Atacama Desert – Genius of Place
Claudia RiveraSchool of Chemistry, National Autonomous
University of Mexico, Mexico City, [email protected]
What is a genius of place study?
● Tool developed by Biomimicry 3.8● Allows us to look into nature in specific
places or areas● Helps to obtain information on locally-
attuned organisms● Organisms are expected to have
developed unique strategies
Why the Atacama Desert ecoregion?
Source: WWF
Deserts and xeric shrublands: recognized as some of the more outstanding regional centers of richness and endemism
Why the Atacama Desert ecoregion?
● Driest non-polar (McKay et al., 2003)
● Oldest extant desert in the world (Azua-Bustos et al., 2017; Hartley et al., 2005)
● Sandy soil, salt lakes, stony terrain and felsic lava flowing towards the Andes.
Hartley et al., 2005
Extreme environmental challenges
● Extreme temperatures● Sunlight exposure● Strong winds● Thin atmosphere (organisms thrive in low
oxygen levels)● Salinity● Hyper-aridity -low precipitation-● Variability in available water (precipitation)
Atacama Desert Champions
Llareta (Azorella compacta)
Martin Mergili (distributed via imaggeo.egu.eu) CC BY 3.0
Llareta (Azorella compacta)
Biological Strategy -Adaptation-
Extreme temperatures
Strong winds
Hyper-aridity
Variability in available water
CC BY 3.0 Credit: Martin Mergili
Llareta is a woody cushion plant characterised by a densely branched hemispherical to mat-like growth form with the presence of a central taproot. The dense branching structure of llareta allows to store heat energy efficiently, providing buffering against sharp diurnal changes in ambient air temperature. Its cross-sectional shape provides minimal wind drag and thus reduces boundary layer turbulence around it's canopy (Kleier and Rundel 2004; 2008; Ralph, 1978; Wickens, 1985).
Moisture trapped in the dead tissue within the interior of the cushion could serve as a reservoir. The tiny, thick leaves, compact growth and resin content could contribute as well to reduce water loss and aid freezing resistance (Wickens, 1995).
Llareta (Azorella compacta)
Biological Strategy -Adaptation-
Extreme temperatures
Strong winds
Hyper-aridity
Variability in available water
CC BY 3.0 Credit: Martin Mergili
Structure is formed by tightly packed branched stems, forming a smooth exterior surface, converging to a single broad basal taproot. Each stem ends in a small rosette 1–2 cm in diameter. Stems maintain this tightly packed surface, without any gaps between rosettes. Rosettes are comprised of smooth leaves ranging from 3 to 10 mm in length and 1–2 mm in width (Kleier and Rundel 2004; 2008).
Image source: http://plants.jstor.org/stable/10.5555/al.ap.specimen.e00131889
Image source: Ralph, 1978
Llareta (Azorella compacta)
Extreme temperatures
Strong winds
Hyper-aridity
Variability in available water
Abstracted Design Principle
CC BY 3.0 Credit: Martin Mergili
A branched structure formed by tightly packed rosette elements of 1-2 cm of diameter converging to a single broad base is able to store heat energy, provide buffering against extreme temperatures and minimal wind drag.
Protuberances in between the branched structure store fluids.
Llareta (Azorella compacta)
Extreme temperatures
Strong winds
Hyper-aridity
Variability in available water
Design ideas / applications
CC BY 3.0 Credit: Martin Mergili
● Flexible, rigid or panel insulation systems that mimic the structure and rosette form
● Flexible sheets/blankets that both mimic the structure and rosette form and allow to not only insulate but also store fluids
● Structures design robust enough to accomplish minimal wind drag
Llareta (Azorella compacta)
Extreme temperatures
Strong winds
Hyper-aridity
Variability in available water
Design ideas / applications
CC BY 3.0 Credit: Martin Mergili
● Further design considerations● Is it possible to modify scales of the design idea?
(i.e. go to smaller or larger scales) -larger structures or membranes-
● Future work● Analize surface structure
of leaves● Chemically analize resin
inside leaves (possible anti-freezing properties)
Desert Holly (Atriplex Atacamensis)
Source: http://www.chileambiente.cl/atriplex-atacamensis-phil/
Desert Holly(Atriplex Atacamensis)
Biological Strategy -Adaptation-
Salinity Hyper-aridityMetalloid exposure
http://eco-antropologia.blogspot.mx
Atriplex atacamensis is a halophytic perennial shrub, native of Northern Chile (Atacama desert) and is able to cope with high As contents in its environment. Without exhibiting toxicity symptoms, it mainly retains -absorbs- As in the roots, preventing the metalloid from spreading in this arid area through the soil or by wind (Tapia et al., 2013; Tapia Fernández et al., 2016; Vromann et al., 2016).
Desert Holly(Atriplex Atacamensis)
Biological Strategy -Adaptation-
Salinity Hyper-aridityMetalloid exposure
http://eco-antropologia.blogspot.mx
Exogenous salinity reduces As uptake by the roots but increased its translocation to the leaves where As in mainly stored in As(V) form (Vromann et al., 2016).
As-treated plants are able to efficiently close their stomata in order to limit water losses and to accumulate glycinebetaine as an efficient osmoprotectant (Vromman et al., 2011; Lutts and Lefèvre 2015).
