Bio-Filtration: How Native Grasses Cleanse Stormwater
In our mission to protect and preserve the natural resources that surround us, it’s important to understand that even small, sustainable actions can have a significant impact. By embracing practices such as planting native species and reducing turf areas, we actively contribute to the safeguarding of our local rivers and springs. Native landscape grasses like Muhly, Sand Cordgrass, and Fakahatchee play a vital role in maintaining the cleanliness of stormwater. Through a process called bio-filtration, these grasses act as natural filters, absorbing pollutants and nutrients as water passes through their blades. This remarkable ecosystem service highlights the potential of our urban landscapes to be more than just visually appealing; they can become protectors of our natural resources.
Bio-filtration holds immense promise in mitigating the impact of stormwater runoff on our local water bodies. As water flows through the blades of native grasses, it undergoes a cleansing process where pollutants, heavy metals, and excess nutrients are absorbed into the plants’ biomass. This natural filtration mechanism helps prevent these contaminants from reaching our rivers and springs, thereby preserving their ecological health.
Native grasses are the unsung heroes working silently underground with their roots. Their deep roots have the capacity to filter water effectively. When we consider the abundance of impervious surfaces in our towns—roofs, roadways, parking lots, driveways, sidewalks, patios, and tennis courts—we realize that these surfaces contribute to runoff that carries chemicals, oils, and other toxic pollutants into our water sources. However, by increasing the presence of parks and open grass areas with native grasses, we enhance the opportunity to filter this runoff. While the filtration process takes time and is not instantaneous, innovative techniques such as bioswales can capture and filter water, leading to storm drains. This approach significantly increases the filtration of harmful substances and contributes to a healthier environment.
Native grasses offer more than just water conservation and reduced use of herbicides and fertilizers. They provide additional benefits within urban environments, including enhancing the overall aesthetic appeal, creating green spaces, promoting biodiversity and habitat, and offering microclimate benefits. These advantages have substantial positive impacts on human health and economic well-being.
It is essential to recognize that landscapes can serve a greater purpose beyond their visual appeal. They have the potential to become catalysts for change and guardians of our natural resources. This understanding forms the foundation of our unwavering commitment to promoting the adoption of sustainable landscapes. By reducing or eliminating irrigation, synthetic fertilizers, and pesticides, we maximize the ecosystem services provided by our landscapes. Through deliberate choices and environmentally responsible practices, we have the opportunity to create vibrant, resilient, and sustainable urban environments that benefit both nature and humanity.