Do Lakes Breathe? The Role of Lakes in the Global Carbon Cycle and Climate

Lakes may seem quiet and still, but they host bustling ecosystems where organisms produce and consume greenhouse gases, influencing Earth’s climate and the global carbon cycle. Carbon is present in the cells of every organism and in two powerful greenhouse gases that trap heat in the atmosphere: carbon dioxide and methane. In lakes, tiny organisms called phytoplankton use sunlight and carbon dioxide for photosynthesis, generating oxygen and other substances crucial for lake life. Many other lake organisms produce carbon dioxide and some also produce methane. So, just like humans do when they exhale, lakes also emit carbon; but due to human interference, lakes are emitting more carbon than they would naturally. Understanding these processes and reducing human impact is vital for preserving lakes and slowing climate change. Lakes are not just beautiful landscapes; they are essential components of Earth’s carbon cycle and climate!