Optimising green roofs in the Netherlands: effects of mineral wool and compost additions on flowering success
DOI:
https://doi.org/10.24823/Sibbaldia.2026.3634Keywords:
Green roofs, Sedum roofs, Vegetated roofs, Urban Biodiversity, Urban green spaceAbstract
The continuous increase of the global human population living in cities has significantly impacted various aspects of nature and climate worldwide. One initiative to promote the urban green space and its biodiversity is the construction of green roofs. Despite the basic structure of these green roofs being similar around the world, the optimal design can depend greatly on local environmental conditions. In the Netherlands, it remains unclear how the flowering performance of green roofs can be enhanced beyond the relatively short flowering period of commonly used Sedum species. This study investigates the effects of adding mineral wool and compost to experimental green roof systems in the Netherlands. Mineral wool was applied as a water-retentive substrate layer, while compost was added as a nutrient-amending component. Flower and seed production, as well as plant species richness, were used as indicators of flowering performance on the green roofs at ground level. The results showed that mineral wool significantly increases the number of flowers and seeds, and the overall richness of plant species, stimulating both sown and spontaneously colonising species. The addition of compost did not affect these parameters. These results reveal that green roof designs incorporating water-retentive substrate components can enhance flowering performance, and suggest an expansion of the flowering period of green roofs in the Netherlands. This study evaluates these results in the context of the current state of green roof construction and management in urban areas.
References
ALBERTI, M. (2015). Eco-evolutionary dynamics in an urbanizing planet. Trends in Ecology & Evolution, 30(2): 114–126. https://doi.org/10.1016/j.tree.2014.11.007
ALOISIO, J.M., PALMER, M.I., TUININGA, A.R. & LEWIS, J.D. (2020). Introduced and native plant species composition of vacant unmanaged green roofs in New York City. Urban Ecosystems, 23(6): 1227–1238. https://doi.org/10.1007/s11252-020-00992-6
ARONSON, M.F., LA SORTE, F.A., NILON, C.H., KATTI, M., GODDARD, M.A., LEPCZYK, C.A., WARREN, P.S., WILLIAMS, N.S.G., CILLIERS, S., CLARKSON, B., DOBBS, C., DOLAN, R. ET AL. (2014). A global analysis of the impacts of urbanization on bird and plant diversity reveals key anthropogenic drivers. Proceedings of the Royal Society B: Biological Sciences, 281(1780): 20133330. https://doi.org/10.1098/rspb.2013.3330
ARONSON, M.F., LEPCZYK, C.A., EVANS, K.L., GODDARD, M.A., LERMAN, S.B., MACIVOR, J.S. & VARGO, T. (2017). Biodiversity in the city: key challenges for urban green space management. Frontiers in Ecology and the Environment, 15(4): 189–196. https://doi.org/10.1002/fee.1480
BATES, A.J., SADLER, J.P. & MACKAY, R. (2013). Vegetation development over four years on two green roofs in the UK. Urban Forestry & Urban Greening, 12(1): 98–108. https://doi.org/10.1016/j.ufug.2012.12.003
BENINDE, J., VEITH, M. & HOCHKIRCH, A. (2015). Biodiversity in cities needs space: a meta-analysis of factors determining intra-urban biodiversity variation. Ecology Letters, 18(6): 581–592. https://doi.org/10.1111/ele.12427
BERARDI, U., GHAFFARIANHOSEINI, A. & GHAFFARIANHOSEINI, A. (2014). State-of-the-art analysis of the environmental benefits of green roofs. Applied Energy, 115: 411–428. https://doi.org/10.1016/j.apenergy.2013.10.047
BLANUSA, T., MONTEIRO, M.M.V., FANTOZZI, F., VYSINI, E., LI, Y. & CAMERON, R.W. (2013). Alternatives to Sedum on green roofs: can broad leaf perennial plants offer better ‘cooling service’? Building and Environment, 59: 99–106. https://doi.org/10.1016/j.buildenv.2012.08.011
DE GROOTH, K. (2024). Flowering plant and pollinator responses to mineral wool on extensive green roofs. Unpublished research paper, Leiden University.
