Taxonomy and diversity of marine microbes

Sobhana, K S (2024) Taxonomy and diversity of marine microbes. In: Training Manual on "Know Your Marine Biodiversity and Environment (MarBiE 1)". CMFRI Training Manual Series (42). ICAR- Central Marine Fisheries Research Institute, Kochi, pp. 6-13.

Text MarBiE-I_2024_Sobhana K S.pdf Download (243kB)

Abstract

Marine microbes form a diverse and complex group that plays a crucial role in the functioning of marine environments. They encompass a wide range of organisms, including bacteria, archaea, viruses, and microeukaryotes, each contributing uniquely to marine ecosystems' dynamics and functions.For the initial 2-3 billion years of planetary and biological evolution, microbes stood as the sole life forms. It is widely believed that life emerged in the oceans, making marine microorganisms the closest extant descendants of these primordial life forms. These early marine microbes played a crucial role in setting the stage for subsequent life forms. Around two billion years ago, photosynthetic marine microorganisms began generating oxygen, profoundly altering the chemical landscape in which plants, animals, and all other life evolved. This transition was monumental, as the generation of oxygen facilitated the development of aerobic life forms and shaped Earth's habitability. Beyond oxygen production, marine microbes continue to be indispensable. They act as microscopic factories, catalyzing essential chemical reactions within biogeochemical cycles. Their metabolisms, both aerobic and anaerobic, enable them to perform crucial steps within these cycles that other organisms cannot accomplish. The smooth operation of these biogeochemical cycles is vital for sustaining life on our planet. From nutrient cycling to carbon sequestration, marine microbes play a pivotal role in maintaining Earth's ecological balance. Without their contributions, the intricate web of life would cease to function effectively. Thus, acknowledging and understanding the significance of marine microbes is imperative for preserving the health and continuity of life on Earth.

Actions (login required)

View Item