Zooplankton community structure within various macrophyte stands of a small water body in relation to seasonal changes in water level

Shallow lakes are important for the maintenance of Lake Poyang ecosystem integrity, and zooplankton play an important role in its substance and energy flow. We investigated zooplankton in spring (April), summer (July), autumn (October) and winter (January of the following year) from 2012 to 2016 in a sub-lake of Lake Poyang with seasonal water level fluctuations. The study aims to understand their seasonal dynamics and interannual variation of zooplankton community in relation to environmental variables. A total of 115 species were identified in all samples of the 4 years, comprising 87 Rotifera, 13 Cladocera and 15 Copepoda. Rotifera was the dominant group in quantity and its species richness and abundance were significantly higher than Cladocera and Copepoda (P<0.05, by ANOVA), while Cladocera dominated in biomass. Species richness of Rotifera showed a significant seasonal difference (P<0.05 by ANOVA). The clear decline of zooplankton species richness in spring was mainly due to the dramatic decrease of Rotifera species. Furthermore, both density and biomass of zooplankton showed significant seasonal differences (P<0.05). Generally, the density and biomass of zooplankton were higher in summer and autumn than in winter and spring. Biodiversity indices e.g., Shannon-Wiener index and evenness were dramatically lower in spring than in other seasons. Non-metric multidimensional scaling (NMDS) analysis suggested that the zooplankton communities can be divided into three groups: spring community, summer–autumn community and winter community associated with distinct indicator species. The results of species richness and community analysis showed that the seasonal succession of zooplankton communities did not have interannual reproducibility. Redundancy analysis revealed that water temperature (WT), conductivity, pH and dissolved oxygen (DO) had significant effects on the zooplankton community. In addition, water level fluctuations, disturbance by wintering waterbirds and artificial water level control during dry season have potential effects on zooplankton community structure too. This study is helpful to further understand the ecosystem stability of lake connected with rivers and provide scientific guidance for protection of lake wetlands.

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Seasonal Variability in the Zooplankton Community Structure in a Sub-Arctic Fjord as Revealed by Morphological and Molecular Approaches

Frontiers in Marine Science ◽

10.3389/fmars.2021.705042 ◽

2021 ◽

Vol 8 ◽

Author(s):

Estelle Coguiec ◽

Elizaveta A. Ershova ◽

Malin Daase ◽

Tobias R. Vonnahme ◽

Owen S. Wangensteen ◽

...

Keyword(s):

Community Structure ◽

Seasonal Variability ◽

Seasonal Changes ◽

Spring Bloom ◽

Zooplankton Community ◽

Coi Gene ◽

Winter Period ◽

Species List ◽

Zooplankton Community Structure ◽

Arctic Fjord

Phyto- and zooplankton in Arctic and sub-Arctic seas show very strong seasonal changes in diversity and biomass. Here we document the seasonal variability in the mesozooplankton community structure in a sub-Arctic fjord in Northern Norway based on monthly sampling between November 2018 and February 2020. We combined traditional morphological zooplankton identification with DNA metabarcoding of a 313 base pair fragment of the COI gene. This approach allowed us to provide the most detailed mesozooplankton species list known for this region across an entire year, including both holo- and meroplankton. The zooplankton community was dominated by small copepods throughout the sampling period both in terms of abundance and relative sequence counts. However, meroplankton was the most diverse group, especially within the phylum polychaeta. We identified four distinct periods based on the seasonal analysis of the zooplankton community composition. The pre-spring bloom period (February–March) was characterized by low abundance and biomass of zooplankton. The spring bloom (April) was characterized by the presence of Calanus young stages, cirripedia and krill eggs. The spring-summer period (May–August) was characterized by a succession of meroplankton and a relatively high abundance of copepods of the genus Calanus spp. Finally, the autumn-winter period (September–December) was characterized by a high copepod diversity and a peak in abundance of small copepods (e.g., Oithona similis, Acartia longiremis, Pseudocalanus acuspes, Pseudocalanus elongatus, Pseudocalanus moultoni, Pseudocalanus minutus). During this period, we also observed an influx of boreal warm-water species which were notably absent during the rest of the year. Both the traditional community analysis and metabarcoding were highly complementary and with a few exceptions showed similar trends in the seasonal changes of the zooplankton community structure.

