Architecture, Building and Planning - Research Publications
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ItemTerrestrial Lidar Reveals New Information About Habitats Provided by Large Old Trees(Elsevier, 2024)Large old trees have been described as keystone habitats for several species. However, current research does not fully explain why these species show a preference for such trees. In this study, we combined field observations of birds with terrestrial lidar scans and computational feature-recognition to describe habitats provided by trees at an unprecedented level of detail. We conducted field observations of birds at 62 trees and used parameters including branch angle, branch diameter, branch state (living or dead), and trunk diameter at breast height (DBH) to develop a generalised linear mixed model (GLMM) that could predict which types of branch birds are more likely to visit. We then quantified angles, diameters, and states of 78,006 branch objects representing the complete canopies of 16 trees. By combining these two models we predicted that large trees (>80 cm DBH) contained, on average, 383 m of branches that were highly suitable for birds (i.e., the predicted probability of observing a bird was ≥0.5), which was more than seven times the average length of highly suitable branches provided by medium trees (51–80 cm DBH). Only one of the sampled medium trees contained highly suitable branches. Small trees (<50 cm DBH) contained none. Our analysis provides new knowledge about characteristics that make large old trees disproportionately attractive to birds and presents a novel method of assessment that can apply to other complex habitat structures.
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ItemNo Preview AvailableToward Interspecies Art and Design Prosthetic Habitat-Structures in Human-Owl Cultures(MIT PRESS, 2022-08-01)Abstract Urbanization severely reduces opportunities for nonhuman habitation and undermines nonhuman subjectivities, aesthetic experiences, behaviors, traditions, and cultures. In response, humans need to reimagine cities as places for interspecies cohabitation. In this article, a team of architects and ecologists demonstrates that such reimagination depends on the cultural behaviors of multiple species. The authors illustrate the implications of this dependence by designing and discussing nesting structures for the powerful owl (Ninox strenua). The project shows that prosthetic habitats can serve as useful provocation for thinking about interspecies cultures. The authors use this work to propose productive avenues for further research.
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ItemNo Preview AvailableA framework for computer-aided design and manufacturing of habitat structures for cavity-dependent animals(WILEY, 2022-04)Abstract The decline of critical habitat structures, such as large old trees, is a global environmental challenge. The cavities that occur in these trees provide shelter and nesting sites for many species but can take centuries to develop. Artificial cavities, including nest boxes and carved logs, offer an increasingly important conservation response. However, current methods of designing, manufacturing and deploying such habitats have constraints that limit innovation, feasibility and effectiveness. In response, this article aims to provide new and broadly useable methods that can improve the design of habitat structures for cavity‐dependent animals. To address the shortcomings of existing methods, we develop an approach that uses computer‐aided design techniques of generative and parametric modelling to produce structures that satisfy stakeholder needs, computer‐aided manufacturing techniques of 3D printing and augmented‐reality assembly to build functional prototypes, and computer‐assisted techniques of laser scanning and data‐driven design to support installation, monitoring and iterative improvement of designs. We demonstrate this approach through a case‐study project that designs and instals habitat structures for the powerful owlNinox strenua, a cavity‐dependent and threatened bird. Through a comparison with existing methods, our pilot study shows that computer‐aided design and manufacturing can provide novel and useful approaches to develop artificial habitat‐structures. Computer‐aided design finds geometries that approximate the complex characteristics of natural tree cavities and automatically produces new versions to suit diverse sites or species. Computer‐aided manufacturing integrates materials that match the performance of naturally occurring habitat structures and facilitates the assembly of complex geometries by non‐experts. Computer‐assisted techniques produce precisely fitting and easy‐to‐instal designs, which support gradual improvement through ongoing prototyping and evaluation. These capabilities highlight how advanced design techniques can improve aspects of artificial habitat‐structures through geometric innovation, novel construction techniques and iterative exploration. Significantly, computational approaches can result in designs that can perform well, are easy to construct and instal and are applicable in many situations. Our reusable workflow can aid in the tasks of practical conservation and support ecological research by effectively negotiating the needs of both humans and target species.
