Correlation between monthly average temperature and grasshopper outbreak in the region around Qinghai Lake based on GIS

Abstract

Abstract: It is necessary to study the relationship between grasshopper and ecological factors for forecasting grasshopper outbreak effectively. Temperature is one of main factors influencing grasshopper outbreak in the region around Qinghai Lake. With the support of Arc/Info and ArcView, monthly average temperatures were simulated under the scale of 150 m by data from sixteen meteorological stations adjacent to Qinghai Lake for adapting the comprehensive method and establishing spatial temperature database. Then, the relationship between grasshopper outbreak and monthly average temperature were analyzed by combining the spatial data of grasshopper density and the spatial data of monthly average temperature. The result showed that effects of monthly average temperature on Grasshopper outbreak were closely related to the life cycle of the dominant grasshopper species in the region, namely, monthly average temperatures of May, June, and July influenced grasshopper outbreak in the current year, and monthly average temperatures of August and September influenced grasshopper outbreak in the next year. Thereby, it could provide a base of establishing forecasting models of grasshopper outbreak.

Key words: Geographical Information System (GIS), Temperature, Simulation, Grasshopper, Qinghai Lake region

CLC Number:

S435.112

ZHANG Hongliang, NI Shaoxiang, DENG Ziwang, CHEN Yun . Correlation between monthly average temperature and grasshopper outbreak in the region around Qinghai Lake based on GIS[J]. Chinese Journal of Applied Ecology, 2002, (7): 837-840.

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