Wendy Atieno and Lis Mullin Bernhardt run the Ecosystem-based Adaptation Fund for the conservation, management and restoration of forests, grasslands, wetlands, mangroves or coral reefs. They have calls for proposals about once a year. USD 50,000 to USD 250,000 in grant funding.
It's a very competitive process, less than 2% of applicants are accepted, so it's worth listening here to see how your application can stand out.
Apply here: https://globalebafund.org/