Ecology is a subject originally studies the animals living in the same natural environment. It has now developed to a science for the study of the relationship between organisms and their environment. The environment includes biotic environment and abiotic environment. Biotic environment is the relationship between different species, and the relationship between various individuals within a species. Abiotic environment includes the natural environment, such as soil, rock, water, air, temperature, humidity and so on.
Shēngtàixué, yuánběn shì yánjiū jūzhù zài tóngyī zìrán huánjìng zhōng de dòngwù de xuékē. Mùqián yǐjīng fāzhǎn wéi yánjiū shēngwù yǔ qí huánjìng zhījiān de xiānghù guānxì de kēxué. Huánjìng bāokuò shēngwù huánjìng hé fēi-shēngwù huánjìng. Shēngwù huánjìng shì zhǐ bùtóng wùzhǒng zhījiān hé yīgè wùzhǒng nèibù gège gètǐ zhījiān de guānxì. Fēi-shēngwù huánjìng bāokuò zìrán huánjìng, lìrú tǔrǎng, yánshí, shuǐ, kōngqì, wēndù, shīdù děng.