3 edition of Diversity, density, and development of early vegetation in a small clear-cut environment found in the catalog.
Diversity, density, and development of early vegetation in a small clear-cut environment
Philip M. McDonald
|Statement||Philip M. McDonald.|
|Series||Research paper PSW-RP -- 239., Research paper PSW -- 239.|
|Contributions||Pacific Southwest Research Station (Berkeley, Calif.)|
|The Physical Object|
|Pagination||ii, 22 p. :|
|Number of Pages||22|
The development of this fertile soil allowed agriculture and silviculture in the previously hostile environment; meaning that large portions of the Amazon rainforest are probably the result of centuries of human management, rather than naturally occurring as has previously been supposed. Community Structure Any definition of a community is necessarily vague, but the relevant features of a community require that an assemblage of species coexist together in a habitat and they interact. Therefore, a working definition of a community is a collection of plant and animal populations that are interacting directly or indirectly.
The present book constitutes the general part of a monograph on Rocky Mountain vegetation which has been under way since It is hoped that another volume dealing with the details of the development and structure of the climax formation of the Great Plains, Rocky Mountains, and . US EPA-AWBERC LIBRARY United States Environmental Protection Agency and Government of Canada ISBN Copies may be obtained from: Great Lakes National Program Office U.S. Environmental Protection Agency 77 West Jackson Blvd Chicago, Illinois U.S.A. EPA B Public Inquiries Environment Canada, Ontario Region Dufferin Street .
Abstract: The book covers the development, site condition, composition, stucture and use history, flora and vegetation, dynamics and conservation issues of slope steppes, loess steppes and forest steppe meadows of Hungary. There are notes on favourable management as well. Matang Mangrove Forest Reserve (MMFR) in Peninsular Malaysia is under systematic management since and still considered as the best managed mangrove forest in the world. The present study on silvimetrics assessed the ongoing MMFR forest management, which includes a first thinning after 15 years, a second thinning after 20 years and clear-felling of year old forest blocks, for its Cited by:
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Ii In Brief McDonald, Philip M. Diversity, density, and development of early vegetation in a small clear-cut environment. environment. Res. Diversity, density, and development of early vegetation in a small clear-cut environment (OCoLC) Online version: McDonald, Philip M. Diversity, density, and development of early vegetation in a small clear-cut environment (OCoLC) Material Type: Government publication, National government publication: Document Type: Book.
Diversity, density, and development of early vegetation in a small clear-cut environment (OCoLC) Material Type: Document, Government publication, National government publication, Internet resource: Document Type: Internet Resource, Computer File: All Authors / Contributors: Philip M McDonald; Pacific Southwest Research Station.
Density and Development of Bracken Fern (Pteridium aquilinum) in Forest Plantations as Affected by Manual and Chemical Application Article in Native Plants Journal 4(1) March density 25 Reads.
The density and development of greenleaf manzanita, other shrubs, and graminoids were evaluated in a young ponderosa pine plantation on a poor site in northern California from through term patterns of diversity and species occurrence. Permanent-plot studies of early succession in old-growth Pseudotsuga forests suggest that changes in understory diversity are fairly short-lived following clear-cut logging and slash burning.
Populations of most vascular plant species recover to original levels prior to canopy closure. However. The density distribution in Indian coals is characterised by a low proportion or complete lack of low relative density fractions below orwhich is evident from the density distribution curves in Fig.
Lack of density fraction accounts for the lack of low ash fractions. As a consequence, Indian coals, as shown in Fig.
are incapable of producing clean coal at low ash levels. Relative density was used to conduct the CCA analysis of seedling and sapling vegetation and importance value was used to conduct the analysis of overstory vegetation. CCA is a constrained ordination technique that achieves an optimal solution by arranging sites and species in a multidimensional space, with the restriction that the ordination Cited by: Clear cut Pros: low costs, simple, always with machines, easy soil preparation and regeneration Cons: requires using pioneer species, changed microclimate, loss of soil nutrients (esp K and nitrate), competing ground vegetation, mice habitat, aesthetics.