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Annual and Seasonal Changes in Zooplankton Community Structure of Lake Kawaguchi, Japan.

Japanese Journal of Limnology (Rikusuigaku Zasshi) ◽

10.3739/rikusui.59.69 ◽

1998 ◽

Vol 59 (1) ◽

pp. 69-78

Author(s):

Takashi ARAKAWA ◽

Norihiko YOSHIDA ◽

Kimio HIRABAYASHI ◽

Kazuya YOSHIZAWA

Keyword(s):

Community Structure ◽

Seasonal Changes ◽

Zooplankton Community ◽

Zooplankton Community Structure

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Seasonal Changes in Zooplankton Community Structure and Distribution Pattern in the Yellow Sea, China

Frontiers in Marine Science ◽

10.3389/fmars.2020.00391 ◽

2020 ◽

Vol 7 ◽

Author(s):

Yongqiang Shi ◽

Jun Wang ◽

Tao Zuo ◽

Xiujuan Shan ◽

Xianshi Jin ◽

...

Keyword(s):

Community Structure ◽

Distribution Pattern ◽

Yellow Sea ◽

Seasonal Changes ◽

Zooplankton Community ◽

The Yellow Sea ◽

Zooplankton Community Structure

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Seasonal and inter-annual community structure characteristics of zooplankton driven by water environment factors during different hydrological years in a sub-lake of Lake Poyang, China

10.7287/peerj.preprints.27528 ◽

2019 ◽

Author(s):

Beijuan Hu ◽

Xuren Hu ◽

Xue Nie ◽

Xiaoke Zhang ◽

Naicheng Wu ◽

...

Keyword(s):

Species Richness ◽

Community Structure ◽

Water Level ◽

Seasonal Succession ◽

Zooplankton Community ◽

Water Level Fluctuations ◽

Zooplankton Community Structure ◽

Lake Poyang ◽

Density And Biomass ◽

Zooplankton Communities

Shallow lakes are important for the maintenance of Lake Poyang ecosystem integrity, and zooplankton play an important role in its substance and energy flow. We investigated zooplankton in spring (April), summer (July), autumn (October) and winter (January of the following year) from 2012 to 2016 in a sub-lake of Lake Poyang with seasonal water level fluctuations. The study aims to understand their seasonal dynamics and interannual variation of zooplankton community in relation to environmental variables. A total of 115 species were identified in all samples of the 4 years, comprising 87 Rotifera, 13 Cladocera and 15 Copepoda. Rotifera was the dominant group in quantity and its species richness and abundance were significantly higher than Cladocera and Copepoda (P<0.05, by ANOVA), while Cladocera dominated in biomass. Species richness of Rotifera showed a significant seasonal difference (P<0.05 by ANOVA). The clear decline of zooplankton species richness in spring was mainly due to the dramatic decrease of Rotifera species. Furthermore, both density and biomass of zooplankton showed significant seasonal differences (P<0.05). Generally, the density and biomass of zooplankton were higher in summer and autumn than in winter and spring. Biodiversity indices e.g., Shannon-Wiener index and evenness were dramatically lower in spring than in other seasons. Non-metric multidimensional scaling (NMDS) analysis suggested that the zooplankton communities can be divided into three groups: spring community, summer–autumn community and winter community associated with distinct indicator species. The results of species richness and community analysis showed that the seasonal succession of zooplankton communities did not have interannual reproducibility. Redundancy analysis revealed that water temperature (WT), conductivity, pH and dissolved oxygen (DO) had significant effects on the zooplankton community. In addition, water level fluctuations, disturbance by wintering waterbirds and artificial water level control during dry season have potential effects on zooplankton community structure too. This study is helpful to further understand the ecosystem stability of lake connected with rivers and provide scientific guidance for protection of lake wetlands.

Download Full-text