scholarly journals Pelagic phytoplankton community change-points across nutrient gradients and in response to invasive mussels

2016 ◽  
Vol 62 (2) ◽  
pp. 366-381 ◽  
Author(s):  
Katya E. Kovalenko ◽  
Euan D. Reavie ◽  
J. David Allan ◽  
Meijun Cai ◽  
Sigrid D. P. Smith ◽  
...  
Keyword(s):  
Phytoplankton Community ◽  
Community Change ◽  
Change Points ◽  
Nutrient Gradients

Multiple Stable Configurations in Ordination of Phytoplankton Community Change Rates

Ecology ◽  
1977 ◽  
Vol 58 (5) ◽  
pp. 1076-1084 ◽  
Author(s):  
T. F. H. Allen ◽  
Steven M. Bartell ◽  
Joseph F. Koonce
Keyword(s):  
Phytoplankton Community ◽  
Community Change

Sequential rather than interactive effects of multiple stressors as drivers of phytoplankton community change in a large lake

2017 ◽  
Vol 62 (7) ◽  
pp. 1288-1302 ◽  
Author(s):  
Noreen E. Kelly ◽  
Joelle D. Young ◽  
Jennifer G. Winter ◽  
Michelle E. Palmer ◽  
Eleanor A. Stainsby ◽  
...  
Keyword(s):  
Phytoplankton Community ◽  
Multiple Stressors ◽  
Community Change ◽  
Interactive Effects ◽  
Large Lake

A biomarker record of temperature and phytoplankton community structure in the Okinawa Trough since the last glacial maximum

2017 ◽  
Vol 88 (1) ◽  
pp. 89-97 ◽  
Author(s):  
Jiaping Ruan ◽  
Yunping Xu ◽  
Su Ding ◽  
Yinghui Wang ◽  
Xinyu Zhang
Keyword(s):  
Phytoplankton Community ◽  
Okinawa Trough ◽  
Kuroshio Current ◽  
Community Change ◽  
Community Structures ◽  
Ocean Drilling Program ◽  
The Holocene ◽  
The Okinawa Trough ◽  
The Kuroshio ◽  
The Last Glacial

AbstractA variety of biomarkers were examined from Ocean Drilling Program Core 1202B to reconstruct temperature and phytoplankton community structures in the southern Okinawa Trough since 20 ka. Two molecular temperature proxies ( $${\rm U}_{{37}}^{{{\rm K}\prime}} $$ and TEX86) show 5°C to ~6°C warming during the glacial-interglacial transition. Prior to the Holocene, the $${\rm U}_{{37}}^{{{\rm K}\prime}} $$ -derived temperature was generally 1°C to 4°C higher than TEX86-derived temperature. This difference, however, was reduced to <1°C in the Holocene. Correspondingly, the phytoplankton biomarkers (e.g., C37:2 alkenone, brassicasterol, C30 1,15 diol, and dinosterol) indicate a shift of planktonic community structures, with coccolithophorids becoming more abundant in the Holocene at the expense of diatoms/dinoflagellates. This shift is related to the variability of nutrients, temperature, and salinity in the Okinawa Trough, likely controlled by the sea level and the intensity of the Kuroshio Current. The phytoplankton community change may have had profound implications for atmospheric CO2 fluctuations during glacial-interglacial cycles since diatoms and dinoflagellates have a higher efficiency of the biological pump than coccolithophorids.

scholarly journals Experimentally decomposing phytoplankton community change into ecological and evolutionary contributions

2021 ◽  
Author(s):  
Giannina S. I. Hattich ◽  
Luisa Listmann ◽  
Lynn Govaert ◽  
Christian Pansch ◽  
Thorsten B. H. Reusch ◽  
...  
Keyword(s):  
Phytoplankton Community ◽  
Community Change

scholarly journals Bio-optical evidence for increasing Phaeocystis dominance in the Barents Sea

