Climate Change and Dryland Agricultural Ecosystem Management

The study of the evolution between ecological security pattern and
agricultural productive force in the Manas River basin for the past
Abstract:
thirty years
Yuejian Wang 1,2,Hailiang Xu 3, Cheng Wang 2, Hongbo Ling 3, Hongling Liu 4, Shaoming Wang4,∗
1.Department of Geography, Shihezi University, Xinjiang Shihezi 832003
2.School of geographical sciences ,southwest university ,Chongqing 400715
3.Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011
4.Key Laboratory of Oasis Ecological Agriculture of Xinjiang Bingtuan, Xinjiang Shihezi 832003
It is an important indicator for ecological security to have a healthy ecosystem,its ultimate goal is to
achieve ecosystem health services and build sustainable ecological landscape security pattern.
Ecological health is a form for appraising eco-system status, Costanza and the descendants think that
standards of ecosystem health includes energy, organizational ability, resilience, maintenance of
ecosystem services, management options, the reduction of the external input、the influence of
neighboring system and human health and so on, are total eight aspects, the first three of which are the
most important.
Based on the structure and function of ecological system, the basic principle of using ecological health
has important significance for the study on security of ecological system, especially that at present
about ecological security pattern of arid basin and evolution relationship of agricultural production is
the hot issue for ecology field research. After decades of large-scale water conservancy and irrigation,
the rapid increase in cultivated land, watershed agricultural productivity has been greatly improved for
Manas River basin, but all of which is on the basis of arge-scale water resources development, highly
dependent on water resources development and construction for the oasis makes the valley a series of
ecological and environmental problems.
Therefore, according to the characteristics of a typical mountain - Oasis - Desert system structure
(MODS) for the Manas River Valley, the basin is divided into four ecological zones, to analyze the
ecological security condition for the four ecological zones in the past 30 years; from the perspective of
ecological health, as amended by the Costanza previous model, this passage studies and analyses the
changes in basin as a whole ecological security pattern and the evolution relationship between its
change and agriculture production development.
Study suggests that: (1) In the past 30 years, the changes are in ecological security evaluation index
value and the ecological security status for 4 eco-types: the upstream mountain index value fell 0.13,
from the relatively safe area - warning area; river oasis city zone index value increased 0.09, by the
early warning area - relatively safe areas; River oasis agricultural area index value decreased to 0.19
by the early warning area in the District; downstream desert index value fell 0.14,ecological security
situation continued to decline in the warning range. Expect for the city outside oases, ecological
security condition of mountains upstream, midstream and downstream oasis agricultural areas all
∗
Corresponding author: Wang Shao-ming, Email:westwild@vip.sina.com
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