In recent years, corporate perceptions of environmental sustainability have shifted from viewing it as a compliance burden to recognizing it as a strategic driver of innovation and competitive advantage, prompting a demand for effective sustainable design tools. Traditionally, tools like the Life Cycle Assessment (LCA) tool have been used to evaluate environmental impacts, yet their complexity, cost, and retrospective focus make them impractical for driving early-stage, disruptive innovation. Although biomimicry has emerged as a promising approach, adopting this novel interdisciplinary design practice within a corporate setting requires significant resources and time, disrupting established processes. Therefore, the biomimicry Life Principles (LPs) tool, a guiding sustainable design tool of the practice, provides an opportunity to lower the barrier to the entry of biomimicry within a corporate setting and potentially increases adoption of the broader practice. This comparative study seeks to explore the creative potential, and practical value of the biomimicry LPs tool compared to the traditional LCA approach while exploring the intrinsic motivation of R&D practitioners to implement these tools within a virtual product redesign workshop. To derive our conclusions, we employed a mixed-methods approach comprising a 23-item survey designed to assess practitioners’ intrinsic motivation and perceived practical value of the implemented tool alongside an external evaluation of the creativity of all generated design concepts. Together, these methods provide empirical evidence of the biomimicry LPs tool’s potential to enhance creative output, require minimal adoption effort, and act as a catalyst for whole-systems thinking in sustainable innovation. These findings offer compelling evidence to support their strategic addition to existing R&D toolkits and workflows. By highlighting the efficacy, accessibility, and intrinsic motivation of R&D professionals to use biomimicry LPs, the results underscore the viability of this tool to streamline the integration of biomimicry design thinking into real-world workflows. As such, they represent a pragmatic and scalable pathway to catalyze broader and deeper engagement with biomimicry across corporate contexts.

Claws are a common anatomical feature among limbed amniotes and contribute to a variety of functions including prey capture, locomotion, and attachment. Previous studies of both avian and non-avian reptiles have found correlations between habitat use and claw morphology, suggesting that variation in claw shape permits effective functioning in different microhabitats. How, or if, claw morphology influences attachment perfor-mance, particularly in isolation from the rest of the digit, has received little attention. To examine the effects of claw shape on frictional interactions, we isolated the claws of preserved specimens of Cuban knight anoles (Anolis equestris), quantified variation in claw morphology via geometric morphometrics, and measured friction on four different substrates that varied in surface roughness. We found that multiple aspects of claw shape influence frictional interactions, but only on substrates for which asperities are large enough to permit mechanical interlocking with the claw. On such substrates, the diameter of the claw's tip is the most important predictor of friction, with narrower claw tips inducing greater frictional interactions than wider ones. We also found that claw curvature, length, and depth influence friction, but that these relationships depend on the substrate's surface roughness. Our findings suggest that although claw shape plays a critical role in the effective clinging ability of lizards, its relative importance is dependent upon the substrate. Description of mechanical function, as well as ecological function, is critical for a holistic understanding of claw shape variation.

Threats to water security are on the rise globally. In the Great Lakes, major threats arise from watershed land-use practices promoting chemical and nutrient pollution. In the Maumee River Watershed (MRW), which discharges into the western basin of Lake Erie, nutrient inputs associated with harmful algal bloom events (HABs) have increased in frequency and severity over the last several decades. This includes forcing the historic shut down of the City of Toledo’s drinking water supply to 400,000 residents in 2014. Conditions which favor HABs did not appear overnight. We trace the history of land-use practices that transformed the structure and function of the MRW from a balanced system into a source of nutrient dynamics favoring HABs. Successful policy intervention must treat the MRW as a complex adaptive system operating at multiple scales at the intersection of agricultural practices and conflicting socioeconomic drivers, confounding traditional interventions that focus on single factors such as water quality or fertilizer use regulation. We conclude with three interventions that policymakers can employ to help tip the scales back into an ecologically balanced system.

