The Hoary Marmot of the North Cascades in Washington
... variations in slope and aspect significantly impact changes in habitat types throughout the alpine zone. These small and drastic changes demonstrate the sensitivity of the alpine environment. Precipitation and temperature are the major factors as these vary the most through the seasons. In the end, ...
... variations in slope and aspect significantly impact changes in habitat types throughout the alpine zone. These small and drastic changes demonstrate the sensitivity of the alpine environment. Precipitation and temperature are the major factors as these vary the most through the seasons. In the end, ...
A Little Bug with a Big Bite: Impact of Hemlock Woolly Adelgid
... eastern United States [5]. The density of hemlocks in the forests and national parks not only provides aesthetic appeal, but offers shade to help regulate stream temperatures, habitats, and wood for framing, sheathing, subflooring and pulpwood [1,6]. Hemlocks are slow-growing and long-lived trees. A ...
... eastern United States [5]. The density of hemlocks in the forests and national parks not only provides aesthetic appeal, but offers shade to help regulate stream temperatures, habitats, and wood for framing, sheathing, subflooring and pulpwood [1,6]. Hemlocks are slow-growing and long-lived trees. A ...
Miombo Ecoregion Vision Report - Biodiversity Foundation for Africa
... human population and its demand for agricultural land. Large areas of dry woodland, unlike moist forests, can be more easily converted to agricultural land owing to the lower above-ground woody plant biomass, though the social and environmental consequences are probably as profound as with moist for ...
... human population and its demand for agricultural land. Large areas of dry woodland, unlike moist forests, can be more easily converted to agricultural land owing to the lower above-ground woody plant biomass, though the social and environmental consequences are probably as profound as with moist for ...
2007-02 Marine Riparian Vegetation Communities of Puget Sound
... the most productive forests in the world. The Puget Sound region is a centerpiece of that diversity and productivity. The mosaic of forests and vegetation communities in this region are the product of thousands of years of evolution; their composition, structure, and functions are influenced by mult ...
... the most productive forests in the world. The Puget Sound region is a centerpiece of that diversity and productivity. The mosaic of forests and vegetation communities in this region are the product of thousands of years of evolution; their composition, structure, and functions are influenced by mult ...
Wildlife in alpine and sub-alpine habitats
... alpine areas are valued for their intrinsic beauty and wildness, for their recreational potential, and as a refuge from dense urban areas. The alpine zone consists of rugged, partially vegetated terrain with snowfields and rocky ridges, above the natural treeline. Alpine ecosystems are structurally ...
... alpine areas are valued for their intrinsic beauty and wildness, for their recreational potential, and as a refuge from dense urban areas. The alpine zone consists of rugged, partially vegetated terrain with snowfields and rocky ridges, above the natural treeline. Alpine ecosystems are structurally ...
Compensation masks trophic cascades in complex food
... the feeding relationships between interacting species within an ecosystem. Understanding how the complexity of these networks influences their response to changing top-down control is a central challenge in ecology. Here, we provide a model-based investigation of trophic cascades — an oft-studied ec ...
... the feeding relationships between interacting species within an ecosystem. Understanding how the complexity of these networks influences their response to changing top-down control is a central challenge in ecology. Here, we provide a model-based investigation of trophic cascades — an oft-studied ec ...
species accounts - Ministry of Environment
... TFL 23 PEM - Wildlife Species Accounts When the warmth of the Spring (May – late June) begins to melt the winter’s snow the caribou move to areas of early green up such as valley bottom MSdk and ICH forests and, lower elevation ESSF forest and openings adjacent to forests. It is at the lower elevat ...
... TFL 23 PEM - Wildlife Species Accounts When the warmth of the Spring (May – late June) begins to melt the winter’s snow the caribou move to areas of early green up such as valley bottom MSdk and ICH forests and, lower elevation ESSF forest and openings adjacent to forests. It is at the lower elevat ...
Commenter 17
... greatest likelihood of being greater than 150 years of age.” Both statements would lead one to believe that trees over 20” DBH would be carefully considered for retention—as these are the future late seral trees that will compensate for the historic loss of these habitat structure— and all trees ove ...
... greatest likelihood of being greater than 150 years of age.” Both statements would lead one to believe that trees over 20” DBH would be carefully considered for retention—as these are the future late seral trees that will compensate for the historic loss of these habitat structure— and all trees ove ...
6170 Alpine and subalpine calcareous grasslands
... definition, the alpine zone extends up from the treeline as far as the beginning of the snow zone, where plant cover drops below 20%. The treeline is the imaginary line linking the highest elevations where trees at least 3m tall are found in distinct patches. The subalpine zone extends from the timb ...
... definition, the alpine zone extends up from the treeline as far as the beginning of the snow zone, where plant cover drops below 20%. The treeline is the imaginary line linking the highest elevations where trees at least 3m tall are found in distinct patches. The subalpine zone extends from the timb ...