The active effect of natural regeneration on understory vegetation and diversity on clear-cut forestlands, in contrast to conifer reforestation, is still controversial.
Here we investigated differences in understory vegetation by comparing naturally regenerated deciduous forests (NR) and reforested spruce plantations (SP) aged 20–40 years on 12 similar clear-cuts of subalpine old-growth Cited by: 7. Though the theory of density dependence or self-thinning is clear-cut, it has been difficult to find evidence of it in field studies.
If density dependence is at play, it should leave an imprint on tree or shrub spatial distribution, such as a decrease in spatial aggregation with tree size or age (Meyer et al.
; Belay and Moe ).Cited by: The natural environment, commonly referred to simply as the environment, includes all living and non-living things occurring naturally on Earth. The natural environment includes complete ecological units that function as natural systems without massive human intervention, including all vegetation, animals, microorganisms, soil, rocks, atmosphere and natural phenomena that occur within their.
In order to prioritize promoting plant species diversity, clear-cut harvesting and selective harvesting at high and extra-high intensities should be avoided with regard to this type of forest in this region. This study sheds light on the practice of forest operation in the study region and subtropical forests with the same environment.
Full article. (1) Literature review. We searched the literature for studies on disturbance by fire, wind and bark beetles, and their impacts on ecosystem services as defined by the Millennium Ecosystem Assessment (MEA, ), as well as their effects on biodiversity, focusing on species richness and habitat quality as well as on indices of diversity (e.g.
Shannon‐Index, Simpson‐Index, etc.).Cited by: In this report we evaluate (1) existing data regarding the ability of vegetation to act as a nutrient and sediment filter, (2) the effects of stream morphology on water quality, (3) the effects of streamside vegetation on water temperature, and (4) the potential impact of greenbelts (a combina- tion of nearstream vegetation and stream.
Long, James N. Trends in plant species diversity associated with development in a series of Pseudotsuga menziesii/Gaultheria shallon stands. Northwest Science. 51(2):  Long, James N.; Turner, J. Aboveground biomass of understorey and overstorey in an age sequence of four Douglas-fir stands.
Journal of Applied. Urban sprawl or suburban sprawl mainly refers to the unrestricted growth in many urban areas of housing, commercial development, and roads over large expanses of land, with little concern for urban planning. In addition to describing a particular form of urbanization, the term also relates to the social and environmental consequences associated with this development.
Invasive species can be a major threat to native biodiversity and the number of invasive plant species is increasing across the globe. Population genetic studies of invasive species can provide key insights into their invasion history and ensuing evolution, but also for their control.
Here we genetically characterise populations of Impatiens glandulifera, an invasive plant in Europe that can Cited by: Ecological succession is the process of change in the species structure of an ecological community over time.
The time scale can be decades (for example, after a wildfire), or even millions of years after a mass extinction. The community begins with relatively few pioneering plants and animals and develops through increasing complexity until it becomes stable or self-perpetuating as a climax.
In the early development of forest stand, density of trees remain high and there is competition among trees for nutrients. When natural regeneration or artificial seeding has resulted in dense, overstocked young stands, natural thinning will in most cases eventually reduce stocking to more silviculturally desirable levels.
But by the time some. Carabids (Carabidae, Coleoptera) were studied for 2 yearsto explore changes in their diversity and composition during a forestry cycle inthe Hungarian Mountain Range. Native beech forest was clear-cut and replantedwith Norway by: In the Great Basin, these include historical practices such as trapping for the fur trade in the mid to late s, predator-control programs using poison on public lands from the early s to to protect livestock (Feldman ), and poisoning of small mammals to protect crop production (Buffum ) and forage seedings (Plummer et al Cited by: Fike, J.
and Niering, W. A. () Four decades of old field vegetation development and the role of Celastrus orbiculatus in the Northeastern United States. Journal of Vegetation Science, 10, – Cited by: