What factors contribute to coastal erosion and how can it be managed?
Coastal erosion is primarily caused by wave action, sea-level rise, storms, and human activities like construction and dredging. It can be managed through hard engineering (seawalls, groynes), soft engineering (beach nourishment, dune restoration), and sustainable practices (coastal zoning, managed retreat).
How do human activities impact coastal ecosystems?
Human activities such as pollution, overfishing, coastal development, and climate change negatively impact coastal ecosystems by degrading habitats, altering food webs, increasing erosion, and introducing harmful substances. This leads to a decline in biodiversity, reduced ecosystem services, and increased vulnerability to environmental changes.
What is the importance of coastal wetlands in maintaining biodiversity?
Coastal wetlands are vital for biodiversity as they provide critical habitats for numerous species, including fish, birds, and invertebrates. They serve as nurseries for marine life, breeding grounds for birds, and support unique plant species. Additionally, they offer ecosystem services like water filtration and carbon sequestration, crucial for climate regulation.
How do climate change and sea-level rise affect coastal areas?
Climate change and sea-level rise lead to increased coastal erosion, flooding, and habitat loss. They threaten biodiversity, infrastructure, and human settlements in coastal areas, intensifying storm surges and salinization of freshwater resources. Coastal ecosystems and economies reliant on coastal resources face heightened vulnerabilities as a result.
What methods are used to protect and restore coastal habitats?
Common methods include beach nourishment, constructing seawalls or living shorelines, restoring wetlands and mangroves, implementing marine protected areas, and removing invasive species. These approaches aim at stabilizing coastlines, enhancing biodiversity, and improving resilience against climate change impacts.