Biotic components are the living things that shape an ecosystem. Biotic components usually include: Producers, i.e. autotrophs: e.g. plants, they convert the energy [from photosynthesis (the transfer of sunlight, water, and carbon dioxide into energy), or other sources such as hydro thermal vents] into food. read more
Biotic factors may include things like predation, disease, competition, parasitism, consumption, and symbiosis. And certainly abiotic factors, like the weather, can also impact living things. The interplay of all the biotic and abiotic factors in an ecosystem determines the carrying capacity of that ecosystem for any particular species. read more