Accessibility of water and light-growth of a population

Question

How do the accessibility of water and light and the climate influence the growth of a population?

Answer 1

The accessibility of water and light and the climate are abiotic factors which limit growth of a population. Since producers are accountable for synthesis of organic material transferred along food chains of an ecosystem, water and light influence the accessibility of food and a population can’t grow beyond the number of individuals the environment is capable to feed. For illustration, in desert, the biomass is relatively small and populations which live in this ecosystem are smaller (compared to same species in environments with large accessible biomass). The climate, comprising the temperature, influences population growth since excessive change in this factor, as the occurrence of droughts or floods might cause significant population decline; small climatic changes can also change the photosynthesis rate and reduce accessibility of food in ecosystem.