Phytoplankton assemblage and chlorophyll a along the salinity gradient in a hypoxic eutrophic tropical estuary-Ulhas Estuary, West Coast of India

Niveditha, S. Krishna; Haridevi, C K; Hardikar, Revati; Ram, Anirudh

doi:10.1016/j.marpolbul.2022.113719

Cited by 12 publications

(3 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Satellite remote sensing has been used as a valuable tool to support monitoring water quality, especially chlorophyll-a concentration [39,40]. Compared to traditional monitoring methods, remote sensing offers great temporal and spatial coverage and can estimate the water quality of non-accessible water bodies [41].…”

Section: Discussionmentioning

confidence: 99%

“…There is no clear link between upwelling and the abundance of phytoplankton in cold water. On the other hand, the gradual rise of chlorophyll-a concentration is related to industrial wastewater consisting of organic synthetic substances or heavy elements and discharging to the environment, hence increasing chlorophyll-a concentration [39].…”

Section: Mapping Chlorophyll-a Concentrationmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Human-Induced Effects on Sea/Brackish Water Chlorophyll-a Concentration in Ha Long Bay of Vietnam with Google Earth Engine

et al. 2022

View full text Add to dashboard Cite

Chlorophyll-a is one of the most important water quality parameters that can be observed by satellite imagery. It plays a significant function in the aquatic environments of rapidly developing coastal cities such as Ha Long City, Vietnam. Urban population growth, coal mining, and tourist activities have affected the water quality of Ha Long Bay. This work uses Sentinel-2/Multispectral Instrument (MSI) imagery data to a calibrated ocean chlorophyll 2-band (OC-2) model to retrieve chlorophyll-a (chl-a) concentration in the bay from 2019 to 2021. The variability of chlorophyll-a during seasons over the study area was inter-compared. The chlorophyll-a concentration was mapped by analyzing the time series of water cover on the Google Earth Engine platform. The results show that the OC-2 model was calibrated well to the conditions of the study areas. The calibrated model accuracy increased nearly double compared with the uncalibrated OC-2 model. The seasonal assessment of chl-a concentration showed that the phytoplankton (algae) developed well in cold weather during fall and winter. Spatially, algae grew densely inside and in the surroundings of aquaculture, urban, and tourist zones. In contrast, coal mining activities did not result in algae development. We recommend using the Sentinel-2 data for seawater quality monitoring and assessment. Future work might focus on model calibration with a longer time simulation and more in situ measured data. Moreover, manual atmospheric correction of optical remote sensing is crucial for coastal environmental studies.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Mapping Chlorophyll-a Concentrationmentioning

confidence: 99%

Assessment of Human-Induced Effects on Sea/Brackish Water Chlorophyll-a Concentration in Ha Long Bay of Vietnam with Google Earth Engine

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Chl a concentration is an important basis for estimating marine living resources, which is of great significance for the development of marine fishery resources (Liu et al, 2019). In addition to being directly affected by the phytoplankton community composition, phytoplankton biomass is also affected by nutrient concentration and structure (Anderson et al, 2022;Niveditha et al, 2022), climate (Golubkov et al, 2021), hydrodynamic conditions (Wang et al, 2021), ocean circulation (Chen et al, 2021;Komorita et al, 2021), and other factors. The Chl a concentration in water is an important indicator to characterize phytoplankton biomass, which to some extent reflects the ability of phytoplankton to produce organic carbon through photosynthesis (Duan et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Spatial and seasonal variations of chlorophyll a in Zhanjiang Bay, China, and controlling factors

Wang,

Zhou,

Chen

et al. 2024

Front. Mar. Sci.

View full text Add to dashboard Cite

Based on on-site survey data from 26 stations in the surface seawater of Zhanjiang Bay in April (spring), July (summer), September (autumn), and December (winter) of 2017, the spatial distribution characteristics of chlorophyll a (Chl a) and nutrients in the surface seawater of Zhanjiang Bay in different seasons were analyzed, and the regulatory mechanism of chlorophyll a spatiotemporal changes was discussed. The results showed that the Chl a concentrations in the surface water of Zhanjiang Bay are 0.44–37.43 μg/L, and are highest in summer and lowest in spring (summer: 11.6 µg/L; winter: 11.5 µg/L; autumn: 10.7 µg/L; spring: 1.8 µg/L). The spatial distribution of surface seawater Chl a in different seasons shows an opposite trend to the spatial distribution of nutrients. The study revealed that the low Chl a concentration in spring is mainly limited by SiO3-Si, while the high Chl a concentration in winter is closely related to climate conditions and coastal currents. This study suggests that based on the influence of monsoon climate and land rainfall erosion, the particulate organic carbon (POC) in Zhanjiang Bay in spring and summer is derived from land-based inputs, while in autumn and winter, the POC in the surface water of Zhanjiang Bay is mainly derived from in situ phytoplankton production. The dominant factors affecting the distribution of Chl a in the surface water of Zhanjiang Bay vary in different seasons, and are comprehensively influenced by terrestrial nutrient transport, artificial aquaculture, climate conditions, hydrodynamic conditions in the bay, and the coastal current of western Guangdong outside of the bay. The results of this study can provide scientific basis for improving the environment of Zhanjiang bay.

show abstract

The effect of the tidal cycle on the phytoplankton community assemblage in a mangrove-dominated tropical tidal creek

Dhanalakshmi,

Akter,

Gogoi

et al. 2024

Environ Monit Assess

View full text Add to dashboard Cite

Phytoplankton assemblage and chlorophyll a along the salinity gradient in a hypoxic eutrophic tropical estuary-Ulhas Estuary, West Coast of India

Cited by 12 publications

References 52 publications

Assessment of Human-Induced Effects on Sea/Brackish Water Chlorophyll-a Concentration in Ha Long Bay of Vietnam with Google Earth Engine

Assessment of Human-Induced Effects on Sea/Brackish Water Chlorophyll-a Concentration in Ha Long Bay of Vietnam with Google Earth Engine

Spatial and seasonal variations of chlorophyll a in Zhanjiang Bay, China, and controlling factors

The effect of the tidal cycle on the phytoplankton community assemblage in a mangrove-dominated tropical tidal creek

Contact Info

Product

Resources

About