Latitudinal distribution of zooplankton communities in the Western Pacific along 160°E during summer 2014

Sun, Dong; Wang, Chunsheng

doi:10.1016/j.jmarsys.2017.01.011

Cited by 21 publications

(16 citation statements)

References 40 publications

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“…This may be one of the reasons why the number of species in the present study is somewhat higher than in the study of Dai et al Similar to the findings of Dai et al [17] and Yang et al [18], copepods and Chaetognaths are the dominant taxa in the Western Pacific. However, as shown in Table 3, the zooplankton abundance in this survey was more consistent with the results of Yang et al [18] and Sun et al [19] and much higher than the results of Dai et al [17]. This may be related to the different methods used in the survey [36,37].…”

Section: Comparison With Historical Datasupporting

confidence: 90%

“…For S1 and S2, zooplankton abundance was the highest in the NECC region and lowest in the STCC region, in agreement with the results of Yang et al [18]. However, this is not consistent with the findings of Sun et al [19] that community abundance generally increases with increasing latitude [19]. However, a decreasing value of zooplankton abundance between 20 • N and 30 • N can also be seen in the graphs in their study.…”

Section: Relationship Between Ocean Current Factors and Zooplanktonsupporting

confidence: 55%

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Western Pacific Zooplankton Community along Latitudinal and Equatorial Transects in Autumn 2017 (Northern Hemisphere)

et al. 2021

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During the autumn of 2017, a study was conducted to assess the zooplankton community composition in three sections (two latitudinal, going from Japan to the equator, and one longitudinal on the equator) of the Western Pacific Ocean. A total of 384 species of zooplankton adults and 21 groups of zooplankton larvae were identified, with copepods being the predominant taxon. The common dominant species across the three sections were Acrocalanus gibber, Canthocalanus pauper, Oithona similis, Paracalanus aculeatus, and Oncaea venusta. Zooplankton abundance was the highest in the equator section, with a mean abundance of 258.94 ± 52.57 ind./m3. Comparatively, a low abundance was recovered from the Subtropical Countercurrent (STCC) region, while the highest abundance holding stations were located in the eastern equatorial and North Equatorial Countercurrent (NECC) regions. Pearson’s correlation, canonical correspondence analysis, and other methods were used to analyze the relationship between environmental factors and zooplankton. We found that the Shannon–Wiener diversity index and Pielou’s uniformity index were significantly correlated (p < 0.05) with concentrations of nitrite and chlorophyll a. The distribution of zooplankton was also limited by nutrients, chlorophyll a, and dissolved oxygen. In addition, we reveal differences in the abundance of species in the equatorial and latitudinal seas. We found that not only temperature and nutrient salinity, but also ocean currents and the movement of water masses, influence the distribution of zooplankton communities in the Western Pacific.

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Section: Comparison With Historical Datasupporting

confidence: 90%

Section: Relationship Between Ocean Current Factors and Zooplanktonsupporting

confidence: 55%

Western Pacific Zooplankton Community along Latitudinal and Equatorial Transects in Autumn 2017 (Northern Hemisphere)

et al. 2021

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“…Early Pacific studies surveyed only the distribution of zooplankton, including copepods, and major water mass structures were a key factor in determining zooplankton biogeography [16,17]. The whole copepod community was analyzed only in a specific region, and a relatively few large-scale studies were conducted in the Pacific, such as those that compared the copepod community between north and south subtropical circulation [18], or studied the latitudinal patterns of copepods from the equator to subarctic at 160˚E [19]. Calanoid community and its diversity were investigated from epipelagic (0-200 m) to bathypelagic (1,000-4,000 m) layers at 12 stations in the North Pacific [20], whereas large-scale studies on copepod communities across the Pacific are limited below the epipelagic layer.…”

Section: Introductionmentioning

confidence: 99%

Large-scale metabarcoding analysis of epipelagic and mesopelagic copepods in the Pacific

2020

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A clear insight into the large-scale community structure of planktonic copepods is critical to understanding the mechanisms controlling diversity and biogeography of marine taxa in terms of their high abundance, ubiquity, and sensitivity to environmental changes. Here, we applied a 28S metabarcoding approach to large-scale communities of epipelagic and mesopelagic copepods at 70 stations across the Pacific Ocean and three stations in the Arctic Ocean. Major patterns of community structure and diversity, influenced by water mass structures, agreed with results from previous morphology-based studies. However, a largescale metabarcoding approach could detect community changes even under stable environmental conditions, including changes in the north/south subtropical gyres and east/west areas within each subtropical gyre. There were strong effects of the epipelagic environment on mesopelagic communities, and community subdivisions were observed in the environmentally stable mesopelagic layer. In each sampling station, higher operational taxonomic unit (OTU) numbers and lower phylogenetic diversity were observed in the mesopelagic layer than in the epipelagic layer, indicating a recent rapid increase in species numbers in the mesopelagic layer. The phylogenetic analysis utilizing representative sequences of OTUs revealed trends of recent emergence of cold-water OTUs, which are mainly distributed at high latitudes with low water temperatures. Conversely, the high diversity of copepods at low latitudes was suggested to have been formed through long evolution under high water temperature conditions. The metabarcoding results suggest that evolutionary processes have strong impacts on current patterns of copepod diversity, and support the "out of the tropics" theory explaining latitudinal diversity gradients of copepods. Diversity patterns in both epipelagic and mesopelagic copepods was highly correlated to sea surface temperature; thus, predicted global warming may have a significant impact on copepod diversity in both layers.

