Population dynamics of three early seral herb species in Pacific Northwest forests

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Epilobium angustifolium -- Dispersal -- Northwest, Pacific., Purple foxglove -- Dispersal -- Northwest, Pacific., Senecio -- Dispersal -- Northwest, Pac
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Description Population dynamics of three early seral herb species in Pacific Northwest forests PDF

Population dynamics of three early seral herb species in Pacific Northwest forests Public Deposited. and extirpation in Pacific Northwest Douglas-fir forests.

Factors affecting the species' frequency and abundance in forest communities were evaluated. Competition and fertilization had little effect on this species and population Cited by: 2.

Population dynamics of three early seral herb species in Pacific Northwest forests. Abstract. Graduation date: I investigated the population dynamics of fireweed (Epilobium angustfolium), foxglove (Digitalis purpurea), and woodland groundsel (Senecio sylvaticus) to understand\ud their colonization, persistence, and extirpation in.

Early seral forest is attracting increasing attention from scientists and managers. Population dynamics of three early seral herb species in Pacific Northwest forests book This literature review, produced under contract to the United States Forest Service, addresses basic questions about this important seral stage in the forests of the Pacific Northwest File Size: KB.

For Washington, Oregon, and northern California, we also review the state lists of endangered, threatened, monitored or otherwise conservation-listed species ( unique species or subspecies for the combined region) to assess the proportion of protected species that rely on the structural attributes of early-seral by:   Michelle M.

Jackson, Scott M. Pearson and Monica G. Turner, Performance and population dynamics of a native understory herb differ between young and old forest stands in the Southern Appalachians, Forest Ecology and Management,(), ().Cited by:   1.

Introduction. Much of the biodiversity in British Columbia and the Pacific Northwest is associated with early and late-seral forests (Harris,Mackinnon, ).However, abundance of late-seral forests has been greatly reduced throughout this region owing to forest harvesting and other human-induced disturbances.

Toward this end, the following example illustrates the application of SEM in quantifying ecological mechanisms influencing the abundance of late-seral herb species in mature Douglas-fir forests of the Pacific Northwest.

Hypotheses and Processes. In systems with very long‐lived pioneer species (e.g. Douglas‐fir in the Pacific Northwest), an absence of a canopy closure stage may mean that the spatial distribution of large trees in old growth could result as much from patterns of initial tree establishment as.

During early stand development, coniferous forests of the coastal Pacific Northwest commonly pass through a period of dense shade and intense competition during which the abundance and diversity. Linking environmental variation to population dynamics of a forest herb Johan P.

Dahlgren* and Johan Ehrlén Department of Botany, Stockholm University, SE 91 Stockholm, Sweden Summary 1. Although necessary for understanding and predicting population dynamics, abiotic and biotic.

The Northwest Forest Plan (NWFP) was developed to resolve debates over old-growth forests, endangered species, and timber production on federal forests in the range of the northern spotted owl.

Complex early seral forests (CESFs) occupy potentially forested sites after a stand-replacement disturbance and before re-establishment of a closed-forest canopy.

Such young forests contain numbers and kinds of biological legacies missing from those produced by commercial forestry operations. In the Sierra Nevada of California, CESFs are most often produced by mixed-severity fires, which.

We investigated the plant population structure and the phytosociological and regeneration status in two disturbed tropical forests in Assam Province, the Hojai Reserve Forest and Kumorakata Reserve Forest. A total of species (80 trees, 20 shrubs and 66 herbs) of genera and 63 families were recorded in both study sites.

The meadow vole (Microtus pennsylvanicus), sometimes called the field mouse or meadow mouse, is a North American vole found across Canada, Alaska and the northern United range extends farther south along the Atlantic coast.

One subspecies, the Florida salt marsh vole (M. dukecampbelli), is found in Florida, and is classified as endangered. Be an Early Stage or Series A startup.

SPIES is a research forester, USDA Forest Service, Pacific Northwest Research Station, Corvallis, Oregon 8 MB] Chatto, K. Tablet PCs: There are a growing number of tablet PCs for consumers to choose from, as this product passes through the Growth stage of the cycle and more competitors start to.

Reduced burn potential may arise because of slow fuel buildup after fire (Parks et al. b), or a shift from relatively flammable conifers to less flammable deciduous species (e.g., shifts from conifer forests to early seral vegetation dominated by aspen or birch in boreal landscapes; Héon et al.Whitman et al.

