Chemosynthesis is a metabolic process that transfers carbon to the biosphere using reduced compounds. It is well recognised that chemosynthesis occurs in much of the ocean, but it is often thought to be a negligible process compared to photosynthesis. Here we propose that chemosynthesis is the underlying process governing primary production in much of the ocean and suggest that it extends to a much wider range of compounds, microorganisms, and ecosystems than previously thought. In turn, this process has had a central role in controlling marine biogeochemistry, ecology, and carbon budgets across the vast realms of the ocean, from the dawn of life to contemporary times.
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http://dx.doi.org/10.1016/j.tim.2023.11.013 | DOI Listing |
ISME J
January 2025
Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States.
Investigations of the metabolic capabilities of anaerobic protists advances our understanding of the evolution of eukaryotic life on Earth and for uncovering analogous extraterrestrial complex microbial life. Certain species of foraminiferan protists live in environments analogous to early Earth conditions when eukaryotes evolved, including sulfidic, anoxic and hypoxic sediment porewaters. Foraminifera are known to form symbioses as well as to harbor organelles from other eukaryotes (chloroplasts), possibly bolstering the host's independence from oxygen.
View Article and Find Full Text PDFThe deep sea, defined as ocean depths below 200 m, encompasses vast and largely unexplored habitats, such as abyssal plains, hydrothermal vents, cold seeps, and ocean trenches. This environment supports a remarkable diversity of life forms adapted to extreme conditions, including high pressure, low temperatures, and complete darkness. The Collection highlights the importance of these ecosystems and the unique adaptations of the organisms inhabiting these extreme environments, ranging from invertebrates like corals and sponges to diverse microbial communities.
View Article and Find Full Text PDFZookeys
October 2024
Division of Biomedical Research, Korea Research Institute Bioscience and Biotechnology, Daejeon 34141, Republic of Korea Division of Biomedical Research, Korea Research Institute Bioscience and Biotechnology Daejeon Republic of Korea.
Pettibone, 1985 is the most species-rich genus within the subfamily Lepidonotopodinae Pettibone, 1983, comprising 18 valid species from chemosynthesis-based ecosystems in the Pacific and Indian Oceans. Here, we report a new distributional record of Zhou, Wang, Zhang & Wang, 2018, at the hydrothermal vent sites on the northern Central Indian Ridge (nCIR). This record represents the northernmost occurrence of in the Indian Ocean.
View Article and Find Full Text PDFZookeys
October 2024
Department of Biology, Temple University, Philadelphia, PA, USA Temple University Philadelphia United States of America.
The ocean remains a reservoir of unknown biodiversity, particularly in the deep sea. Chemosynthesis-based ecosystems, such as hydrothermal vents and hydrocarbon seeps, host unique and diverse life forms that continue to be discovered and described. The present study focuses on patelliform gastropods (limpets) collected from Pacific Costa Rica Margin hydrocarbon seeps during three research cruises from 2017 to 2019.
View Article and Find Full Text PDFNew Phytol
November 2024
College of Pharmaceutical Sciences, Department of Pharmacy, National Yang Ming Chiao Tung University, Taipei, 112304, Taiwan.
Monolignol serves as the building blocks to constitute lignin, the second abundant polymer on Earth. Despite two decades of diligent efforts, complete identification of all metabolites in the currently proposed monolignol biosynthesis pathway has proven elusive. This limitation also hampers their potential application.
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