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ItemModelling and Design of Habitat Features: Will Manufactured Poles Replace Living Trees as Perch Sites for Birds?(MDPI AG, 2023)The need to support life in degraded landscapes is a pressing challenge of our time. Models from ecology, computing, architecture, and engineering can support the design and construction of habitat features in contexts where human intervention is necessary and urgent. For example, anthropogenic change is causing many arboreal habitats to disappear due to diminishing populations of large old trees. Current management approaches can provide artificial replacements in the shape of poles for perching and boxes for nesting. However, their large-scale long-term impacts are rarely assessed and often unclear. Along with benefits, these structures can result in ecological traps, waste, and pollution. Although computer-aided design and fabrication can provide more sophisticated solutions, limited understanding of tree structures and their use by arboreal wildlife constrain the formulation of clear goals for engineering. In response, this research examines long-term implications at a restoration site that already features a variety of living and manufactured habitat structures. To do so, we build a computational simulation that uses high-fidelity lidar scans of trees in combination with field observations of bird interactions with branches. This simulation models landscape-scale dynamics of habitat supply over hundreds of years. It can account for many types of structures, including trees, snags, and utility poles, irrespective of the processes that led to their availability. We use this understanding of integrated supply to generate quantitative comparisons of design strategies that can inform design decisions in application to arboreal habitats and other modified ecosystems.
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ItemNo Preview AvailableInterspecies Cultures and Future Design(V&R unipress, 2022-04-11)This article introduces the notion of interspecies cultures and highlights its consequences for the ethics and practice of design. This discussion is critical because anthropogenic activities reduce the abundance, richness, and diversity of human and nonhuman cultures. Design that aims to address these issues will depend on interspecies cultures that support the flourishing of all organisms. Combining research in architecture and urban ecology, we focus on the design of urban habitat-structures. Design of such structures presents practical, theoretical, and ethical challenges. In response, we seek to align design to advancing knowledge of nonhuman cultures and more-than-human justice. We present interspecies design as an approach that incorporates human and nonhuman cultural knowledge in the management of future habitats. We ask: what is an ethically justifiable and practically plausible theoretical framework for interspecies design? Our central hypothesis is that the capabilities approach to justice can establish goals and evaluative practices for interspecies design. To test this hypothesis, we refer to an ongoing research project that aims to help the powerful owl (Ninox strenua) thrive in Australian cities. To establish possible goals for future interspecies design, we discuss powerful-owl capabilities in past, present, and possible future situations. We then consider the broader relevance of the capabilities approach by examining human-owl cultures in other settings, globally. Our case-study indicates that: 1) owl capabilities offer a useful baseline for future design; 2) cities diminish many owl capabilities but present opportunities for new cultural expressions; and 3) more ambitious design aspirations can support owl wellbeing in cities. The results demonstrate the capabilities approach can inform interspecies design processes, establish more equitable design goals, and set clearer criteria for success. These findings have important implications for researchers and built-environment practitioners who share the goal of supporting multispecies cohabitation in cities.
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ItemInterspecies Cultures and Future Design(Brill, 2022-04-01)This article introduces the notion of interspecies cultures and highlights its consequences for the ethics and practice of design. This discussion is critical because anthropogenic activities reduce the abundance, richness, and diversity of human and nonhuman cultures. Design that aims to address these issues will depend on interspecies cultures that support the flourishing of all organisms. Combining research in architecture and urban ecology, we focus on the design of urban habitat-structures. Design of such structures presents practical, theoretical, and ethical challenges. In response, we seek to align design to advancing knowledge of nonhuman cultures and more-than-human justice. We present interspecies design as an approach that incorporates human and nonhuman cultural knowledge in the management of future habitats. We ask: what is an ethically justifiable and practically plausible theoretical framework for interspecies design? Our central hypothesis is that the capabilities approach to justice can establish goals and evaluative practices for interspecies design. To test this hypothesis, we refer to an ongoing research project that aims to help the powerful owl (Ninox strenua) thrive in Australian cities. To establish possible goals for future interspecies design, we discuss powerful-owl capabilities in past, present, and possible future situations. We then consider the broader relevance of the capabilities approach by examining human-owl cultures in other settings, globally. Our case-study indicates that: 1) owl capabilities offer a useful baseline for future design; 2) cities diminish many owl capabilities but present opportunities for new cultural expressions; and 3) more ambitious design aspirations can support owl wellbeing in cities. The results demonstrate the capabilities approach can inform interspecies design processes, establish more equitable design goals, and set clearer criteria for success. These findings have important implications for researchers and built-environment practitioners who share the goal of supporting multispecies cohabitation in cities.
