scholarly journals A Satellite Assessment of Environmental Controls of Phytoplankton Community Size Structure

2019 ◽  
Author(s):  
Colleen B. Mouw ◽  
Audrey B. Ciochetto ◽  
James A. Yoder
Keyword(s):  
Phytoplankton Community ◽  
Size Structure ◽  
Community Size ◽  
Environmental Controls

Effect of phytoplankton community size structure on remote-sensing reflectance and chlorophyll a products

2020 ◽  
Vol 211 ◽  
pp. 103400 ◽  
Author(s):  
Monika Soja-Woźniak ◽  
Leonardo Laiolo ◽  
Mark E. Baird ◽  
Richard Matear ◽  
Lesley Clementson ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Chlorophyll A ◽  
Phytoplankton Community ◽  
Size Structure ◽  
Community Size ◽  
Remote Sensing Reflectance

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

Phytoplankton community size structure, primary production and copepod production in a subtropical coastal inlet in Hong Kong

2013 ◽  
Vol 93 (8) ◽  
pp. 2155-2166 ◽  
Author(s):  
Alle A.Y. Lie ◽  
Lik Chi Wong ◽  
C. Kim Wong
Keyword(s):  
Hong Kong ◽  
Primary Production ◽  
Phytoplankton Community ◽  
Size Structure ◽  
Net Primary Production ◽  
Size Fraction ◽  
Zooplankton Community ◽  
Community Size ◽  
Phytoplankton Primary Production ◽  
Tolo Harbour

Phytoplankton primary production and copepod production, and the size composition of the phytoplankton community in Tolo Harbour, a semi-enclosed bay in north-eastern Hong Kong, were studied from February 2008 to March 2009. Chlorophyll-a (Chl a) concentrations decreased from an average of 9.07 µg l−1 in the inner part of the bay to 3.07 µg l−1 at the mouth of the bay. In terms of contribution to total Chl a biomass, the >20 µm size fraction dominated the phytoplankton community. The zooplankton community in Tolo Harbour was dominated by small copepods, with cephalothorax length ranging from ~0.3 to 0.4 mm, and the density of copepods decreased from ~15,000 ind.m−3 in the inner part of the bay to ~9,700 ind.m−3 at the mouth of the bay. Depth-integrated net primary production in Tolo Harbour was high, ranging from 0.34 to 10.40 g C m−2 day−1, with an overall mean of 2.64 g C m−2 day−1. In contrast, copepod production was low, ranging from 0.19 to 16.64 mg C m−3 day−1, with an overall mean of 2.73 mg C m−3 day−1. The low transfer efficiency of 1.4% between phytoplankton primary production and copepod secondary production suggests that the large phytoplankton was inefficiently grazed by the small copepods in Tolo Harbour.

scholarly journals Influence of timing of sea ice retreat on phytoplankton size during marginal ice zone bloom period on the Chukchi and Bering shelves

2016 ◽  
Vol 13 (1) ◽  
pp. 115-131 ◽  
Author(s):  
A. Fujiwara ◽  
T. Hirawake ◽  
K. Suzuki ◽  
L. Eisner ◽  
I. Imai ◽  
...  
Keyword(s):  
Sea Ice ◽  
Phytoplankton Community ◽  
Size Structure ◽  
Negative Relationship ◽  
Community Size ◽  
Chl A ◽  
Bloom Period ◽  
Ice Retreat ◽  
Phytoplankton Size ◽  
Sea Ice Retreat