Desert Holly(Atriplex Atacamensis)
Abstracted Design Prnciple
Salinity Hyper-aridityMetalloid exposure
http://eco-antropologia.blogspot.mx
Salinity levels control Arsenic absorption, increased salinity prevents absorption at some parts but promotes transfer and absorption to other parts of a structure.
NaCl
NaCl
NaCl
NaClNaCl
NaCl
NaCl
AsAs As
As As
AsAs As
AsAs
As
As As As
As
As
As
As
NaCl As
As
As
AsNaCl NaCl
Desert Holly(Atriplex Atacamensis)
Abstracted Design Prnciple
Salinity Hyper-aridityMetalloid exposure
http://eco-antropologia.blogspot.mx
Quaternary ammonium compounds (glycinebetaine)maintain selective barriers integrity and protection of other membrane-like structures.
Desert Holly(Atriplex Atacamensis)
Design ideas / applications
Salinity Hyper-aridityMetalloid exposure
http://eco-antropologia.blogspot.mx
● Filters (As)● Controlled absorption of Arsenic (by NaCl
adjustments)● Selective transport of Arsenic● Selective allocation of Arsenic● Membranes
● Further considerations:● Air and water
Atacama Desert Champions
Acknowledgements
● Organisms that thrive in the Atacama Desert.
● Scientists that have conducted research (and shared it through publications) about organisms living in the Atacama Desert.
● Research partially funded by Program UNAM-DGAPA-PAPIIT IA100716 RA100716.
ReferencesAzua-Bustos, A., González-Silva, C., Corsini, G. (2017). The Hyperarid Core of the Atacama Desert, an Extremely Dry and Carbon Deprived Habitat of Potential Interest for the Field of Carbon Science. Frontiers in Microbiology, 8:993. doi: 10.3389/fmicb.2017.00993
Hartley, A. J., Chong, G., Houston, J., Mather A. E. (2005). 150 million years of climatic stability: evidence from the Atacama Desert, Northern Chile. Journal of the Geological Society, London, 162, 421 – 424.
Kleier, C. and Rundel, P. (2008). Energy balance and temperature relations of Azorella compacta, a high-elevation cushion plant of the central Andes. Plant Biology, 11, 351–358.
Kleier, C. and Rundel, P. (2004). Microsite requirements, population structure and growth of the cushion plant Azorella compacta in the tropical Chilean Andes. Austral Ecology, 29 , 461–470.
Lutts, S., and Lefèvre, I. (2015). How can we take advantage of halophyte properties to cope with heavy metal toxicity in salt-affected areas?. Annals of Botany 0, 1–20, doi:10.1093/aob/mcu264
McKay, C. P., Friedmann, E. I., Gómez-Silva, B., Cáceres-Villanueva, L., Andersen, D. T., Landheim, R. (2003). Temperature and Moisture Conditions for Life in the Extreme Arid Region of the Atacama Desert: Four Years of Observations Including the El Niño of 1997–1998. Astrobiology 3 (2), 393–406.
ReferencesRalph, C. P. (1978). Observations on Azorella compacta (Umbelliferae), a tropical Andean cushion plant. Biotropica, 10, 62-67.
Tapia Fernández, Y., Diaz O., Acuña, E., Casanova, M., Salazar, O., Masaguer, A. (2016). Phytostabilization of arsenic in soils with plants of the genus Atriplex established in situ in the Atacama Desert. Environmental Monitoring Assessment, 188: 235, DOI 10.1007/s10661-016-5247-x
Tapia, Y., Diaz, O., Pizarro, C., Segura, R., Vines, M., Zúñiga, G., Moreno-Jiménez, E. (2013). Atriplex atacamensis and Atriplex halimus resist As contamination in Pre-Andean soils (northern Chile). Science of the Total Environment, 450–451, 188–196.
Vromman, D., Flores-Bavestrello, A., Šlejkovec, Z., Lapaille, S., Teixeira-Cardoso, C., Briceño, M., Kumar, M., Martínez, J-P., Lutts, S. (2011). Arsenic accumulation and distribution in relation to young seedling growth in Atriplex atacamensis Phil. Science of the Total Environment 412-413, 286–295.
Vromman, D., Lefèvre, I., Šlejkovec, Z., Martínez, J-P., Vanhecke, N., Briceño, M., Kumar, M., Lutts, S. (2016). Salinity influences arsenic resistance in the xerohalophyte Atriplex atacamensis Phil. Environmental and Experimental Botany, 126, 32–43.
Wickens, G. E. (1995). Llareta (Azorella Compacta, Umbelliferae): A review. Economic Botany 49(2), 207-212.
WWF (n.d.) WWF ecoregion map. Available at: http://wwf.panda.org/about_our_earth/ecoregions/maps/
References images
Atriplex Atacamensis
http://www.chileambiente.cl/atriplex-atacamensis-phil/
http://eco-antropologia.blogspot.mx
Chañar
https://www.geovirtual2.cl/Museovirtual/Plantas/Chanar01esp.htm
Chilean Mesquite
Penarc https://commons.wikimedia.org/w/index.php?curid=2859082
Desert Saltgrass
http://www.chileresponsibleadventure.com/chile/atacama-fauna-flora/
Guanaco
Fainmen at Flickr
Llareta
Martin Mergili (distributed via imaggeo.egu.eu) CC BY 3.0
http://plants.jstor.org/stable/10.5555/al.ap.specimen.e00131889
Southern Viscacha
Alexandre Buisse CC BY-SA 3.0
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