effects of shade and competing vegetation on growth of western red cedar pdf

Effects of shade and competing vegetation on growth of western red cedar pdf

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Natural conifer regeneration patterns in temperate forests across the Inland Northwest, USA

Effects of Shade and Competing Vegetation on Growth of Western Redcedar Regeneration

Associated Data

David L. Adams, Ronald L. Naturally regenerated western redcedar Thuja plicata is almost always subordinate to associated species that grow more rapidly.

Natural conifer regeneration patterns in temperate forests across the Inland Northwest, USA

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Natural regeneration patterns of conifer species were studied. Seedling regeneration follows patterns responding to stand structure and site condition factors along shade and drought tolerance gradients. Our findings can assist in adaptive forest management for maintaining sustainable regeneration and plant biodiversity. Seedling regeneration can vary with stand factors of overstory trees and understory non-tree vegetation and site conditions. Zero-inflated negative binomial models were developed to understand the responses of natural regeneration to stand factors and site conditions.

The expansion of woody plants into grasslands and old fields is often ascribed to fire suppression and heavy grazing, especially by domestic livestock. However, it is also recognized that nutrient availability and interspecific competition with grasses and other woody plants play a role in certain habitats. I examined potential factors causing range- and niche expansion by the eastern redcedar Juniperus virginiana , the most widespread conifer in the eastern United States, in multifactorial experiments in a greenhouse. Historical records suggest that the eastern redcedar is a pioneer forest species, and may be replaced as the forest increases in tree density due to shading. Another possible factor that affects its distribution may be nutrient availability, which is higher in old fields and other disturbed lands than in undisturbed habitats. However, the higher abundance on limestone could be due to reduced interspecific competition rather than a preference for high pH substrates.

Effects of Shade and Competing Vegetation on Growth of Western Redcedar Regeneration

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By Gary Wade, Ph. Our native landscape is the inspiration for this guide to native plants for Georgia gardens. We would like to acknowledge the following University of Georgia faculty who wrote the original manuscript for this publication: Mel Garber, E. Neal Weatherly Jr. We also extend sincere appreciation to the following individuals who provided images of the plants described in this publication. Any use of these images beyond this publication is discouraged and will require permission from the photographers. We also express appreciation to the Georgia Native Plant Society for providing funds for technical support.

Keywords: Canopy gaps size, gap-based silviculture, gap regeneration, sapling growth. Download as PDF. The study was undertaken in Scots pine shelterwood forests in central Anatolia at the edge of the Eurasian distribution of Scots pine and thus adding significance in terms of understanding the ecology of this important species. Canopy gap size and the position of the sapling within the regeneration cores were chosen within nine different strip-sample plots comprising 20 sapling regeneration cores. Those sapling regeneration cores under the gaps were divided into two portions individuals at the edge and middle of the regeneration cores and from each portion three individuals were selected.


western redcedar (Thuja plicata) is almost Complete removal of competing shade did not significantly impact height growth. The vegetation treatment results.


Associated Data

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Shade is the most important factor limiting growth of a woody range expander

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ВСЯ ХИТРОСТЬ В МЕНЯЮЩЕЙСЯ ПОСЛЕДОВАТЕЛЬНОСТИ.

4 comments

  • Augusta U. 27.04.2021 at 10:28

    For most of the characteristics assessed there was no significant interaction between species and shade indicating that the morphological responses to changing shade treatments were not species-dependent.

    Reply
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  • Adrien A. 03.05.2021 at 11:04

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  • Melvin B. 05.05.2021 at 13:02

    Abstract. Naturally regenerated western redcedar (Thuja plicata) is almost always subordinate to associated species that grow more rapidly.

    Reply

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