Influence of Zooplankton and Environmental Factors on Clear-Water Phase in Lake Paldang, South Korea

Lake Paldang is a complex water system with both fluvial and lacustrine characteristics and the largest artificial dam lake in South Korea. In this study, the different occurrence patterns and causes of the clear-water phase (CWP) were investigated using water quality and hydrological factors at four sites in Lake Paldang. Among the environmental and other factors associated with CWP occurrence, secchi depth and turbidity exhibited significant correlations with precipitation, hydraulic retention time (HRT), and individual and relative abundance (RA) of zooplankton (Cladocera) (p < 0.01). Hence, a change in the HRT because of precipitation could alter the CWP. The Cladocera individuals and RA showed significant correlations with the water temperature, indicating that the emergence of Cladocera in spring as the water temperature rises could cause the CWP. Sensitivity assessments conducted using Bayesian models demonstrated different CWP occurrence sensitivity relationships for the river-type, lake-type, and shallow and deep sites. Turbidity, secchi depth, and zooplankton factors also showed sensitive relationships with CWP occurrence for all sites. The sensitivity to precipitation and HRT was higher in the river-type sites. The lake-type sites, with common Cladocera emergence and long HRT, favored CWP occurrence. Thus, CWP occurrence was dependent on the site characteristics and climate conditions.

Download Full-text

Climate and food web effects on the spring clear‐water phase in two north‐temperate eutrophic lakes

Limnology and Oceanography ◽

10.1002/lno.11584 ◽

2020 ◽

Author(s):

Shin‐Ichiro S. Matsuzaki ◽

Richard C. Lathrop ◽

Stephen R. Carpenter ◽

Jake R. Walsh ◽

M. Jake Vander Zanden ◽

...

Keyword(s):

Food Web ◽

Water Phase ◽

Clear Water ◽

Eutrophic Lakes ◽

Clear Water Phase

Download Full-text

Daphnia grazing, the clear water phase, and implications of minerogenic particles in Onondaga Lake

Inland Waters ◽

10.5268/iw-5.4.765 ◽

2015 ◽

Vol 5 (4) ◽

pp. 317-330 ◽

Cited By ~ 3

Author(s):

Steven W Effler ◽

Michael E Spada ◽

Rakesh K Gelda ◽

Feng Peng ◽

David A Mattews ◽

...

Keyword(s):

Water Phase ◽

Onondaga Lake ◽

Clear Water ◽

Clear Water Phase ◽

Minerogenic Particles

Download Full-text

Comparison of Dynamic Models for Edible Phytoplankton

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f93-197 ◽

1993 ◽

Vol 50 (8) ◽

pp. 1757-1767 ◽

Cited By ~ 13

Author(s):

Stephen R. Carpenter ◽

Richard C. Lathrop ◽

Alejandro Muñoz-del-Rio

Keyword(s):

Functional Response ◽

Algal Growth ◽

Water Phase ◽

Series Data ◽

Type I ◽

Clear Water ◽

Alternative Models ◽

Lake Mendota ◽

Edible Algae ◽

Clear Water Phase

Alternative models for the dynamics of edible phytoplankton were compared using long-term data from mesotrophic Paul Lake and eutrophic Lake Mendota. Alternative models fit to the data contrasted linear versus logistic algal growth, type I versus type II functional response, and prey-dependent versus ratio-dependent predation. In both lakes, the model with lowest prediction error had logistic algal growth and a type I, prey-dependent functional response. Under these models, the spring bloom and clear-water phase of productive lakes can be explained as an incomplete predator–prey cycle: the spring pulse of edible algae is followed by a peak of Zooplankton; then, edible algae are overgrazed leading to the clear-water phase and collapse of the grazer biomass. This study demonstrates the use of time series data at the ecosystem scale to identify process-based models, contrast alternative models on a probabilistic basis, and estimate parameters. This approach avoids the assumptions involved in extrapolating ecosystem models from smaller scale studies.

Download Full-text

Do zooplankton contribute to an ultraviolet clear-water phase in lakes?

