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- W324061925 abstract "【Objective】 This paper is to understand the growth of Ambrosia trifida community and to find out impact of Ambrosia trifida invasion on biodiversity.【Method】 This study uses sampling method to investigate Ambrosia trifida growth habitat types and distribution of weeds around Dongling park(Dongling park has 5 points,farmlang 3 points,around high way 4 points,orchard 4 points,roadside 4 points)in Shenyang from May 28th,2008 to June 28th,2008.【Result】 The results show that habitat distribution of the survey sample have a total of 71 kinds of weeds in 28 subjects,of which Asteraceae,Chenopodiaceae,Polygonaceae are the most.Through 34 kinds of weeds with occuring frequency10% on first two principal components loads,we can see the principal components affecting the bitter weeds is the human's interruption level and the soil moisture condition,thus it can be seen that the bitter weed is suitable for interruption and it is suitable to live in the habitat where air relative humidity is higher.Three clusters are divided and as the human's interruption level is higher,the bitter weeds'important value elevates too.Simultaneously the quadrat species'abundance decreases when the bitter weed's imporrtant value increases.This explains that in different habitats,the bitter weeds siring massively can give biodiversity destructive effect.【Conclusion】Therefore Ambrosia trifida can threaten the biological diversity.So if we want to guard against the bitter weeds,the first defense line is to prevent its seed from invading into the non-bitter weed area,meanwhile strengthening the ecologically security propaganda and the ecology education.Only in this way can we establish an ecological secure human living environment." @default.
- W324061925 created "2016-06-24" @default.
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- W324061925 date "2010-01-01" @default.
- W324061925 modified "2023-09-22" @default.
- W324061925 title "Impacts of Ambrosia trifida invasion plant biodiversity." @default.
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