scholarly journals Monitoring and Modeling of Chlorophyll-a Dynamics in a Eutrophic Lake: M'koa Lake (Jacqueville, Ivory Coast)

2018 ◽  
Vol 6 (1) ◽  
pp. 1-9
Author(s):  
Yapo Habib Kpidi ◽  
Ossey Bernard Yapo ◽  
Mamadou Guy-Richard Koné ◽  
Gabaze André Gadji ◽  
Agness Essoh Jean Eudes Yves Gnagne ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Ivory Coast ◽  
Eutrophic Lake

Relationship between spectral reflectance and chlorophyll-a concentration in the eutrophic Lake Togo-ike

2014 ◽  
Author(s):  
Y. Sakuno ◽  
K. Hatakeyama ◽  
Y. Miyamoto ◽  
A. Hatsuda ◽  
A. Mori ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Spectral Reflectance ◽  
Eutrophic Lake ◽  
Chlorophyll A Concentration

scholarly journals Field evidence of the influence of aquatic macrophytes on water quality in a shallow eutrophic lake over a 13-year period

2014 ◽  
Vol 26 (2) ◽  
pp. 176-185 ◽  
Author(s):  
Edélti Faria Albertoni ◽  
Cleber Palma-Silva ◽  
Claudio Rossano Trindade Trindade ◽  
Leonardo Marques Furlanetto
Keyword(s):  
Water Quality ◽  
Chlorophyll A ◽  
Aquatic Macrophytes ◽  
Eutrophic Lake ◽  
Nutrient Concentrations ◽  
Suspended Material ◽  
Water Characteristics ◽  
Field Evidence ◽  
Water State ◽  
Macrophyte Growth

AIM: The main objective of this work is to describe the changes in water characteristics of a shallow subtropical lake, in periods with and without growing of macrophytes, related to periods of clear-macrophyte dominance and turbid-phytoplankton dominance states. METHODS: The study was conducted in Biguás Lake, in the south coastal plain of Brazil (32° 04' 43" S and 52° 10' 03" W). Samplings were carried out monthly between October 2000 and November 2013. The limnological variables measured in the water column were dissolved oxygen (DO), water temperature, pH, electrical conductivity (EC), chlorophyll-a, total nitrogen (TN), total phosphorous (TP) and suspended material (SM). Data were grouped according to periods with macrophyte growth dominance (MD) and without macrophytes, with phytoplankton dominance (PD), and applied t- tests among TP, TN, Chlorophyll-a and SM. During macrophyte growth we estimated the coverage (%) and biomass variation of plants. RESULTS: Over the 13 years, the lake was well oxygenated, alkaline, and with a temperature variation according to subtropical seasonality. The lower values of all of the limnological variables were verified during periods of macrophyte growth, characterizing periods of clear and turbid waters. CONCLUSIONS: The influence of aquatic macrophytes in improving water quality in this shallow lake during the studied period, reducing nutrient concentrations, chlorophyll-a and suspended material in water, favoring the maintenance of a clear water state, was verified.

Estimation of Chlorophyll-a Concentrations in a Highly Turbid Eutrophic Lake Using a Classification-Based MODIS Land-Band Algorithm

2019 ◽  
Vol 12 (10) ◽  
pp. 3769-3783 ◽  
Author(s):  
Junsheng Li ◽  
Min Gao ◽  
Lian Feng ◽  
Hongli Zhao ◽  
Qian Shen ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Eutrophic Lake

scholarly journals Temperature Dependence of Freshwater Phytoplankton Growth Rates and Zooplankton Grazing Rates

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1591
Author(s):  
Jennifer Pulsifer ◽  
Edward Laws
Keyword(s):  
Temperature Dependence ◽  
Chlorophyll A ◽  
Growth Rates ◽  
Eutrophic Lake ◽  
Phytoplankton Growth ◽  
Type I ◽  
Zooplankton Grazing ◽  
Temperature Range ◽  
Freshwater Phytoplankton ◽  
Louisiana State University