Abstract. The size structure and biomass of a phytoplankton community during the spring bloom period can affect the energy use of higher-trophic-level organisms through the predator–prey body size relationships. The timing of the sea ice retreat (TSR) also plays a crucial role in the seasonally ice-covered marine ecosystem, because it is tightly coupled with the timing of the spring bloom. Thus, it is important to monitor the temporal and spatial distributions of a phytoplankton community size structure. Prior to this study, an ocean colour algorithm was developed to derive phytoplankton size index FL, which is defined as the ratio of chlorophyll a (chl a) derived from cells larger than 5 µm to the total chl a, using satellite remote sensing for the Chukchi and Bering shelves. Using this method, we analysed the pixel-by-pixel relationships between FL during the marginal ice zone (MIZ) bloom period and TSR over the period of 1998–2013. The influences of the TSR on the sea surface temperature (SST) and changes in ocean heat content (ΔOHC) during the MIZ bloom period were also investigated. A significant negative relationship between FL and the TSR was widely found in the shelf region during the MIZ bloom season. However, we found a significant positive (negative) relationship between the SST (ΔOHC) and TSR. Specifically, an earlier sea ice retreat was associated with the dominance of larger phytoplankton during a colder and weakly stratified MIZ bloom season, suggesting that the duration of the nitrate supply, which is important for the growth of large-sized phytoplankton in this region (i.e. diatoms), can change according to the TSR. In addition, under-ice phytoplankton blooms are likely to occur in years with late ice retreat, because sufficient light for phytoplankton growth can pass through the ice and penetrate into the water columns as a result of an increase in solar radiation toward the summer solstice. Moreover, we found that both the length of the ice-free season and the annual median of FL positively correlated with the annual net primary production (APP). Thus, both the phytoplankton community composition and growing season are important for the APP in the study area. Our findings showed a quantitative relationship between the interannual variability of FL, the TSR, and the APP, which suggested that satellite remote sensing of the phytoplankton community size structure is suitable to document the impact of a recent rapid sea ice loss on the ecosystem of the study region.

scholarly journals Influence of timing of sea ice retreat on phytoplankton size during marginal ice zone bloom period in the Chukchi and Bering shelves

2015 ◽  
Vol 12 (15) ◽  
pp. 12611-12651
Author(s):  
A. Fujiwara ◽  
T. Hirawake ◽  
K. Suzuki ◽  
L. Eisner ◽  
I. Imai ◽  
...  
Keyword(s):  
Sea Ice ◽  
Satellite Remote Sensing ◽  
Phytoplankton Community ◽  
Size Structure ◽  
Negative Relationship ◽  
Community Size ◽  
Bloom Period ◽  
Ice Retreat ◽  
Phytoplankton Size ◽  
Sea Ice Retreat

Abstract. Timing of sea ice retreat (TSR) as well as cell size of primary producers (i.e., phytoplankton) plays crucial roles in seasonally ice-covered marine ecosystem. Thus, it is important to monitor the temporal and spatial distribution of phytoplankton community size structure. Prior to this study, an ocean color algorithm has been developed to derive phytoplankton size index FL, which is defined as the ratio of chlorophyll a derived from the cells larger than 5 μm to the total chl a using satellite remote sensing for the Chukchi and Bering shelves. Using this method, we analyzed pixel-by-pixel relationships between FL during marginal ice zone (MIZ) bloom period and TSR over a period of 1998–2013. The influence of TSR on sea surface temperature (SST) and changes in ocean heat content (ΔOHC) during the MIZ bloom period were also investigated. A significant negative relationship between FL and TSR was widely found in the shelf region during MIZ bloom season. On the other hand, we found a significant positive (negative) relationship between SST (ΔOHC) and TSR. That is, earlier sea-ice retreat was associated with a dominance of larger phytoplankton during a colder and weakly stratified MIZ bloom season, suggesting that duration of nitrate supply, which is important for large-sized phytoplankton growth in this region (i.e., diatoms), can change according to TSR. In addition, under-ice phytoplankton blooms are likely to occur in years with late ice retreat, because sufficient light for phytoplankton growth can pass through the ice and penetrate into the water columns due to an increase in solar radiation toward the summer solstice. Moreover, we found not only the length of ice-free season but also annual median of FL positively correlated with annual net primary production (APP). Thus, both phytoplankton community composition and growing season are important for APP in the study area. Our findings showed quantitative relationship between the inter-annual variability of FL, TSR and APP suggesting satellite remote sensing of phytoplankton community size structure is suitable to document the impact of recent rapid sea ice loss on ecosystem of the study region.

Biogeographical patterns of phytoplankton community size structure in the oceans

2013 ◽  
Vol 22 (9) ◽  
pp. 1060-1070 ◽  
Author(s):  
Esteban Acevedo-Trejos ◽  
Gunnar Brandt ◽  
Agostino Merico ◽  
S. Lan Smith
Keyword(s):  
Phytoplankton Community ◽  
Size Structure ◽  
Community Size
Sign in / Sign up

Export Citation Format

Share Document