Natural ecological carrying capacity is one of the leading fields of international quantitative study of sustainable development.The model calculated regional natural ecological carrying capacity with actual productivity and effective service function of natural ecological system and coupled self-purification ability with water resource supplying function.Therefore the model was named as "actual supply law".The research indicated that "actual supply law" reflects a regional natural ecological carrying capacity objectively and accurately.This paper applied "actual supply law" to the calculation and analysis of the characteristics of dynamic changes of natural ecological carrying capacity of Hainan province from 1952 to 2004 based on the existing data of Hainan Province Statistical Yearbooks and ecological survey data: ①The natural ecological carrying capacity of Hainan Province has been increasing for a long time,per capita natural ecological carrying capacity increased from 7.0804 ha in 1952 to 8.5984 ha in 2004,an increase of 1.5180 ha and an annual average increasing rate of 0.4%.②The carrying capacity of renewable resource occupied considerable proportion of total ecological carrying capacity,accounting for respectively 98.6% and 92.3%;however,the ecological carrying capacity of un-renewable resource occupied only 1.4% and 7.7% in 1952 and 2004.③The carrying capacity of water resource decreased from per capita 6.8165 ha in 1952 to 0.4473 ha in 2004;but the carrying capacity of arable land,sea sector and freshwater body showed a rising tendency,which increased from 0.1277 ha,0.0057 ha and 0.0001 ha in 1952 to 2.6066 ha,3.1192 ha and 1.1468 ha in 2004,and other types of land ecological carrying capacity kept basically unchanged.④In the composition of the ecological carrying capacity,the proportion of water resources changed significantly from 96.3% in 1952 to 5.2% in 2004 dramatically;but the arable land,sea sector and freshwater body had a reversed remarkable change,respectively from 0.1277 ha,0.0057 ha and 0.0001 ha in 1952 increased to 2.6066 ha,3.1192 ha and 1.1468 ha in 2004,and other types of land showed ascending change but the proportion is relatively small.The arable land,sea sector and water resources are the main factors of the ecological carrying capacity of Hainan,the summation of these three factors occupies 71.8%-98.2%.The paper analyzed the causes of dynamic changes of ecological carrying capacity in Hainan Province.Firstly,the advancement of science and technology and improvement of management level are the fundamental reasons for the continuous increase of ecological carrying capacity in Hainan Province.Secondly,dynamic changes of ecological carrying capacity of all types of land are induced by synthetically factors of nature and society reflected the change of their actual ecological service function.Thirdly,the module amelioration is a key factor reflecting mainly the regional natural ecological carrying capacity.Finally,a pronounced drop of ecological carrying capacity of water resources in Hainan Province has both natural and man-made causes.
FU Guo-ji, XU Heng-li, CHEN Wen-ting
. Natural Ecological Carrying Capacity in Hainan Province[J]. JOURNAL OF NATURAL RESOURCES, 2008
, 23(3)
: 412
-421
.
DOI: 10.11849/zrzyxb.2008.03.007
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