Employees play a critical role in the success of corporate sustainability initiatives, yet sustained employee engagement is a constant challenge. The psychology literature states that to intrinsically motivate employees to engage in sustainability, there must be opportunity for employees to engage in practices that are directly relevant to their job duties. Traditional ad hoc initiatives such as Earth Week events, recycling challenges and so on, are not sufficient to derive this type of intrinsic motivation. Therefore, the goal of this study was to examine the psychological impact of a biomimicry sustainable innovation training program, to intrinsically motivate R&D employees to reconnect with nature and identify whether this promotes creative thinking and employee engagement. Due to COVID-19 restrictions, the current study conducted virtual workshops with R&D employees and demonstrated that biomimicry training was intrinsically motivating to employees and was valued as a practice that could be incorporated into R&D job duties. In conclusion, this study provides an adaptable procedural template for biomimicry training with a corporate audience. The results demonstrate a strong business case for organizations to experiment with biomimicry by illustrating its potential to create positive change across several business units beyond sustainable innovation to include human resources and sustainable marketing.

The roughness and wettability of surfaces exploited by free-ranging geckos can be highly variable and attachment to these substrates is context dependent (e.g., presence or absence of surface water). Although previous studies focus on the effect of these variables on attachment independently, geckos encounter a variety of conditions in their natural environment simultaneously. Here, we measured maximum shear load of geckos in air and when their toes were submerged underwater on substrates that varied in both surface roughness and wettability. Gecko attachment was greater in water than in air on smooth and rough hydrophobic substrates, and attachment to rough hydrophilic substrates did not differ when tested in air or water. Attachment varied considerably with surface roughness and characterization revealed that routine measurements of root mean square height can misrepresent the complexity of roughness, especially when measured with single instruments. We used surface roughness power spectra to characterize substrate surface roughness and examined the relationship between gecko attachment performance across the power spectra. This comparison suggests that roughness wavelengths less than 70 nm predominantly dictate gecko attachment. This study highlights the complexity of attachment in natural conditions and the need for comprehensive surface characterization when studying biological adhesive system performance.

The subdigital adhesive pads of Caribbean Anolis lizards are considered to be a key innovation that permits occupation of novel ecological niches. Although previous work has demonstrated that subdigital pad morphology and performance vary with habitat use, such investigations have only considered the macroscale aspects of these structures (e.g. pad area). The morphological agents of attachment, however, are arrays of hair-like fibres (setae) that terminate in an expanded tip (spatula) and have not been examined in a similar manner. Here we examine the setal morphology and setal field configuration of ecologically distinct species of the monophyletic Jamaican Anolis radiation from a functional and ecological perspective. We find that anoles occupying the highest perches possess greater setal densities and smaller spatulae than those exploiting lower perches. This finding is consistent with the concept of contact splitting, whereby subdivision of an adhesive area into smaller and more densely packed fibres results in an increase in adhesive performance. Micromorphological evidence also suggests that the biomechanics of adhesive locomotion may vary between Anolis ecomorphs. Our findings indicate that, in a similar fashion to macroscale features of the subdigital pad, its microstructure may vary in relation to performance and habitat use in Caribbean Anolis.

Gecko substrate use is likely influenced by adhesive performance, yet few studies have demonstrated this empirically. Herein, we examined the substrate use, adhesive performance and vertical clinging behaviour of Gekko gecko in captivity to investigate whether adhesive performance influences patterns of substrate use. We found that geckos were observed significantly more often on the substrate (glass) that elicited maximal adhesive performance relative to its availability within our experimental enclosures, indicating that geckos preferentially use substrates on which their adhesive performance is maximal. Our work here provides additional, yet crucial data establishing connections between adhesive performance and patterns of substrate use in captivity, suggesting the hypothesis that substrate preferences of free-ranging geckos should be correlated with adhesive performance. Clearly, further experimental and field research is necessary to test this hypothesis and identify other parameters that individually and/or collectively influence the habitat use of free-ranging geckos.