Limnology and Oceanography ◽

10.4319/lo.2007.52.2.0662 ◽

2007 ◽

Vol 52 (2) ◽

pp. 662-667 ◽

Cited By ~ 16

Author(s):

Craig E. Williamson ◽

Hendrika J. De Lange ◽

Dina M. Leech

Keyword(s):

Water Phase ◽

Clear Water ◽

Clear Water Phase

Download Full-text

Experimental determination of cold water temperature at the inlet to solar water storage tanks

E3S Web of Conferences ◽

10.1051/e3sconf/201911600106 ◽

2019 ◽

Vol 116 ◽

pp. 00106 ◽

Cited By ~ 1

Author(s):

Miroslaw Zukowski

Keyword(s):

Water Temperature ◽

Cold Water ◽

Tap Water ◽

Water System ◽

District Heating ◽

Hot Water ◽

Storage Tanks ◽

Climate Conditions ◽

Cold Water Temperature

In the present work, results of experimental research on the mains water temperature supplying the Solar Domestic Hot Water system in the period from 2016 to 2018 are shown. The test object is located in the Hotel for Research Assistants on Bialystok University of Technology campus in Poland. One of the elements that will guarantee the correct energy balance of a hot tap-water system is the exact determination of the cold water temperature. The aim of this study is estimation of the temperature of the mains water flowing into the district heating substation and the water feeding directly the heat storage tanks. The research results showed that the average value of the cold water was 14.09°C during the 3 years of measurements. Moreover, it was shown that this temperature increased by about 0.4°C as a result of heat exchange with the air inside the substation. In the article, the author proposed modifications of coefficients in a commonly used model developed by National Renewable Energy Laboratory for determining the temperature of mains water in energy simulations. The proposed changes allow for accurate modelling of the cold water temperature under the climate conditions of north-eastern Poland.

Download Full-text

Clear-water phase in the Řimov Reservoir (South Bohemia): Controlling factors

SIL Proceedings 1922-2010 ◽

10.1080/03680770.1989.11898975 ◽

1991 ◽

Vol 24 (2) ◽

pp. 1336-1339

Author(s):

V. Vyhnálek ◽

J. Komárková ◽

J. Seďa ◽

Z. Brandl ◽

K. Šimek ◽

...

Keyword(s):

Controlling Factors ◽

Water Phase ◽

Clear Water ◽

Římov Reservoir ◽

Clear Water Phase ◽

South Bohemia

Download Full-text

Influences of grazing on temporal patterns of algal pigments in suspended and sedimenting algae in a north temperate lake

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f98-153 ◽

1999 ◽

Vol 56 (1) ◽

pp. 60-69 ◽

Cited By ~ 12

Author(s):

David Poister ◽

David E Armstrong ◽

James P Hurley

Keyword(s):

Water Column ◽

Chlorophyll A ◽

Temporal Trends ◽

Sediment Traps ◽

Grazing Pressure ◽

Water Phase ◽

Carotenoid Pigment ◽

Clear Water ◽

Heavy Grazing ◽

Clear Water Phase

The concentrations of phytoplankton pigments in suspended and settling particles were measured in Trout Lake, Wisconsin, U.S.A., during the 1993 ice-free season. A decrease in water column concentrations of chlorophyll a coincident with an increase in pheophorbide and pheophytin concentrations occurred during a "clear-water" phase in June. The lack of a corresponding decrease in carotenoid pigment concentrations indicated that carotenoid pigments were degraded to a lesser extent than chlorophyll a during this period of heavy grazing pressure. Chlorophyll a, pheophorbide, and pheophytin showed temporal trends in fluxes to sediment traps that were similar for all pigments but did not correspond to trends in water column pigment concentration. Fucoxanthin concentrations and microscopic examination indicated that the sedimentation of large, dense diatoms increased the sedimentation rate of chlorophyll during the clear-water phase. In addition, ungrazed diatoms apparently were the main source of pheophorbide in trap material during the clear-water phase, indicating that pheophorbide should not be used as a surrogate for fecal pellet sedimentation in lakes influenced by the sedimentation of large diatoms.

Download Full-text