This summer, I did a deep research on a very interesting cactus: The Golden Barrel Cactus. While writing my literature review down below, I made sure to not give any misleading information, did not use any AI, and was extremely careful about academic integrity and plagiarism. This topic, in my opinion, has a very big potential, and I was planning to conduct an academic research about it. However, I decided to join an academic research program instead. Therefore I wanted to post about it so more people can find out about this research gap.
Organisms living in deserts face harsh environmental stresses and thus require special adaptations to survive. Deserts combine high daytime temperatures, strong solar radiation, a high potential for water loss through evaporation, and large differences between daytime and nighttime temperatures. Consequently, many desert plant species have evolved specialized adaptations to survive under these environmental conditions. Specifically, cacti have developed a suite of morphological and physiological adaptations that help them survive during long periods of drought, high levels of solar radiation, and temperature extremes. The golden barrel cactus (Echinocactus grusonii) is known for its barrel-shaped form, clearly visible ribs, and characteristic spines. The cactus also has a thick, water-storing stem and uses crassulacean acid metabolism (CAM) photosynthesis. These features contribute to water conservation and thermal regulation under harsh desert conditions.
Lewis and Nobel (1977) investigated the influence of cactus morphology on thermal performance using a detailed energy-balance model of Ferocactus acanthodes. The model examined how morphological, physiological, and environmental variables affected the cactus’s thermal behavior. By changing individual variables within the model, the researchers estimated which factors had the strongest influence on surface temperature. Their results indicated that cactus morphology affected thermal performance. The ribbed surface provided 54% more area for convective heat loss than a smooth outer surface with the same overall dimensions. The spines had little effect on average daily surface temperature but reduced the size of daytime and nighttime temperature changes. When both the ribs and spines were removed in the simulation, the average daytime surface temperature rose by approximately 5°C. Because the study examined the cactus’s existing morphology rather than systematically changing rib depth, spacing, or shape, it did not determine whether a different rib design could provide greater passive cooling. Nevertheless, Lewis and Nobel provided quantitative evidence that cactus morphology can influence thermal regulation under the modeled conditions. Kuru et al. (2020) shifted the focus toward architecture by developing a framework for translating biological strategies into biomimetic adaptive building skins.
Translating Biological Strategies into Adaptive Building Skins
Kuru et al. argued that existing biomimetic design frameworks provided limited guidance for combining multiple biological functions into one multifunctional system. The researchers developed a design framework called the Multi-Biomechanism Approach that helps architects identify a building problem, find biological systems that address it, study several biological mechanisms, and translate those mechanisms into one multifunctional façade. The framework uses hierarchy and heterogeneity to combine functions through structures at different scales and with different forms. Kuru et al. designed a digital adaptive façade module inspired by the Golden Barrel Cactus using this framework. The modules replaced the windows of a digital educational-building model in a computer simulation. The system addressed multiple environmental functions, including heat, air, and light regulation, through shading, ventilation, and control of sunlight. The design was evaluated digitally rather than physically built and tested on a real school. Kuru et al. found that the Bio-ABS system reduced thermally uncomfortable hours by a maximum of 23.18% under the 90% acceptability limit compared with the reference model. Because the researchers evaluated the combined Bio-ABS system rather than isolated rib designs, the study did not determine how rib geometry alone affected thermal performance.
Finding the optimum ratio (if there is one) can help us designers to create more sustainable buildings while also being creative.
