Certain invasive species thrive with warmer temperatures, so some invasive species die off naturally during the cold winter temperatures. However, with climate change, these invasive species are set to become widespread threats once again. A research team in Northern Ireland has predicted that waterweeds will become more widespread in the next 70 years. This will not only affect biodiversity, but also the economy, as waterways will be affected. The estimated annual cost of invasive species management to the UK is £1.8 billion, with £57 million of impact on waterways. With climate change, these numbers are expected to increase.