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SLO 1: Analyze Spatial Distribution of Toyon Trees | Portfolium
SLO 1: Analyze Spatial Distribution of Toyon Trees
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June 2, 2018 in Geography
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The research poster, “What is the spatial distribution of Heteromeles Arbutifolia [Toyon Trees] at Big Fisherman’s Cove in Catalina Island, CA,” covers the Course Learning Outcome 1—to look and understand physical geographic data of the biosphere using the scientific method. To find data for this research paper, the research team read one peer-reviewed article from the ProQuest database, for example, David Peri’s “Toyon: Plant of the Season, and websites such as The Jepson Herbarium from the University of California, Berkeley and the Fire Effects Information System from the United States Department of Agriculture. After reading the articles, the researchers learned that Toyon Trees grow at Chaparral communities in Southern California, and wrote a hypothesis for the research poster: Toyon Trees are located at partly shaded, south facing slopes along Deer Valley Trail in Big Fisherman’s Cove. When the researchers arrived at Big Fisherman’s Cove, they evaluated Toyon Trees by identifying its physical features, such as the tree’s height, its ridged leaves, and the leaves’ rough texture, to sperate it from other trees along the Deer Valley Trail. Additionally, the research team interpret the distribution of Toyon Trees at Big Fisherman Cove by using the Garmin Map 62 GPS receiver and wrote notes on the Garmin device to categorize Toyon trees by the biological communities it resides in. Once the research team arrived back to Los Angeles, one of the researchers, Bryant Gomez, created a map using ESRI’s ArcMap software to input Toyon Trees locations (excel file) and used the United States Geological Survey Imager Topo Map Server as a base layer for the map. By compiling all the Toyon Trees locations on the map, the research team analyzed that Toyon Trees grow in the Chaparral biological community, as well as grassland and costal sage scrub communities. As a result, the data supports the researcher’s hypothesis, Toyon Trees does grow at partly shaded, south facing slopes at Deer Valley Trail.

Works Cited:
McMurray, Nancy. “Heteromeles arbutifolia.” Fire Effects Information System. 1990.
Peri, David. "Toyon: Plant of the Season." News from Native California, vol. 14, no. 3, Mar 31,
2001, pp. 9, ProQuest.
Phipps, James. “Heteromeles arbutifolia.” in Jepson Flora Project. 2012. Web.
Thornton, Annie. “Great Design Plant: Toyon.” Houzz, 12 Dec. 2011.
Wilson, Bert. "Toyon and Christmas Berry.” Las Pilitas Nursery. Jan 07, 2014. Web.
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Bryant Gomez

4 Skills

3 Teammates

Ammar Alshawosh
Anton Prather
Bryan Delgadillo

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