evenness index वाक्य
उदाहरण वाक्य
मोबाइल
- 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
- 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
- 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
- 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
- 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
- ( 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
- 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
- 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
- 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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