Autoimmune Disease Genetics. 1  1Division of Rheumatology and Department of Immunology, Mayo Clinic, 200 1st Street SW, Guggenheim Building 3-42, Rochester, MN 55905, USA. 2  2Laboratory of Molecular Medicine and Human Genetics, Department of Medicine, University of Crete, Heraklion, Greece.
Sunlight, soil, water, and pollution, for example, are all important abiotic factors of an environment that affect life. The biotic environment, on the other hand, is composed of all the living organisms in an ecosystem, and includes factors such as disease, predators, prey, and human activity.
These environmental factors are abiotic factors. When a variety of species are present in such an ecosystem, the consequent actions of these species can affect the lives of fellow species in the area, these factors are deemed biotic factors. This page will go into the abiotic factors of the freshwater environment which determine what sort of life would be suited to living (and adapting) to the conditions of the ecosystem.