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1
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Distribution and role of the genus Oithona (Copepoda: Cyclopoida) in the South China Sea

100%
Wang L., Du F., Wang X., Li Y., Ning J.
Oceanologia
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2017
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tom 59
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nr 3
The relationships between the small cyclopoid copepod Oithona and hydrological factors, phytoplankton and ichthyoplankton were evaluated using the data obtained in the central South China Sea (SCS) in summer 2014. The genus abundance ranged from 6.00 ind. m3 to 93.75 ind. m3 with high abundance band occurring in the branch of SCS Monsoon Jet. The lower temperature and higher salinity in the surface water of the band than other zones indicated that deep water intrusion was a positive factor for aggregation of the genus. The community structure of the genus was dominated by Oithona plumifera and Oithona similis made up 97% of the genus abundance associated with Oithona tenuis. The result of db-RDA analysis showed that the community structure of the genus was affected by temperature, Chl a, larval fishes and fish spawns, and temperature was the most important limiting factor. The result of GAMs analysis showed that abundance of O. tenuis, and copepodites were affected by Chl a, larval fishes and fish spawns; abundance of O. similis was affected by Chl a and fish spawns; and abundance of O. plumifera was affected by Chl a and larval fishes. Therefore, we suggest that the branch of SCS Monsoon Jet and deep water intrusion favor aggregation of plankton in the central SCS in summer. We confirm that the temperature is the limiting factor to the reproduction of the genus Oithona in tropic seas and the genus Oithona is a food-web linker between primary production and larval fishes in the central SCS.
2

Effects of hydrological and physicochemical factors on phytoplankton communities in floodplain lakes

100%
Grabowska M., Glinska-Lewczuk K., Obolewski K., Burandt P., Kobus S., Dunalska J., Kujawa R., Gozdziejewska A., Skrzypczak A.
Polish Journal of Environmental Studies
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2014
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tom 23
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nr 3
The fate of phytoplankton communities in different hydrological and hydrochemical conditions was studied in the middle basin of the Biebrza River (NE Poland). Our results showed that hydrological connectivity significantly influenced phytoplankton abundance in floodplain lakes: minimal abundance was stated in lotic and maximal in lentic waterbodies. Phytoplankton diversity and species richness were related to changes in water levels. During the low-water phase, phytoplankton biodiversity was the lowest in lentic and the highest in lotic lakes. High water levels promoted exchanges in species among waterbodies and the river, which increased biodiversity indices. We concluded that the isolation of any floodplain lake from the river channel deteriorates its trophic conditions. Thus, the decrease in phytoplankton biodiversity in floodplain lakes should be regarded as an indirect feedback of the hydrobionts on the hydrological factors.
3
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Environmental effects of temperature rise and long periods without precipitation on soil processes – case study for southern Slovakia

80%
Jurik L., Halaj P., Mosiej J., Pokryvkova J., Sedmakova M.
Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation
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2018
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tom 50
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nr 3
4
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An assessment of nutrient conditions in the Southern Baltic Sea between 1994 and 1998

80%
Lysiak-Pastuszak E.
Oceanologia
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2000
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tom 42
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nr 4
Temporal variations (1994–98) in nutrient distribution were analysed in the Polish sector of the Baltic Sea with reference to long-term (1979–98) fluctuations of hydrological and chemical factors. Between 1994 and 1998 the winter accumulation of phosphate declined noticeably in most of the regions with the exception of the Gulf of Gdańsk. The winter peaks of silicate were also reduced in the offshore region and in the waters along the central Polish coast, but continued to accumulate in the bays owing to riverine input. In the offshore region a decrease in the winter accumulation of nitrate was noted in the surface water layer whereas in the bays nitrate concentrations continued to increase. Large quantities of nitrate continue to accumulate in the Gulf of Gdańsk, although at a slower rate than in 1979–93.
5

Oxygen and nutrients in the southern Baltic Sea

80%
Trzosinska A., Lysiak-Pastuszak E.
Oceanological Studies
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1996
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tom 25
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nr 1-2
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