In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are amount of water and temperature predators and parasites temperature and salinity wind and amount of water competitors and predators

In most cases, the two major climatic factors affecting the distribution of organisms in terrestrial ecosystems are the amount of water and temperatures. Terrestrial ecosystems rely on the sun's energy to support the growth and metabolism of the organisms. Plants use the sunlight, then they supply the organisms that are higher up the food chain with energy and the structural buildings blocks of life. Water is also essential for the survival of these organisms.