Causes of under- or overestimation of zooplankton biomass using Optical Plankton Counter (OPC): effect of size and taxa

Matsuno, Kohei; Kim, Hye Seon; Yamaguchi, Atsushi

doi:10.3800/pbr.4.154

Cited by 5 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4). In previous studies, zooplankton biomass in the North Pacific estimated by OPC measurements on formalin preserved samples was reported to be correlated with directly measured mass by a factor of 0.97-1.16 (Yokoi et al 2008, Matsuno et al 2009, Matsuno & Yamaguchi 2010. The factor calculated in the present study (1.176) is close to these previously reported values.…”

Section: Opc Calibrationsupporting

confidence: 80%

Interannual and latitudinal changes in zooplankton abundance, biomass and size composition along a central North Pacific transect during summer: analyses with an Optical Plankton Counter

Fukuda

Yamaguchi

Matsuno

et al. 2012

Plankton Benthos Res

Self Cite

View full text Add to dashboard Cite

2 but the differences between the three oceanic domains were not significant. However, highly significant latitudinal changes were observed in the mean zooplankton biomass, which ranged from 1.44 to 13.2 mg dry mass m 2 with higher values in the Transitional Domain (TR) than in the Subarctic and Subtropical Domains. The high biomass in the TR was caused by the dominance of large-sized zooplankton with equivalent spherical diameters (ESD) of 2-4 mm, regarded to consist mainly of Neocalanus spp. C5. Both the slope and intercept of the Normalized Biomass Size Spectrum also showed significant latitudinal changes with a moderate slope and low intercept in the TR due to the dominance of large zooplankton with 2-4 mm ESD in biomass. In contrast to these large latitudinal changes, only limited interannual variations were observed for zooplankton abundance and biomass in the central North Pacific during the study period.

show abstract

Section: Opc Calibrationsupporting

confidence: 80%

Interannual and latitudinal changes in zooplankton abundance, biomass and size composition along a central North Pacific transect during summer: analyses with an Optical Plankton Counter

Fukuda

Yamaguchi

Matsuno

et al. 2012

Plankton Benthos Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…WM was converted to dry mass (DM) assuming that the water content of zooplankton was 90% (DMϭ0.1ϫWM), which is the mean water content of zooplankton from subarctic to subtropical areas in the North Pacific Ocean above 1,000 m , Matsuno et al 2009). For calibration of OPC derived biomass, direct WM measurements were made on all samples with a precision of 10 mg.…”

Section: ϫ3mentioning

confidence: 99%

Abundance and biomass of mesozooplankton along north-south transects (165^|^deg;E and 165^|^deg;W) in summer in the North Pacific: an analysis with an optical plankton counter

Matsuno

Yamaguchi

2010

Plankton Benthos Res

Self Cite

View full text Add to dashboard Cite

Zooplankton abundance and biomass along 165°E and 165°W in the North Pacific were estimated using an optical plankton counter on preserved samples collected with a plankton net of 335 mm mesh-size from 0-150 m at 89 stations from the subarctic to subtropical regions during the summers of [2003][2004][2005][2006]; the stations were grouped into subarctic (SA), transitional (TR) and subtropical (ST) regions for latitudinal comparisons. The two-way ANOVA and a post hoc test showed that total abundance and biomass were significantly larger in SA and smaller in ST stations, respectively, than in the other regions, but were not significantly different between 165°E and 165°W. Total ranges of abundance and biomass were: 34ϫ10 3 -65ϫ10 3 indiv. m Ϫ2 and 2.9-7.9 g dry mass m Ϫ2 , respectively. The variation in abundance was mainly governed by the variation of 0.34-1.00 mm equivalent spherical diameter (ESD) size class zooplankton, but total biomass variations were due mainly to the 2.00-3.00 mm ESD size class, which corresponds to the calanoid copepod Neocalanus spp. copepodid stage 5 (C5) that had a greater abundance in SA and TR than in ST. Despite possibly higher abundances of Neocalanus C5 in TR than in SA, abundance and biomass of the 2.00-3.00 mm ESD size class were not significantly different between the two regions. Size reduction of individuals due to higher temperatures in TR than in SA may be a possible explanation.

show abstract

“…The biomass of zooplankton was recorded as wet mass (WM) by the direct weighting of subsamples. WM was converted to dry mass (DM) assuming that the water content of zooplankton was 90% (WM × 0.1 = DM; Matsuno et al., 2009). Subsequently, the following indicator species were selected and were combined as Pacific species: Eucalanus bungii , Metridia pacifica , Neocalanus spp.…”

Section: Methodsmentioning

confidence: 99%

Spatial and Interannual Patterns of Epipelagic Summer Mesozooplankton Community Structures in the Western Arctic Ocean in 2016–2020

Kim

Cho

et al. 2022

JGR Oceans

View full text Add to dashboard Cite

Mesozooplankton play a crucial role as primary or secondary consumers in Arctic ecosystems and are sensitive indicators of environmental changes. This research is the first comprehensive Arctic zooplankton study covering the area ranging from the southern Chukchi Sea (SCS) and the northern Chukchi Sea (NCS) to the East Siberian Sea (ESS). Mesozooplankton samples were collected at 151 stations in the western Arctic Ocean each August from 2016 to 2020. The mesozooplankton abundance of the study area ranged from 9 to 6,172 ind. m−3, and the predominant group was copepods at 7–3,866 ind. m−3, of which Pseudocalanus spp. and Calanus glacialis were the most abundant copepods. In the SCS, small copepods and meroplankton, such as Pseudocalanus spp., Cirripedia larvae, Echinodermata larvae, and Centropages abdominalis were the predominant taxa. Especially in 2019, C. abdominalis dominated over meroplankton when water temperatures were high (maximum 12.5°C; sea surface temperature, SST). In the NCS and ESS, C. glacialis, Pseudocalanus spp., Metridia longa, Oithona similis, Parasagitta elegans, and Calanus hyperboreus were abundant. The distributions and structures of mesozooplankton communities indicated variability over large spatial scales in the western Arctic waters because of variations in multiple factors, such as water temperature, salinity, and sea ice; however, geographical effects cannot be ignored even during alterations in the physical properties. Our results suggest that these variable patterns of mesozooplankton communities fluctuate horizontally from south to north as warming progresses on a regional bathymetric basis, and can be used to infer the fate of mesozooplankton communities in the study area.

show abstract

Causes of under- or overestimation of zooplankton biomass using Optical Plankton Counter (OPC): effect of size and taxa

Cited by 5 publications

References 21 publications

Interannual and latitudinal changes in zooplankton abundance, biomass and size composition along a central North Pacific transect during summer: analyses with an Optical Plankton Counter

Interannual and latitudinal changes in zooplankton abundance, biomass and size composition along a central North Pacific transect during summer: analyses with an Optical Plankton Counter

Abundance and biomass of mesozooplankton along north-south transects (165^|^deg;E and 165^|^deg;W) in summer in the North Pacific: an analysis with an optical plankton counter

Spatial and Interannual Patterns of Epipelagic Summer Mesozooplankton Community Structures in the Western Arctic Ocean in 2016–2020

Contact Info

Product

Resources

About