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The potential of lichen and moss in sustainable contemporary

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Michele Bradanini

on 17 December 2015

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Transcript of The potential of lichen and moss in sustainable contemporary

The potential of lichen and moss in sustainable contemporary facade design
Background

What is a lichen?
Symbiotic organism
Association of a photobiont and a mycobiont
"Lichens are fungi that have discovered agriculture"
[Trevor Goward]
Photobiont: Alga/Cyanobacteria

Mycobiont: Fungi
Which parameters influence the bio-receptivity of a substrate?

What are the advantages of having lichens on a facade?

Influencing factors attributed to the
environment
:


Influencing factors attributed to the
substrate
:
Hygrometry
Distance from the sea
Presence or absence of vegetation
Climate
Thermal amplitude
Precipitations
Exposition
Surface pH
Composition of substratum

Wetness of facade (porosity, roughness)
Architectural parameters inducing micro-humidity
Cross section of a lichen
Same advantages of a Green facade with no need for apposite structure

Natural substitute for paint

Change colors in different seasons

Building Profile Beautification

Improved Air Quality

Biodiversity & Habitat

Acoustic Buffering

Biophilic Design and Inhabitant Health

Increased Thermal Insulation

Can be used as bio-monitor for air quality
The Project
Iceland
Method
Conclusions
Experiments to understand which material is better as substrate for lichen colonization
Lichens grow well in Iceland because it is one of the least polluted countries in the world. They draw their nutrients from the environment and are easily contaminated indeed.
Icelandic lava stone
Basalt stone
Red lava stone
Icelandic lichen (Xantoria)
The moss wall at the Reykjavik City Hall (Studio Granda)
Collecting and casting the specimens to be used as substrates
Collecting the lichens both from Iceland and Denmark
"Gluing" the lichens to the substrates through a growth media
Observing if lichens attach to the substrate and if they grow.
From the outdoor experiment we will be able to define which substrate better fits for biocolonization by the specific type of lichen, and which exposition, orientation and type of structure is better for the lichen's growth.
From the indoor experiment we will be able to define how porosity influences the way lichens attach to surfaces.
References
Ascaso, C., & Wierzchos, J. (1994). Structural Aspects of the Lichen-Rock Interface Using Back-scattered Electron Imaging. Botanica Acta, 107(4), 251-256.
Azmi, O. R., Seppelt, R. D. (1997). Fungi of the Windmill Islands, continental Antarctica. Effect of temperature, pH and culture media on the growth of selected microfungi.
Polar Biology
, June, Volume 18, Issue 2, 128-134.
Hauck, M., Jürgens, S. R., & Leuschner, C. (2010). Norstictic acid: correlations between its physico-chemical characteristics and ecological preferences of lichens producing this depsidone. Environmental and experimental botany, 68(3), 309-313.
Barberousse, H., Lombardo, R. J., Tell, G., & Couté, A. (2006). Factors involved in the colonisation of building façades by algae and cyanobacteria in France. Biofouling, 22(02), 69-77.
Vingiani, S., Terribile, F., & Adamo, P. (2013). Weathering and particle entrapment at the rock–lichen interface in Italian volcanic environments. Geoderma, 207, 244-255.
Manso, S., Mestres, G., Ginebra, M. P., De Belie, N., Segura, I., & Aguado, A. (2014). Development of a low pH cementitious material to enlarge bioreceptivity. Construction and Building Materials, 54, 485-495.
Manso, S., de Cea, A. A., Pérez, I. S., & De Belie, N. Bioreceptivity Optimisation of Concrete Substratum to Stimulate Biological Colonisation.
de los Ríos, A., Cámara, B., del Cura, M. Á. G., Rico, V. J., Galván, V., & Ascaso, C. (2009). Deteriorating effects of lichen and microbial colonization of carbonate building rocks in the Romanesque churches of Segovia (Spain). Science of the total environment, 407(3), 1123-1134.
Moorhouse, E. (2011, October 21). Professor 'Going Green' in New York City with Lichen Project. Retrieved from: news.rutgers.edu/news-releases/2011/10/professor-going-gree-20111021#.VfAEh_ntmko
Outdoor experiment setup

Indoor experiment setup
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