acorns: Acorn Size and Geographical Range

In speegled/fosdata: Data for use with the book "Probability, Statistics, and Data: A Fresh Approach Using R", by Darrin Speegle and Bryan Clair

Acorn Size and Geographical Range

Description

Acorn size, tree height and geographic range for 39 species of oak (Quercus L.) native to North America.

Usage

acorns

Format

A data frame with 39 observations of 5 variables.

Species

Oak species.

Region

Area of prevalence. Atlantic or California.

Range

Geographic range area, km^2 x 100.

Acorn_size

In cm^3. Estimated from Sargent (1961) except trees 4, 15, 16, 33.

Tree_height

In meters. Estimated from Sargent (1961) except trees 16, 38.

Details

From the authors: "Seed size can be an important factor influencing the extent of the range of a plant species that has recently expanded or shifted the area it occupies as a consequence of climatic changes. A positive correlation exists between acorn size and geographical range of the North American oaks (Quercus L.) of eastern North America. An independent analysis of oaks native to the California region suggests that this is a continental pattern." Oak 39, Quercus tomentella Engelm, is only found on islands off the western coast.

Source

Aizen, Marcelo & Patterson III, William. (1990). Acorn Size and Geographical Range in the North American Oaks (Quercus L.). Journal of Biogeography. 17. 327. 10.2307/2845128. https://www.jstor.org/stable/2845128

speegled/fosdata documentation built on Feb. 8, 2025, 8:17 a.m.