This data frame contains site location, landscape context and dominant plant species abundances for 25 of the plant species found in 50 grazed pastures in the northeastern United States. Elements are the mean values for canopy cover for ten 0.5 x 2 m quadrats.
data(graze)A data frame with 50 observations on the following 25 variables.
sitelocationSite location along a geographic gradient.
forestpctPercentage forest cover within a 1-km radius.
ACMI2Percentage canopy cover.
ANODPercentage canopy cover.
ASSYPercentage canopy cover.
BRIN2Percentage canopy cover.
CIAR4Percentage canopy cover.
CIINPercentage canopy cover.
CIVUPercentage canopy cover.
DAGLPercentage canopy cover.
ELRE4Percentage canopy cover.
GAMOPercentage canopy cover.
LOAR10Percentage canopy cover.
LOCO6Percentage canopy cover.
LOPEPercentage canopy cover.
OXSTPercentage canopy cover.
PLMA2Percentage canopy cover.
POPRPercentage canopy cover.
PRVUPercentage canopy cover.
RAAC3Percentage canopy cover.
RUCRPercentage canopy cover.
SORU2Percentage canopy cover.
STGRPercentage canopy cover.
TAOFPercentage canopy cover.
TRPR2Percentage canopy cover.
TRRE3Percentage canopy cover.
VEOF2Percentage canopy cover.
Sarah Goslee
Site locations fall along a southwest-northeast transect through the northeastern United States. This is a synthetic gradient calculated from latitude and longitude. Forest landcover is taken from the USGS 1992 National Land Cover Dataset. All forest classes were combined, and the percentage within 1 km of the sample sites was calculated using a GIS.
Tracy, B.F. and M.A. Sanderson. 2000. Patterns of plant species richness in pasture lands of the northeast United States. Plant Ecology 149:169-180.
Goslee, S.C., Sanderson, M.A. 2010. Landscape Context and Plant Community Composition in Grazed Agricultural Systems. Landscape Ecology 25:1029-1039.