Format:
iv, 32 Seiten
,
Illustrationen
Series Statement:
CRREL Report 76-15
Content:
A literature review of revegetation and biological aspects of restoration research was completed for arctic and subarctic North America. Although there is a great deal of climatic variation in this region it is generally characterized by extreme conditions, such as a short growing season and permafrost. Most of the revegetation research has been undertaken in the last six years as a result of increased natural resource development. The primary goal has been erosion control, with aesthetics, minimization of thermokarst, and production of browse as other objectives. Revegetation and long-term restoration methods depend upon such variables as the site conditions, nutrient regime (especially as this is influenced by the climatic conditions in the Arctic and Subarctic), plant adaptations, and the selection of native or introduced species. Technologies which have been developed to meet these conditions primarily include seedbed preparation, use of seed mixes, and fertilization and seeding methods. Most of the research has focused on the use of agronomic grasses and legumes. These are selected on the basis of a number of factors, such as cold hardiness and growth form prior to evaluation in the laboratory and the field. The most successful species to date have been Arctared fescue and Nugget bluegrass in the Arctic, while these two as well as creeping red fescue, meadow foxtail, Frontier reed canarygrass, Durar hard fescue, slender wheatgrass, and Icelandic poa did well in the Subarctic. Similar methods have been attempted to a more limited extent with evaluation of native herbaceous and woody species which seem promising on the basis of natural succession studies. There are a number of continuing research needs for arctic anc subarctic revegetation. These include fertilization strategies, development of specialized techniques (such as sprigging) for native species, and longer term studies. It is particularly important to integrate short term revegetatio methods with long-term restoration goals.
Note:
MAB0014.001: ZSP-201-76/15
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CONTENTS
Page
Abstract
Preface
Introduction
Definition of revegetation
Definition of restoration
Objectives
Some revegetation considerations
Site conditions
Nutrient regime
Plant adaptations
Native species vs introduced species
Methods
Seedbed preparation
Seeding methods
Timing of seeding
Seed mixes
Fertilization
Agronomic grasses and legumes
Selection criteria
Laboratory evaluation
Field evaluation
Effect of revegetation methods
Site conditions
Maintenance of herbaceous cover
Introduced woody species
Native species — succession
Significance of disturbance
Primary succession
Secondary succession
Herbaceous native species
Selection
Laboratory evaluation
Field evaluation
Effect of revegetation methods
Woody native species
Selection
Laboratory evaluation
Field evaluation
Native species and agronomic species, in combination
Recommendations for research
Summary
Bibliography
Appendix: Species tested
In:
CRREL Report, 76-15
Language:
English
Keywords:
Forschungsbericht
URL:
https://cdm16021.contentdm.oclc.org/digital/collection/p266001coll1/id/6160
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