While it is generally accepted that van der Waals (vdW) forces govern gecko adhesion, several studies indicate contributions from non-vdW forces and highlight the importance of understanding the adhesive contact interface. Previous work hypothesized that the surface of gecko setae is hydrophobic, with nonpolar lipid tails exposed on the surface. However, direct experimental evidence supporting this hypothesis and its implications on the adhesion mechanism is lacking. Here, we investigate the sapphire-setae contact interface using interface-sensitive spectroscopy and provide direct evidence of the involvement of acid-base interactions between polar lipid head-groups exposed on the setal surface and sapphire. During detachment, a layer of unbound lipids is left as a footprint due to cohesive failure within the lipid layer, which, in turn, reduces wear to setae during high stress sliding. The absence of this lipid layer enhances adhesion, despite a small setal-substrate contact area. Our results show that gecko adhesion is not exclusively a vdW-based, residue-free system.

Spectroscopy Data: The spectroscopy data was collected by recording the SFG intensity as a function of infrared wavenumber for different interfaces, where the SFG intensity at each wavenumber was normalized by the IR power at the same wavenumber. The dataset collected was plotted as it is and fitted using a Lorentzian equation (fit lines shown in the Figures in the manuscript). Adhesion Data: Adhesion data was collected using a bi-axial friction cell, where the shear adhesion force was recorded as a function of time once the gecko setae start sliding on the substrate. The maximum recorded shear force was normalized by the lamellar area (calculated by analyzing pictures using ImageJ) to account for variation in size of lamella. Seven independent measurements were performed for both pristine and delipidized lamellae, which were then averaged to report the mean and standard error values listed in the paper.

The functional morphology of squamate fibrillar adhesive systems has been extensively investigated and has indirectly and directly influenced the design of synthetic counterparts. Not surprisingly, the structure and geometry of exemplar fibrils (setae) have been the subject of the bulk of the attention in such research, although variation in setal morphology along the length of subdigital adhesive pads has been implicated in the effective functioning of these systems. Adhesive setal field configuration has been described for several geckos, but that of the convergent Anolis lizards, comprised of morphologically simpler fibrils, remains largely unexplored. Here we examine setal morphology along the proximodistal axis of the digits of Anolis equestris and compare our findings to those for a model gecko, Gekko gecko . Consistent with previous work, we found that the setae of A. equestris are generally thinner, shorter, and present at higher densities than those of G. gecko and terminate in a single spatulate tip. Contrastingly, the setae of G. gecko are hierarchically branched in structure and carry hundreds of spatulate tips. Although the splitting of contacts into multiple smaller tips is predicted to increase the adhesive performance of a fiber compared to an unbranched one, we posited that the adhesive performance of G. gecko and A. equestris would be relatively similar when the configuration of the setal fields of each was accounted for. We found that, as in geckos, setal morphology of A. equestris follows a predictable pattern along the proximodistal axis of the pad, although there are several critical differences in the configuration of the setal fields of these two groups. Most notably, the pattern of variation in setal length of A. equestris is effectively opposite to that exhibited by G. gecko . This difference in clinal variation mirrors the difference in the direction in which the setal fields of anoles and geckos are peeled from the substrate, consistent with the hypothesis that biomechanical factors are the chief determinants of these patterns of variation. Future empirical work, however, is needed to validate this. Our findings introduce Anolis lizards as an additional source of inspiration for bio-inspired design and set the stage for comparative studies investigating the functional morphology of these convergent adhesive apparatuses. Such investigations will lead to an enhanced understanding of the interactions between form, function, and environment of fibril-based biological adhesive systems.

Background Invasive species are of substantial concern because they may threaten ecosystem stability and biodiversity worldwide. Not surprisingly, studies examining the drivers of biological invasion have increased in number over the past few decades in an effort to curtail invasive species success by way of informing management decisions. The common house gecko, Hemidactylus frenatus , has successfully invaded the Pacific islands where it appears to thrive in and dominate non-natural habitats offering high food availability (i.e., well-lit human dwellings) compared to native geckos. Previous work demonstrated that H. frenatus can outperform the native gecko, Lepidodactylus lugubris , in terms of maximal sprint speed on relatively simple planar surfaces (e.g., building walls). Lepidodactylus lugubris and other native geckos, however, may have superior locomotor performance in three-dimensional, structurally complex habitats. Results Here we compared the locomotor behaviour and exertion capacity of the native gecko, Gehyra oceanica , and the invasive gecko, Hemidactylus frenatus , on the island of Mo’orea, French Polynesia, on fabricated structures simulating structurally complex substrates. We found that the native gecko exhibits improved locomotor performance compared to the invasive gecko on structurally complex substrates. We also completed encounter surveys to document free-ranging habitat use and behaviour of these two species. We discovered that H. frenatus were more common in natural habitats than previously observed and used similar substrates as G. oceanica , although G. oceanica appeared to use substrates with greater perch heights (i.e., trees). Conclusions Our findings revealed that locomotor performance in complex environments may contribute to the previously observed habitat segregation between native and invasive Pacific island geckos. Furthermore, our locomotor and habitat use data are consistent with the hypothesis that G. oceanica may be resistant to invasion of H. frenatus in natural environments. Our study calls for more detailed ecophysiological and ecomorphological studies of both native and invasive Pacific gecko species.

