Tree Canopy Cover And Potential In Portland Or
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Tree Canopy Cover And Potential In Portland Or
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Author :
language : en
Publisher:
Release Date : 2019
Tree Canopy Cover And Potential In Portland Or written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Forest canopies categories.
Urban forests have positive impacts on human and ecosystem health, reduce stress on aging stormwater infrastructure, increase property values, and reduce energy consumption. The scale of these benefits ranges from the hyper-local to the global. While the benefits of urban forests can extend well beyond the boundaries of cities, they often do not reach all residents of the city equally. Urban forest policies do not adequately address environmental equity or employ planting strategies with knowledge of the social and political factors that determine the spatial variations of tree canopy extent in cities. Chapter I analyzes the determinants of current canopy extent in Portland, OR using spatial regression analysis. Chapter II uses current landcover datasets to identify potential planting opportunities. Results of spatial regression show that income and education level are significantly positively linked to tree canopy, while sewer pipe density, an indicator of development, is negatively associated with canopy. The majority of tree canopy and potential in the city occurs on private, residential lands. Distribution of canopy potential is not even, with greater amounts in north and outer east side areas. Findings presented here will inform efforts to expand tree canopy in Portland in a manner that is spatially explicit and based on Portland's unique demographics, land use assemblage, and development policies.
Los Angeles 1 Million Tree Canopy Cover Assessment
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Author : E. Gregory McPherson
language : en
Publisher: DIANE Publishing
Release Date : 2010-11
Los Angeles 1 Million Tree Canopy Cover Assessment written by E. Gregory McPherson and has been published by DIANE Publishing this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-11 with Nature categories.
The Million Trees LA initiative intends to chart a course for sustainable growth through planting and stewardship of trees. This study measures LA's existing tree canopy cover (TCC), determines if space exists for 1 million additional trees, and estimates future benefits from the planting. Benefits were forecast for planting of 1 million trees between 2006 and 2010, and their growth and mortality were projected until 2040. LA's existing TCC was 21%. There is potential to add 2.5 million additional trees to the existing population of 10.8 million, but only 1.3 million of the potential tree sites are deemed realistic to plant. Thus, there is space for planting 1 million new trees. Benefits for the 1-million-tree planting were between $1.33 band $1.95 billion.
Urban Forest Canopy Cover In Portland Oregon 1972 2002
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Author : Joseph Poracsky
language : en
Publisher:
Release Date : 2004
Urban Forest Canopy Cover In Portland Oregon 1972 2002 written by Joseph Poracsky and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Urban forestry categories.
Portland S Urban Forestry Canopy
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Author :
language : en
Publisher:
Release Date : 2007
Portland S Urban Forestry Canopy written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Urban forestry categories.
Los Angeles 1 Million Tree Canopy Cover Assessment
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Author :
language : en
Publisher:
Release Date : 2008
Los Angeles 1 Million Tree Canopy Cover Assessment written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Trees in cities categories.
The Million Trees LA initiative intends to chart a course for sustainable growth through planting and stewardship of trees. The purpose of this study was to measure Los Angeles's existing tree canopy cover (TCC), determine if space exists for 1 million additional trees, and estimate future benefits from the planting. Highresolution QuickBird remote sensing data, aerial photographs, and geographic information systems were used to classify land cover types, measure TCC, and identify potential tree planting sites. Benefits were forecast for planting of 1 million trees between 2006 and 2010, and their growth and mortality were projected until 2040. Two scenarios reflected low (17 percent) and high (56 percent) mortality rates. Numerical models were used with geographic data and tree size information for coastal and inland climate zones to calculate annual benefits and their monetary value. Los Angeles's existing TCC was 21 percent, and ranged from 7 to 37 percent by council district. There is potential to add 2.5 million additional trees to the existing population of approximately 10.8 million, but only 1.3 million of the potential tree sites are deemed realistic to plant. Thus, there is space for planting 1 million new trees. Benefits for the 1-million-tree planting for the 35-year period were $1.33 billion and $1.95 billion for the high- and low-mortality scenarios, respectively. Average annual benefits were $38 and $56 per tree planted. Eighty-one percent of total benefits were aesthetic/other, 8 percent were stormwater runoff reduction, 6 percent energy savings, 4 percent air quality improvement, and less than 1 percent atmospheric carbon reduction. Recommendations included developing a decisionsupport tool for tree selection and tracking, as well as establishing a model parking lot greening program.
Canopy Structure On Forest Lands In Western Oregon
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Author : United States Department of Agriculture
language : en
Publisher: CreateSpace
Release Date : 2015-02-14
Canopy Structure On Forest Lands In Western Oregon written by United States Department of Agriculture and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-14 with categories.
