Browsing Forestry by Title
Now showing items 161-180 of 391
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Greenhouse gas flux in canopy soils and forest floor soils in coastal old-growth bigleaf maples in temperate rainforests of Western Washington
As a whole, forest ecosystems sequester carbon from the atmosphere and serve as an enormous pool for carbon storage in their soils and vegetation. As climate change accelerates due to the buildup of greenhouse gases (GHGs) ... -
Greenspace, mental health, and psychological well-being: Exploring mechanisms and effect modification
In an age where humans are spending an unprecedented portion of their time indoors, disconnected from nature and unaware of the ecosystem that surrounds them, research is beginning to unveil the intricate role of nature ... -
Habitat connectivity and spotted owl population dynamics
(1995)The ecological consequences of habitat fragmentation include the direct effects of habitat loss and the indirect effects of reduced inter-patch dispersal. I examine these consequences of habitat fragmentation through two ... -
Harvest intensity and competing vegetation control have little effect on soil carbon and nitrogen pools in a Pacific Northwest Douglas-fir plantation
(2013-07-25)Increasing demand for timber as well as current interest in the use of woody biomass for energy and chemical production may result in higher quantities of organic matter removal from plantation forests than currently occurs ... -
Harvest Pierce County as a Model for Community Garden Programs: Analysis of a County- Level Collaborative Effort to Reduce Waste, Build Soil, and Connect to Community.
Past community garden research focused on benefits without consideration of garden usage. However, garden usage has implied weight on benefits provided by gardens. The Harvest Pierce County Community Garden Program is ... -
Heterogeneous Catalytic Oligomerization of Ethylene
Throughout this work, we report results for the oligomerization of ethylene over Ni-H in a packed bed reactor. We performed a parameterized study over temperature (30ºC-190ºC), pressure (8.5-25.6 bar), and weighted hourly ... -
HISTORICAL DISTURBANCE AND RECENT MANAGEMENT FACTORS DRIVING QUERCUS GARRYANA VEGETATION COMMUNITIES IN THE PUGET SOUND LOWLANDS
Garry oak (Quercus garryana) ecosystems used to cover 111,000 hectares in the Puget Sound, yet currently occupy approximately 3% of this former land area. Today, most Garry oak systems are fragmented and remain outside of ... -
Historical forest conditions in frequent-fire forests on the eastern slopes of the Oregon Cascade Range
Records from a 1914-25 timber inventory of the forested areas on two large Indian reservations reveal historical conditions at the landscape-level in fire-prone forests in the eastern Cascade Range in Oregon. Live conifers ... -
Holistic Environmental Thinking: What Western Audiences Can Learn from Indigenous Land Management
New approaches need to be considered for environmental science education and environmental management in the United States. Current approaches to K-12 and college level STEM education tend to exclude or marginalize diverse ... -
Holocene fire history of a coastal temperate rain forest, Vancouver Island, British Columbia, Canada
(2000)The current lack of information about the temporal and landscape pattern of fires is a key source of uncertainty about natural disturbance regimes in coastal temperate rain forests. Two approaches were employed to examine ... -
Holocene vegetational history of the central Arctic foothills, northern Alaska: pollen representation of tundra and edaphic controls on the response of tundra to climate change
(2002)As arctic tundra responds to climate change, does its response vary spatially because of small-scale edaphic heterogeneity? This research addresses this question by reconstructing the past vegetational response to climate ... -
Host selection behavior of the Douglas-fir pitch moth, Synanthedon novaroensis (Hy. Edwards) (Lepidoptera:Sesiidae), related to intermediate silvicultural activities
(1998)The Douglas-fir pitch moth (DFPM), Synanthedon novaroensis, is attracted to exudations of oleoresin and oviposits at wounds on the bole of host trees. Larvae then feed in subcortical regions of vigourously growing hosts. ... -
Hydropyrolysis of Lignin using Pd/HZSM-5
The aim of this work was to study the formation of cycloalkanes from hydropyrolysis of lignin with HZSM-5 and Pd/HZSM-5 catalysts. We observed that palladium supported on HZSM-5 catalyzed hydrogenation and deoxygenation ... -
Identification Of Habitat Controls On Amphibian Populations: The Northern Red-Legged Frog In The Pacific Northwest
(2013-07-25)Historically, research addressing vulnerability of stillwater-breeding amphibians focused on reproductive (aquatic) habitat. However, in the Pacific Northwest (PNW), terrestrial (active-season) habitat is also important ... -
Identifying Mycorrhizas Present in Bigleaf Maple Canopy and Forest Floor Soils in a Coastal Old-Growth Temperate Rainforest in Western Washington
The temperate rainforests of Western Washington are known for their old-growth forests and unique ecosystem processes. In these stands of old-growth, it is common for trees to be 200-300 years old. On branches, Epiphytic ... -
Impact of Gap Size on Environmental Conditions, Survival, and Early Growth of 5 Pacific Northwest Species
The formation of forest gaps and their resulting size and shape is highly variable across forest types and can produce a wide range of patterns in seedling establishment. The impact of gap size on microclimate and seedling ... -
Impact of Urban Residuals-Based Amendments on Soil Health, Crop Yield, and Nutritional Quality
Biosolids and food scraps are highly prevalent in urban waste streams and can be stabilized for beneficial use as soil amendments. The impact of these amendments on soil health and crop response was tested for two urban ... -
Impacts of Re-colonizing Gray Wolves on Mule Deer and White-tailed Deer in North-Central Washington
Previous research on gray wolves (Canis lupus) in protected landscapes demonstrates these large carnivores can have consumptive and non-consumptive effects on prey species which lead to top-down trophic cascades. However, ... -
Impacts on Cultural Sovereignty and the Exercise of Reserved and Treaty-Protected Rights of Tribal People of the Pacific Northwest Plateau
Today, all global people are experiencing climate change impacts on lands and waters. They are challenged in how to mitigate or restore environments impacted by chemical pollution, over-application of fertilizers, and ... -
Impacts on Cultural Sovereignty and the Exercise of Reserved and Treaty-Protected Rights of Tribal People of the Pacific Northwest Plateau
Today, all global people are experiencing climate change impacts on lands and waters. They are challenged in how to mitigate or restore environments impacted by chemical pollution, overapplication of fertilizers, and ...