DICKMAN, C.R. (1987). Habitat fragmentation and vertebrate species richness in an urban environment. Journal of Applied Ecology, 24(2): 337–351. https://doi.org/10.2307/2403879
DRUKKER, E.F., SCHRANZ, M.E., VET, L.E., VOETEN, J., FATOUROS, N.E. & QUIST, C.W. (2025). The development of insect diversity and ecosystem complexity on green roofs: a review. Insect Conservation and Diversity, 19(1): 11–25. https://doi.org/10.1111/icad.70007
DURHMAN, A.K., ROWE, D.B. & RUGH, C.L. (2007). Effect of substrate depth on initial growth, coverage, and survival of 25 succulent green roof plant taxa. HortScience, 42(3): 588–595. https://doi.org/10.21273/HORTSCI.42.3.588
DUSZA, Y., KRAEPIEL, Y., ABBADIE, L., BAROT, S., CARMIGNAC, D., DAJOZ, I. & RAYNAUD, X. (2020). Plant-pollinator interactions on green roofs are mediated by substrate characteristics and plant community composition. Acta Oecologica, 105: 103559. https://doi.org/10.1016/j.actao.2020.103559
ELMQVIST, T., FRAGKIAS, M., GOODNESS, J., GÜNERALP, B., MARCOTULLIO, P.J., MCDONALD, R.I. & WILKINSON, C. (2013). Urbanization, Biodiversity and Ecosystem Services: Challenges and Opportunities: A Global Assessment. Springer Nature, Cham.
FABIÁN, D., GONZÁLEZ, E., DOMÍNGUEZ, M.V.S., SALVO, A. & FENOGLIO, M.S. (2021). Towards the design of biodiverse green roofs in Argentina: assessing key elements for different functional groups of arthropods. Urban Forestry & Urban Greening, 61: 127107. https://doi.org/10.1016/j.ufug.2021.127107
FAETH, S.H., BANG, C. & SAARI, S. (2011). Urban biodiversity: patterns and mechanisms. Annals of the New York Academy of Sciences, 1223(1): 69–81. https://doi.org/10.1111/j.1749-6632.2010.05925.x
FISCHER, J. & LINDENMAYER, D.B. (2007). Landscape modification and habitat fragmentation: a synthesis. Global Ecology and Biogeography, 16(3): 265–280. https://doi.org/10.1111/j.1466-8238.2007.00287.x
FRANCIS, L.F.M. & JENSEN, M.B. (2017). Benefits of green roofs: a systematic review of the evidence for three ecosystem services. Urban Forestry & Urban Greening, 28: 167–176. https://doi.org/10.1016/j.ufug.2017.10.015
GETTER, K.L. & ROWE, D.B. (2006). The role of extensive green roofs in sustainable development. HortScience, 41(5): 1276–1285. https://doi.org/10.21273/HORTSCI.41.5.1276
GETTER, K.L. & ROWE, D.B. (2009). Substrate depth influences Sedum plant community on a green roof. HortScience, 44(2): 401–407. https://doi.org/10.21273/HORTSCI.44.2.401
GRIMM, N.B., FAETH, S.H., GOLUBIEWSKI, N.E., REDMAN, C.L., WU, J., BAI, X. & BRIGGS, J.M. (2008). Global change and the ecology of cities. Science, 319(5864): 756–760. https://doi.org/10.1126/science.1150195
JOHNSON, M.T. & MUNSHI-SOUTH, J. (2017). Evolution of life in urban environments. Science, 358(6363): eaam8327. https://doi.org/10.1126/science.aam8327
JUNGELS, J., RAKOW, D.A., ALLRED, S.B. & SKELLY, S.M. (2013). Attitudes and aesthetic reactions toward green roofs in the Northeastern United States. Landscape and Urban Planning, 117: 13–21. https://doi.org/10.1016/j.landurbplan.2013.04.013
KAZEMI, F. & MOHORKO, R. (2017). Review on the roles and effects of growing media on plant performance in green roofs in world climates. Urban Forestry & Urban Greening, 23: 13–26. https://doi.org/10.1016/j.ufug.2017.02.006
KOROXENIDIS, E. & THEODOSIOU, T. (2021). Comparative environmental and economic evaluation of green roofs under Mediterranean climate conditions – extensive green roofs a potentially preferable solution. Journal of Cleaner Production, 311: 127563. https://doi.org/10.1016/j.jclepro.2021.127563
