evenness index वाक्य
उदाहरण वाक्य
मोबाइल
- In the study , the dominance index and evenness index are used for analysis
- The dominance index is often contrary to the diversity index , index of diversification and evenness index in change rules
- The intensive human disturbance within the region had increased the landscape diversity index and evenness index , a decrease of
- The t - test result shows that the species diversity index , evenness index and consume biomass are no significant differences between 12 years fore - and aft
- We selected several landscape metrics , such as landscape diversity metrics , edge index , fractal dimension , evenness index , contagion index and so on
- Analysis from the whole area the shape of landscape was becoming regular and simple . ( 4 ) the diversity index and evenness index decreased and the dominance index increased
- Richness index , evenness index and diversity index were selected as indicators of pedodiversity . here we used shannon index ( h " ) as diversity index and pielou index ( e ) as evenness index
- On the other hand , the high landscape diversity and evenness indexes owning to rich and well - proportional components are distinct features in the basin
- The decline of bird species diversity and evenness index in yueqing bay indicated that the habitats of water birds were being degraded , which might be related to human disturbance such as reclamation
- The thesis used the diversity index , dominance index and evenness index to analyse the landscape patterns in the county , showing the embodying of the spatial characters caused by the man - made disturbance and landscape succession
- The diversity index showed that neca > pca > cka , and so did the evenness index . the dominant concentration index showed that cka > pca > neck . so the stability of the arthropod community in neca is best and that in cka is worst in the three areas
- Biodiversity indices are much influenced by the types of the vegetation in jinfo mt . the species richness index , diversity index and evenness index of the plots in karst area raised when the plots were jamming early and slightly ; species richness index and diversity index of the plots in nonkarst area raised when the plots were jamming early and slightly , but evenness index fell . the diversity index and species richness index of original vegetation in karst area are lower than in nonkarst area
- Diversity index on different terrain varied between 0 . 28 to 1 . 75 , the terrain followed the sequence of level land - plain > sloping land - medium - gradient mountain > sloping land - medium - gradient hill > level land - valley floor > sloping land - medium - gradient escarpment zone > level land - depression > steep land - high - gradient mountain ; the evenness index on different terrain varied between
- By using of the richness , diversity and evenness indices , combined with twinspan , dca , dcca , multi - factors regression , correlation analysis techniques and so on , species diversity and diversification mechanism were studied . the communities were classified into eight types by twinspan . the first axis of dca indicated basically the diversification of soil water , while the second axis indicated basically the disturbance degree by people . the correlations between n , organic matter , elevation and the first axis are negative association , and the others are positive
- H " was calculated using the shannon - wiener formula : h " = ? pi ? pi e was calculated using the pielou ' s evenness index e : e = h ' hmax = h ' ? s the results showed that diversity index on different parent materials varied between 0 . 49 to 1 . 02 , the different parent materials followed the sequence of igneous rock > sedimentary rock > metamorphic rock > unconsolidated material ; the evenness index on different parent materials varied between 0 . 27 to 0 . 64 , the parent materials followed the sequence of igneous rock > sedimentary rock > metamorphic rock > unconsolidated material
- Based on plant communities and plots investigation in jinfo mt . and experimental site in guilin , the author calculated the indices of every plot with its species richness index , simpson index , shannon - wiener index , pielou evenness index and alatalo evenness index . the author analyzed the character and variation of the biodiversity in different area and different layers about the plots in jinfo mt
- The density with the biodiversity increasing shows " m " model . ( 3 ) the correlation analysis shows : elevation , slope , development stage and biomass are main factors which affect the biodiversity pattern in the research region . the biodiversity of the quercus aliena var . acutesrata community shows the patterns with the elevation and slope affecting : on sunny slope , the species diversity increases with the elevation increasing below the attitude of 1640m and its climax is at this attitude ( the diversity index h = 1 . 68 ) , upward this point , the diversity index descends slowly . the evenness shows ascend trend with the elevation upward , its climax point at 1800m ( the evenness index jsw = 0 . 78 ) , then descending after this point
- We use the landscape acreage index , landscape fragmentation index , landscape apartness index , landscape diversity index , landscape dominance index , landscape evenness index and landscape shape index , to analyze the characteristics of the changes of landscape based on the landscape structure in 1996 and 2004
- The results showed that , in the course of wasteland restoration , the cultivated vegetation grew well ; the plant species was increased from 13 to 60 , and the richness index , evenness index and diversity index of species was increased significantly ; the proportion of annual and biennial herbage in vegetation composition was decreased from 61 . 5 % to 35 % , and the vegetation coverage was increased from 18 % to 80 %
- These diversity indexes indicate a trend - the more abundant and even the components and more complicated the habitats of the community , the higher value of these diversity indexes whether margalef species richness index ( d _ ( ma ) ) , shannon - wiener index ( h " ) , or pielou evenness index ( jsw ) were used to analyze the biodiversity of terrestrial mollusca . the change of shannon - wiener ( h " ) is accordant with species and margalef species richness index ( d _ ( ma ) )
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