JOURNAL OF NATURAL RESOURCES ›› 2018, Vol. 33 ›› Issue (3): 439-453.doi: 10.11849/zrzyxb.20170041

• Resource Ecology • Previous Articles     Next Articles

Research on the Seasonal Variations and Optimization of Landscape Pattern in Poyang Lake Region, China

NING Li-xin1, ZHOU Yun-kai1, BAI Xiu-ling1, XU Shan-shan1, ZHANG Qi-bin2, LI Pei-jun1   

  1. 1. a. Institute of Natural Resources and Environment, b. College of Environment and Planning, Henan University, Kaifeng 475004, China;
    2. Beijing Forestry University, Beijing 100083, China
  • Received:2017-01-16 Revised:2017-05-24 Online:2018-03-20 Published:2018-03-20
  • Supported by:
    The Natural Science Foundation of China, No. 41101089 and 41371450.

Abstract: Due to the seasonal changes of temperature, precipitation and other environmental factors, the landscape pattern in a region will show seasonal variations during a year, which will impact the ecological process in the region. Landscape pattern optimization should base on a comprehensive understanding of the landscape pattern and ecological process and adjust the quantity of various landscapes and their distribution and configurations in space to produce the greatest landscape function and ecological benefits. Therefore, a reasonable optimization program of landscape pattern cannot ignore the seasonal changes of landscape pattern and ecological process. In this paper, the Poyang Lake region, demarcated by natural attributes, was chosen as an example for landscape pattern optimization. Based on the theory of landscape ecology, the seasonal variation characteristics of landscape pattern in Poyang Lake region were quantitatively analyzed with GIS spatial analysis technology. The results show that the seasonal variations of the overall landscape pattern in Poyang Lake region were obvious. Compared with those in high water period, the patches in low water period were more fragmented and the shapes of the patches were more complex. The landscapes were less aggregated and the landscape heterogeneity was higher in high water period than in low water period. As for types, the change of bottomland was the most obvious in the landscapes. Based on the seasonal variation of landscape pattern, the ecological components, including source, corridor (three types) and nodes, in high and low water periods of Poyang Lake region were identified and constructed with the Minimum Accumulative Resistance model and GIS spatial analysis module, and an ecological function network of “Patch-Corridor-Matrix” was formed. Through the comparison and analysis of ecological components in different hydrographic periods, the major ecological components which play important roles in maintenance of landscape pattern and function were chosen to build a reasonable landscape pattern optimization program. This program aimed to enhance the connectivity of landscape network and operation of ecological flows, strengthen the stability and sustainability of ecological system. This research provides the reference for the ecological planning and management in Poyang Lake region.

Key words: landscape indexes, landscape pattern optimization, Minimum Accumulative Resistance Model, Poyang Lake region, seasonal variations

CLC Number: 

  • X826