Barro Colorado Island Quadrat Descriptions

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Description

Topography-derived variables and UTM coordinates and UTM coordinates of a 50 ha sample plot (consisting of 50 1-ha quadrats) from Barro Colorado Island of Panama. Dataset BCI provides the tree species composition (trees with diameter at breast height equal or larger than 10 cm) of the same plots.

Usage

1

Format

A data frame with 50 observations on the following 6 variables.

UTM.EW

UTM easting

UTM.NS

UTM northing

elevation

mean of the elevation values of the four cell corners

convex

mean elevation of the target cell minus the mean elevation of the eight surrounding cells

slope

mean angular deviation from horizontal of each of the four triangular planes formed by connecting three of its corners

aspectEW

the sine of aspect

aspectNS

the cosine of aspect

References

Pyke C.R., Condit R., Aguilar S. and Lao S. (2001). Floristic composition across a climatic gradient in a neotropical lowland forest. Journal of Vegetation Science 12: 553-566.

Condit R., Pitman N., Leigh E.G., Chave J., Terborgh J., Foster R.B., Nunez P., Aguilar S., Valencia R., Villa G., Muller-Landau H.C., Losos E. and Hubbell, S.P. (2002). Beta-diversity in tropical forest trees. Science 295: 666-669.

De Caceres M., P. Legendre, R. Valencia, M. Cao, L.-W. Chang, G. Chuyong, R. Condit, Z. Hao, C.-F. Hsieh, S. Hubbell, D. Kenfack, K. Ma, X. Mi, N. Supardi Noor, A. R. Kassim, H. Ren, S.-H. Su, I-F. Sun, D. Thomas, W. Ye and F. He. (2012). The variation of tree beta diversity across a global network of forest plots. Global Ecology and Biogeography 21: 1191-1202

Examples

1

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