High-performance ecosystems: the cornerstone of nature positive urban spaces
Building on years of expertise, AECOM’s design framework optimizes ecosystem services across diverse project settings, ranging from bustling cities to serene natural habitats.
The climate crisis and biodiversity loss are the two biggest global threats today. At COP15 in 2022, it was estimated that nature conservation would require annual funding of US$200 billion, with 196 nations committing to conserve 30% of the earth’s oceans, lands and freshwater ecosystems by 2030. Less than two years later, COP16 concluded that we are far short of the required funding levels to halt biodiversity declines, and new financial mechanisms are failing to gain traction. This reality check underscores the urgent need to intensify our efforts to protect and restore our ecosystems.
Balancing development and conservation through high-performance ecosystems
In the Natural Capital Manifesto, AECOM outlined innovative strategies to create a new asset class centered around nature, focusing on quantifying and rewarding investments in conservation initiatives. This approach integrates natural capital with traditional financial systems, fostering economies that benefit both people and the environment. It begins with the creation of high-performance ecosystems.
A high-performance ecosystem is any nature-based solution or ecosystem-based approach that is planned, designed and managed to optimize ecosystem service delivery. By enabling high-performance, we can amplify the environmental benefits of all projects, applicable to both infrastructure systems in urban centres and natural habitats in the hinterlands.
Drawing on best practices from AECOM’s multi-disciplinary experts, the Design Principles for High-performance Ecosystems is a comprehensive framework. It guides the design and management of ecosystems to deliver maximum environmental benefits. The framework features eight principles, anchored on three foundations:
Physical complexity supports higher biodiversity
Compositional richness in nature’s building blocks, whether natural or man-made, plays a crucial role in shaping diverse and functional ecosystems. Physically complex habitats, with varied structures and layers, tend to support higher biodiversity by offering a greater variety of niches and microhabitats that support different species. For instance, in forest landscapes, structural diversity is largely provided by the trees and plants. Varying tree densities, age classes, and species compositions enhance the complexity of forest ecosystems, creating niches for different organisms to thrive.
The same approaches used in natural habitats can also be applied in urban settings by maximizing compositional diversity through integrating various habitat elements and native plants. In urban parks, for example, diversity can be promoted by using plant species that flower and fruit throughout the year, supporting local wildlife. Incorporating pollinator-friendly plant species enhances biodiversity, supports essential ecosystem services, and helps maintain healthy urban ecosystems.
Integrating nature-inspired features into urban design
Nature-inspired landscape features can also enhance urban biodiversity. For instance, gabion walls made from wire cages filled with rocks provide structural support and create habitats for insects, amphibians, reptiles, and plants. The eco-shoreline, such as the one adopted by AECOM at Tung Chung East in Hong Kong, is a nature-based solution that enhances surface complexity in intertidal zones. By providing different niches that respond to physical stresses (e.g. heat and desiccation) and biological stresses (e.g. competition and predation), biodiversity is enhanced, from algae to invertebrates to fish. Elsewhere, concrete printing has been used to mimic the micro scale complexity of sub-tidal reefs.
At a global scale, creating landscapes that promote biodiversity brings us closer to nature positivity. Larger areas of high-quality habitats enhance nature’s resilience to climate-related changes and human disturbances, helping to secure the viability of threatened species and habitats. At the project level, key measures to consider in designing resilient ecosystems include using species tolerant of future temperature variations and incorporating those capable of withstanding flood and drought conditions.
High-performance ecosystems: prioritizing people and planet
While development and conservation are often seen as opposing forces, this need not be the case. From the expansive macro scale to the intricate micro scale—such as the concrete textures applied in the eco-shoreline—embracing complexity can deliver inspiring and sustainable solutions that enhance the quality of life for both people and our planet.
Despite international efforts, progress on financing nature-positive initiatives remains uncertain. This uncertainty presents an opportunity for the private sector, governments, and organizations to step in and leverage green finance to develop ambitious nature-based solutions. Creating high-performance ecosystems is a crucial first step in building a common ground between conservation actions and the commercial world.
To read the full publication on AECOM’s Design Principles for High Performance Ecosystems, click here.