CATALANO, Chiara, Corrado MARCENÓ, Vito Armando LAUDICINA and Riccardo GUARINO. Thirty years unmanaged green roofs: Ecological research and design implications. Landscape and Urban Planning. Elsevier, vol. 149, May, p. 11-19. ISSN 0169-2046. doi:10.1016/j.landurbplan.2016.01.003. 2016.
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Basic information
Original name Thirty years unmanaged green roofs: Ecological research and design implications
Authors CATALANO, Chiara (380 Italy), Corrado MARCENÓ (380 Italy, guarantor, belonging to the institution), Vito Armando LAUDICINA (380 Italy) and Riccardo GUARINO (380 Italy).
Edition Landscape and Urban Planning, Elsevier, 2016, 0169-2046.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10600 1.6 Biological sciences
Country of publisher Netherlands
Confidentiality degree is not subject to a state or trade secret
Impact factor Impact factor: 4.563
RIV identification code RIV/00216224:14310/16:00089351
Organization unit Faculty of Science
Doi http://dx.doi.org/10.1016/j.landurbplan.2016.01.003
UT WoS 000389866700002
Keywords in English Simple-intensive green roofs; Temperate ecosystems; Long term dynamics; Functional traits; Urban biodiversity; Descriptors
Tags AKR, rivok
Tags International impact, Reviewed
Changed by Changed by: Ing. Andrea Mikešková, učo 137293. Changed: 14/4/2017 15:50.
Abstract
The variations in species composition and assemblage of unmanaged simple-intensive green roofs in Hannover, Germany, were investigated over a thirty year period, in order to assess the persistence of the initial seed mixture and to evaluate floristic changes. The roofs were greened in 1985 with soilbased turf rolls sown with a mixture of five grasses (Festuca rubra, Festuca ovina, Agrostis capillaris, Lolium perenne and Poa pratensis). Three sets of 120 phytosociological relevés, sampled in 1987, 1999 and 2014, have been compared to assess: (1) nestedness vs spatial turnover, (2) functional diversity and (3) the importance of vegetation dynamics on green roof performance and design. Results demonstrated that from 1987 to 1999 the species diversity increased and the species turnover prevailed over nestedness, due to the progressive niche occupation by new species. In contrast, from 1999 to 2014 species diversity remained steady, suggesting that nestedness prevailed over species turnover. The main driver of the observed functional changes was a shift towards relatively more thermoxeric conditions. In terms of plant life strategies, the competitive species sown on the roof gradually gave way to stress-tolerant and ruderal species, along with a progressive increase in species with shortdistance seed dispersal strategies. It is concluded that: (a) to create resilient green roofs, spontaneous colonisation should be accepted and considered as a design factor; and (b) regional plant communities could serve as a model for seed recruitment and installations.
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