Seconds To Hour Scale Photosynthetic Responses In Marine Microalgae
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Seconds To Hour Scale Photosynthetic Responses In Marine Microalgae
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Author : Samuel R. Laney
language : en
Publisher:
Release Date : 2006
Seconds To Hour Scale Photosynthetic Responses In Marine Microalgae written by Samuel R. Laney and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Photosynthesis categories.
Our view of phytoplankton has historically revolved around their inability to control their location in space. The term phytoplankton itself underscores this particular difference between phytoplankton and their sessile terrestrial counterparts. Yet there are other differences between land plants and the phytoplankton that are perhaps equally important, beyond this sessile-planktonic dichotomy, to their growth, survival, and productivity. For example, phytoplankton are microbes and thus are short-lived, with generational scales on the order of days or less. An intriguing question to ask is how today's pelagic ecology would differ, had this temporal difference between plants and phytoplankton been initially emphasized, perhaps by naming these microbes phytoephemera instead' This dissertation addresses certain aspects of the ecology of phytoplankton that result from their having short generational scales. Because they are so short lived, phytoplankton need to adjust their photosynthetic physiology to cope with more rapid changes in irradiance than may matter to longer-lived plants. Photoacclimation on the hours-plus time scales has been studied extensively in the phytoplankton, because its temporal scales match those of vertical mixing processes in the ocean. Yet most phytoplankton exhibit faster photosynthetic responses as well, down to the time scales of seconds. These photosynthetic responses have received considerably less attention in phytoplankton ecology. This dissertation specifically examines these rapid, seconds-to-hour scale photosynthetic responses in phytoplankton. First, the physiological bases of rapid photosynthetic regulation were examined using a numerical model that shows how specific physiological changes in phytoplankton photosystems either constrain or enhance light harvesting. This model is stochastic, and thus replicates certain nonlinear aspects of light harvesting better than equation-based analytical models. Also in this dissertation, a laboratory study is described that examined rapid photosynthetic regulation in three model phytoplankton. Results suggest that rapid photosynthetic regulation is not only constrained to higher eukaryotic phytoplankton, but also occurs in the two dominant marine photosynthetic prokaryotes, Synechococcus and Prochlorococcus. Finally, rapid photosynthetic responses were examined in field assemblages at Station ALOHA in the North Pacific. This ocean region experiences considerable cloud cover, which may result in a strong degree of rapid photosynthetic responses, even in near-surface assemblages.
The Alga Dunaliella
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Author : Ami Ben-Amotz
language : en
Publisher: CRC Press
Release Date : 2019-05-07
The Alga Dunaliella written by Ami Ben-Amotz and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05-07 with Science categories.
This volume presents a state-of-the art research in biochemistry, molecular biology and medical application. A glossary of specialized terms is appended. Each chapter is contributed by an expert or group of experts dedicated to increase our understanding of Dunaliella. All the chapters were reviewed internally by their colleagues, editors and external reviewers; this was followed by a final revision. The book provides a balanced multi-disciplinary communication and contributes to our understanding of this unique alga. It is addressed to graduate students and scientists as a summary of current thoughts on Dunaliella.
Photosynthesis In Algae
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Author : Anthony Larkum
language : en
Publisher: Springer Science & Business Media
Release Date : 2003-11-30
Photosynthesis In Algae written by Anthony Larkum and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-11-30 with Science categories.
This is a book for everyone interested in photosynthesis. The algae are a fascinating group of photosynthetic organisms ranging from some of the largest organisms on our planet down to the microscopic. The book introduces the reader to algal diversity as currently understood and then traces the photosynthetic structures and mechanisms that contribute so much to making the algae unique. The 19 articles are each written by experts in their area; ranging over all the essential aspects and making for a comprehensive coverage of the whole field. (Midwest).
The Response Of Microalgae And Plankton To Climate Change And Human Activities
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Author : Zhaohe Luo
language : en
Publisher: Frontiers Media SA
Release Date : 2024-02-07
The Response Of Microalgae And Plankton To Climate Change And Human Activities written by Zhaohe Luo and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-02-07 with Science categories.
The majority of global seafood production and mariculture activities take place in marine coastal water bodies, especially in areas of high primary productivity (from microalgae and plankton). This productivity sustains many forms of ecosystem services and promotes carbon dioxide absorption. However, climate change (ocean warming, acidification, oxygen loss, etc.) and anthropogenic disturbances (nutrients intrusion, aquaculture) have influenced the microalgae/plankton community assemblage and shifted it into a highly productive zone, causing a severe impact on the marine ecosystem, such as an increase in Harmful Algal Blooms, dead zone expansions, and coral-algal phase shifts. So far, there is still little knowledge on the mechanisms of microalgae/plankton community response to these changing environmental conditions. Harmful microalgae impair the marine ecosystem through the production of the so-called shellfish toxins, which cause shellfish contamination and poisoning to the vertebrates, including humans. In addition, some microalgae produce fish-killing toxins (ichthyotoxins), causing increasing damage to marine aquaculture. Besides that, the high productivity/bloom of microalgae in the water due to coastal eutrophication from anthropogenic activities is known to induce hypoxic-anoxic conditions causing a severe economic impact on aquaculture.
Antarctic Journal Of The United States
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Author :
language : en
Publisher:
Release Date : 1988
Antarctic Journal Of The United States written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Antarctica categories.
Microbial Response To A Rapidly Changing Marine Environment Global Warming And Ocean Acidification
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Author : Mi Sun Yun
language : en
Publisher: Frontiers Media SA
Release Date : 2021-09-24
Microbial Response To A Rapidly Changing Marine Environment Global Warming And Ocean Acidification written by Mi Sun Yun and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-24 with Science categories.
International Review Of Cytology
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Author :
language : en
Publisher: Academic Press
Release Date : 1989-05-01
International Review Of Cytology written by and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989-05-01 with Science categories.
International Review of Cytology
Energy Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1985
Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Power resources categories.
Manual On Harmful Marine Microalgae
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Author : Gustaaf M. Hallegraeff
language : en
Publisher:
Release Date : 1995
Manual On Harmful Marine Microalgae written by Gustaaf M. Hallegraeff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Algae categories.
Living Along Gradients Past Present Future
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Author : Ulrich Bathmann
language : en
Publisher: Frontiers Media SA
Release Date : 2020-02-24
Living Along Gradients Past Present Future written by Ulrich Bathmann and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-24 with categories.