The research result of insect community development indicate : the differences to quantity and richness of pest , natural enemy and whole insect community among experiment sections are distinct . the dynamic uptrend of diversity and evenness indexes between harmless section and general section are analogical , but that of blank section and two manage sections is different
22.
Qualitative and quantitative investigation ( visual encounter surveys ) of terrestrial mollusca were carried out in each sampling site of mangshan nature reserve and babaoshan of guangdong . all terrestrial mollusca in each sampling site were collected and identified . a list of the name of the species of terrestrial mollusca , margalef species richness index ( d _ ( ma ) ) , shannon - wiener index ( h " ) and pielou evenness index ( jsw ) were used to analyze their biodiversity
23.
Taking the land consolidation project of yizheng city in jiangsu province as an example , patch extension index , fractal dimension , diversity index , evenness index , dominance index , fragmentation index , corridor density , etc wee selected to analyze the characteristics of the landscape pattern before and after the land consolidation with the landscape ecology theory
24.
Community ' s a diversity is measured by simpson diversity index , shannon - wiener diversity index and pielou evenness index . the results show that habitats range in a diminishing sequence of diversity indices from broadleaf forest , broadleaf bush , grassland bush to bamboo forest ; that altitude belts range from 600 - to - 1200 - m belt , under - 600 - m belt to 1200 - to - 1800 - m belt , and no longicorn beetles was found above 1800 m ; months from july , may , june to august , a diversity analysis shows that complicated habitats can hold higher biodiversity
25.
Combining with fragstats software , landscape diversity index ( h ) , landscape dominance index ( d ) , landscape evenness index ( e ) , fractal dimension , landscape contagion index and landscape fragmentation index are calculated . they show : ? grassplot landscape is a primary landscape type in gansu . the numbers of big patch is much more
26.
( 2 ) region is mainly made up of large patches which are distributed collectively . region landscape is mainly made up of the hill grassplot landscape of mountainous region and desertification landscape . ( 3 ) with the enhancement of human beings effect , landscape diversity indexes are declined , landscape evenness indexes are reduced , and landscape fragmentations are intensified
27.
The result showed that landscape diversity index and evenness index increase along the gradient , whilst dominant index decrease along the gradient zones . in general , landscape elements present concentrative d istributing patterns for great size , with landscape patch density and edged density smaller and landscape heterogeneity lower than others within closing to gradient of the city
28.
With the help of the statistical function of gis and remote sensing interpretation , the areas of very kind of soil of original state , 1985 and 2000 are got . then the evenness indices and diversity indices of soil three times are calculated and the results show that the evenness indices and diversity indices are
29.
The result suggests that the species richness index ranks as following among 6 stations : yangma islet > drogan - whisker islet > moon bay > jingouzhai > jingouzhai gravel , and yangma islet possessed the highest species diversity index , while jingouzhai the lowest , the order of species diversity index among 6 stations is yangma islet > moon bay > drogan - whisker islet > jingouzhai > zhifu islet > jingouzhai gravel , the order of species evenness index is : moon bay > drogan - whisker islet > yangma islet > jingouzhai > zhifu islet > jingouzhai gravel
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