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- Bats -- Conservation (1)
- Campus planning -- Environmental aspects -- Oregon -- Portland (1)
- Carex -- Growth -- Oregon -- Tualatin River Watershed (1)
- Carex -- Mortality -- Oregon -- Tualatin River Watershed (1)
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- Climatic changes -- Sri Lanka (1)
- Ecosystem services -- Valuation -- Sri Lanka (1)
- Environmental justice (1)
- Forest canopy gaps -- Oregon -- Siuslaw National Forest -- Case studies (1)
- Forest ecology -- Oregon -- Portland (1)
- Forest fires -- Climatic factors -- Sri Lanka (1)
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- Forest management -- Sri Lanka (1)
- Forests and forestry -- Economic aspects -- Sri Lanka (1)
- Forests and forestry -- Sri Lanka (1)
- Fresh water -- Oregon -- Management (1)
- Herbaceous plants -- Propagation -- Oregon -- Portland (1)
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- Restoration ecology (1)
- Revegetation -- Environmental aspects -- Oregon -- Portland (1)
- Runoff -- Environmental aspects -- Oregon (1)
- Soils -- Quality -- Oregon -- Portland (1)
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- Turtles -- Nests -- Effect of human beings on (1)
- Turtles -- Nests -- Oregon -- Willamette River Watershed (1)
- Understory plants -- Oregon -- Portland (1)
- Urban runoff -- Oregon -- Management (1)
- Water-supply -- Government policy -- Oregon (1)
- Watershed management -- Citizen participation (1)
Articles 1 - 8 of 8
Full-Text Articles in Physical Sciences and Mathematics
Closed Canopies Crowd Out Bats: Planning Artificial Gap Creation, Alana Simmons
Closed Canopies Crowd Out Bats: Planning Artificial Gap Creation, Alana Simmons
Environmental Science and Management Professional Master's Project Reports
Managed even-aged forest stands often lack small to medium-sized canopy gaps that help to increase habitat diversity and, in turn, wildlife diversity. A large body of literature suggests that this habitat diversity is especially important for bat communities and that bat activity and diversity can be depressed in closed canopy, even-aged stands. Open- and edge-adapted bats have evolved specific wing morphologies and echolocation call structures that make them reliant upon forest gaps as energy efficient foraging grounds in otherwise structurally cluttered forests. Artificial gap creation projects that increase habitat diversity have been implemented to benefit ungulates, and a similar approach …
Project To Establish Growth & Mortality Rates Of Three Carex Species In Two Planting Types At Thomas Dairy Site, Tigard, Oregon, Ben Huffine
Environmental Science and Management Professional Master's Project Reports
Clean Water Services (CWS) currently increases the diversity of their wetland restoration projects using a plug planting method utilizing juvenile herbaceous plants. They have planted most of their projects using this method and plan to continue until a better one is discovered. According to the literature reviewed in this paper, juvenile plants are smaller and weaker than more mature plants and therefore have higher mortality rates. This paper is the culmination of work completed of phase 1 of this two-phase project. The objective of this project (both phases) was to design and establish a study that would test, in the …
Influence Of Climate Change On Forest Fire Occurrence And Distribution Of Sri Lanka And Modeling Of Forest Fire, Mohan Heenatigala
Influence Of Climate Change On Forest Fire Occurrence And Distribution Of Sri Lanka And Modeling Of Forest Fire, Mohan Heenatigala
Environmental Science and Management Professional Master's Project Reports
Forest fire is one of the main causes for forest degradation and deforestation which affect ecosystem services provided by the given landscapes. Weather variables like temperature, wind speed and direction, rainfall, and relative humidity also govern the forest fire regime and vulnerability. On the other hand, forest fuel characteristics, human impacts, population density, forest canopy density, slope, elevation, road density, closeness to the human settlement areas are other factors that determine the forest fire impact and potential of damage. Annually, 100 to 2500 hectares of forest resources are damaged due to forest fires in Sri Lanka. From the past few …
Understory Species Increase Project: Investigating The Revegetation Of Native Herbaceous Species From Seed In Urban Forest Fragments, Erin Mcelroy
Environmental Science and Management Professional Master's Project Reports
