Many bacterioplankton species are autotrophic, and derive energy from either photosynthesis or chemosynthesis. Symbiotic chemosynthesis is an important process for hydrothermal vent communities. Producers provide their own energy through photosynthesis or chemosynthesis, plants are primary producers. Some microorganisms use chemosynthesis to produce biomass. These discoveries revealed deep-sea ecosystems that exist without sunlight and are based on chemosynthesis. Instead, the energy that the majority of organisms utilize comes from chemosynthesis. Organisms can also use chemosynthesis to attract prey or to attract a mate. This process is known as chemosynthesis or chemolithoautotrophy. This process of obtaining energy from chemicals is known as chemosynthesis. "Chemosynthesis" (2014) dealt with the grief of losing her health and accepting her cancer. This process, known as chemosynthesis, was recognized within the trophosome by Colleen Cavanaugh. Without such a proof-of-principle, explanations have tended to focus on chemosynthesis. Lithotrophs that can produce sugars through chemosynthesis make up the base of some food chains. Thus, chemosynthesis can be seen as a synonym of chemoautotrophy.