Lakes are large bodies of water that are surrounded by land and are generally larger than ponds. They are typically fed by rivers, streams, or groundwater, and may have outflows that drain into other bodies of water. Lakes are important ecosystems that support a variety of plant and animal species, and also provide important resources for human populations, such as drinking water, fishing, and recreational opportunities. Research in the field of lakes encompasses studies on their physical, chemical, and biological characteristics, as well as their ecological and environmental significance. Topics of research may include water quality, nutrient cycling, biodiversity, climate change impacts, and management strategies to protect and preserve these valuable water bodies.