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“…In early studies in the Pacific, only major species of zooplankton including copepods were examined for their distribution, and major water mass structures were a key factor in determining zooplankton biogeography [16, 17]. Whole-community analyses of copepods have only been carried out in specific areas, and there are relatively few large-scale studies in the Pacific; Williamson and McGowan compared copepod communities between north and south subtropical gyres [18], and Sun and Wang studied latitudinal patterns of copepods from the equator to subarctic regions along 160°E [19]. Calanoid copepod community and diversity have also been investigated from epipelagic (0–200 m) to bathypelagic (1,000–4,000 m) layers at 12 stations in the North Pacific [20].…”

Section: Introductionmentioning

confidence: 99%

Large-scale metabarcoding analysis of epipelagic and mesopelagic copepods in the Pacific

Hirai

Tachibana

Tsuda

2020

Preprint

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AbstractA clear insight into large-scale community structure of planktonic copepods is critical to understanding mechanisms controlling diversity and biogeography of marine taxa, owing to their high abundance, ubiquity, and sensitivity to environmental changes. Here, we applied a 28S metabarcoding approach to large-scale communities of epipelagic and mesopelagic copepods at 70 stations across the Pacific Ocean and three stations in the Arctic Ocean. Major patterns of community structure and diversity, influenced by water mass structures, agreed with results from previous morphology-based studies. However, large-scale metabarcoding approach could detected community changes even under stable environmental conditions, including changes in the north/south subtropical gyres and east/west areas within each subtropical gyre. There were strong effects of epipelagic environment on mesopelagic communities, and community subdivisions were observed in the environmentally-stable mesopelagic layer. In each sampling station, higher operational taxonomic unit (OTU) numbers and lower phylogenetic diversity were observed in the mesopelagic layer than in the epipelagic layer, indicating a recent rapid increase of species numbers in the mesopelagic layer. The phylogenetic analysis utilizing representative sequences of OTUs revealed trends of recent emergence of cold-water OTUs mainly distributed at high latitudes with low water temperatures. Conversely, high diversity of copepods at low latitudes was suggested to have been formed through long evolutionary history under high water temperature. The metabarcoding results suggest that evolutionary processes have strong impacts on current patterns of copepod diversity, and support the “out of the tropics” theory explaining latitudinal diversity gradients of copepods. Both diversity patterns in epipelagic and mesopelagic showed high correlations to sea surface temperature; thus, predicted global warming may have a significant impact on copepod diversity in both layers.Author SummaryMarine planktonic copepods are highly dominant and diverse, and revealing their community structure and diversity is important to understanding marine ecosystems. We used molecular-based metabarcoding to reveal a total of 205 copepod communities in the ‘sunlight’ or epipelagic layer (0– 200 m) and the ‘twilight’ or mesopelagic layer (200–500 m and 500–1,000 m), mainly in the Pacific Ocean (data for 70 stations), but also in the Arctic Ocean (data for three stations). Different copepod communities were found in each geographical region with different environmental conditions, including tropical, subtropical, transition, Kuroshio Current, California Current, subarctic and arctic areas. The metabarcoding method sensitively detected small changes of copepod community even in environmentally-stable subtropical ocean systems and the mesopelagic layer. A high diversity of copepods was detected at low latitudes, and copepod diversity was higher in the mesopelagic layer than in the epipelagic layer in each area. These diversity patterns were influenced by both evolutionary history and present environmental conditions. The copepod community in the mesopelagic layer was strongly influenced by environmental conditions in the epipelagic layer. Thus, predicted climate changes may affect marine ecosystems not only in the epipelagic layer but also in the mesopelagic layer.

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Latitudinal distribution of zooplankton communities in the Western Pacific along 160°E during summer 2014

Cited by 21 publications

References 40 publications

Western Pacific Zooplankton Community along Latitudinal and Equatorial Transects in Autumn 2017 (Northern Hemisphere)

Western Pacific Zooplankton Community along Latitudinal and Equatorial Transects in Autumn 2017 (Northern Hemisphere)

Large-scale metabarcoding analysis of epipelagic and mesopelagic copepods in the Pacific

Large-scale metabarcoding analysis of epipelagic and mesopelagic copepods in the Pacific

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