Hourly variation of environment and copepod community of the Ganges River Estuary of India: Perspectives on sampling estuarine zooplankton

Paul, Sourav; Karan, Samya; Ghosh, Soumik; Bhattacharya, Baby

doi:10.1016/j.ecss.2019.106441

Cited by 16 publications

(13 citation statements)

References 44 publications

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“…The abundance and diversity of zooplankton communities showed spatial, seasonal, and interannual trends in Barnegat Bay (Howson et al, 2017), and also in the Paranagua estuary (Salvador and Bersano, 2017). Worth mentioning is that Paul et al (2019) recorded extremely high value of zooplankton gatherings, with a density of 1,090,550 (Inds/m 3 ) in the estuary of the Ganges River. The different mesh sizes of nets used to collect estuarine zooplankton, ranging from 60 µm (Froneman, 2004) to 500 µm (Howson et al, 2017), might also affect the composition of the dominant species (Tseng et al, 2011a).…”

Section: Copepods In Estuariesmentioning

confidence: 95%

“…This may be an indication that predominantly estuarine species cannot easily undergo long-distance dispersal across oceans. In different parts of the world such as India (Madhu et al, 2007;Rakhesh et al, 2013;Paul et al, 2019), Europe (Vieira et al, 2003), Africa (Kibirige and Perissinotto, 2003;Froneman, 2004;Carrasco and Perissinotto, 2015;Ounissi et al, 2016), America (Krumme and Liang, 2004;Araujo et al, 2008;Howson et al, 2017;Salvador and Bersano, 2017;Breckenridge et al, 2020), and Oceania (Rose et al, 2020), it has been shown repeatedly that differences in the composition of the dominant copepod fauna in estuaries increase with distance. The abundance and diversity of zooplankton communities showed spatial, seasonal, and interannual trends in Barnegat Bay (Howson et al, 2017), and also in the Paranagua estuary (Salvador and Bersano, 2017).…”

Section: Copepods In Estuariesmentioning

confidence: 99%

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Zooplankton Fluctuations in the Surface Waters of the Estuary of a Large Subtropical Urban River

et al. 2021

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The Danshuei River has a third largest catchment area and third longest in Taiwan. It flows through the capital, Taipei, and more than six million people live within its catchment area. Its estuary is characterized by a highly variable chemical and physical environment that is affected by the interaction of inland freshwater runoff with wastewater, and toward the coast is also influenced by the China Coastal Current and the Kuroshio Current. By collecting zooplankton bimonthly in 2014 from the surface layer (0–2 m depth) at five sites in the estuary, we were able to demonstrate that the composition of the zooplankton, and particularly its copepod fraction, varied significantly among sampling stations and months, thereby revealing seasonal succession. Fourteen higher taxa or other categories of zooplankter were identified, with the following being most common taxa: Decapoda, Copepoda (including Calanoida, Cyclopoida, and Harpacticoida), and “other larvae.” The Copepoda comprised 44 taxa (including eight only identified to genus) belonging to 3 orders, 17 families, and 29 genera, the five most abundant of which were Bestiolina n. sp. (undescribed), Corycaeus spp., Parvocalanus crassirostris, Acartia sp., and Paracalanus parvus. The highest and lowest copepod abundances were recorded in July (2557.88 inds. m–3) and January (1.3 inds. m–3), respectively. Observed changes in abundance of many kinds of copepod appeared to be significantly related to changes in physico-chemical parameters (e.g., salinity, temperature, pH, and dissolved oxygen concentration). Cluster analysis confirmed the existence of distinct copepod communities, each characterized by a preference for a different set of environmental conditions. Our comprehensive literature review of the copepod biodiversity of Taiwan’s major rivers for comparison with similar data compiled for other estuaries in the world, the first time such a review has been compiled, shows that 32 copepod taxa have been recorded from the brackish and freshwater parts of the Danshuei River. They represent 58.2% of the total number of brackish- and freshwater copepod species in Taiwan, and five of them have so far only been recorded in the Danshuei River: the calanoids Acartiella sinensis and Pseudodiaptomus forbesi, the cyclopoids Oithona fragilis and Oithona simplex, and the harpacticoid Tachidius (Tachidius) discipes.