KOSTADINOVIĆ, D., JOVANOVIĆ, M., BAKIĆ, V., STEPANIĆ, N. & TODOROVIĆ, M. (2022). Experimental investigation of summer thermal performance of the green roof system with mineral wool substrate. Building and Environment, 217: 109061. https://doi.org/10.1016/j.buildenv.2022.109061
KRIVTSOV, V. (2025). Green and blue-green infrastructure – benefits, trade-offs, and optimisation of ecosystem services: an overview with perspectives for research and management. Plant Ecology & Diversity, 18(5–6): 267–285. https://doi.org/10.1080/17550874.2025.2585476
KSIAZEK-MIKENAS, K. & KÖHLER, M. (2018). Traits for stress-tolerance are associated with long-term plant survival on green roofs. Journal of Urban Ecology, 4(1): juy016. https://doi.org/10.1093/jue/juy016
LÖNNQVIST, J., BLECKEN, G.T. & VIKLANDER, M. (2021). Vegetation cover and plant diversity on cold climate green roofs. Journal of Urban Ecology, 7(1): juaa035. https://doi.org/10.1093/jue/juaa035
MACIVOR, J.S. & LUNDHOLM, J. (2011). Insect species composition and diversity on intensive green roofs and adjacent level-ground habitats. Urban Ecosystems, 14(2): 225–241. https://doi.org/10.1007/s11252-010-0149-0
MADRE, F., VERGNES, A., MACHON, N. & CLERGEAU, P. (2014). Green roofs as habitats for wild plant species in urban landscapes: first insights from a large-scale sampling. Landscape and Urban Planning, 122: 100–107. https://doi.org/10.1016/j.landurbplan.2013.11.012
MAYRAND, F. & CLERGEAU, P. (2018). Green roofs and green walls for biodiversity conservation: a contribution to urban connectivity? Sustainability, 10(4): 985. https://doi.org/10.3390/su10040985
MCKINNEY, M.L. (2006). Urbanization as a major cause of biotic homogenization. Biological Conservation, 127(3): 247–260. https://doi.org/10.1016/j.biocon.2005.09.005
MCKINNEY, M.L. (2008). Effects of urbanization on species richness: a review of plants and animals. Urban Ecosystems, 11: 161–176. https://doi.org/10.1007/s11252-007-0045-4
MOERLAND, W. (2011). Ecologische Waarden op Drie Groene Daken in Rotterdam. Bureau Stadsnatuur Rotterdam, Rotterdam.
NEVERMANN, S., HOFFMANN, H., THEODOROU, P., PETERS, I. & HUSEMANN, M. (2025). Metabarcoding assessment of arthropod diversity on green roofs in the metropolitan city of Hamburg. Journal of Urban Ecology, 11(1): juaf003. https://doi.org/10.1093/jue/juaf003
OBERNDORFER, E., LUNDHOLM, J., BASS, B., COFFMAN, R.R., DOSHI, H., DUNNETT, N., GAFFIN, S., KÖHLER, M., LIU, K.K.Y. & ROWE, B. (2007). Green roofs as urban ecosystems: ecological structures, functions, and services. BioScience, 57(10): 823–833. https://doi.org/10.1641/B571005
PÉREZ, G., COMA, J., CHOCARRO, C., JUÁREZ, A., MARÍN, C., RAUTER, F. & MAJKOVIČ, D. (2025). Rock mineral wool-based green roofs to improve the quality of urban water runoff. Environmental Science and Pollution Research, 32(14): 8986–9003. https://doi.org/10.1007/s11356-025-36232-7
RAZZAGHMANESH, M., BEECHAM, S. & SALEMI, T. (2016). The role of green roofs in mitigating Urban Heat Island effects in the metropolitan area of Adelaide, South Australia. Urban Forestry & Urban Greening, 15: 89–102. https://doi.org/10.1016/j.ufug.2015.11.013
R CORE TEAM (2025). R: A language and environment for statistical computing. R Foundation for Statistical Computing. Vienna, Austria. Available online: www.R-project.org (accessed August 2025).
