Sedum cools soil and can improve neighboring plant performance during water deficit on a green roof

Butler, C.; Orians, Colin M.

doi:10.1016/j.ecoleng.2011.06.025

Cited by 145 publications

(70 citation statements)

References 23 publications

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“…These responses were similar to those of the other Sedum species (Lee and Griffiths, 1987;Gravatt and Martin, 1992). In addition, some previous studies have suggested that the Sedum green roof plants use the C3 photosynthetic pathway (Durhman et al, 2006;Butler and Orians, 2011). Our results for the plants subjected to the wet and dry treatments are consistent with this photosynthetic response occurring in green roofs.…”

Section: Discussionsupporting

confidence: 80%

Photosynthetic and Transpiration Rates of Three <I>Sedum</I> Species Used for Green Roofs

Kuronuma

Watanabe

2017

Environmental Control in Biology

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Section: Discussionsupporting

confidence: 80%

Photosynthetic and Transpiration Rates of Three <I>Sedum</I> Species Used for Green Roofs

Kuronuma

Watanabe

2017

Environmental Control in Biology

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“…Previous studies have shown that the presence of Sedum can improve substrate moisture content by reducing evapotranspiration rates (Durhman et al, 2006;VanWoert et al, 2005;Wolf & Lundholm, 2008) and mat forming species can reduce substrate temperature . Although Butler and Orians (2011) have previously shown that Sedum can facilitate the appearance of neighbouring plants during drought, this current trial shows that the negative competitive effects of Sedum outweigh any potential benefits of this species as a companion plant.…”

Section: Sedum Covermentioning

confidence: 86%

“…Commonly used Sedum spp. mats have been shown to reduce green roof substrate temperatures (Butler & Orians, 2011), maintain higher levels of water in substrate by impeding evaporation (Wolf & Lundholm, 2008) and improve companion plant appearance during a severe drought potentially due to a facilitative effect (Butler & Orians, 2011). However a trade-off will exist using this method as reducing water loss from the substrate will reduce a substrates storm water retention capacity and therefore ability to mitigate storm water.…”

Section: Introductionmentioning

confidence: 99%

Increasing green roof plant drought tolerance through substrate modification and the use of water retention gels

Young

Cameron

Phoenix

2015

Urban Water Journal

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The optimal provision of green roof services is largely dependent on the health of the vegetation on the green roof, which is often affected by water availability.We assessed the impact of two substrate components, brick particle size and a polyacrylamide gel additive, and a living mulch (companion planting of Sedum spp.) on the growth, physiological and visual health of newly established plugs of Festuca ovina and Linaria vulgaris during an extreme drought (25 days) in a controlled environment greenhouse. Polyacrylamide gel and large brick substrates increased both plant species' drought tolerance whilst a Sedum living mulch had no effect. Polyacrylamide gel increased the reservoir of water that plants could access during the drought, whilst large brick promoted slower and therefore more drought resistant plant growth. Overall this study shows that polyacrylamide gel and coarser particle size substrates can significantly improve the drought tolerance of green roof plants.

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“…Other studies have shown that plants with mat-forming growth can benefit less drought-tolerant species 16 . In addition to this, Cladonia lichens do not appear detrimental to plant growth.…”

Section: Discussionmentioning

confidence: 99%

Cladonia lichens on extensive green roofs: evapotranspiration, substrate temperature, and albedo

Heim

Lundholm

2013

F1000Res

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Green roofs are constructed ecosystems that provide ecosystem services in urban environments. Shallow substrate green roofs subject the vegetation layer to desiccation and other environmental extremes, so researchers have evaluated a variety of stress-tolerant vegetation types for green roof applications. Lichens can be found in most terrestrial habitats. They are able to survive extremely harsh conditions, including frequent cycles of desiccation and rehydration, nutrient-poor soil, fluctuating temperatures, and high UV intensities. Extensive green roofs (substrate depth <20cm) exhibit these harsh conditions, making lichens possible candidates for incorporation into the vegetation layer on extensive green roofs. In a modular green roof system, we tested the effect of Cladonia lichens on substrate temperature, water loss, and albedo compared to a substrate-only control. Overall, the Cladonia modules had significantly cooler substrate temperatures during the summer and significantly warmer temperatures during the fall. Additionally, the Cladonia modules lost significantly less water than the substrate-only control. This implies that they may be able to benefit neighboring vascular plant species by reducing water loss and maintaining favorable substrate temperatures.

show abstract

Sedum cools soil and can improve neighboring plant performance during water deficit on a green roof

Cited by 145 publications

References 23 publications

Photosynthetic and Transpiration Rates of Three <I>Sedum</I> Species Used for Green Roofs

Photosynthetic and Transpiration Rates of Three <I>Sedum</I> Species Used for Green Roofs

Increasing green roof plant drought tolerance through substrate modification and the use of water retention gels

Cladonia lichens on extensive green roofs: evapotranspiration, substrate temperature, and albedo

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