countryside: A sar_countryside dataset describing vascular plants in a...
In txm676/mmSAR2: Fit and Compare Species-Area Relationship Models Using Multimodel Inference
countryside R Documentation
A sar_countryside dataset describing vascular plants in a multi-habitat
landscape in Portugal
Description
A sample dataset in the correct sar_countryside format: for a set of sites,
contains the areas of different habitat types, and the numbers of species in
different habitat affinity groups. Data are nested.
Usage
data(countryside)
Format
A data frame with 7 columns and 425 rows. Each row contains the area
of three habitats in a site (first three columns: agricultural land - AG;
shrubland - SH; oak forest - QF), and the number of species in the site in
each of four habitat affinity groups (columns 4-7; names match habitats,
except for UB which stands for ubiquitous species). Note that the area and
species richness columns are in the same order (e.g., AG is first for
both), with the UB richness column last.
Details
Data are from Proença & Pereira (2013). The sampling design involved
selecting five 512m×512m habitat mosaics with different land-cover
composition. 64 sampling plots of 1m2 (1m×1m) were then set in each mosaic,
and presence and percentage cover data of understory plant species
(excluding adult trees) recorded. The disposition of sampling plots
followed a nested design: 1m2 sampling plots were aggregated in groups of
four, each plot placed on a corner of a 8m×8m square (64m2), then 8m×8m
squares were aggregated in a similar way to form 64m×64m squares (4096m2)
and these were finally aggregated in one square (habitat mosaic) measuring
512m×512m (26.2 ha). Species–area relationships were then fitted to these
data at the landscape level using nested species–area data at 1m2, 64m2,
4096m2 and 26.2 ha. Fitted curves were thus similar to a Type IIIA curve
(Scheiner, 2003).
Source
Proença, V. & Pereira, H.M. (2013) Species–area models to assess
biodiversity change in multi-habitat landscapes: the importance of species
habitat affinity. Basic and Applied Ecology, 14, 102–114.
Scheiner, S.M. (2003) Six types of species-area curves. Global Ecology and
Biogeography, 12, 441–447.
Examples
data(countryside)
txm676/mmSAR2 documentation built on Nov. 21, 2024, 5:03 a.m.
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| countryside | R Documentation |
A sar_countryside dataset describing vascular plants in a multi-habitat landscape in Portugal
Description
A sample dataset in the correct sar_countryside format: for a set of sites, contains the areas of different habitat types, and the numbers of species in different habitat affinity groups. Data are nested.
Usage
data(countryside)
Format
A data frame with 7 columns and 425 rows. Each row contains the area of three habitats in a site (first three columns: agricultural land - AG; shrubland - SH; oak forest - QF), and the number of species in the site in each of four habitat affinity groups (columns 4-7; names match habitats, except for UB which stands for ubiquitous species). Note that the area and species richness columns are in the same order (e.g., AG is first for both), with the UB richness column last.
Details
Data are from Proença & Pereira (2013). The sampling design involved selecting five 512m×512m habitat mosaics with different land-cover composition. 64 sampling plots of 1m2 (1m×1m) were then set in each mosaic, and presence and percentage cover data of understory plant species (excluding adult trees) recorded. The disposition of sampling plots followed a nested design: 1m2 sampling plots were aggregated in groups of four, each plot placed on a corner of a 8m×8m square (64m2), then 8m×8m squares were aggregated in a similar way to form 64m×64m squares (4096m2) and these were finally aggregated in one square (habitat mosaic) measuring 512m×512m (26.2 ha). Species–area relationships were then fitted to these data at the landscape level using nested species–area data at 1m2, 64m2, 4096m2 and 26.2 ha. Fitted curves were thus similar to a Type IIIA curve (Scheiner, 2003).
Source
Proença, V. & Pereira, H.M. (2013) Species–area models to assess biodiversity change in multi-habitat landscapes: the importance of species habitat affinity. Basic and Applied Ecology, 14, 102–114.
Scheiner, S.M. (2003) Six types of species-area curves. Global Ecology and Biogeography, 12, 441–447.
Examples
data(countryside)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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