Data from: The natural history of the South Hills crossbill in relation to its impending extinction

Benkman CW

Date Published: August 1, 2016

DOI: http://dx.doi.org/10.5061/dryad.cm586

 

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Title Days with temperatures above 32 degrees C
Downloaded 2 times
Description The dates and maximum temperatures at the Magic Mountain SNOTEL site when temperatures reached 32 degrees C between 1989 and 2015.
Download hot days 1998 to 2015.xlsx (8.921 Kb)
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Title Basal area of lodgepole pine at 67 locations in South Hills
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Description This file contains the data used to estimate basal area at 67 locations in the South Hills, Idaho in 2002 and 2013. The first column is plot identifier, then its latitude, longitude, numbers of lodgepole pine within a 20-m radius in 2002 and 2013, the mean DBH of the these trees, and estimated basal areas.
Download Tree basal areas data .xlsx (8.321 Kb)
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Title distance data, crossbill density estimates 2003-2015
Description These data were used to estimate the density of crossbills between 2003 and 2015. The first 4 columns represent the raw data: year of survey, plot identifier, distance to the nearest group of crossbills, and the number of South Hills crossbills in the group; blanks indicate no crossbills were observed). Columns 6-9 represent estimates of crossbill densities from the data in the first 4 columns (year, mean, lower 95% confidence limit, and upper 95% confidence limit). Columns 10 and 11 represent the mean annual and spring temperatures for the preceding year using data from the Magic Mountain SNOTEL site in the South Hills, Idaho.
Download distance data, crossbill density estimates....xlsx (57.98 Kb)
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Title Annual cone production data
Description The first 17 columns represent the raw cone data, whereas columns 19-22 represent the summary data shown in figure 7. Column 1 is the tree identifier, column 2 is the branch number (5 branches were sampled from each tree), and columns 3-17 represent the number of cones from each year on each branch.
Download Annual cone production data.xlsx (17.49 Kb)
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Title Cone opening temperatures
Description This file provides the mean cone opening temperatures for 1-11 year-old cones from 30 trees (column 2), and the mean cone opening temperatures for 15-20 year-old cones from 32 trees (column 3). These are the data used to produce the inset in figure 9.
Download Cone opening temperatures.xlsx (3.066 Kb)
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Title Cone temperatures
Description These are the maximum surface temperatures of cones from one tree in the South Hills, Idaho recorded in June 2015. The date, the time, the maximum temperature on the cone surface, and the corresponding temperature at the nearby Magic Mountain SNOTEL site are provided. These data are shown in figure 9.
Download Cone temperatures.xlsx (6.237 Kb)
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When using this data, please cite the original publication:

Benkman CW (2016) The natural history of the South Hills crossbill in relation to its impending extinction. The American Naturalist 188(6): 589-601. http://dx.doi.org/10.1086/688904

Additionally, please cite the Dryad data package:

Benkman CW (2016) Data from: The natural history of the South Hills crossbill in relation to its impending extinction. Dryad Digital Repository. http://dx.doi.org/10.5061/dryad.cm586
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