Limnology

Limnology is the study of inland aquatic ecosystems. The name comes from Ancient Greek words for "lake" and "study of." It looks at the biological, chemical, physical, and geological features of all kinds of water bodies, such as lakes, reservoirs, ponds, rivers, springs, streams, wetlands, and groundwater.

Water systems can be grouped into running water, like rivers, and standing water, like lakes. Scientists who study limnology also examine the area that drains into these water bodies and how water changes as it moves through the land.

A newer area of limnology, called landscape limnology, looks at how these water systems connect with the land around them. There is also a field called global limnology, which studies how inland waters affect the whole Earth system, including their role in global biogeochemical cycles.

Limnology is closely related to aquatic ecology and hydrobiology, which focus on living things in water and how they interact with their environment. While it often focuses on freshwater, limnology also studies salty lakes found indoors.

History

The word "limnology" was first used by François-Alphonse Forel, who studied Lake Geneva and helped start this field of science. Soon after, other scientists joined in, forming groups to share their findings. Over time, the study grew to include all kinds of water bodies, not just lakes. Many important researchers helped shape this science, especially in places like the University of Wisconsin-Madison.

General limnology

Physical properties

Main article: Physical limnology

Physical properties of water bodies are shaped by heat, currents, waves, and seasonal changes. The shape of a lake, river, or wetland depends on the land around it. Lakes are grouped by how they form and their depth, while rivers and streams change based on the rocks and soil they flow over.

Chemical properties

The chemicals in water come from rain, soil, rocks, and living things. Both natural processes and human activities change what’s in the water. For example, plants and tiny creatures can change the amount of oxygen and carbon dioxide in water.

Biological properties

Lakes are great for scientists to study because they have clear edges and are easy to visit. Scientists use a system to group lakes by how much life they support, from very rich to very poor.

Tropical limnology

Tropical limnology is a special area of study that looks at freshwater systems in tropical regions. These areas have warmer and more stable temperatures, more nutrients, and more complex ecological interactions compared to temperate regions. Tropical freshwater systems usually have higher biodiversity, and human activities can affect these systems more strongly. There are also important cultural and socioeconomic factors that influence how these water systems are used and managed.

Professional organizations

People who study limnology are called limnologists. They look at the features of freshwater places like lakes, rivers, streams, ponds, and wetlands. They might also study places with salty water that aren’t oceans, like the Great Salt Lake. There are many groups for these scientists, such as the Association for the Sciences of Limnology and Oceanography, the Asociación Ibérica de Limnología, the International Society of Limnology, the Polish Limnological Society, the Society of Canadian Aquatic Sciences, the Society for Freshwater Science, and the Freshwater Biological Association.