The Department of Conservation defines ecological restoration as “the process of re-establishing a self-sustaining habitat or ecosystem similar to what is likely to have existed prior to human contact, and the reintroduction of native fauna and flora and the eradication or control of pests.”
Ecological restoration usually involves a variety of projects such as
● reforestation and revegetation using indigenous, native species of plants, trees and bushes
● removal of weeds and other non-native species
● habitat and range improvements
Ecological restoration is often implemented in rural communities where it’s possible to restore large areas and the benefits of ecological restoration are immediately visible. However, it’s seldom implemented in urban areas due to space and logistical constraints. There’s also the issue of how viable restoration efforts would be in an urban setting with factors like human activity and climate change come into play.
But ecological restoration is exactly what urban areas need. Eco-cities that co-exist with the natural ecosystem tend to be healthier and more sustainable. It is a perfect system for urban areas because it:
1. consumes fewer resources,
2. produces less waste,
3. is powered by sustainable resources,
4. mitigates the impact of climate change and
5. provides a level of sufficiency that protects urban dwellers from catastrophic events.
Urban ecological restoration is challenging but not impossible. The goal with urban ecological restoration is to design a city that caters to sustainable population and ecological growth. It’s not just about turning a city greener. It’s about making a city and all its residents healthier, allowing both native plants and city dwellers to thrive even in an urban environment.
In Auckland, for example, part of the challenge of making their city among the greenest in the world is the increasing number of inhabitants in the area, enabling Chief Sustainability Officer John Mauro to quip recently, “If the city is going to be a desirable place to live, we need to not only have housing that’s affordable and easy transport connections, we need to have green space.” It is only then that we consider human activity with ecological restoration that development will take place.
Urban ecological restoration doesn’t have to be done in one massive step. It can be done incrementally in a number of ways:
● Roads – Instead of emphasizing high volume roads with equally high speed arterials, they can be toned down, converting into a two-way road but widening certain footpaths. They can be converted into a streetscape along parks and cafes, encouraging more public transport and pedestrian traffic.
● Residential areas – Subdivisions with cabbage trees and other native plants as vegetation. A barren piece of land in the middle of the subdivision can be used as recreation area like a mini park or urban garden with trees planted along the road for some shade. Condominium units can provide spaces for window gardens and rooftop mini-forests. Rooftops and roof decks can be used as small scale solar or wind farms to supplement the city’s energy supply.
● Parks – Small wetlands inside parks can be developed and restored into fishing or ornamental ponds. Mini gardens, native plant nurseries, and habitats for wild animals as well as observatories are installed.
● Office buildings – For new buildings, they should conform with LEED standards. For older buildings, mini gardens can be built just outside the lobby and along walkways. For all building, provisions for sustainable energy and wastewater management should be provided by building owners.
● Urban farms – A large native plant nursery, greenhouse gardens as well as conservatories of rare exotic plant and animal species can be found in urban farms.
This would be a daunting task for any city but with the right planning, implementation and resource, urban ecological restoration can be done effectively and efficiently. With public support, government initiative, and the expertise of partners like Rural Design, it’s possible to create a healthy green cities all over the country within our lifetime