Phytoplankton community dynamics during Asian monsoon system preponderate in the coastal waters of northern region of Arabian sea boarding Pakistan

Khokhar, Farah Naz; Burhan, Zaib-Un-Nisa; Naz, Tahira; Abassi, Javed; Ahmad, Naveed; Ali, Amjad; Iqbal, Pervaiz; Siddiqui, Pirzada Jamal Ahmed

doi:10.30848/pjb2020-2(28)

Cited by 4 publications

(3 citation statements)

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“…In contrast to diatoms, dinoflagellates seldom occurred in the studied ponds, as has also been observed in the coastal waters near Karachi [89,90], but this is definitely not a rule, as other studies on phytoplankton in Pakistani near-shore coastal waters [91] and tidal creeks [92] showed a high diversity and abundance of said dinoflagellates. It is known that this coastal belt receives high domestic industrial and agricultural discharges (originating from dumps into different river channels), which carry high quantities of dissolved nutrients, significantly contributing to a high primary productivity of these waters [92,93].…”

Section: Discussionsupporting

confidence: 49%

Assessment of Hydrobiological and Soil Characteristics of Non-Fertilized, Earthen Fish Ponds in Sindh (Pakistan), Supplied with Seawater from Tidal Creeks

Fatima

Abbas

Kasprzak

2022

Water

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In this study, the suitability of four earthen, seawater ponds located in the Thatta district of Sindh province (Pakistan) was evaluated for the purpose of semi-intensive mariculture, which remains to be a severely underdeveloped branch of the agricultural industry of this populous Asian country. Initial pond soil probes were promising, as they showed a high clay and silt content. Monthly water samples were obtained in the year 2019 (from January to December), which allowed for the monitoring of water parameters, as well as the identification and relative quantification of planktic populations. As a result, the monthly variations of basic water parameters were found within optimal ranges for planktic growth (water temperature, salinity, pH, transparency, and dissolved oxygen). Bacillariophyta was the largest phytoplanktic group, with the most dominant species being Sundstroemia setigera, followed by the cyanobacteria Oscillatoria limosa. Copepoda was the most numerous group of identified zooplankton, followed by tintinnids and foraminiferans. Total suspended solids (TSS) calculations indicated up to nine-fold month-to-month reductions of planktic biomass, observed in the form of diminishing Bacillariophyta (December) and Copepoda (June and December). In conclusion, the studied ponds appear to be suitable for semi-intensive mariculture activity due to the abundance of diverse planktic forms (mainly Copepoda—preferable natural food for commercially important fish species), which was achieved even without the use of fertilizers. However, significant drops of planktic biomass may still occur, which implies the need for regular water monitoring procedures, which would in turn allow fish producers to implement periodical adjustments to the administered feeding rates with artificial diets.

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Section: Discussionsupporting

confidence: 49%

Assessment of Hydrobiological and Soil Characteristics of Non-Fertilized, Earthen Fish Ponds in Sindh (Pakistan), Supplied with Seawater from Tidal Creeks

Fatima

Abbas

Kasprzak

2022

Water

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“…Apart from nutrients, fluctuation in temperature is responsible to curb primary productivity of water (Simmons et al, 2004). Several studies have been reported on the primary productivity and water quality assessment in fresh and brackish water bodies as well as in fish and shrimp ponds by (Hossain et al, 2007;Sahni and Yadav, 2012;Harney et al, 2013;Akter et al, 2015;Abbas et al, 2015;Abbasi et al, 2016;Durge et al, 2018;Ogbuagu et al, 2019;Akinpelu et al, 2019;Martins et al, 2020;Mermillod-Blondin, 2020;Khokhar et al, 2020). Worldwide, the study of planktonic abundance has been done under the priority in aquaculture ponds to assess the health of water but no prior study was reported on marine water ponds situated at Thatta district, Sindh, except coastal water of Arabian Sea, tidal creeks, lakes and fresh water ponds in Pakistan.…”

Section: Asma Fatima* Ghulam Abbas and Shahnaz Rashidmentioning

confidence: 99%

A Preliminary Investigation of Phytoplankton and Zooplankton Diversity in Marine Water Ponds, Thatta, Sindh, Pakistan

Fatima¹,

Abbas²,

Rashid³

2022

SJA

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“…A number of potential blooms forming species have been reported from coastal waters of Pakistan in the northern Arabian Sea (Saifullah and Chaghtai, 1990;Baig et al, 2006). In general, reports on phytoplankton from Pakistan are scarce and only a few studies are (Latif et al, 2013;Khokhar et al, 2018Khokhar et al, , 2020 and the remaining contributions are restricted to taxonomy and coastal waters (Munir et al, 2011(Munir et al, , 2013(Munir et al, , 2015Mansoor and Saifullah, 1995). The few reports on dinoflagellates were available on growth rate and seasonal abundance (Munir et al, 2016;Khokhar et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Distribution and abundance of dinoflagellates from the coastal waters of Karachi, Pakistan, northern part of the Arabian Sea

et al. 2022

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The present study reports on seasonal and spatial variations in diversity, distribution and abundance of dinoflegellates and indicates the presence of HAB species in Pakistan waters. A total of 179 taxa, recorded in this study from offshore and near-shore waters, belong to 41 genera in 26 families and 10 orders. The high species count (149 species) was recorded from Manora Island offshore station (MI-1) and 105 spp, 109 spp and 115 spp were encountered from the Mubarak village offshore station (MV-1), Manora near shore station (MI-2) and Mubarak Village near-shore station (MV-2) respectively. Tripos furca was the dominant and frequently occurring species (> 1 x103 to > 25 x103 cells L-1 from coastal and >1x 105 cells L-l from near-shore stations) in addition to less abundant Alexandrium catenella, Alexandrium sp., Alexandrium minutum, and Prorocentrum micans (>103 to 25x 103cells/L). Another 44 species occurred in relatively low numbers (<103 cell L-l). Seventy species were found throughout the study period at all four stations. High number of species in three genera (Tripos (38), Protoperidinium (34) and Prorocentrum (20) was recorded. Potently toxic (16 genera 43 species) and HAB related (19 genera and 30 species) dinoflagellate taxa were also recorded. The percent contribution of dinoflagellates in total phytoplankton population generally remained below 20% except for a few instances. Manora Island stations had comparatively higher Shannon index and equitability and slightly lower dominance index. The PCA plot showed strong positive correlation among chlorophyll-a concentration, dissolved oxygen, total number of phytoplankton and dinoflagellates.

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Phytoplankton community dynamics during Asian monsoon system preponderate in the coastal waters of northern region of Arabian sea boarding Pakistan

Cited by 4 publications

References 0 publications

Assessment of Hydrobiological and Soil Characteristics of Non-Fertilized, Earthen Fish Ponds in Sindh (Pakistan), Supplied with Seawater from Tidal Creeks

Assessment of Hydrobiological and Soil Characteristics of Non-Fertilized, Earthen Fish Ponds in Sindh (Pakistan), Supplied with Seawater from Tidal Creeks

A Preliminary Investigation of Phytoplankton and Zooplankton Diversity in Marine Water Ponds, Thatta, Sindh, Pakistan

Distribution and abundance of dinoflagellates from the coastal waters of Karachi, Pakistan, northern part of the Arabian Sea

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