Funding information The University of Akron Integrated Bioscience Ph.D. Program Abstract The remarkable properties of the gecko adhesive system have been intensively studied. Although many gecko‐inspired synthetic adhesives have been designed and fabricated, few manage to capture the multifunctionality of the natural system. Analogous to previously documented self‐cleaning, recent work demonstrated that gecko toe pads dry when geckos take steps on dry substrates (i.e., self‐drying). Whether digital hyperextension (DH), the distal to proximal peeling of gecko toe pads, is involved in the self‐drying process, had not been determined. Here, the effect of DH on self‐drying was isolated by preventing DH from occurring during normal walking locomotion of Gekko gecko after toe pads were wetted. Our initial analysis revealed low statistical power, so we increased our sample size to determine the robustness of our result. We found that neither DH nor the DH–substrate interaction had a significant effect on the maximum shear adhesive force after self‐drying. These results suggest that DH is not necessary for self‐drying to occur. Interestingly, however, we discovered that shear adhesion is higher on a surface tending hydrophobic compared to a hydrophilic surface, demonstrating that gecko adhesion is sensitive to substrate wettability during the subdigital pad drying process. Furthermore, we also observed frequent damage to the adhesive system during shear adhesion testing post‐drying, indicating that water may compromise the structural integrity of the adhesive structures. Our results not only have behavioral and ecological implications for free‐ranging geckos but also have the potential to influence the design and fabrication of gecko‐inspired synthetic adhesives that can regain adhesion after fouling with water.

The remarkable ability of geckos to adhere to a wide-variety of surfaces has served as an inspiration for hundreds of studies spanning the disciplines of biomechanics, functional morphology, ecology, evolution, materials science, chemistry, and physics. The multifunctional properties (e.g., self-cleaning, controlled releasability, reversibility) and adhesive performance of the gekkotan adhesive system have motivated researchers to design and fabricate gecko-inspired synthetic adhesives of various materials and properties. However, many challenges remain in our attempts to replicate the properties and performance of this complex, hierarchical fibrillar adhesive system, stemming from fundamental, but unanswered, questions about how fibrillar adhesion operates. Such questions involve the role of fibril morphology in adhesive performance and how the gekkotan adhesive apparatus is utilized in nature. Similar fibrillar adhesive systems have, however, evolved independently in two other lineages of lizards (anoles and skinks) and potentially provide alternate avenues for addressing these fundamental questions. Anoles are the most promising group because they have been the subject of intensive ecological and evolutionary study for several decades, are highly speciose, and indeed are advocated as squamate model organisms. Surprisingly, however, comparatively little is known about the morphology, performance, and properties of their convergently-evolved adhesive arrays. Although many researchers consider the performance of the adhesive system of Anolis lizards to be less accomplished than its gekkotan counterpart, we argue here that Anolis lizards are prime candidates for exploring the fundamentals of fibrillar adhesion. Studying the less complex morphology of the anoline adhesive system has the potential to enhance our understanding of fibril morphology and its relationship to the multifunctional performance of fibrillar adhesive systems. Furthermore, the abundance of existing data on the ecology and evolution of anoles provides an excellent framework for testing hypotheses about the influence of habitat microstructure on the performance, behavior, and evolution of lizards with subdigital adhesive pads.