What topics might the biologist study at the community level of organization?

Answer 1

Structural Engineering, Metallurgy and Architecture, if switching careers to something far more practical...

Otherwise try cytology, pathology, physiology as generalisations, or zoology, palaentology, herpatology, entemology as different branches of Biology that deal with specific areas. Suggest you check the definitions to see which applies to your question most closely.

Answer 2

Communities are groups of species that share a common geographic location. The question is thus asking what things about that community would be worthwhile for a scientist to study. One example might be the interactions between the organisms within a community that lead to stabilization of the community as a whole. For more specific ideas, you might try researching "keystone species", which are species that link many aspects of a community together.

Answer 3

molecules , cells , organisms , populations of a single organism , communities of populations living in the same area, and the biosphere.