Large-scale reclamation of barren lands in Iceland by aerial seeding
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Authors: S. Greipsson, and H. El-Mayas
Date: 1999
Journal: Land Degradation & Development
Volume: 10
Number: 3
Pages: 185-193
Summary of Methods: Plant succession was examined on reclaimed sites at zero, two, 10 and 25 years post-reclamation in the barren lands of Haukadalasheidi in Southern Iceland (64˚ 35’ N; 20˚ 28’ W). Reclaimed sites were all aerial seeded and from ranged from 100 to 600 ha in size. Sites were fertilized following a five year schedule with two different fertilizers at two different rates. Vegetative cover and surface objects were measured. Soil samples were collected for measuring arbuscular mycorrhizal fungi (AMF) spores and root colonization of both seeded grasses and native grasses and forbs.
Article Summary / Main Points: The highest percentage of cover from the aerial seeded species was found two years after initial revegetation, but disappeared completely after ten years. Ten years after initial revegetation, native grass species invading from adjacent sites reached their highest percentage of cover, but dropped significantly after 25 years. Moss cover increased significantly after ten years and reached its highest cover after 25 years; humus was found to significantly accumulate after 25 years. AMF spores were found to be nearly absent from all sites, suggesting the lack of AMF may strongly impede primary plant establishment. Collection and application of native AMF spores from surrounding areas is suggested as they are more adapted to the site. To improve soil nutrients, a common major limiting factor in reclamation, including hardy legumes in the seed mixture is recommended.
Vegetation Types: Tundra
MLRA Ecoregions: Not Applicable
Agrovoc Control Words: Reclamation Rangelands Mycorrhizae
Article Review Type: Refereed
Article Type: Experimental Research
Keywords: aerial seeding, arbuscular mycorrhizal fungi, barren lands, iceland, reclamation, revegetation, succession
Annotation: This study offers perspective on plant community succession in reclamation not only aboveground but also, below ground soil interactions. Though this study is not specifically directed at rangelands and associated grazing, it can be used a reference for planning revegetation projects on barren lands and alpine ecosystems.
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