Vegetation in North America Series: Abstract of Biomes Dominated
... and into interior Alaska. The biome is also referred to as the boreal forest or taiga. Compared to the arctic tundra, the climate of the boreal forest is characterized by a longer and warmer growing season. Precipitation averages 20 inches per year, but ranges from 40 inches in the eastern regions t ...
... and into interior Alaska. The biome is also referred to as the boreal forest or taiga. Compared to the arctic tundra, the climate of the boreal forest is characterized by a longer and warmer growing season. Precipitation averages 20 inches per year, but ranges from 40 inches in the eastern regions t ...
Recruitment Processes and Species Coexistence
... The regeneration niche was proposed by Grubb (1977) as a key factor for species coexistence. The concept of regeneration niche is related to the idea of ‘ safe site ’ for individual plants in terms of spatial variation. In herbaceous species, Harper, Williams and Sagar (1965), Hartgerink and Bazzaz ...
... The regeneration niche was proposed by Grubb (1977) as a key factor for species coexistence. The concept of regeneration niche is related to the idea of ‘ safe site ’ for individual plants in terms of spatial variation. In herbaceous species, Harper, Williams and Sagar (1965), Hartgerink and Bazzaz ...
Moorlands - plant succession
... over time - from the pioneer stage then the building stage and finally a mature climatic climax • Climatic climax - vegetation is relatively stable • Self sustaining - inputs of energy and nutrients balanced by outputs of energy and nutrients ...
... over time - from the pioneer stage then the building stage and finally a mature climatic climax • Climatic climax - vegetation is relatively stable • Self sustaining - inputs of energy and nutrients balanced by outputs of energy and nutrients ...
Sustainable rangeland management: how grazing management and
... Institutes of Plant Production and Agroecology in the Tropics and Subtropics University of Hohenheim, Germany, E-mail: [email protected] Abstract Semi-arid savanna rangelands are currently under threat by overgrazing, which, in the absence of fire, can lead to dense woody cover and often result ...
... Institutes of Plant Production and Agroecology in the Tropics and Subtropics University of Hohenheim, Germany, E-mail: [email protected] Abstract Semi-arid savanna rangelands are currently under threat by overgrazing, which, in the absence of fire, can lead to dense woody cover and often result ...
Spatially extensive reconstructions show variableseverity fire and
... Historical information and reconstructions of forest structure and fire severity are typically available for few locations, which are often of limited spatial extent and uneven coverage (Morgan et al., 2001); for example, they are common in Arizona (Abella & Denton, 2009) but rare in Oregon. Even wi ...
... Historical information and reconstructions of forest structure and fire severity are typically available for few locations, which are often of limited spatial extent and uneven coverage (Morgan et al., 2001); for example, they are common in Arizona (Abella & Denton, 2009) but rare in Oregon. Even wi ...
Ecosystem Changes, Biodiversity Loss and Human Well
... (e.g., carbon emissions that cause global warming), but they all lead to biodiversity loss and consequently threaten ecosystems balance and human well-being. Human well-being is an inclusive concept that embraces not only the physical and mental components of human health but also social well-being ...
... (e.g., carbon emissions that cause global warming), but they all lead to biodiversity loss and consequently threaten ecosystems balance and human well-being. Human well-being is an inclusive concept that embraces not only the physical and mental components of human health but also social well-being ...
State of the Forest Symposium
... of earthworms in many areas with suitable habitat indicates there is opportunity for the invasion of new forest habitats (Groffman and Bohlen, 1999). We have anecdotal evidence that suggests exotic earthworms are increasing their distribution from urban and suburban areas to rural areas in the mid-A ...
... of earthworms in many areas with suitable habitat indicates there is opportunity for the invasion of new forest habitats (Groffman and Bohlen, 1999). We have anecdotal evidence that suggests exotic earthworms are increasing their distribution from urban and suburban areas to rural areas in the mid-A ...
global carbon cycle - Globe Carbon Cycle
... all organisms do, including microscopic organisms living in soil. When dead organic matter is broken down or decomposed (consumed by bacteria and fungi), CO2 is released into the atmosphere at an average rate of about 60 PgC/year globally. Because it can take years for a plant to decompose (or decad ...
... all organisms do, including microscopic organisms living in soil. When dead organic matter is broken down or decomposed (consumed by bacteria and fungi), CO2 is released into the atmosphere at an average rate of about 60 PgC/year globally. Because it can take years for a plant to decompose (or decad ...
Plan B 3.0: Mobilizing to Save Civilization
... • Used oil-drilling technology to tap a nonreplenishable aquifer to irrigate the desert • In early 2008, announced the aquifer was largely depleted and wheat production would be phased out entirely by 2016 • Will be importing nearly all the grain needed to feed its 30 million people Saudi Arabia is ...
