Characterization of phytoplankton functional groups in a tropical shellfish harvesting estuary (Ashtamudi) and adjacent nearshore waters (southwest coast of India)

Anil, P.; Madhu, N.V.; Vishal, C. R.; Gopika, Ponnaratta; Jyothi, S. Jissy; Arya, Kanneth Satheesan; Gireeshkumar, T.R.

doi:10.1007/s11356-022-24537-w

Cited by 5 publications

(2 citation statements)

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“…Higher levels of total dissolved solids can often indicate pollution by an extraneous source [21]. [22] have reported the influence of various ranges of hydrobiological parameters on the density and composition of plankton. Monthly variation in plankton density and mean density of the Ganga River are presented in Table 1.…”

Section: Resultsmentioning

confidence: 99%

Seasonal Variation, Diversity, and Composition of Planktons in the Ganga River

Kumar,

Saxena,

Ram

et al. 2024

UPJOZ

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Plankton are important components of aquatic ecosystems because they contribute to primary production, which sustains fisheries and other ecosystem functions. The study was carried out over a one-year period at three Ganga River sites: Haridwar (Bhadrabad) site A1, Bijnor (Balawali) site A2, and Muzaffarnagar (Bairaj Ganga bridge) site. Bacillariphyceae made almost 65% of the phytoplankton at location A1 14% Chlorophyceae and 14% Cynophyceae. The zooplankton consisted of Protozoa (80%) and Cladocera (20%), with Ulvophyceae accounting for 7%. At location A2, the phytoplankton composition was Bacillariphyceae (79%) and Chlorophyceae (7%). ˃ Cynophyceae (7%). Ulvophyceae (7%), and zooplankton were Protozoa (80%), Rotifera (20%). At location A3, the phytoplankton mix shifted to Bacillariphyceae (70%). ˃ Chlorophyceae (18%) ˃ Cynophyceae (12%) and Protozoa (60%) Rotifera accounts for 40%. The Simpson diversity index (D) value for phytoplankton is 0.58, whereas for zooplankton, the value is 0.53. The mean plankton density at locations A1, A2, and A3 was 2059, 2959, and 3304 individuals per liter, respectively. Only dissolved oxygen in physicochemical characteristics correlated positively with plankton density; all other metrics correlated negatively.

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Section: Resultsmentioning

confidence: 99%

Seasonal Variation, Diversity, and Composition of Planktons in the Ganga River

Kumar,

Saxena,

Ram

et al. 2024

UPJOZ

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“…Some species that are sensitive to salinity changes have shown declines in abundance, while others have exhibited shifts in their distribution ranges, seeking more suitable habitats within the estuaries. Additionally, increased salinity levels have also impacted the productivity and composition of estuarine vegetation, such as mangroves, which are important habitats and provide valuable ecosystem services (Anil et al, 2023).…”

Section: Salinity Dynamicsmentioning

confidence: 99%

The effects of climate change on the hydrology, salinity, and biota of Kerala’s estuaries

Padmakumar,

Shanthakumar

2024

Acta Entomol. Zool.

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This review focuses on the significance of estuaries in Kerala, a state located on the southwest coast of India, and explores the challenges they face due to climate change. Estuaries are crucial ecosystems that support biodiversity, fisheries, tourism, and human well-being. However, their vulnerability to the impacts of climate change threatens their sustainability. We synthesize the existing literature on four major estuaries in Kerala, namely Ashtamudi, Vembanad, Chettuva, and Periyar, examining the effects of climate change on their hydrology, salinity, and biota. These estuaries are influenced by factors such as monsoon rainfall, river discharge, and tidal fluctuations. While they possess abundant natural and cultural resources, they encounter diverse environmental and socio-economic challenges. By analyzing different climate change scenarios, we investigate how these estuaries' physical and chemical characteristics are affected and the resulting implications for ecological processes and functions. Furthermore, we discuss the potential impacts of climate change on the ecosystem services provided by these estuaries and the livelihoods of the communities reliant on them. By identifying knowledge gaps and research needs, we aim to contribute to the effective management and conservation of these estuarine ecosystems in the face of a changing climate. Through this comprehensive review, we provide an overview of the present condition and prospects of the studied estuaries, emphasizing their role in sustaining the socio-ecological systems of Kerala.

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