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Impact of the Słupia River waters on microbial communities in the port of Ustka and adjacent Baltic Sea waters Cover

Impact of the Słupia River waters on microbial communities in the port of Ustka and adjacent Baltic Sea waters

Oceanological and Hydrobiological Studies
Volume 47 (2018): Issue 4 (December 2018)
By: Krzysztof Rychert,  Magdalena Wielgat-Rychert and  Łukasz Lemańczyk  
Open Access
|Dec 2018

Figures & Tables

Figure 1

Location of sampling sites near the town of Ustka. Samples were collected on 18 July 2014 from the Słupia River (sample 1), the port of Ustka (samples 2, 3, and 3D) and from Baltic Sea waters (samples 4–8). Samples 1–8 were collected from the surface zone. Sample 3D was collected from the near-bottom zone.
Location of sampling sites near the town of Ustka. Samples were collected on 18 July 2014 from the Słupia River (sample 1), the port of Ustka (samples 2, 3, and 3D) and from Baltic Sea waters (samples 4–8). Samples 1–8 were collected from the surface zone. Sample 3D was collected from the near-bottom zone.

Figure 2

Changes in chlorophyll a (black dots) and total suspended matter (circles) concentrations in surface waters (excluding sample 3D) along the transect between the Słupia River mouth and offshore waters. The correlation between the distance and chlorophyll a is statistically significant (trend line, R2 = 0.63, p = 0.02). The highest concentration of total suspended matter was encountered close to the entrance to the port of Ustka (station 4, 1.43 km from the river mouth, value 3.14 mg l−1; Fig. 1).
Changes in chlorophyll a (black dots) and total suspended matter (circles) concentrations in surface waters (excluding sample 3D) along the transect between the Słupia River mouth and offshore waters. The correlation between the distance and chlorophyll a is statistically significant (trend line, R2 = 0.63, p = 0.02). The highest concentration of total suspended matter was encountered close to the entrance to the port of Ustka (station 4, 1.43 km from the river mouth, value 3.14 mg l−1; Fig. 1).

Figure 3

Taxonomic composition of ciliate communities observed along the transect between the Słupia River mouth and offshore waters. Samples 1–8 were collected from surface waters and sample 3D was collected from the near-bottom zone at sampling site 3. The main difference between less saline waters (samples 1–3) and more saline waters (samples 3D and 4–8) was the occurrence of ciliates from the orders Oligotrichida and Choreotrichida, which constituted 3–4% of the ciliate biomass in less saline waters and 45–80% of its biomass in more saline waters. The difference is statistically significant (U test, p = 0.03).
Taxonomic composition of ciliate communities observed along the transect between the Słupia River mouth and offshore waters. Samples 1–8 were collected from surface waters and sample 3D was collected from the near-bottom zone at sampling site 3. The main difference between less saline waters (samples 1–3) and more saline waters (samples 3D and 4–8) was the occurrence of ciliates from the orders Oligotrichida and Choreotrichida, which constituted 3–4% of the ciliate biomass in less saline waters and 45–80% of its biomass in more saline waters. The difference is statistically significant (U test, p = 0.03).

Abundance, biomass and composition of ciliate communities studied on 18 July 2014

