Graduate Thesis Or Dissertation
 

Predicting urban tree attributes for major species in urbanized areas of the western Pacific states

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/j9602397v

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  • Urban forests are an essential green infrastructure of our cities. Due to the proximity of urban trees to more than 250 million people and the grey infrastructure within United States cities, urban forests are uniquely positioned to provide a host of social, environmental and economic benefits. Careful management that maximizes benefits of the urban forest while minimizing cost is necessary for healthy, livable urban areas. A key component to effective forest management is inventory. The United States government regularly inventories forestland trees at present but efforts have begun to extend this monitoring effort to urban forests as well. This study utilizes the first Urban Forest Inventory and Analysis (FIA) from the states of Washington, Oregon and California. Not only does this inventory help to identify the structure, composition, health and benefit of urban forests in these states, but it also provides an unprecedented opportunity to develop regional urban tree attribute models. This work develops species-specific models for predicting tree height, height to crown base and largest crown width for five principal species represented in the inventory including Douglas-fir (Pseudotsuga menziesii), red alder (Alnus rubra), western redcedar (Thuja plicata), big leaf maple (Acer macrophyllum) and oak (Quercus spp.). Models can be calibrated with localized data and used for obtaining additional information on the structure of the urban forest when field measurements are unobtainable or costly. Height and canopy attributes are important components for understanding the extent of the benefits imposed by the urban forest.
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