Considering effect of spatial scale on landscape diversity simulation: the case of Fukang city in Xinjiang Uygur Autonomous Region
Received date: 2005-06-06
Revised date: 2005-11-23
Online published: 2006-04-15
The term 'ecological diversity' is a combination of richness and evenness of an investigation object,including HLZ ecosystem diversity,ecotope diversity and species diversity.Many ecological diversity indexes concern only one aspect of diversity,and neglect the effect of spatial scale on diversity simulation.Actually,it is a precondition to consider muti-scale diversity simulation and assessment that the effect of spatial scale on different diversity indexes has been compared and analyzed.This paper takes Fukang city in Xinjiang Uygur Autonomous Region as a study area to analyze the effect of spatial scale on ecological simulation by Shannon diversity index,Simpson diversity index,Margalef diversity index,Whittaker diversity index,Turner diversity index,Mladenoff diversity index and Scaling ecological diversity index.The result shows:⑴with spatial resolution getting coarser,change of the ecotope evenness is greater than the ecotope richness;⑵Shannon diversity index and Turner diversity index emphasize more on the ecotope evenness,and the ecotope diversities simulated by these indexes show a general trend on better spatial resolution;Whittaker index and Margalef index simply concern about the proportion between the total number of the ecotope individuals and the ecotope types,and the number of the ecotope types more influence on Margalef index,thus the ecotope diversity simulated by Whittaker index has a better trend;and ⑷Mladenoff index and Scaling ecological diversity index take both of the two aspects of the ecological diversity into account,but the richness has more influence on Mladenoff index thus the diversity simulated by the index has no distinct trend;however,Scaling index also concerns the effect of spatial scale,consequently the ecotope diversity simulated by the index has a better trend than the other diversity indexes.
Key words： ecological diversity; ecotope diversity; diversity index; spatial scales
MA Sheng-nan, YUE Tian-xiang, WU Shi-xin . Considering effect of spatial scale on landscape diversity simulation: the case of Fukang city in Xinjiang Uygur Autonomous Region[J]. GEOGRAPHICAL RESEARCH, 2006 , 25(2) : 359 -367 . DOI: 10.11821/yj2006020021
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