Knowledge Resource Center for Ecological Environment in Arid Area
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
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ISSN | 1505-2249 |
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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