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Variation in size of junipers in the Nature Park

Eric Tandy and Tyler Hume


The purpose of this study was to determine the ways juniper trees grow based on their location within the Nature Park.  We characterized tree growth according to height, circumference, volume, sunlight, canopy exposure, and soil.


We hypothesized that juniper trees measured near the Field Station would be taller and larger in circumference.  We hypothesized that juniper trees measured in the Quarry Bottom would be shorter and smaller in circumference due to soil conditions and exposure.


We selected five sites:  Field Station, Quarry Bottom, North Cover, West Cover, and South Cover.  At each site, we measured height and circumference of 20 trees.  


Trees were significantly taller at the Field Station, intermediate in height at North Cover, West Cover, and South Cover, and shortest in the Quarry Bottom.  Tree circumference was significantly larger at the Field Station and significantly smaller in the Quarry Bottom.


We conclude that several factors affect tree growth within each site:  sunlight, soil, competition, and availability of resources.


Wikipedia.  "Juniper."

Kansas State University.  2014.  Red cedar tree study shows that Clean Air Act is reducing pollution, improving forests.

U.S. Forest Service.  2014.  Juniperus virginiana