DOI: 10.5061/dryad.9cnp5hqzg
title: Tree genus composition of eleven lowland and lower montane tropical rain forests along a pedogenic gradient in northern Borneo

description: The data file contains the community composition at genus level for eleven
 lowland tropical rain forest (LTRF) and lower montane tropical rain forest
 (MTRF) in northern Borneo (the Malaysian state of Sabah), compiled from
 various sources, some of which were not indexed. Plot data include forests
 at Bukit Babi, Mt. Kinabalu (MTRF); Bukit Ular, Mt. Kinabalu (MTRF);
 Danum, Danum Valley (LTRF); Deramakot, Deramakot Forest Reserve (LTRF);
 Nabawan LC, Nabawan Town (LHF); Nabawan SC, Nabawan Town (LHF); Nalumad,
 Mt. Kinabalu (LTRF); PHQ, Mt. Kinabalu (MTRF); Poring, Mt. Kinabalu
 (LTRF); Tawau, Tawau Hill’s Park (LTRF); and Tawau Heath, Tawau Hill’s
 Park (LHF).
description: Plot size of the eleven forests varied depending on forest
 stature, from 4 ha in tall lowland mixed dipterocarp forest to 0.25 ha in
 short-stature montane forest. All trees greater than 10 cm in diameter at
 breast height (dbh) were measured and identified to species. Relative
 abundances of species were derived from relative basal area in each plot.
 Relative abundances of genera were derived by lumping congeneric species
 by genus. Unidentified genera were excluded from the dataset. Tree genera
 include all gymnosperms, angiosperms and a few tree ferns.
  Please see the related articles for a further description of the
 study sites and inventory methods. Aiba S. &
 Kitayama K. (1999) Species composition, structure and species diversity of
 rain forests in a matrix of altitudes and substrates on Mt. Kinabalu,
 Borneo. Plant Ecology 140: 139-157. https://doi.org/10.1023/A:1009710618040  Imai N., Seino T., Aiba S-i., Takyu M., Titin J., Kitayama K. (2012) Effects of selective logging on tree species diversity and composition of Bornean tropical rain forests at different spatial scales. Plant Ecology 213: 1413-1424. https://doi.org/10.1007/s11258-012-0100-y
description: # Tree genus composition of eleven lowland and lower montane tropical rain
 forests along a pedogenic gradient in northern Borneo Dataset DOI:
 [10.5061/dryad.9cnp5hqzg](https://doi.org/10.5061/dryad.9cnp5hqzg) ##
 Description of the data and file structure There are two csv files in this
 paper: 1) Data matrix of the eleven plots, and 2) Site description. The
 file “Data matrix of the eleven plots” contains a data matrix consisting
 of eleven plots (plot name) and 263 tree genera. The file “Site
 description” contains the information on plot locality, forest structure,
 soil chemical properties and data sources. *
 Data_matrix_of_the_eleven_plots.csv: data matrix indicating genus relative
 abundances * Site_description.csv: site descriptions of the eleven plots  
 Structure of the file “Data matrix of the eleven plots” is as follows: 263
 tree genera are sorted alphabetically. Unidentified tree genera are
 excluded from the dataset. Vales in cells indicate relative abundances (%)
 of genera at each plot. Study plots include Bukit Babi, Mt. Kinabalu;
 Bukit Ular, Mt. Kinabalu; Danum, Danum Valley; Deramakot, Deramakot Forest
 Reserve; Nabawan LC, Nabawan Town; Nabawan SC, Nabawan Town; Nalumad, Mt.
 Kinabalu; PHQ, Mt. Kinabalu; Poring, Mt. Kinabalu; Tawau, Tawau Hill’s
 Park; and Tawau Heath, Tawau Hill’s Park. All sites are located in the
 Malaysian state of Sabah in northern Borneo. Exact coordinates are not
 available.   Variable names in the file “Site description” are as follows:
 Plot name: name of the plots as appeared in “Data matrix of the eleven
 plots.” Forest type: type of the forest at each plot. Locality: Locality
 of each plot. Canopy H (m): the height (m) of a tallest tree at each plot.
 Soil N/P: the quotient of soil nitrate concentration to soil inorganic P
 concentration. Nitrate was extracted with 1.5N KCl solution and determined
 colorimetrically, and inorganic P was extracted with 1N NaHCO3 solution
 and determined colorimetrically. All soils are topsoil of 10 or 15-cm
 depth. DC-ext Fe (mg/g): concentration of pedogenic Fe (mg/g) extractable
 in dithionite-citrate solution. For the exact determination method, see
 Wagai et al. (2008) Climate and parent material controls on organic matter
 storage in surface soils: A three-pool, density-separation approach.
 Geoderma 147: 23?33. doi:10.1016/j.geoderma.2008.07.010 Altitude (m):
 altitude (m) of each plot. Data source: source of the data