scholarly journals Impact of antifouling booster biocides on single microalgal species and on a natural marine phytoplankton community

2005 ◽  
Vol 286 ◽  
pp. 1-12 ◽  
Author(s):  
RA Devilla ◽  
MT Brown ◽  
M Donkin ◽  
GA Tarran ◽  
J Aiken ◽  
...  
Keyword(s):  
Phytoplankton Community ◽  
Marine Phytoplankton ◽  
Microalgal Species

scholarly journals Predicting marine phytoplankton community size structure from empirical relationships with remotely sensed variables

2010 ◽  
Vol 33 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Carolyn Barnes ◽  
Xabier Irigoien ◽  
José A. A. De Oliveira ◽  
David Maxwell ◽  
Simon Jennings
Keyword(s):  
Phytoplankton Community ◽  
Size Structure ◽  
Remotely Sensed ◽  
Marine Phytoplankton ◽  
Community Size ◽  
Empirical Relationships

scholarly journals Monsoonal variation of the marine phytoplankton community in Kota Kinabalu, Sabah

2020 ◽  
Vol 37 ◽  
pp. 101326
Author(s):  
Brian Wei Khong Chong ◽  
Sandric Chee Yew Leong ◽  
Victor S. Kuwahara ◽  
Teruaki Yoshida
Keyword(s):  
Phytoplankton Community ◽  
Marine Phytoplankton

Role of Marine Phytoplankton in Determining the Chemical Speciation and Biogeochemical Cycling of Arsenic

1983 ◽  
Vol 40 (S2) ◽  
pp. s192-s196 ◽  
Author(s):  
James G. Sanders
Keyword(s):  
Primary Productivity ◽  
Chemical Speciation ◽  
Phytoplankton Community ◽  
Arsenic Speciation ◽  
Marine Phytoplankton ◽  
Phytoplankton Community Structure ◽  
Marine Systems ◽  
Geochemical Cycle ◽  
Arsenic Reduction

Biological mediation of arsenic speciation in marine systems is substantial and significant. Phytoplankton reduce and methylate arsenic, thus altering its geochemical cycle. Rates of arsenic reduction and methylation are proportional to the primary productivity of the ecosystem. In highly productive ecosystems, up to 80% of the total arsenic pool may undergo reduction and methylation. Experiments detailing rates of reduction have been performed in controlled marine ecosystems. Predictions of arsenic speciation based on these results agree well with actual samples taken from coastal areas. The form of reduced arsenic present varies between regions and temporally within regions, probably because of differences in phytoplankton community structure.

scholarly journals Responses of Marine Diatom-Dinoflagellate Competition to Multiple Environmental Drivers: Abundance, Elemental, and Biochemical Aspects

2021 ◽  
Vol 12 ◽  
Author(s):  
Rong Bi ◽  
Zhong Cao ◽  
Stefanie M. H. Ismar-Rebitz ◽  
Ulrich Sommer ◽  
Hailong Zhang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Algal Blooms ◽  
Phytoplankton Community ◽  
Additive Models ◽  
Prorocentrum Minimum ◽  
Marine Phytoplankton ◽  
Marine Diatom ◽  
Environmental Drivers ◽  
Nutrient Concentrations ◽  
High Nutrient

Ocean-related global change has strongly affected the competition between key marine phytoplankton groups, such as diatoms and dinoflagellates, especially with the deleterious consequency of the increasing occurrence of harmful algal blooms. The dominance of diatoms generally shifts toward that of dinoflagellates in response to increasing temperature and reduced nutrient availability; however, contradictory findings have also been observed in certain sea areas. A key challenge in ecology and biogeochemistry is to quantitatively determine the effects of multiple environmental factors on the diatom-dinoflagellate community and the related changes in elemental and biochemical composition. Here, we test the interplay between temperature, nutrient concentrations and their ratios on marine diatom-dinoflagellate competition and chemical composition using bi-algal competition experiments. The ubiquitous diatom Phaeodactylum tricornutum and dinoflagellate Prorocentrum minimum were cultivated semi-continuously, provided with different N and P concentrations (three different levels) and ratios (10:1, 24:1, and 63:1 molar ratios) under three temperatures (12, 18, and 24°C). The responses of diatom-dinoflagellate competition were analyzed by a Lotka-Volterra model and quantified by generalized linear mixed models (GLMMs) and generalized additive models (GAMs). The changes in nutrient concentrations significantly affected diatom-dinoflagellate competition, causing a competitive superiority of the diatoms at high nutrient concentrations, independent of temperature and N:P supply ratios. Interestingly, the effect amplitude of nutrient concentrations varied with different temperatures, showing a switch back toward a competitive superiority of the dinoflagellates at the highest temperature and at very high nutrient concentrations. The ratios of particulate organic nitrogen to phosphorus showed significant negative correlations with increasing diatoms/dinoflagellates ratios, while lipid biomarkers (fatty acids and sterols) correlated positively with increasing diatoms/dinoflagellates ratios over the entire ranges of temperature, N and P concentrations and N:P ratios. Our results indicate that the integration of phytoplankton community structure and chemical composition provides an important step forward to quantitatively understand and predict how phytoplankton community changes affect ecosystem functions and biogeochemical cycles in the ocean.

scholarly journals Harmful Marine Phytoplankton Community in Shirazi Creek, Kenya

2015 ◽  
Vol 10 (4) ◽  
pp. 266-275 ◽  
Author(s):  
Ogongo Bernard Ochieng ◽  
Musungu Kathleen K ◽  
Okumu Paul Sturcky
Keyword(s):  
Phytoplankton Community ◽  
Marine Phytoplankton
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