Ecologists study how all living things interact with each other and the environment . Here are a few examples of how they can help combat climate change:
1) Nature-based Solutions: these are ways of working with nature to help humans . For example, planting and restoring forests can reduce soil erosion and landslides , reduce flood risk , reduce the impact of droughts [8,10], as well as taking up CO2 from the air . It’s the job of ecologists to work out how to protect and restore natural habitats in order to maximise the benefits they provide to humans [14,17].
2) Natural Capital: ecologists work with economists to put a financial value on the services that ecosystems provide for people – this is called ‘natural capital’ . For example, trees near rivers reduce erosion and improve water quality . In the countryside surrounding New York City about 20,000 landowners are paid to maintain forests in order to improve water quality [2,7]. New York City uses this unfiltered water as safe drinking water, meaning the cost of water treatment is avoided [15,16].
3) Modelling the potential responses of nature to climate change: we have a much better understanding of how the climate itself will change, than how nature will respond to it . We do, however, understand how some plants, animals and ecosystems respond to climate change. For example, as temperatures rise the Amazon rainforest will at some point cross a ‘tipping point’ where large parts of the forest will die and be replaced by savannah . This is predicted to happen at 3-5°C of global warming, or when 40% of the forest is cut down by humans [4,5]. Since the 1960s, about 20% of the Amazon has been cut down ; ecologists advise that we should halt deforestation and increase forest area in order to avoid crossing the tipping point .
There are many more possibilities!
 https://www.preprints.org/manuscript/201911.0275/v1 See: Box 1; Nature-based Solutions for climate change adaptation; Nature-based Solutions for climate change mitigation
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