SAX, D.F. & GAINES, S.D. (2003). Species diversity: from global decreases to local increases. Trends in Ecology & Evolution, 18(11): 561–566. https://doi.org/10.1016/S0169-5347(03)00224-6
SHOCHAT, E., LERMAN, S.B., ANDERIES, J.M., WARREN, P.S., FAETH, S.H. & NILON, C.H. (2010). Invasion, competition, and biodiversity loss in urban ecosystems. BioScience, 60(3): 199–208. https://doi.org/10.1525/bio.2010.60.3.6
START, D., BARBOUR, M.A. & BONNER, C. (2020). Urbanization reshapes a food web. Journal of Animal Ecology, 89(3): 808–816. https://doi.org/10.1111/1365-2656.13136
SUSCA, T., GAFFIN, S.R. & DELL’OSSO, G.R. (2011). Positive effects of vegetation: urban heat island and green roofs. Environmental Pollution, 159(8–9): 2119–2126. https://doi.org/10.1016/j.envpol.2011.03.007
TAN, C.L., TAN, P.Y., WONG, N.H., TAKASUNA, H., KUDO, T., TAKEMASA, Y. & CHUA, H.X.V. (2017). Impact of soil and water retention characteristics on green roof thermal performance. Energy and Buildings, 152: 830–842. https://doi.org/10.1016/j.enbuild.2017.01.011
TANIS, M. (2020). Roof buzz: the relation between pollinator diversity and green roof characteristics. Unpublished MSc thesis, Leiden University. Available online: https://openresearch.amsterdam/nl/page/68241/msc-thesis---roof-buzz-the-relation-between-pollinator-diversity-and (accessed April 2026).
THRELFALL, C.G., MATA, L., MACKIE, J.A., HAHS, A.K., STORK, N.E., WILLIAMS, N.S. & LIVESLEY, S.J. (2017). Increasing biodiversity in urban green spaces through simple vegetation interventions. Journal of Applied Ecology, 54(6): 1874–1883. https://doi.org/10.1111/1365-2664.12876
THURING, C.E., BERGHAGE, R.D. & BEATTIE, D.J. (2010). Green roof plant responses to different substrate types and depths under various drought conditions. Hort Technology, 20(2): 395–401. https://doi.org/10.21273/HORTTECH.20.2.395
UNITED NATIONS (2018). The World’s Cities in 2018. United Nations, New York.
VAN DER KOLK, H.J., VAN DEN BERG, P., VAN VEEN, T. & BEZEMER, M. (2023). Substrate composition impacts long-term vegetation development on blue-green roofs: insights from an experimental roof and greenhouse study. Ecological Engineering, 186: 106847. https://doi.org/10.1016/j.ecoleng.2022.106847
VIJAYARAGHAVAN, K. (2016). Green roofs: a critical review on the role of components, benefits, limitations and trends. Renewable and Sustainable Energy Reviews, 57: 740–752. https://doi.org/10.1016/j.rser.2015.12.119
WANG, L., WANG, H., WANG, Y., CHE, Y., GE, Z. & MAO, L. (2022). The relationship between green roofs and urban biodiversity: a systematic review. Biodiversity and Conservation, 31(7): 1771–1796. https://doi.org/10.1007/s10531-022-02436-3
WOOSTER, E.I.F., FLECK, R., TORPY, F., RAMP, D. & IRGA, P.J. (2022). Urban green roofs promote metropolitan biodiversity: a comparative case study. Building and Environment, 207: 108458. https://doi.org/10.1016/j.buildenv.2021.108458
WU, J. (2014). Urban ecology and sustainability: the state-of-the-science and future directions. Landscape and Urban Planning, 125: 209–221. https://doi.org/10.1016/j.landurbplan.2014.01.018
YOUNG, T.M., CAMERON, D.D. & PHOENIX, G.K. (2017). Increasing green roof plant drought tolerance through substrate modification and the use of water retention gels. Urban Water Journal, 14(6): 551–560. https://doi.org/10.1080/1573062X.2015.1036761
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