The Southwest Australia Ecoregion - WWF
... over relatively short distances. Across climate gradations and mosaics of soil types, plant species richness and levels of endemism are high. Within the Southwest Botanical Province, 7,380 plant taxa (6,759 species) have been identified. Almost half (3,620 species) are endemic to the Province, with ...
... over relatively short distances. Across climate gradations and mosaics of soil types, plant species richness and levels of endemism are high. Within the Southwest Botanical Province, 7,380 plant taxa (6,759 species) have been identified. Almost half (3,620 species) are endemic to the Province, with ...
from pik-potsdam.de - Potsdam Institute for Climate Impact
... Grabherr et al. (1994) published the first evidences of ongoing upward migration of alpine plant species in the Alps, including late successional species such as Carex curvula (Grabherr et al., 2001). The colonization over the last 60 years of the subalpine-alpine ecocline (i.e., the gradual change ...
... Grabherr et al. (1994) published the first evidences of ongoing upward migration of alpine plant species in the Alps, including late successional species such as Carex curvula (Grabherr et al., 2001). The colonization over the last 60 years of the subalpine-alpine ecocline (i.e., the gradual change ...
Response of macroarthropod assemblages to the loss
... of arthropod assemblages following loss of hemlock. We examined the importance of the regional species pool only for the ants because we have a reliable regional species pool only for that group (Ellison and Record 2009); we do not have quantitative data on a regional species pool or even a regional ...
... of arthropod assemblages following loss of hemlock. We examined the importance of the regional species pool only for the ants because we have a reliable regional species pool only for that group (Ellison and Record 2009); we do not have quantitative data on a regional species pool or even a regional ...
IMA - Ministry of Forests, Lands and Natural Resource Operations
... and has the harshest climate of any of the biogeoclimatic zones in British Columbia. Temperatures are cold for most of the year, with much wind and snow. Temperatures remain low even during the growing season, which has an exceptionally short frost-free period. Mean annual temperatures range from 0° ...
... and has the harshest climate of any of the biogeoclimatic zones in British Columbia. Temperatures are cold for most of the year, with much wind and snow. Temperatures remain low even during the growing season, which has an exceptionally short frost-free period. Mean annual temperatures range from 0° ...
Response of macroarthropod assemblages to the loss
... of arthropod assemblages following loss of hemlock. We examined the importance of the regional species pool only for the ants because we have a reliable regional species pool only for that group (Ellison and Record 2009); we do not have quantitative data on a regional species pool or even a regional ...
... of arthropod assemblages following loss of hemlock. We examined the importance of the regional species pool only for the ants because we have a reliable regional species pool only for that group (Ellison and Record 2009); we do not have quantitative data on a regional species pool or even a regional ...
neotropical migrant birds and edge effects at a forest
... pasture to the east. Human-made corridors bordering the core area included a 6.1-m-wide county road to the north, with about a 3-m unmowed, grass strip on either side; a 5.2-mwide access road to the reservoir of the City of Frostburg to the west; and a 9.8-m-wide waterline/powerline corridor to the ...
... pasture to the east. Human-made corridors bordering the core area included a 6.1-m-wide county road to the north, with about a 3-m unmowed, grass strip on either side; a 5.2-mwide access road to the reservoir of the City of Frostburg to the west; and a 9.8-m-wide waterline/powerline corridor to the ...
Yukon Coastal Plain Ecoregion
... Babbage and Firth rivers. The lower parts of these fans, as well as the floodplains of most streams in the area, are unvegetated and have shifting channels. The easternmost boundary of the ecoregion includes a portion of the Mackenzie Delta. These deposits are fine-grained, organic and ice-rich, excep ...
... Babbage and Firth rivers. The lower parts of these fans, as well as the floodplains of most streams in the area, are unvegetated and have shifting channels. The easternmost boundary of the ecoregion includes a portion of the Mackenzie Delta. These deposits are fine-grained, organic and ice-rich, excep ...
Chapter 10 - Government of New Brunswick
... protected sites along ecoregion borders. The most common hardwoods are white birch, mountain ash, red maple, and some yellow birch. In the eastern part of the region, red maple and birches typically appear with balsam fir and red spruce, whereas in the western area, red maple and yellow birch occur ...
... protected sites along ecoregion borders. The most common hardwoods are white birch, mountain ash, red maple, and some yellow birch. In the eastern part of the region, red maple and birches typically appear with balsam fir and red spruce, whereas in the western area, red maple and yellow birch occur ...
The Origin and Dynamics of Subalpine White Spruce and Balsam Fir
... The average annual temperature is 1.7C, with July and January average temperature being 16.4 and -13.9C, respectively. The average total precipitation is 1,120 mm with 48% falling as snow. The growing season above 0C is 165 days. The Bonnard weather station (5043¢N, 7103¢W, 506.0 m a.s.l.) is l ...
... The average annual temperature is 1.7C, with July and January average temperature being 16.4 and -13.9C, respectively. The average total precipitation is 1,120 mm with 48% falling as snow. The growing season above 0C is 165 days. The Bonnard weather station (5043¢N, 7103¢W, 506.0 m a.s.l.) is l ...
HWA and its Threat - Tree
... No native predators = major threat to the Eastern hemlock (Tsuga canadensis) & Carolina hemlock (Tsuga caroliniana) The pest has now been established from GA to MA, causing widespread mortality of hemlock trees. 50% of the geographic range of eastern hemlock has been impacted by HWA. ...
... No native predators = major threat to the Eastern hemlock (Tsuga canadensis) & Carolina hemlock (Tsuga caroliniana) The pest has now been established from GA to MA, causing widespread mortality of hemlock trees. 50% of the geographic range of eastern hemlock has been impacted by HWA. ...
Alpine Biodiversity in Europe: an Introduction
... and species abundance on nival mountain summits and in snowbeds in the Alps and the Scandes. As the time-scale of these observations has been coincident with an increase in annual air temperatures, the changes in flora and vegetation have largely been attributed to climatic amelioration. ...
... and species abundance on nival mountain summits and in snowbeds in the Alps and the Scandes. As the time-scale of these observations has been coincident with an increase in annual air temperatures, the changes in flora and vegetation have largely been attributed to climatic amelioration. ...
Taiga - FOSSweb
... slower-growing pines. As the aspens age and begin to die, the pines take over as the dominate tree. This cycle is called forest succession. ...
... slower-growing pines. As the aspens age and begin to die, the pines take over as the dominate tree. This cycle is called forest succession. ...
Taiga - FOSSweb
... live there. Humans kills predators that threaten livestock. We build roads and power lines, and explore for minerals. The natural succession of the forest is disrupted when forest fires are suppressed to protect human dwellings. Many of the taigas of the world are what is called old growth forests. ...
... live there. Humans kills predators that threaten livestock. We build roads and power lines, and explore for minerals. The natural succession of the forest is disrupted when forest fires are suppressed to protect human dwellings. Many of the taigas of the world are what is called old growth forests. ...
RNAs of Clearwater and Nez Perce National Forests:Layout 1
... O’Hara Creek RNA is reached from Highway 12 by traveling south along the Selway River. It encompasses most of an entire drainage system that covers 7,000 acres with elevations ranging from 2,100 feet at the northern boundary to 6,815 feet atop Iron Mountain. The RNA is characterized by steep mountai ...
... O’Hara Creek RNA is reached from Highway 12 by traveling south along the Selway River. It encompasses most of an entire drainage system that covers 7,000 acres with elevations ranging from 2,100 feet at the northern boundary to 6,815 feet atop Iron Mountain. The RNA is characterized by steep mountai ...
Nitrogen Fixer leaf litter loses mass faster than non
... species, but did lose more mass in the 4 month study period. Other factors, then, must be considered. The Alder is a native species, so home field advantage would be similar between it and the Doug fir. However, the study area was in an old growth plot at HJA where Douglas fir was present but no Ald ...
... species, but did lose more mass in the 4 month study period. Other factors, then, must be considered. The Alder is a native species, so home field advantage would be similar between it and the Doug fir. However, the study area was in an old growth plot at HJA where Douglas fir was present but no Ald ...
Ecology of the North Cascades
The Ecology of the North Cascades is heavily influenced by the high elevation and rain shadow effects of the mountain range. The North Cascades is a section of the Cascade Range from the South Fork of the Snoqualmie River in Washington, United States, to the confluence of the Thompson and Fraser Rivers in British Columbia, Canada, where the range is officially called the Cascade Mountains but is usually referred to as the Canadian Cascades. The North Cascades ecoregion is a Level III ecoregion in the Commission for Environmental Cooperation's classification system.The terrain of the North Cascades is composed of high, rugged mountains. It contains the greatest concentration of active alpine glaciers in the conterminous United States and has a variety of climatic zones. A dry continental climate occurs in the east and mild, maritime, rainforest conditions are found in the west. It is underlain by sedimentary and metamorphic rock in contrast to the adjoining Cascades which are composed of volcanics.The North Cascades has a diversity of plant and animal species. It contains more than 1630 vascular plant species. The range has a number of top predators, including bald eagles, wolves, grizzly bears, mountain lions and black bears. The range is home to at least 75 species of mammals and 200 species of birds that either pass through or use the North Cascades for a breeding area. There are also 11 species of fish on the west side of the Cascades. Examples of amphibian species occurring in the North Cascades include the western toad (Bufo boreas) and the rough-skinned newt (Taricha granulosa).The ecology of the area can be understood by following a west-to-east line at the southern end of the North Cascades, at approximately 47.5 degrees north. As the line passes through the Cascade range, it passes through a number of ecoregions, first getting higher and colder, then getting warmer, yet drier. Each of these component ecoregions can be described by either a tree indicator species, or by a lack of trees: Western Hemlock, Pacific Silver Fir, Subalpine Mountain Hemlock, Alpine, Subalpine Fir, and Grand Fir/Douglas-fir.