Phytoplankton growth rates and zooplankton grazing rates were estimated on 16 occasions over a period of 17 months in University Lake, a highly eutrophic lake on the campus of Louisiana State University. Phytoplankton growth rates and chlorophyll a concentrations averaged 1.0 ± 0.2 d−1 and 240 ± 120 mg m−3, respectively. Chlorophyll a concentrations were at or above the inflection point of the Holling type I curve that described the relationship between zooplankton grazing rates and chlorophyll a concentrations. In most cases, it was necessary to dilute lake water by more than a factor of 4 before zooplankton grazing rates became sensitive to chlorophyll a concentrations. Chlorophyll a concentrations were positively correlated with temperature and were roughly fourfold higher at 30 °C than at 15 °C. An analysis of the temperature dependence of the growth rates and grazing rates in this study and 87 other paired estimates of limnetic phytoplankton growth rates and zooplankton grazing rates revealed virtually identical temperature dependences of growth rates and grazing rates that were very similar to the temperature dependence predicted by the metabolic theory of ecology. Phytoplankton growth rates exceeded zooplankton grazing rates by 0.13 ± 0.05 d−1 at all temperatures over a temperature range of 8.5–31.5 °C. The Q10 for both phytoplankton growth rates and zooplankton grazing rates was 1.5 over that temperature range.

Use of Lake Fossil Diatom Assemblages to Determine Historical Changes in Trophic Status

1989 ◽  
Vol 46 (6) ◽  
pp. 1013-1021 ◽  
Author(s):  
M. Agbeti ◽  
M. Dickman
Keyword(s):  
Chlorophyll A ◽  
Total Phosphorus ◽  
Trophic Status ◽  
Eutrophic Lake ◽  
Regression Analyses ◽  
Diatom Assemblages ◽  
Trophic Index ◽  
Trophic Changes ◽  
Classification Index ◽  
Oligotrophic Condition

Based on the composition of surface sediment diatom assemblages of 30 lakes a classification index for lake trophic status was developed. The lakes were selected to represent a continuum ranging from oligotrophic to eutrophic lake types. A trophic index quotient was derived. The log diatom inferred trophic index (D.I.T.I.) was regressed against the trophic status of the lakes as determined by the log total phosphorus (r = 0.84) and log chlorophyll-a (r = 0.91). Multiple regression analyses showed significant correlations between log D.I.T.I. and the log percentage abundances of oligotrophic, mesotrophic, and eutrophic species (r = 0.89). The abundance of the trophic indicator diatom species depends not only on total phosphorus and chlorophyll-a, but possibly on the interaction of these with other factors. Using this approach, past trophic changes were inferred for oligotrophic Barbara Lake and eutrophic Chemung Lake. The study suggested that Barbara Lake had retained its present day oligotrophic condition over the last 200 yr, whereas major trophic changes have occurred in Chemung Lake.

scholarly journals Prediction of the Dynamics of Total Chlorophyll-a in the Waters of the Ebrie Lagoon, Abidjan (Ivory Coast)

2021 ◽  
Vol 9 (5) ◽  
pp. 114
Author(s):  
Yapo Habib Kpidi ◽  
Georges Stephane Dembele ◽  
Tiama Guy Ballet ◽  
Esmel Amari ◽  
Ossey Bernard Yapo ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Ivory Coast ◽  
Total Chlorophyll

scholarly journals Spatial-Seasonal variations of Chlorophyllous biomass (Chlorophyll a) in the Upper Bandama basin of Ivory Coast

2019 ◽  
Vol 5 (6) ◽  
pp. 149-154
Author(s):  
Tiéligounon Ali Soro ◽  
Lozo Roméo N’Guessan ◽  
Kouassi Blé Alexis Tardy ◽  
Coulibaly Lacina ◽  
Gooré Bi Gouli
Keyword(s):  
Chlorophyll A ◽  
Seasonal Variations ◽  
Ivory Coast

ESTIMATION OF CHLOROPHYLL a FROM TIME SERIES MEASUREMENTS OF HIGH SPECTRAL RESOLUTION REFLECTANCE IN AN EUTROPHIC LAKE

1998 ◽  
Vol 34 (2) ◽  
pp. 383-390 ◽  
Author(s):  
John F. Schalles ◽  
Anatoly A. Gitelson ◽  
Yosef Z. Yacobi ◽  
Amy E. Kroenke
Keyword(s):  
Time Series ◽  
Chlorophyll A ◽  
Spectral Resolution ◽  
Eutrophic Lake ◽  
High Spectral Resolution

Parameterization of chlorophyll a-specific absorption coefficients and effects of their variations in a highly eutrophic lake: a case study at Lake Kasumigaura, Japan

Hydrobiologia ◽  
2012 ◽  
Vol 691 (1) ◽  
pp. 157-169 ◽  
Author(s):  
Kazuya Yoshimura ◽  
Nobuhiro Zaitsu ◽  
Yuta Sekimura ◽  
Bunkei Matsushita ◽  
Takehiko Fukushima ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Eutrophic Lake ◽  
Lake Kasumigaura ◽  
Absorption Coefficients ◽  
Specific Absorption
Sign in / Sign up

Export Citation Format

Share Document