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ItemAn Artificial Intelligence Agent That Synthesises Visual Abstractions of Natural Forms to Support the Design of Human-Made Habitat Structures(Frontiers Media SA, 2022-03-17)Biodiversity is in a state of global collapse. Among the main drivers of this crisis is habitat degradation that destroys living spaces for animals, birds, and other species. Design and provision of human-made replacements for natural habitat structures can alleviate this situation. Can emerging knowledge in ecology, design, and artificial intelligence (AI) help? Current strategies to resolve this issue include designing objects that reproduce known features of natural forms. For instance, conservation practitioners seek to mimic the function of rapidly disappearing large old trees by augmenting utility poles with perch structures. Other approaches to restoring degraded ecosystems employ computational tools to capture information about natural forms and use such data to monitor remediation activities. At present, human-made replacements of habitat structures cannot reproduce significant features of complex natural forms while supporting efficient construction at large scales. We propose an AI agent that can synthesise simplified but ecologically meaningful representations of 3D forms that we define as visual abstractions. Previous research used AI to synthesise visual abstractions of 2D images. However, current applications of such techniques neither extend to 3D data nor engage with biological conservation or ecocentric design. This article investigates the potential of AI to support the design of artificial habitat structures and expand the scope of computation in this domain from data analysis to design synthesis. Our case study considers possible replacements of natural trees. The application implements a novel AI agent that designs by placing three-dimensional cubes – or voxels – in the digital space. The AI agent autonomously assesses the quality of the resulting visual abstractions by comparing them with three-dimensional representations of natural trees. We evaluate the forms produced by the AI agent by measuring relative complexity and features that are meaningful for arboreal wildlife. In conclusion, our study demonstrates that AI can generate design suggestions that are aligned with the preferences of arboreal wildlife and can support the development of artificial habitat structures. The bio-informed approach presented in this article can be useful in many situations where incomplete knowledge about complex natural forms can constrain the design and performance of human-made artefacts.
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ItemMore-than-human Infrastructure for Just Resilience: Learning from, Working with, and Designing for Bald Cypress Trees (Taxodium distichum) in the Mississippi River Delta(White Horse Press, 2021-09-01)Humans design infrastructure for human needs, with limited regard for the needs of nonhumans such as animals and plants. Humans also often fail to recognise nonhuman lifeforms such as trees as fellow engineers designers, or architects, even though the contribution of trees to ecosystem services is well established and their right to justice ought to be recognised. Studies have shown that flood-control infrastructure near the Mississippi River inadvertently left Southern Louisiana more vulnerable to coastal threats. We examine this characteristic outcome and identify infrastructural injustices in multispecies communities. Based on theories in philosophy and design supported by historical analyses, we defend the proposals to extend 1) the understanding of resilience to include more-than-human communities; and 2) the notion of justice to include non-human stakeholders. The reframing in more-than-human terms is already under way in a variety of disciplines. However, these efforts rarely extend into considerations of practical design and have attracted criticism for insufficient engagement with historical processes and the accumulations of power and responsibility. To illustrate these injustices, we trace the history of bald cypress trees (Taxodium distichum) in the Mississippi River Delta and show how infrastructure impacted the trees. This analysis demonstrates that designs that do not consider the needs of vulnerable stakeholders can cause harm in multispecies communities. In response, we propose that humans can work to improve infrastructural resilience by including humans and nonhumans as collaborators.
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ItemTowards More-than-Human Heritage: Arboreal Habitats as a Challenge for Heritage Preservation(Springer, 2020-03-25)Trees belong to humanity’s heritage, but they are more than that. Their loss, through catastrophic fires or under business-as-usual, is devastating to many forms of life. Moved by this fact, we begin with an assertion that heritage can have an active role in the design of future places. Written from within the field of architecture, this article focuses on structures that house life. Habitat features of trees and artificial replacement habitats for arboreal wildlife serve as concrete examples. Designs of such habitats need to reflect behaviours, traditions and cultures of birds, bats, and other animals. Our narrative highlights the nonhuman aspect of heritage, seeking to understand how nonhuman stakeholders can act as users and consumers of heritage and not only as its constituents. Our working definition states that more-than-human heritage encompasses tangible and intangible outcomes of historical processes that are of value to human as well as nonhuman stakeholders. From this basis, the article asks how the established notions of heritage can extend to include nonhuman concerns, artefacts, behaviours and cultures. As a possible answer to this question, the hypothesis tested here is that digital information can (1) contribute to the preservation of more-than-human heritage; and (2) illuminate its characteristics for future study and use. This article assesses the potential of three imaging technologies and considers the resulting data within the conceptual framework of more-than-human heritage, illuminating some of its concrete aspects and challenges.
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ItemPocketPedal: Beyond Disciplines with Mobile Games(AADR, 2016)