmiedel, Ute,Roewer, Inga Ute,Luther-Mosebach, Jona,Dengler, Juergen,Oldeland, Jens,&Groengroeft, Alexander.(2016).Effect of grazing on vegetation and soil of the heuweltjieveld in the Succulent Karoo, South Africa.ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY,77,27-36. |
MLA | Schmiedel, Ute,et al."Effect of grazing on vegetation and soil of the heuweltjieveld in the Succulent Karoo, South Africa".ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 77(2016):27-36. |
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