Low burn. Centuries of Change in Pacific Northwest Forests: Ecological Effects of Forest Simplification and Fragmentation Octo important shrub and herb species, is also more spatially diverse in old-growth forests due to the protracted period of regeneration of seral pioneers (Franklin et.

The effects of thinning on understory herbs depend on the intensity of the thinning and on the degree of ground disturbance. In young (25–year old) Pseudotsuga menziesii forests in the Pacific Northwest, thinning significantly increases cover of disturbance-responsive release species.

of species, biodiversity, and ecosystem conditions gained from studies conducted since the year synthesis of mon-itoring and research results (Haynes et al. We review agency programs on other species and biodiversity of older forests of the Pacific Northwest, including implementation of the NWFP Survey and Manage standards and guide.

The invasion of non-indigenous plant species poses a severe threat to native plant communities. Garlic mustard (Alliaria petiolata) is a naturalized European biennial herb that has spread rapidly through the eastern US and adjacent Canada.

To determine garlic mustard rate of spread, eleven permanent plots (50×25 m) were located in seven high quality (relatively undisturbed) forests in the.

Context. A puzzling aspect of microtine population fluctuations is the damping out or collapsing of cycles over the last three decades, particularly in northern Europe. Occasional population fluctuations of Microtus may also have been damped out in temperate and boreal forests of the Pacific North-west of North America.

One cause might be the presence of cattle (Bos taurus) grazing in forest. The Setting. The old-growth forests of the Pacific Northwest contain a unique assortment of large, old trees – some dominated by Douglas-firs and western hemlocks, generally to years old – others dominated by Sitka spruce and western hemlock, along the Pacific Coast – and at higher elevations in the Cascade Mountains, true fir and hemlock old-growth forests.

Differences in root systems among species may contribute to compositional changes during succession. We excavated all belowground parts of species in an early successional community yr after logging and burning of an old Pseudotsuga menziesii forest.

Annual species had a similar overall root system morphology, but varied in characteristics such as rooting depth and root/shoot ratio. Impacts Study 1 (diversity/stability): Patterns of population stability in forest herbs over 40 years of succession do not support the theoretical expectation that stability is negatively related to species richness.

Stability was positively related to richness during early succession, but unrelated to richness later,when overall stability was. Equations for predicting above-ground biomass of plant species in early successional forests of the western Cascade Range, Oregon.

Northwest Science Halpern, C. B., and T.

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Spies. Plant species diversity in natural and managed forests of the Pacific Northwest. Forests, being an ecological system, are subject to the species succession process. There are "opportunistic" or "pioneer" species that produce great quantities of seed that are disseminated by the wind, and therefore can colonize big empty extensions.

They are capable of germinating and growing in. tion under the Endangered Species Act and the Clean Water Act (WFPB, a), which regulate all land owners.

The three scenarios considered in the EIS for pri-vate lands in Washington State (WFPB, a) are projected and the extent and distribution of late-seral forest over multiple ownerships are.

Acknowledgements: The authors wish to thank all those who kindly donated their time to this publication. Thanks to Bill Hopkins and Rob Rawlings for blazing the trail with their "Major indicator shrubs and herbs on National Forests in eastern Oregon" (Hopkins and Rawlings, ).

Details Population dynamics of three early seral herb species in Pacific Northwest forests FB2

old-growth forests are totally gone or exist as fragments in highly altered landscapes, the ecological values of old growth are poorly known.

Scientific knowledge of the ecological characteristics of old-growth forests is probably best developed for forests of the Pacific Northwest (Franklin et al. ; Ruggiero et al. ), and scientific. A Pacific Northwest extension publication suggests that sulfur cinquefoil can "spread by roots when Sulfur cinquefoil is often found in association with early seral stages in the Interior Douglas-fir Wilson, Mark V.

Fire and seedling population dynamics in western Oregon prairies. Journal of Vegetation Science. 72 Pacific Northwest Forests Conditions of Eastside forests were reviewed by the Eastside Forests Scientific Pane} (Henjum et al. ), which concluded that approximately 25% of the land on eight national forests in eastern Washington and Oregon was old-growth forest.seral reserves established for spotted owls (Strix occidentalis caurina) could be sufficient for marten conservation.

In addition, we described habitat use, home range size, density, population size, potential prey and diet in forested dunes of the central Oregon coast, west of Highway Early and late-seral forest habitat have become increasingly fragmented, simplified in structure and infringed on or invaded by exotic plants (Hann et al.Hessburg et al.

in press). Primary causes for decline in early and late-seral habitats are intensive timber harvest and .