... • Used oil-drilling technology to tap a nonreplenishable aquifer to irrigate the desert • In early 2008, announced the aquifer was largely depleted and wheat production would be phased out entirely by 2016 • Will be importing nearly all the grain needed to feed its 30 million people Saudi Arabia is ...
Plan B 4.0 - Earth Policy Institute
... • Used oil-drilling technology to tap a nonreplenishable aquifer to irrigate the desert • In early 2008, announced the aquifer was largely depleted and wheat production would be phased out entirely by 2016 • Will be importing nearly all the grain needed to feed its 30 million people Saudi Arabia is ...
... • Used oil-drilling technology to tap a nonreplenishable aquifer to irrigate the desert • In early 2008, announced the aquifer was largely depleted and wheat production would be phased out entirely by 2016 • Will be importing nearly all the grain needed to feed its 30 million people Saudi Arabia is ...
Contributions of C3 and C4 plants to higher trophic levels in an
... grasses and sedges, and dicotyledonous shrubs and trees, which have distinct functional roles in the ecosystem (Boutton et al. 1983). The frequency of ®re alters the proportions of grassy and woody vegetation in welldrained areas, trees and shrubs increasing in areas protected from ®re (e.g. San Jos ...
... grasses and sedges, and dicotyledonous shrubs and trees, which have distinct functional roles in the ecosystem (Boutton et al. 1983). The frequency of ®re alters the proportions of grassy and woody vegetation in welldrained areas, trees and shrubs increasing in areas protected from ®re (e.g. San Jos ...
Contributions of C3 and C4 plants to higher trophic - PPBio
... grasses and sedges, and dicotyledonous shrubs and trees, which have distinct functional roles in the ecosystem (Boutton et al. 1983). The frequency of ®re alters the proportions of grassy and woody vegetation in welldrained areas, trees and shrubs increasing in areas protected from ®re (e.g. San Jos ...
... grasses and sedges, and dicotyledonous shrubs and trees, which have distinct functional roles in the ecosystem (Boutton et al. 1983). The frequency of ®re alters the proportions of grassy and woody vegetation in welldrained areas, trees and shrubs increasing in areas protected from ®re (e.g. San Jos ...
Principles of Dendrochronology
... This principle states that physical and biological processes that link current environmental processes with current patterns of tree growth must have been in operation in the past. In other words, "the present is the key to the past," originally stated by James Hutton in 1785. However, dendrochronol ...
... This principle states that physical and biological processes that link current environmental processes with current patterns of tree growth must have been in operation in the past. In other words, "the present is the key to the past," originally stated by James Hutton in 1785. However, dendrochronol ...
研究事例 - CBD
... fed to cattle and horses or utilized as compost. Thus, functional links were maintained between forests and other components of the landscape, including rice paddies and crop fields. As forest density was regulated by human management activities, a certain amount of sunlight was allowed to reach the ...
... fed to cattle and horses or utilized as compost. Thus, functional links were maintained between forests and other components of the landscape, including rice paddies and crop fields. As forest density was regulated by human management activities, a certain amount of sunlight was allowed to reach the ...
Lowland Grassy Woodland in the South East Corner Bioregion
... sites yellow box (Eucalyptus melliodora) and snow gum (E. pauciflora) may be locally common. Coast grey box (E. bosistoana), blue box (E. baueriana) and maiden’s blue gum (E. maidenii) may also occur less frequently and ribbon or manna gum (E. viminalis) may occur on lower slopes adjacent to major s ...
... sites yellow box (Eucalyptus melliodora) and snow gum (E. pauciflora) may be locally common. Coast grey box (E. bosistoana), blue box (E. baueriana) and maiden’s blue gum (E. maidenii) may also occur less frequently and ribbon or manna gum (E. viminalis) may occur on lower slopes adjacent to major s ...
English - Summit of the Americas
... Consider hydro in light of global benefits of emission reductions Make use of increased experience and better tools to avoid negative environmental and social impacts: e.g., strategic impact assessments Intensify efforts to exploit other sources of renewable energy (e.g. wind) Continue to take advan ...
... Consider hydro in light of global benefits of emission reductions Make use of increased experience and better tools to avoid negative environmental and social impacts: e.g., strategic impact assessments Intensify efforts to exploit other sources of renewable energy (e.g. wind) Continue to take advan ...
Geoengineering - Alachua County
... Afforestation: involves planting tree seedlings on sites that have been without trees for several years, generally a decade or more. (Land use change?) Ocean fertilization: The addition of nutrients such as iron to the ocean to expedite carbon sequestration from phytoplankton. Biomass: In addition t ...
... Afforestation: involves planting tree seedlings on sites that have been without trees for several years, generally a decade or more. (Land use change?) Ocean fertilization: The addition of nutrients such as iron to the ocean to expedite carbon sequestration from phytoplankton. Biomass: In addition t ...
Hammock Homes for Hangouts
... Fifteen species of vertebrates are native to South Florida rocklands and many of these utilize tropical hardwood hammocks as habitat. Ten of these are mammals and five are reptiles. Some mammal species have evolved regional sub-species such as the Florida Key deer, a small relative of the white-tail ...
... Fifteen species of vertebrates are native to South Florida rocklands and many of these utilize tropical hardwood hammocks as habitat. Ten of these are mammals and five are reptiles. Some mammal species have evolved regional sub-species such as the Florida Key deer, a small relative of the white-tail ...
Vochysia guatemalensis Donn. Sm.
... pollinate some of the flowers. Many young fruits are eaten by birds and mammals, substantially reducing seed production. Propagation by pseudografting twigs and naked root seedlings has not been successful (Flores 1993b). However, research continues and Corea (1994) believes using juvenile succulent ...
... pollinate some of the flowers. Many young fruits are eaten by birds and mammals, substantially reducing seed production. Propagation by pseudografting twigs and naked root seedlings has not been successful (Flores 1993b). However, research continues and Corea (1994) believes using juvenile succulent ...
Spicers Peak Nature Refuge - Eco Guide
... head and body. From before dawn into the early morning and from late afternoon into the early night, it feeds on native grasses, also eating some herbs and ferns. For the remaining part of the day and night it sleeps in the shelter of a shrub or low tree. It is gregarious, moving in groups of up to ...
... head and body. From before dawn into the early morning and from late afternoon into the early night, it feeds on native grasses, also eating some herbs and ferns. For the remaining part of the day and night it sleeps in the shelter of a shrub or low tree. It is gregarious, moving in groups of up to ...
California Status Factors
... Total estimated number of occurrences in CA is <20. The fungus is a western North American endemic that is only sporadically collected throughout its range. There is only one protected forest site, but other localities may be protected as part of the Northwest Forest Plan. More occurrences may be ve ...
... Total estimated number of occurrences in CA is <20. The fungus is a western North American endemic that is only sporadically collected throughout its range. There is only one protected forest site, but other localities may be protected as part of the Northwest Forest Plan. More occurrences may be ve ...
Forest Population Ecology
... • Importance to ecology & management of forests • “Managers of renewable resources must be mindful of the wide variety of interrelationships between organisms of the same and of different types… Such relationships … are of key importance in determining the success of forest resource management.” (Ki ...
... • Importance to ecology & management of forests • “Managers of renewable resources must be mindful of the wide variety of interrelationships between organisms of the same and of different types… Such relationships … are of key importance in determining the success of forest resource management.” (Ki ...
Alberta Carbon Tax – Literature Review
... producing the concrete for wind-turbine foundations” (“The ecological,” 2013). Furthermore, oil and gas have been a contributing factor to global warming. “Scientists have concluded that most of the observed warming is very likely due to the burning of coal, oil, and gas” (“Global Warming,” n.d.). A ...
... producing the concrete for wind-turbine foundations” (“The ecological,” 2013). Furthermore, oil and gas have been a contributing factor to global warming. “Scientists have concluded that most of the observed warming is very likely due to the burning of coal, oil, and gas” (“Global Warming,” n.d.). A ...
Watershed - cloudfront.net
... Developed, Open Space - areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. Impervious surfaces account for less than 20% of total cover. These areas most commonly include large-lot single-family housing units, parks, golf courses, and vegetation pl ...
... Developed, Open Space - areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. Impervious surfaces account for less than 20% of total cover. These areas most commonly include large-lot single-family housing units, parks, golf courses, and vegetation pl ...
The Worms are Coming!
... things so any decent sized worm, e.g. redworm or nightcrawler is an invasive. It’s amazing to think how recently they’ve come to North America ... how relatively slowly they move through soil and yet how widespread they are. Pretty much all the human-inhabited parts of North America now have nonnati ...
... things so any decent sized worm, e.g. redworm or nightcrawler is an invasive. It’s amazing to think how recently they’ve come to North America ... how relatively slowly they move through soil and yet how widespread they are. Pretty much all the human-inhabited parts of North America now have nonnati ...
Reforestation
Reforestation is the natural or intentional restocking of existing forests and woodlands that have been depleted, usually through deforestation.Reforestation can be used to improve the quality of human life by soaking up pollution and dust from the air, rebuild natural habitats and ecosystems, mitigate global warming since forests facilitate biosequestration of atmospheric carbon dioxide, and harvest for resources, particularly timber.The term reforestation is similar to afforestation, the process of restoring and recreating areas of woodlands or forests that may have existed long ago but were deforested or otherwise removed at some point in the past. Sometimes the term re-afforestation is used to distinguish between the original forest cover and the later re-growth of forest to an area. Special tools, e.g. tree planting bar, are used to make planting of trees easier and faster.