Adequate data is only available for about half of the global area of mangroves. However, of those areas for which data has been collected, the last 20 years have lost 35% of the mangrove formations. The United Nations Environment Program and Hamilton (2013), estimate that shrimp farming causes approximately a quarter of the destruction of mangrove forests. 10-25% of mangrove-dependent species are on the IUCN red list. Shrimp farming, salinization, dams, urbanization are the causes of their decline.[4] The disappearance of mangroves greatly increases coastal vulnerability to sea rise and tsunami danger, but also to the loss of coastal biodiversity. Mangroves offer significant value for local populations acting as a means of storm protection and playing an important role in the pristine functioning of the ecosystem. Furthermore, climate change with less rainfall also has a negative impact on mangrove growth and salinity, which concentration increases.[5]

[4] IUCN Mangroves: https://www.iucn.org/content/mangrove-forests-worldwide-decline

[5] Scientific Report (2018): https://www.nature.com/articles/s41598-018-31683-0