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Vegetation development on extensive vegetated green roofs

Influence of substrate composition, establishment method and species mix

Emilsson, Tobias (2008). Vegetation development on extensive vegetated green roofs. Ecological engineering. 33 :3-4 , 265-277
[Research article]

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Official URL: http://dx.doi.org/10.1016/j.ecoleng.2008.05.005


Technology for establishment of vegetated roofs (green roofs) has developed rapidly over recent years but knowledge about how these systems will develop over time is still limited. This study investigates vegetation development on unfertilised thin extensive vegetated roofs during a 3-year period. The vegetation systems investigated were designed to be low maintenance and had a saturated weight of 50 kg/m2, a thickness of 4 cm and drought-resistant succulent and bryophyte vegetation. Vegetation development was investigated in relation to: establishment method, species mixture and substrate composition in a factorial experiment. Vegetation cover was investigated using point intercept. Moss was found to develop on most substrates and reached more than 80% cover on some plots. Sedum album and Sedum acre were the dominant species on the roofs. S. acre was found to decrease drastically after 2 years. The lack of difference found in this study between the establishment techniques shows that there are other possible marketable ways to construct vegetated roofs in Sweden, as an alternative to vegetation mats. Uniform extensive vegetated roofs with a high dominance of succulent species have limited value for plant biodiversity, as few species establish spontaneously.

Authors/Creators:Emilsson, Tobias
Title:Vegetation development on extensive vegetated green roofs
Subtitle:Influence of substrate composition, establishment method and species mix
Series Name/Journal:Ecological engineering
Year of publishing :July 2008
Page range:265-277
Publication Type:Research article
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Landscape planning > Planting design
Keywords:Green roof, Sedum, Succession
Permanent URL:
ID Code:4557
Department:(LTJ, LTV) > Landscape Management, Design, and Construction (until 121231)
Deposited By: Tobias Emilsson
Deposited On:12 Mar 2010 00:00
Metadata Last Modified:02 Dec 2014 10:31

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