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Section: Copepods In Estuariesmentioning

confidence: 95%

Section: Copepods In Estuariesmentioning

confidence: 99%

Zooplankton Fluctuations in the Surface Waters of the Estuary of a Large Subtropical Urban River

et al. 2021

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“…Feeding guild of each sampled copepod species was reviewed from Turner (2004), Islam et al (2006), Bhattacharya et al (2015), and Paul et al (2019). In terms of feeding guilds they were classi ed either as herbivorous or carnivorous or omnivorous species.…”

Section: Study Of Feeding Guilds Of Copepodsmentioning

confidence: 99%

“…Unless disrupted by any TC mesozooplankton of Muriganga shows two peaks per year rstly in late premonsoon and secondly in middle of postmonsoon (Sarkar et al 1986), which is linked to phytoplankton bloom that precedes the peaks of zooplankton diversity and density (Biswas et al 2010). About 36 species of copepods are reported from Muriganga and other river-estuaries of Indian Sundarban (Bhattacharya et al 2015;Paul et al 2019). Abundance of copepods is generally higher in dry seasons than wet season (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…monsoon); therefore, salinity possibly limits the copepod community of Indian Sundarban (Bhattacharya et al 2015). Copepods Bestiolina similis, Acartiella tortaniformis, Pseudodiaptomus serricaudatus, Paracalanus parvus, Acartia spinicauda persist throughout the year in Muriganga and are considered as estuarine specialists who adapt quickly to the extreme changes of the estuary (Bhattacharya et al 2015;Paul et al 2019;Paul et al 2020a,b). Competition among those species is intense because their spatial niches are segregated only by a few hundred meter stretch of Muriganga (Paul et al 2019).…”

Section: Introductionmentioning

confidence: 99%

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Cyclone Amphan effects on the copepods of Ganges estuary

Paul

Karan

Bhattacharya³

2022

Preprint

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Tropical cyclones are increasingly affecting the estuarine communities. Impacts of category-5 tropical cyclone Amphan (landfall on 20 May 2020 near Ganges estuary mouth) on the copepod community of Muriganga section of Ganges estuary was studied by sampling the copepod assemblages before (February to December 2019), shortly after (31 May to 12 June 2020) and post (September to November 2020) cyclone. Hypothesis was shortly after Amphan a relatively homogenous community consists of a few estuarine specialist copepods would succeed but within months that community would be replaced by a heterogenous one but those estuarine specialists would continue their dominance. Shortly after Amphan, species richness declined but the recovery process completed within months led by herbivorous Paracalanus parvus, omnivorous Bestiolina similis, Acartia spinicauda, Acartiella tortaniformis, and carnivorous Oithona brevicornis. Spatial homogeneity of the community that prevailed in Muriganga in pre-Amphan and shorty after Amphan was lost in post-Amphan. Community composition changed from pre- to shortly after to post-Amphan. Unilateral dominance of B. similis observed in pre-Amphan was challenged by P. parvus, A. spinicauda, A. tortaniformis and O. brevicornis shortly after Amphan and in post-Amphan. Acartia spinicauda proliferated shortly after Amphan and co-dominated the estuary along with A. tortaniformis but the latter replaced the former in post-Amphan. Copepods did rebuild their community within a few months from Amphan but experienced rearrangements of species composition, abundance, dominance hierarchy and feeding guilds, which may strain benthic-pelagic linkages of Ganges estuary so shall be monitored regularly by coastal institutions following uniform methods and best practises.

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Effects of cyclone Fani on the copepod community of the Ganges River estuary of India

Paul

Karan

Bhattacharaya

2020

Environ Monit Assess

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Hourly variation of environment and copepod community of the Ganges River Estuary of India: Perspectives on sampling estuarine zooplankton

Cited by 16 publications

References 44 publications

Zooplankton Fluctuations in the Surface Waters of the Estuary of a Large Subtropical Urban River

Zooplankton Fluctuations in the Surface Waters of the Estuary of a Large Subtropical Urban River

Cyclone Amphan effects on the copepods of Ganges estuary

Effects of cyclone Fani on the copepod community of the Ganges River estuary of India

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