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Extensive green roofs: Carbon seques...

Getter, Kristin Louise.

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Extensive green roofs: Carbon sequestration potential and species evaluations.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Extensive green roofs: Carbon sequestration potential and species evaluations./
作者:	Getter, Kristin Louise.
面頁冊數:	131 p.
附註:	Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 3845.
Contained By:	Dissertation Abstracts International70-07B.
標題:	Biogeochemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3363889
ISBN:	9781109237474

Extensive green roofs: Carbon sequestration potential and species evaluations.
Getter, Kristin Louise.

Extensive green roofs: Carbon sequestration potential and species evaluations. - 131 p.

Source: Dissertation Abstracts International, Volume: 70-07, Section: B, page: 3845.

Thesis (Ph.D.)--Michigan State University, 2009.

Green roofs, or vegetated roofs, are often adopted for energy savings and can thus mitigate climate change by lowering demand for heating and air conditioning use which results in less carbon dioxide emitted from power plants and furnaces. The goal of this research was to quantify the intrinsic carbon storage potential of extensive green roofs by plants and soils. Plots of four species of Sedum plus a substrate only treatment were established on a roof with a 6.0 cm substrate depth, replicated four times. Carbon analysis was performed by sampling aboveground biomass, below-ground biomass (roots), and substrate carbon content, harvested seven times across two growing seasons. After two growing seasons, above-ground plant material stored an average of 168 g C•m-2 and below-ground biomass stored an average of 107 g C•m-2. Substrate carbon content averaged 913 g C•m-2, sequestering 100 g C•m -2 beyond what was in the initial substrate. The entire extensive green roof system sequestered 375 g C•m-2. There was a species effect on above- and below-ground carbon, but not on substrate carbon.

ISBN: 9781109237474Subjects--Topical Terms:

545717
Biogeochemistry.

Extensive green roofs: Carbon sequestration potential and species evaluations.
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500 $a Adviser: D. Bradley Rowe.
502 $a Thesis (Ph.D.)--Michigan State University, 2009.
520 $a Green roofs, or vegetated roofs, are often adopted for energy savings and can thus mitigate climate change by lowering demand for heating and air conditioning use which results in less carbon dioxide emitted from power plants and furnaces. The goal of this research was to quantify the intrinsic carbon storage potential of extensive green roofs by plants and soils. Plots of four species of Sedum plus a substrate only treatment were established on a roof with a 6.0 cm substrate depth, replicated four times. Carbon analysis was performed by sampling aboveground biomass, below-ground biomass (roots), and substrate carbon content, harvested seven times across two growing seasons. After two growing seasons, above-ground plant material stored an average of 168 g C•m-2 and below-ground biomass stored an average of 107 g C•m-2. Substrate carbon content averaged 913 g C•m-2, sequestering 100 g C•m -2 beyond what was in the initial substrate. The entire extensive green roof system sequestered 375 g C•m-2. There was a species effect on above- and below-ground carbon, but not on substrate carbon.
520 $a Proper plant selection for green roofs is of the utmost importance, for if the plants fail, the energy savings and carbon mitigation will likely be reduced. Two additional studies evaluated the effect of green roof substrate depth on plant community development over four years in a Midwestern climate. The first study evaluated plugs of 12 Sedum species bi-weekly for absolute cover (AC) at 4.0 cm, 7.0 cm, and 10.0 cm substrate depths. Most species exhibited greater growth and coverage at a substrate depth of 7.0 cm and 10.0 cm relative to 4.0 cm. Species exhibiting the greatest AC at all substrate depths were S. floriferum, S. sexangulare, S. spurium 'John Creech', and S. stefco. In general, species that are less suitable at these substrate depths are S. 'Angelina', S. cauticola 'Lidakense', S. ewersii, S. ochroleucum, and S. reflexum 'Blue Spruce'. The second study quantified the effect of solar radiation (full sun vs. full shade) on several U.S. native and non-native species for potential use on extensive green roofs. Plugs of six native and three non-native species and seed of six typical extensive green roof species of Sedum were established at three different substrate depths (8.0 cm, 10.0 cm, and 12.0 cm) both in sun and shade. AC was recorded as before. By week 174 (23 Sept 2008), most species exhibited different AC within a depth between sun and shade. However, when all species were combined, overall AC did not differ between sun and shade within a depth. This indicated that while species make-up was changing among solar radiation levels, that overall coverage was not significantly different. The most abundant species were Allium cernuum, S. acre, S. album, S. kamtschaticum, S. spurium and Talinum calycinum. Less suitable species included Carex flacca, S. divergens, S. pulchellum, S. stenopetalum, and Talinum parviflorum. Allium cernuum, S. acre, S. kamtschaticum, and S. spurium are suitable in the shade.
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