GroupAbundance (cells ml−1)Biomass (ng C ml−1)Composition
Sample 1 – the Słupia River mouth
Prostomatida0.240.07Urotricha sp., Prorodon sp.
Scuticociliatida0.240.04Cyclidium glaucoma
Oligotrichida and Choreotrichida0.060.01Rimostrombidium sp.
Hypotrichida0.180.11Unidentified
Other and unidentified ciliates0.180.04Hymenostomatid ciliates, unidentified
Total0.900.27
Sample 2 – surface waters in the Port of Ustka
Prostomatida0.330.32Urotricha spp., Prorodon sp., Holophrya sp.
Scuticociliatitida0.030.01Cyclidium sp.
Oligotrichida and Choreotrichida0.070.01Rimostrombidium sp.
Hypotrichida0.030.01Unidentified
Total0.470.35
Sample 3 – surface waters in the Port of Ustka
Prostomatida0.140.37Urotricha sp., Holophrya spp.
Haptorida0.050.04Askenasia sp., Mesodinium sp. (heterotrophic)
Oligotrichida and Choreotrichida0.050.03Rimostrombidium sp.
Unidentified0.100.30Unidentified
Total0.340.75
Sample 3D – near-bott om waters in the Port of Ustka
Prostomatida2.600.52Balanion comatum, Urotricha sp.
Haptorida0.700.32Mesodinium rubrum, Askenasia sp., Mesodinium sp. (heterotrophic)
Oligotrichida and Choreotrichida1.102.14Rimostrombidium sphaericum, Strombidium spp.
Total4.402.98
Sample 4 – surface waters outside the port of Ustka
Prostomatida3.300.54Balanion comatum, Urotricha spp., Holophrya sp.
Haptorida0.800.20Mesodinium rubrum, Mesodinium sp. (heterotrophic), Askenasia sp.
Oligotrichida and Choreotrichida1.100.68Rimostrombidium sphaericum, Strombidium spp., Strobilidium sp.
Unidentified0.200.04Unidentified
Total5.401.46
Sample 5 – surface of shore waters
Prostomatida1.840.35Balanion comatum, Urotricha sp.
Haptorida0.320.22Mesodinium rubrum/major, Mesodinium sp. (heterotrophic), Askenasia sp.
Oligotrichida and Choreotrichida1.282.67Rimostrombidium sphaericum, Pelagostrobilidium spirale, Strombidium sp.
Unidentified0.560.11Unidentified
Total4.003.35
Sample 6 – surface of shore waters
Prostomatida2.640.57Balanion comatum, Urotricha sp.
Haptorida0.400.14Mesodinium rubrum, Askenasia sp.
Oligotrichida and Choreotrichida0.880.93Rimostrombidium sphaericum, Strombidium spp., Lohmanniella oviformis
Peritrichida0.240.35Vaginicola sp.
Unidentified0.560.08Unidentified
Total4.722.06
Sample 7 – surface offshore waters
Prostomatida2.120.37Balanion comatum, Urotricha sp.
Haptorida0.520.18Mesodinium sp. (heterotrophic), Mesodinium rubrum/major, Askenasia sp.
Oligotrichida and Choreotrichida1.002.45Rimostrombidium sphaericum, Pelagostrobilidium spirale, Strombidium spp., others
Peritrichida0.120.18Vaginicola sp.
Unidentified0.560.09Unidentified
Total4.323.27
Sample 8 – surface of shore waters
Prostomatida0.880.21Urotricha sp., Balanion comatum, Holophrya sp.
Haptorida0.190.09Mesodinium rubrum
Oligotrichida and Choreotrichida1.452.91Rimostrombidium sphaericum, Tinti nnopsis sp., Lohmanniella oviformis
Peritrichida0.061.17Vorti cella sp.
Unidentified0.060.02Unidentified
Total2.654.40

Parameters measured in two water masses separated along the transect between the Słupia River mouth and offshore waters_ Less saline water was observed in the river mouth and in the surface layer in the port (samples 1–3), whereas more saline water was observed in the near-bottom zone in the port (sample 3D) and outside the port (samples 4–8)_ Obviously, Secchi depth was not determined at near-bottom sampling site 3D_ Statistically significant differences between the two separate water masses were demonstrated for each parameter_

ParameterSamples 1–3Samples 3D, 4–8Statistical significance according to Mann-Whitney U test
Salinity (PSU)0.21–0.876.61–7.80p = 0.03
Secchi depth (m)2.5–3.05.0–7.5p = 0.03
Bacterial abundance (106 ml−1)5.51–6.160.99–2.14p = 0.03
Ciliate abundance (cells ml−1)0.34–0.902.65–5.40p = 0.03
Ciliate biomass (ng C ml−1)0.27–0.751.46–4.40p = 0.03
DOI: https://doi.org/10.1515/ohs-2018-0040 | Journal eISSN: 1897-3191 | Journal ISSN: 1730-413X
Journal RSS Feed
Language: English
Page range: 429 - 438
Submitted on: Apr 5, 2018
|
Accepted on: Jun 4, 2018
|
Published on: Dec 3, 2018
Published by: University of Gdańsk
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
ciliates,
bacteria,
chlorophyll,
estuary,
microbial food web,
Mesodinium rubrum
Related subjects:
Chemistry,
Chemistry, other,
Geosciences,
Geosciences, other,
Life sciences,
Life sciences, other

© 2018 Krzysztof Rychert, Magdalena Wielgat-Rychert, Łukasz Lemańczyk, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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