2020 ◽  
Vol 378 (2181) ◽  
pp. 20190357 ◽  
Author(s):  
A. Orkney ◽  
T. Platt ◽  
B. E. Narayanaswamy ◽  
I. Kostakis ◽  
H. A. Bouman
Keyword(s):  
Community Composition ◽  
Phytoplankton Community ◽  
Barents Sea ◽  
Community Change ◽  
Phytoplankton Production ◽  
Ocean Colour ◽  
Chl A ◽  
Phytoplankton Community Composition ◽  
Functional Types

Increasing contributions of prymnesiophytes such as Phaeocystis pouchetii and Emiliania huxleyi to Barents Sea (BS) phytoplankton production have been suggested based on in situ observations of phytoplankton community composition, but the scattered and discontinuous nature of these records confounds simple inference of community change or its relationship to salient environmental variables. However, provided that meaningful assessments of phytoplankton community composition can be inferred based on their optical characteristics, ocean-colour records offer a potential means to develop a synthesis between sporadic in situ observations. Existing remote-sensing algorithms to retrieve phytoplankton functional types based on chlorophyll-a ( chl-a ) concentration or indices of pigment packaging may, however, fail to distinguish Phaeocystis from other blooms of phytoplankton with high pigment packaging, such as diatoms. We develop a novel algorithm to distinguish major phytoplankton functional types in the BS and apply it to the MODIS-Aqua ocean-colour record, to study changes in the composition of BS phytoplankton blooms in July, between 2002 and 2018, creating time series of the spatial distribution and intensity of coccolithophore, diatom and Phaeocystis blooms. We confirm a north-eastward expansion in coccolithophore bloom distribution, identified in previous studies, and suggest an inferred increase in chl-a concentrations, reported by previous researchers, may be partly explained by increasing frequencies of Phaeocystis blooms. This article is part of the theme issue ‘The changing Arctic Ocean: consequences for biological communities, biogeochemical processes and ecosystem functioning’.

Comparison of phytoplankton community structure in two tropical estuaries of East Coast of India

2020 ◽  
pp. 159-170
Author(s):  
Chumki Chowdhury
Keyword(s):  
Phytoplankton Community ◽  
East Coast ◽  
Inorganic Nitrogen ◽  
Community Change ◽  
Estuarine Water ◽  
East Coast Of India ◽  
Estuarine Waters ◽  
Dissolved Phosphorus ◽  
Dissolved Nitrogen ◽  
Dissolved Silicate

Phytoplankton community of two tropical river estuaries of the North-east coast of India was different due to dissolved nutrients concentration in those estuarine waters. The first study site was the Saptamukhi river estuary which is located in the Indian Sundarban (inside mangrove forest) and the second study site was Mahanadi estuary located in Orissa coast (adjacent to industrial and coastal fishing zone). The Saptamukhi estuary was mostly devoid of any anthropogenic influence and here the nutrient source was auto-generated. In Mahanadi estuarine water, the source of the major nutrients was industrial effluent and fishing waste. The Saptamukhi estuarine water had less dissolved phosphorus concentration but huge dissolved nitrogen available for phytoplankton uptake. A sufficient amount of dissolved silicate encouraged the diatom growth over other phytoplankton groups here. Due to the availability of the high amount of dissolved phosphorus and the low amount of dissolved nitrogen in the Mahanadi estuary the phytoplankton community was a mixed population of Bacillariophyceae, Cyanophyceae, Chlorophyceae and Dinophyceae and seasonal Chlorophycean bloom observed during the study period. In both the estuarine water primary productivity was high but the community respiration was higher and the estuaries were heterotrophic. Monsoonal runoff from land considerably changed the community in both estuarine water. Dissolved silicate concentration in both the estuarine water was sufficient for Diatom growth. Dissolve inorganic nitrogen and dissolved inorganic phosphate ratio played a major role for the community change of phytoplankton in two estuarine waters.

Phytoplankton Community Change of Lake Paldang by Increasing CO2 and Temperature during Spring Cold Water Season.

2013 ◽  
Vol 46 (4) ◽  
pp. 588-595
Author(s):  
Ka-Ram Lee ◽  
◽  
Eun-Ju Sung ◽  
Hye-Jin Park ◽  
Chae-Hong Park ◽  
...  
Keyword(s):  
Phytoplankton Community ◽  
Cold Water ◽  
Community Change
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