processes, including water availability. We systematically reviewed the literature to determine how forests will affect river flow over long periods of time. Annual river flow declined significantly as forests aged, but the effect was smaller in drier years, suggesting that forests were reducing water use in response to availability. Forests planted on agricultural land also had smaller effects on river flow. In contrast to previous studies we found little evidence that the effects of forests on river flow will be reduced with age. These results highlight the importance of planning for reforestation at the landscape scale and taking local cultural and ecological contexts into account.
Bentley and Coomes (2020) Global Change Biology.