社区在生物学上被定义为一组相互作用的群体。我们可以用这个词来描述一个社区内存在的突出物种，比如，一种生活在山涧河岸的蝾螈，或者蝾螈群落茁壮成长的物理环境 – 俗称它的栖息地 – 在这种情况下，一个沿岸社区。其他的例子是沙漠社区，池塘社区或落叶林社区。正如生物体具有使其独特的特定属性，例如大小，体重，年龄，性别等，社区也是如此。在进行研究时，生物学家和其他科学家会注意到以下特征：多样性或社区中的物种数量。社区也可以被描述为整体密集或人口稀少。相对丰度，指社区内物种的丰富度或缺乏量，与居住在该群落中的所有其他物种的丰度有关。稳定性，或社区随着时间的推移变化或保持静止的程度。这些变化可能由于内部或外部因素或两者的组合而发生。尽管影响环境的变化，社区成员仍然可以保持稳定和茁壮成长，或者即使是最轻微的变化，他们也可以保持极其敏感。
A community is defined biologically as a set of interacting populations. We can use the word to both describe the prominent species that exists within a community, say, a certain kind of salamander that lives along the banks of a mountain stream, or the physical environment in which that community of salamanders thrives—commonly known as its habitat—in this case, a riparian community. Additional examples would be a desert community, a pond community, or a deciduous forest community. Just as organisms have specific properties that make them unique, such as size, weight, age, sex, and so forth, so too do communities. When conducting their studies, biologists and other scientists make note of the following characteristics: Diversity, or the number of species in the community. A community can also be described as being either densely or sparsely populated, as a whole. Relative abundance, which refers to the abundance—or lack of thereof—of a species within a community with respect to the abundance of all the other species living in that community. Stability, or how much a community changes or remains static over time. These changes can occur because of internal or external factors, or a combination of both. The members of the community can remain stable and thrive in spite of the changes impacting their environment, or they can be ultra sensitive to even the slightest changes.