Canopy structure is an important attribute affecting economic and ecological values of forests in the Pacific Northwest. However, canopy cover and vertical layering are rarely measured directly; they are usually inferred from other forest measurements. In this study, we quantified and compared vertical and horizontal patterns of tree canopy structure and understory cover along a successional gradient of forests and among stands with different thinning histories on nonfederal lands in western Oregon. Analyses focused on three dominant forest type groups: wet conifer, wet hardwood, and dry hardwood. We used data from 917 systematically located, forested Forest Inventory and Analysis plots measured between 1995 and 1997. On each plot, canopy cover by layer and species was measured on line-intercept transects, and cover of understory species was measured on five subplots. Trends in canopy structure with stand age did not always follow the patterns predicted by common successional models. Most of the cover in moist stands was in the upper tree layer, but cover in dry hardwood stands was more evenly distributed among layers. Contrary to expectations of canopy closure, mean canopy cover by age class rarely exceeded 85 percent, even in unthinned productive young conifer forests. Possibly as a result, effects of stand age on understory vegetation were minimal, except for low levels of forbs found in 20- to 40-year-old wet conifer stands. Shadetolerant tree species rarely made up more than 20 percent of canopy cover, even in the lower canopy layers and in stands >100 years old. Although heavily thinned stands had lower total cover, canopy structure did not differ dramatically between thinned and unthinned stands. Our findings suggest potential limitations of simple stand succession models that may not account for the range of forest types, site conditions, and developmental mechanisms found across western Oregon.
Canopy Structure On Forest Lands In Western Oregon
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Author : Anne C. S. McIntosh
language : en
Publisher:
Release Date : 2011-01
Canopy Structure On Forest Lands In Western Oregon written by Anne C. S. McIntosh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-01 with categories.
This is a print on demand edition of a hard to find publication. This study quantified and compared vertical and horizontal patterns of tree canopy structure and understory cover along a successional gradient of forests and among stands with different thinning histories on non-federal lands in western Oregon. Analyses focused on three dominant forest type groups: wet conifer, wet hardwood, and dry hardwood. Most of the cover in moist stands was in the upper tree layer, but cover in dry hardwood stands was more evenly distributed among layers. Findings suggest potential limitations of simple stand succession models that may not account for the range of forest types, site conditions, and developmental mechanisms found across western Oregon. Charts and tables.
Canopy Structure On Forest Lands In Western Oregon
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Author : Anne C. S. McIntosh
language : en
Publisher:
Release Date : 2009
Canopy Structure On Forest Lands In Western Oregon written by Anne C. S. McIntosh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Forest canopies categories.
Canopy structure is an important attribute affecting economic and ecological values of forests in the Pacific Northwest. However, canopy cover and vertical layering are rarely measured directly; they are usually inferred from other forest measurements. In this study, we quantified and compared vertical and horizontal patterns of tree canopy structure and understory cover along a successional gradient of forests and among stands with different thinning histories on nonfederal lands in western Oregon. Analyses focused on three dominant forest type groups: wet conifer, wet hardwood, and dry hardwood. We used data from 917 systematically located, forested Forest Inventory and Analysis plots measured between 1995 and 1997. On each plot, canopy cover by layer and species was measured on line-intercept transects, and cover of understory species was measured on five subplots. Trends in canopy structure with stand age did not always follow the patterns predicted by common successional models. Most of the cover in moist stands was in the upper tree layer, but cover in dry hardwood stands was more evenly distributed among layers. Contrary to expectations of canopy closure, mean canopy cover by age class rarely exceeded 85 percent, even in unthinned productive young conifer forests. Possibly as a result, effects of stand age on understory vegetation were minimal, except for low levels of forbs found in 20- to 40-year-old wet conifer stands. Shade-tolerant tree species rarely made up more than 20 percent of canopy cover, even in the lower canopy layers and in stands >100 years old. Although heavily thinned stands had lower total cover, canopy structure did not differ dramatically between thinned and unthinned stands. Our findings suggest potential limitations of simple stand succession models that may not account for the range of forest types, site conditions, and developmental mechanisms found across western Oregon.
Los Angeles 1 Million Tree Canopy Cover Assessment
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Author : United States Department of Agriculture
language : en
Publisher: CreateSpace
Release Date : 2015-06-26
Los Angeles 1 Million Tree Canopy Cover Assessment written by United States Department of Agriculture and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-06-26 with categories.
The Million Trees LA initiative intends to chart a course for sustainable growth through planting and stewardship of trees. The purpose of this study was to measure Los Angeles's existing tree canopy cover (TCC), determine if space exists for 1 million additional trees, and estimate future benefits from the planting. Highresolution QuickBird remote sensing data, aerial photographs, and geographic information systems were used to classify land cover types, measure TCC, and identify potential tree planting sites.
Radical Adaptation
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Author : Brian Stone
language : en
Publisher: Cambridge University Press
Release Date : 2024-01-18
Radical Adaptation written by Brian Stone and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-01-18 with Law categories.
First book to explore the adaptive transformations required to manage climate-related shocks beginning to play out in cities worldwide.