While looking at different articles to do my tweets I can across this interesting one which talks about using roof gardens to help endangered species. Conservationist in Melbourne Australia created roof-top sanctuaries for threatened and endangered native plants. They found that by having these gardens high above the ground, it gave these plants a chance to survive. They did not have any predators like snails to eat there leaves and they also had better seed dispersal through the wind. There seeds were able to be taken to more remote places so that they can better establish themselves and have a better chance for survival. These plants also don’t have to compete with other plants that would be found on ground level so this also helps with better survival.
These threatened plants were not planted in soil but instead, using a substrate of volcanic rock to help improve drainage. They found that it was not necessary to water them as they got there water from the rainfall and would survive just fine. Conservationist did find however that not all the plants that were put in these roof-tops reacted in the same way. Some plants were able to disperse throughout the roof and be found in different locations and survive. Others remained in the same location and survived and wouldn’t spread beyond there original location. However there were still others that could not adapt to roof life and did not survive. Not all plants are able to withstand the conditions of being on a high roof like having little to no shade and strong winds most of the time.
This study is very interesting since it can really help to bring back threatened and endangered species of plants. Its fascinating to know the effects that location has on certain plants. If more countries participated in this it would be extremely helpful to restore that population of some of these native plants. It would also help with there dispersal to different area which could potentially help them survive better. Although they say that these green roofs should not be used as a primary solution, it is still a good alternative to helping establish more of a population of native plants in a given area. Green roofs have been used in different placed around the world, like in Toronto, But mainly for things like to improve air quality, add green spaced to city areas, reduce noise in building and provide insulation. It would be nice to see them incorporate this factor of using them to help native species to there surrounding areas as well.
using a substrate of volcanic rock to help improve drainage. They found that it was not necessary to water them as they got there water from the rainfall and would survive just fine.