The food web in your pond or lake may seem simple, but there’s probably more going on than you may realize at first glance. The base of the food web is a single-celled algae called phytoplankton. Phytoplankton is not only a main contributor of oxygen...

During the winter months, open water and circulation from winter winds promote relatively high and stable oxygen levels. Oxygen dissolves more readily in cold water. It is worth noting the pond simply requires less oxygen in the winter, because metab...