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The Effects of Canopy Cover on Soil Texture and Color in the Ribbon Forest and Glade

This study examines how different canopy cover and vegetation in Ribbon Forest and Glade affect soil color and texture. The research compares soil samples from both areas and analyzes the amount of litter present. The results indicate a significant difference in soil texture and litter layer, but not in soil color. The findings suggest that Ribbon Forest has a darker yellowish-brown color and sandy loam texture, while Ribbon Glade has a darker brown color and clay loam texture with a thinner litter layer. The study acknowledges limitations such as a small sample size and difficulties in obtaining soil in certain areas.

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The Effects of Canopy Cover on Soil Texture and Color in the Ribbon Forest and Glade

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  1. The Effects of Canopy Cover on Soil Texture and Color in the Ribbon Forest and Glade Tina Nguyen Vegetation Ecology Summer 2018 CU Mountain Research Station

  2. Introduction • Factors influenced by the forest(MacKinney, 1929) (Anderson, et al. 1968) • Temperature • Amount and intensity of precipitation reaching soil • Sunlight • Depth of litter • The litter layer affects the soil (Nagler, et al. 2000) • Nutrients • Carbon • Water • Energy • The biota influences the soil in the Ribbon Forest and Glade

  3. Introduction Question: How does the different canopy cover and vegetation cover in the Ribbon Forest and the Ribbon Glade affect the soil color and soil texture?

  4. Introduction Ho: There is no significant difference in the soil between the Ribbon Forest and Glade. HA: There is significant difference in the soil between the Ribbon Forest and Glade.

  5. Methods Location: Ribbon Forrest and Glade near Cable Gate, Niwot Ridge Canopy Cover in Forest is greater than 80% • Three sites of Ribbon Forest and Glade • Three plots on each site • Measured the litter layer • The Munsell Color to determine the color of soil • The Ribbon test to determine the soil texture (Thien, 1979) • Total of 18 samples of soil

  6. Methods • Limitations • Small number of samples • Hard to obtain soil in areas • Other materials in soil

  7. Results s

  8. Results s

  9. Results s

  10. Summary of Results • There is not significant difference in soil color • p= 0.0563 • There is significant difference in soil texture • p= 0.0001** • There is significant difference in amount of litter • p= 0.0033***

  11. Discussion • Data is not a significant difference but here’s the pattern • Soil color in the Ribbon Glade • Dark Brown • Soil color in the Ribbon Forest • Dark Yellowish Brown • Decomposed pine needles made soil in the Ribbon Forest very gritty • Litter affects the soil in forest (Pescott, 2000) • Layer of litter was generally less than 1 cm in Ribbon Glade and the soil was more fine.

  12. Conclusion • Not significant difference in soil color • Significant difference in soil texture and litter layer • Suggested Patterns • Ribbon Forest • Dark yellowish brown • Sandy Loam • Range of depth of litter layer • Ribbon Glade • Dark brown • Clay loam • <1 cm of litter layer

  13. Literature Cited • Anderson, R. C., O. L. Loucks, and A. M. Swain. "Herbaceous Response to Canopy Cover, Light Intensity, and Throughfall Precipitation in Coniferous Forests." Ecology, vol. 50, no. 2, 1969, pp. 255-263. DOI: 10.2307/1934853 • MacKinney, A. L. "Effects of forest litter on soil temperature and soil freezing in autumn and winter." Ecology 10.3 (1929): 312-321. DOI: 10.2307/1929507 • Nagler, P. L., C. S. T. Daughtry, and S. N. Goward. "Plant litter and soil reflectance." Remote Sensing of Environment 71.2 (2000): 207-215. DOI: 10.1016/S0034-4257(99)00082-6 • Prescott, Cindy E. "The influence of the forest canopy on nutrient cycling." Tree physiology 22.15-16 (2002): 1193-1200. DOI: 10.1093/treephys/22.15-16.1193 • Thien, Steve, “A flow diagram for teaching texture-by-feel analysis, “Journal of Agronomic Education, 1979, vol. 8, pp. 54-55. Cited in soil handout

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