Effect of substrate depth on initial growth and drought tolerance of Sedum lineare in extensive green roof system

Lu, Jian; Yuan, Jiangang; Yang, Junzhi; Chen, Aikui; Yang, Zhongyi

doi:10.1016/j.ecoleng.2014.11.018

Cited by 24 publications

(12 citation statements)

References 32 publications

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“…Our results are consistent with several studies that showed a positive effect of increasing depth on plant biomass (Dunnett, Nagase, & Hallam, ; Durhman, Rowe, Building, Lansing, & Rugh, ; Lu et al., ; Thuring et al., ). Although we simulated dry environmental conditions, water was regularly provided.…”

Section: Discussionsupporting

confidence: 93%

“…A pot experiment cannot strictly reproduce the conditions experienced by full size green roofs, but it represents the only realistic way to implement 2 × 2 × 20 treatments with the desired level of replication. Despite their small size, microcosms are indeed useful in understanding larger scale ecological processes (Benton, Solan, Travis, & Sait, ) and pots with diameters as low as 100 or 110 mm have already been used to simulate green roof conditions (VanWoert, Rowe, Andresen, Rugh & Xiao, ; Durhman, Rowe & Rugh ; Wolf & Lundholm, ; Lu, Yuan, Yang, Chen, & Yang, ). We assessed the following functions: water retention, nitrogen and carbon storage in leaves, maximum leaf transpiration, aboveground and belowground biomass production, DOC, and nitrate leaching.…”

Section: Introductionmentioning

confidence: 99%

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Multifunctionality is affected by interactions between green roof plant species, substrate depth, and substrate type

Dusza

Barot

Kraepiel

et al. 2017

Ecology and Evolution

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SummaryGreen roofs provide ecosystem services through evapotranspiration and nutrient cycling that depend, among others, on plant species, substrate type, and substrate depth. However, no study has assessed thoroughly how interactions between these factors alter ecosystem functions and multifunctionality of green roofs. We simulated some green roof conditions in a pot experiment. We planted 20 plant species from 10 genera and five families (Asteraceae, Caryophyllaceae, Crassulaceae, Fabaceae, and Poaceae) on two substrate types (natural vs. artificial) and two substrate depths (10 cm vs. 30 cm). As indicators of major ecosystem functions, we measured aboveground and belowground biomasses, foliar nitrogen and carbon content, foliar transpiration, substrate water retention, and dissolved organic carbon and nitrates in leachates. Interactions between substrate type and depth strongly affected ecosystem functions. Biomass production was increased in the artificial substrate and deeper substrates, as was water retention in most cases. In contrast, dissolved organic carbon leaching was higher in the artificial substrates. Except for the Fabaceae species, nitrate leaching was reduced in deep, natural soils. The highest transpiration rates were associated with natural soils. All functions were modulated by plant families or species. Plant effects differed according to the observed function and the type and depth of the substrate. Fabaceae species grown on natural soils had the most noticeable patterns, allowing high biomass production and high water retention but also high nitrate leaching from deep pots. No single combination of factors enhanced simultaneously all studied ecosystem functions, highlighting that soil–plant interactions induce trade‐offs between ecosystem functions. Substrate type and depth interactions are major drivers for green roof multifunctionality.

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Section: Discussionsupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Multifunctionality is affected by interactions between green roof plant species, substrate depth, and substrate type

Dusza

Barot

Kraepiel

et al. 2017

Ecology and Evolution

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“…Previous research has shown Sedum spp. reliability and dependability to be of crucial importance in green roof implementation [18]. b Aptenia cordifolia is a succulent with bright green leaves and red flowers.…”

Section: Selection Of Plant Speciesmentioning

confidence: 99%

“…Three types of plants with different appearances and adaptation strategies were selected [18][19][20]. There were six replicates for each plant species.…”

Section: Selection Of Plant Speciesmentioning

confidence: 99%

Thermal Study on Extensive Green Roof Integrated Irrigation in Northwestern Arid Regions of China

Wang

Singh

et al. 2017

Water

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Selection of xerophils and drought tolerant plants is highly crucial in green roof techniques in the drought prone regions of Northwest China. In this study, the thermal performance under the natural conventional climate in summer was analyzed using a self-made simulation experimental platform through comparison of the internal surface temperature with and without green roofs. The distribution frequency of internal surface temperature was investigated by dividing internal surface temperature into several ranges. Statistical analysis showed that the frequency of internal surface temperature lower than 33 • C for green roofs was 91.8%, about 1.09 times higher than that for non-green roofs, and that the sum of internal surface temperature exceeding 35 • C was about one third of that for non-green roofs. The results proved that green roofs have a significant insulation effect. Moreover, the thermal insulation property of green roofs had a strong positive relation with outside temperature. The thermal insulation characteristic was improved as the outdoor temperature increased, additionally, it had a better insulation effect within two hours after irrigation.

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“…type of substrate and its depth, vegetation, slope, and filter system) and the specific climatological conditions of the study area (e.g. rainfall depth and evapotranspiration), as well as the characteristics of rainfall events, such as maximum intensity, duration and dry antecedent period [2,12,13] GRs are promoted for their potential to provide high runoff retention efficiencies; however, the effect that a GR may have on the runoff water quality is still not fully understood [14] due to non-conclusive, and even contradictory findings in the research [1,3,14,15,16,17,18,19,20,21,22,23,24,25]. The high variability concerning GR's runoff water quality is mainly a result of its high dependence on the substrate, vegetation, and hydrological variables of each specific site [2].…”

Section: Introductionmentioning

confidence: 99%

Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality

Ferrans¹,

Rey²,

Pérez³

et al. 2018

Preprint

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This study assessed the hydrological performance and runoff water quality of 12 green roof (GR) modular systems located at the Universidad de los Andes campus (Bogotá, Colombia). Based on 223 rainfall events spanning a 3-year period, average rainfall retention was 85% (SD = 25%). T-tests, Welch Test, multiple linear regressions and correlation analysis were performed in order to assess the potential effect of air temperature, substrate type, vegetation cover, relative humidity, antecedent dry weather period (ADWP), rainfall duration and rainfall maximum intensity. In some cases, GR design variables (i.e. growing media and type of vegetation) were found to be significant for describing rainfall retention efficiencies and, depending on the GR type, some hydrological variables were also correlated with the rainfall retention. Rainfall and GR runoff were monitored for Total Kjeldahl Nitrogen (TKN), Nitrates, Nitrites, Ammonia, Total Phosphorus (TP), Phosphates, pH, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Color, Turbidity, Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Total Coliforms, metals and Poliaromatic Hydrocarbons (PAHs). The results obtained confirmed that GR systems have the ability to neutralize pH, but are source of the rest of the aforementioned parameters, excluding PAHs (with concentrations below detection limits), Ammonia, TSS, Se and Li, where differences with reference values (rainfall and plastic panel runoff) were not statistically significant. Substrate type, event size and rainfall regime are relevant variables for explaining runoff water quality.

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Effect of substrate depth on initial growth and drought tolerance of Sedum lineare in extensive green roof system

Cited by 24 publications

References 32 publications

Multifunctionality is affected by interactions between green roof plant species, substrate depth, and substrate type

Multifunctionality is affected by interactions between green roof plant species, substrate depth, and substrate type

Thermal Study on Extensive Green Roof Integrated Irrigation in Northwestern Arid Regions of China

Effect of Green Roof Configuration and Hydrological Variables on Runoff Water Quantity and Quality

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