Management of urban forest fragments often aims to reduce invasive species and promote native species abundance and diversity. Often, these environments lack natural establishment of native forest species, including herbaceous species that are especially sensitive to site conditions. While herbaceous understory species may represent a small proportion of forest biomass, they perform important functions within forest environments, including nutrient cycling, erosion and runoff control, and providing habitat for wildlife, as well as hosting the greatest biodiversity among other forest strata. However, many restoration projects focus primarily on the revegetation of dominant woody forest species, such as hardwood trees and shrubs. …
Economic Valuation Of Ecosystem Services Provided By Forest Ecosystems In Sri Lanka: A Study Based On 2010 Forest Cover Classification And The Teeb Database, Isuru Jayantha Alawaththa Kankanamge
Economic Valuation Of Ecosystem Services Provided By Forest Ecosystems In Sri Lanka: A Study Based On 2010 Forest Cover Classification And The Teeb Database, Isuru Jayantha Alawaththa Kankanamge
Environmental Science and Management Professional Master's Project Reports
Ecosystem service valuation is becoming popular among the economists, ecologists, scientists and policy makers. As a result, various research, publications and programs have arisen and content of literature is developed rapidly. Even though this field of study is developing rapidly, Sri Lankan ecosystems have not yet been valued or evaluated yet in terms of economic returns. Hence, the main purpose of this study is to calculate and define economic value for each forest polygon of 2010 forest cover data base by using the value transferring approach. This data base will be an effective tool to have a fair cost-benefits analyses …
Current Stormwater Practices And Future Implementation At Portland State University With The Uncertainty Of Climate Change, Evan Suemori, Alexandra Vargas Quiñones
Current Stormwater Practices And Future Implementation At Portland State University With The Uncertainty Of Climate Change, Evan Suemori, Alexandra Vargas Quiñones
Environmental Science and Management Professional Master's Project Reports
Stormwater runoff is one of the most critical environmental issues in urban areas and is only expected to worsen as climate change persists (EPA, 2016). When precipitation events occur, stormwater travels across impervious surfaces collecting soils and pollutants which can negatively impact water quality in receiving waters. Additionally, stormwater has human health impacts, specifically through flooding and the contamination of drinking water. According to the Intergovernmental Panel on Climate Change (IPCC), it has been determined that climate change will increase the frequency, intensity, and/or number of precipitation events in some regions, including the Pacific Northwest, and decrease in others (IPCC, …
Community Engagement In Oregon Water Governance: Evaluating A State Water Policy And A Collaborative Q Methodology Research Project, Clare T. Mcclellan
Community Engagement In Oregon Water Governance: Evaluating A State Water Policy And A Collaborative Q Methodology Research Project, Clare T. Mcclellan
Environmental Science and Management Professional Master's Project Reports
This work was primarily conducted by the Oregon Water Stories Project, an interdisciplinary research group at Portland State University, in collaboration with the Willamette Partnership, an environmental non-profit in Portland, and with additional involvement from community partner organizations across the state. The overarching goal of this paper is to explore the challenges and opportunities present at the intersections of water management, stakeholder engagement, community-engaged research, and environmental justice. This study investigates this nexus first through an evaluation of Oregon’s 100 Year Water Vision that points to areas for increased integration of environmental justice principles in water policymaking. In the second …
An Examination Of Limiting Factors Of Chrysemys Picta Bellii (Western Painted Turtles) In The Lower Willamette River Basin, Oregon, James P. Holley
An Examination Of Limiting Factors Of Chrysemys Picta Bellii (Western Painted Turtles) In The Lower Willamette River Basin, Oregon, James P. Holley
Environmental Science and Management Professional Master's Project Reports
Oregon’s two native freshwater turtle species, Chrysemys picta bellii (Western painted turtle) and Actinemys marmorata (Northwestern pond turtle), have seen significantly reduced population sizes since the founding of Portland in 1845, with estimates of up to 90% for A. marmorata. This project examined turtle nesting activity at 25 sites across a range of turtle populations and habitats around the Lower Willamette River Basin. All discovered turtle nesting activity was found in areas of high solar exposure. We found 93% of over 400 nest attempts to have been depredated across the 25 sites, well above most other reported rates. At …