Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2307/2404952 |
Estimating the effects of land degradation and rainfall variation on productivity in rangelands: An approach using remote sensing and models of grazing and herbage dynamics | |
Pickup, G | |
来源期刊 | JOURNAL OF APPLIED ECOLOGY
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ISSN | 0021-8901 |
出版年 | 1996 |
卷号 | 33期号:4页码:819-832 |
英文摘要 | 1. Land degradation in non-equilibrium rangelands may be defined in terms of loss of resilience and is linked with lower economic productivity through reduction in forage consumption by stock. 2. Loss of resilience may be represented by lower water use efficiency and increased tree and shrub cover, in a simple herbage production and consumption model. The model may be calibrated from remotely sensed data. 3. Model calibration for rangeland areas in central Australia yields parameter values for degraded and undegraded situations, allowing estimation of productivity. 4. Modelling of a 50-year rainfall sequence shows that herbage production and consumption by cattle change through time because of rainfall variability. They also change with paddock layout and access to water. 5. The effect of degradation on herbage consumption is relatively small compared with the effects of rainfall variability, but it increases the chance of running out of forage during drought. |
英文关键词 | grazing herbage production modelling non-equilibrium rangelands semi-arid zone |
类型 | Article |
语种 | 英语 |
国家 | AUSTRALIA |
收录类别 | SCI-E |
WOS记录号 | WOS:A1996VQ85000016 |
WOS关键词 | CENTRAL AUSTRALIA ; SENSED DATA ; VEGETATION ; CATTLE ; UNDERSTOREY ; MANAGEMENT ; STABILITY ; PATTERNS ; IMPACT ; COVER |
WOS类目 | Biodiversity Conservation ; Ecology |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
来源机构 | Commonwealth Scientific and Industrial Research Organisation |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/132929 |
作者单位 | (1)CSIRO,DIV WILDLIFE & ECOL,ALICE SPRINGS,NT 0871,AUSTRALIA |
推荐引用方式 GB/T 7714 | Pickup, G. Estimating the effects of land degradation and rainfall variation on productivity in rangelands: An approach using remote sensing and models of grazing and herbage dynamics[J]. Commonwealth Scientific and Industrial Research Organisation,1996,33(4):819-832. |
APA | Pickup, G.(1996).Estimating the effects of land degradation and rainfall variation on productivity in rangelands: An approach using remote sensing and models of grazing and herbage dynamics.JOURNAL OF APPLIED ECOLOGY,33(4),819-832. |
MLA | Pickup, G."Estimating the effects of land degradation and rainfall variation on productivity in rangelands: An approach using remote sensing and models of grazing and herbage dynamics".JOURNAL OF APPLIED ECOLOGY 33.4(1996):819-832. |
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