Growth pattern and cellular nitrogen and phosphorus contents of the dinoflagellate Peridinium penardii (Lemm.) Lemm. causing a freshwater red tide in a reservoir

Hydrobiologia ◽  
1995 ◽  
Vol 312 (2) ◽  
pp. 115-120 ◽  
Author(s):  
Zen'ichiro Kawabata ◽  
Yumiko Hirano
Keyword(s):  
Growth Pattern ◽  
Red Tide ◽  
Nitrogen And Phosphorus ◽  
Freshwater Red Tide

scholarly journals CONTROL OF PLUNGE FLOWS IN A RESERVOIR BY CURTAINS FOR COUNTERING FRESHWATER RED-TIDE BLOOMS

2002 ◽  
Vol 46 ◽  
pp. 1013-1018
Author(s):  
Juichiro AKIYAMA ◽  
Akhilesh K. Jha ◽  
Naoki YAMASHITA ◽  
Masaru URA
Keyword(s):  
Red Tide ◽  
Freshwater Red Tide

scholarly journals Active reconfiguration of cytoplasmic lipid droplets governs migration of nutrient-limited phytoplankton

2021 ◽  
Author(s):  
Anupam Sengupta ◽  
Jayabrata Dhar ◽  
Francesco Danza ◽  
Arkajyoti Ghoshal ◽  
Sarah Elisabeth Mueller ◽  
...  
Keyword(s):  
Lipid Droplets ◽  
Red Tide ◽  
Mechanical Energy ◽  
Optimal Growth ◽  
Active Role ◽  
Phosphorus Limitation ◽  
Vertical Movement ◽  
Nitrogen And Phosphorus ◽  
And Migration ◽  
Motile Species

As open oceans continue to warm, modified currents and enhanced stratification exacerbate nitrogen and phosphorus limitation, constraining primary production. The ability to migrate vertically bestows motile phytoplankton a crucial – albeit energetically expensive – advantage toward vertically redistributing for optimal growth, uptake and resource storage in nutrient-limited water columns. However, this traditional view discounts the possibility that phytoplankton migration may be actively selected by the storage dynamics when nutrients turn limiting. Here we report that storage and migration in phytoplankton are coupled traits, whereby motile species harness energy storing lipid droplets (LDs) to biomechanically regulate migration in nutrient limited settings. LDs grow and translocate directionally within the cytoplasm to accumulate below the cell nucleus, tuning the speed, trajectory and stability of swimming cells. Nutrient reincorporation reverses the LD translocation, restoring the homeostatic migratory traits measured in population-scale millifluidic experiments. Combining intracellular LD tracking and quantitative morphological analysis of red-tide forming alga, Heterosigma akashiwo , along with a model of cell mechanics, we discover that the size and spatial localization of growing LDs govern the ballisticity and orientational stability of migration. The strain-specific shifts in migration which we identify here are amenable to a selective emergence of mixotrophy in nutrient-limited phytoplankton. We rationalize these distinct behavioral acclimatization in an ecological context, relying on concomitant tracking of the photophysiology and reactive oxygen species (ROS) levels, and propose a dissipative mechanical energy budget for motile phytoplankton for alleviating nutrient limitation. The emergent resource acquisition strategies, enabled by distinct strain-specific migratory acclimatizing mechanisms, highlight the active role of the reconfigurable cytoplasmic LDs in vertical movement. By uncovering a mechanistic coupling between dynamics of intracellular changes to physiologically governed migration strategies, this work offers a tractable framework to delineate diverse strategies which phytoplankton may harness to maximize fitness and resource pool in nutrient-limited open oceans of the future.

scholarly journals Development of a boat equipped with UV lamps for suppression of freshwater red tide in a reservoir.

1993 ◽  
Vol 29 (2) ◽  
pp. 61-70 ◽  
Author(s):  
Yasushi ISERI ◽  
Zen'ichiro KAWABATA ◽  
Masahiko SASAKI
Keyword(s):  
Red Tide ◽  
Freshwater Red Tide ◽  
Uv Lamps

scholarly journals Effect of naturally collected bacteria on growth of Uroglena americana, a freshwater red tide Chrysophyceae.

1986 ◽  
Vol 52 (4) ◽  
pp. 691-696
Author(s):  
Bon Kimura ◽  
Yuzaburo Ishida ◽  
Hajime Kadota
Keyword(s):  
Red Tide ◽  
Freshwater Red Tide

scholarly journals A Freshwater “Red Tide” on Clear Lake, California1

1971 ◽  
Vol 16 (4) ◽  
pp. 684-689 ◽  
Author(s):  
Alexander J. Horne ◽  
Pavel Javornicky ◽  
Charles R. Goldman
Keyword(s):  
Red Tide ◽  
Clear Lake ◽  
Freshwater Red Tide
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