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OPTIMAL METHOD TO DETERMINE DENSITY OF THE SCARCE VEGETATION IN DRY DESERT: VARIABLE AREA TRANSECT (VAT) APPLIED TO SAXAUL (HALOXYLON AMMODENDERON) COMMUNITY
Kiani, Bahman1; Tabari, Masoud1; Fallah, Asghar2; Hosseini, Seyed Mohsen1; Parizi, Mohammad-Hossein Iran Nejad3
通讯作者Tabari, Masoud
来源期刊POLISH JOURNAL OF ECOLOGY
ISSN1505-2249
出版年2011
卷号59期号:4页码:823-828
英文摘要

The assessment of the density and cover of very scarce vegetation in dry habitats may create methodological problems. The variable area transect method (VAT) is a potential labour-saving sampling method and an alternative to plot (quadrate) method. It allows for density estimation without the time-consuming studies associated with other plot-less density estimators. We used the method in a natural shrub-land of Saxaul (Haloxylon ammodenderon C.A.M) to define optimum parameters include transect width and individual’s number to which, distance is measured. Three transect widths were chosen, 10-m, 15-m and 20-m and distances to the 3(rd), 4(th) and 5(th) individual. Transect width affected the estimation, a 20-m width transect had the least relative bias (-0.5%), and a 10-m width sampling had the greatest bias (-20%). However, all methods underestimated the plant density. The most accurate estimation was with the 3(rd) plant distance and 20-m transect. As the VAT method is more efficient per unit effort in the field than the quadrate methods, it can be recommended for rapid assessment of desert communities density (like saxaul) especially when plants are dispersed at random.


英文关键词density estimation distance sampling variable area transect plot-less methods
类型Article
语种英语
国家Iran
收录类别SCI-E
WOS记录号WOS:000298457300016
WOS关键词MONTE-CARLO-SIMULATION
WOS类目Ecology
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170120
作者单位1.Tarbiat Modares Univ, Fac Nat Resources, Dept Forest Sci, Noor, Mazandaran, Iran;
2.Mazandaran Univ Agr Sci & Nat Resources, Fac Nat Resources, Dept Forest Sci, Sari, Iran;
3.Yazd Univ, Fac Nat Resources, Dept Forestry, Yazd, Iran
推荐引用方式
GB/T 7714
Kiani, Bahman,Tabari, Masoud,Fallah, Asghar,et al. OPTIMAL METHOD TO DETERMINE DENSITY OF THE SCARCE VEGETATION IN DRY DESERT: VARIABLE AREA TRANSECT (VAT) APPLIED TO SAXAUL (HALOXYLON AMMODENDERON) COMMUNITY[J],2011,59(4):823-828.
APA Kiani, Bahman,Tabari, Masoud,Fallah, Asghar,Hosseini, Seyed Mohsen,&Parizi, Mohammad-Hossein Iran Nejad.(2011).OPTIMAL METHOD TO DETERMINE DENSITY OF THE SCARCE VEGETATION IN DRY DESERT: VARIABLE AREA TRANSECT (VAT) APPLIED TO SAXAUL (HALOXYLON AMMODENDERON) COMMUNITY.POLISH JOURNAL OF ECOLOGY,59(4),823-828.
MLA Kiani, Bahman,et al."OPTIMAL METHOD TO DETERMINE DENSITY OF THE SCARCE VEGETATION IN DRY DESERT: VARIABLE AREA TRANSECT (VAT) APPLIED TO SAXAUL (HALOXYLON AMMODENDERON) COMMUNITY".POLISH JOURNAL OF ECOLOGY 59.4(2011):823-828.
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