Habitat and biodiversity conservation

The Garden Factory ('Tuinfabriek') is an exceptional urban agriculture project on a roof of the central station that aims at becoming the largest food-producing roof of the Netherlands. The project is a self-sustaining vegetable garden located on the roof of a busy mall in the centre of Utrecht (ref. 5). On the roof, citizens, students, company employees and schools work together to grow vegetables and keep bees and chicken. The Garden Factory reflects an ecological 'self-sustaining factory' as the chickens, worms and bees 'work' in the garden as being part of the decomposing system and pollination and a system is built for rainwater retention that allows for irrigation (ref. 1). Eating, composting, sowing, growing, harvesting, cooking form the production process of this Garden Factory (ref. 4).
The main elements of the roof garden are in place, such as the crop bins, the chicken coop and the decomposing machine are completed. However, it is an ongoing developing project as some elements are still in development stage such as some elements of the Soup Kitchen and the aim is to integrate the Garden Factory more with the central station shopping mall in multiple ways (ref. 1).

"This 26-hectare park, the largest in Clermont-Ferrand, offers a privileged view of the city. Several wooded areas serve as shelters for permanent and passing wildlife. For the last two years, gardeners in the park have no longer used pesticides to maintain Montjuzet Park, the effects are already measurable on the enrichment of flora and fauna." "During the development of the Parc Montjuzet, the choice was made to keep 9 hectares without intervention. These hectares could be a source of some ecological richness. Hives have been established near this area since 2009." (Ref. 1) This park has the Refuge LPO label. (Ref 2)

Warwickshire Wildlife Trust has completed an urban river restoration on the Guphill Brook that aims to restore the brook's natural features and enhance the surrounding habitat. "The project [is expected to] bring multiple benefits to diminishing wildlife and deprived local communities but also importantly to flood risk reduction, which is becoming ever more important with the increased negative effects of climate change." (Ref. 1)

The project tackles the habitat fragility of the Ligurian wetlands and the impact of a turtle species called Emys orbicularis in the Centa Piana river, the Vara and Magra rivers areas. The project focused on the restoration of the natural habitat, the eradication of invasive American species threatening the European turtle species and the assistance of local turtles reproduction and re-introduction in the wild. A large part of the project was conducted thanks to the participation of volunteers and large emphasis was given to education about environmental habitats protection. (1)

Tree heritage is an essential component of the urban environment in Clermont Ferrand. The city has a special plan for conserving the trees, proposing a tree charter (Ref 6) and made a major effort to extend its tree heritage. Different actions are undertaken by the city's council for conserving and planting trees around the city. For instance, the tramway has integrated the plantation of 1,400 trees and 140,000 shrubs (Ref. 1). In 2019 the city solicited a preliminary study on metropolitan trees for the development of a metropolitan tree charter (Ref 7).

The Willem Alexander Park is the first roof park of Utrecht and is built on a highway tunnel (the A2 highway) and includes meeting areas, sports and activities and a community garden that contributes to social cohesion. It also allows for cultural development by creating spaces for art and culture and includes a sustainable drainage system (ref. 1, 2). In addition, the Willem Alexanderpark is the first park in which almost two hectares consists of prairie plantings (ref. 2).
The park is intersected by the roads between the City road and Leeuwenstein-North. Each segment between the roads has its own thematic program, appropriate to the size and location in the urban context. The themes are:
– connect & meet
– art & culture
– sports & games
– nature & education
– food & drinks (ref. 4)

"The Coventry Water Vole Project aims to improve Coventry’s waterways and riverside habitat for water voles." "Water voles are Britain's most severely threatened mammal. Numbers have declined by as much as 95% in Warwickshire in recent years due to threats such as habitat loss, habitat fragmentation, poisoning, and predation.” "The Coventry Water Vole Project has focused on the control of the non-native and highly invasive plant Himalayan balsam, followed by replanting some riverside areas with native 'water vole friendly' wetland plants." (Ref. 1)

The park has been upgraded to include newly planted trees and shrubs, a meadow, children playgrounds, sitting areas for adult visitors, a wooden footbridge, and a water retention pond which collects rainwater from the roofs of nearby houses. The aim of the project was to establish and restore near-natural vegetation in the urbanized area, enhance biodiversity at the site, handle rainwater in a smart way, and provide a place for recreation (Ref. 2; Ref. 3; Ref 4). Additional restorations have included the creation of barbecue areas for gathering and cooking, and events are hosted at the space as well (Ref 8). Through voting, wider park expansions have also been approved (Ref 9).

The Kersentuin (Cherry Garden), an environmentally, socially and economically friendly community in Leidsche Rijn, an urbanization-from-scratch area in the west part of Utrecht, has been founded and developed by the residents themselves. The area is very popular and is seen as an interesting best practice in ideal green neighbourhood developments (ref. 4). It is a sustainable neighbourhood which integrates technical and social sustainability by building sustainable houses and creating public green spaces that promote biodiversity and social cohesion. The main characteristic of the Cherry Garden is the self-management of the green spaces which is achieved by gardening days. The project was innovative at the time of implementation and inspired many other projects (ref. 1).

The project focuses on the development of a sustainable, social and ecological park that promotes citizen participation (ref. 2), which is one of the largest city parks in the Netherlands. It combines various blue-green infrastructure elements (ref. 1). The park includes recreational facilities, a butterfly garden and special constructions that provide habitat for species. The Máximapark runs largely on volunteers and the citizen participation is the outstanding character of the development of the park (ref. 2).