Microplankton dynamics of a coastal lagoon, Chilika: interactive effect of environmental parameters on microplankton groups

Abstract

Microplankton population of Asia’s largest coastal lagoon Chilika was studied for five major groups, bacillariophyceae, cyanophyceae, chlorophyceae, dinophyceae, rotifera, and tintinninae. The study reported presence of 233 species of microplankton whose average annual abundance was 1631 cells/l. The physicochemical parameters contributing to the spatio-temporal fluctuations in microplankton diversity, abundance, and community structure were identified as salinity, pH, DO, nitrate, and silicate. Salinity, transparency, depth, and silicate most explained the abundance of bacillariophyceae; nitrate, pH, and DO influenced cyanophyceae; salinity, transparency, and chlorophyll concentration influenced chlorophyceae; salinity, depth, and water temperature influenced dinophyceae; salinity, free CO2, and nitrate-influenced rotifers, whereas salinity, pH, DO, and depth influenced tintinnids. Biotic-abiotic relationships revealed particular preference of environmental conditions at species level in groups like bacillariophyceae, cyanophyceae, and dinophyceae. Although the lagoon is shallow, bacillariophyceae-environment interaction showed depth can be a critical factor for species like Aulocoseira sp., Amphipleura sp., and Rhophalodia sp. Species of dinoflagellates like Dinophysis caudata, Noctiluca scintillans, and Protoperidinium proliferated in lower level of silicate. Unlike other cyanophyceae species Streptococcus sp., Chroococcus sp., Diplococcus sp., Aphanocapsa sp., and Gloeocapsa sp. were negatively influenced by nitrate concentration. The study provides better scope for ecological management of the lagoon with respect to conserving biodiversity and hydrological quality of the ecosystem.

Phytoplankton dynamics and bloom events in oligotrophic Mediterranean lagoons: seasonal patterns but hazardous trends

“…Parallel to that, an association between lower salinity and higher bloom probability was detected, diatoms being the most involved group in these events. This contrasts with previous studies, which highlighted positive correlation between diatom blooms and salinity (Mukherjee et al, 2018).…”

NPZfc: An ecological relation based fish catch prediction model using Artificial Neural Network

“…Chilika lagoon inhabits huge biodiversity and thus a complex trophic chain. Plankton dynamics of the ecosystem also has distinct spatio-temporal variations (Srichandan et al, 2015; Mukherjee et al, 2018). These variations have a considerable effect on the forage fish population, which in turn draws the attention of ecologists to develop compartment models (Kumar and Kumari, 2015; Franks, 2002).…”

The dynamics of the plankton community on Lake Siombak, a tropical tidal lake in North Sumatra, Indonesia

“…Based on several studies in coastal lakes, including the results of this study, the richness of plankton species in Lake Siombak is higher than that in the Grove Bay Lagoon (Nias, Indonesia), namely 28 genera (Hasudungan et al 2008), a coastal lagoon in Baja California (México) there are as many as 47 genera (Gracia-Escobar et al 2014), In Lake Ebony (Jakarta, Indonesia) there are 48 species (Pratiwi et al 2018a) mainly in subtropic area; for example, there are only 32 species in Kamil Abdus¸ Lagoon, Turkey (Yilmaz et al 2018). However, the richness of this species is much lower than that in Chilika Lake, India, which reaches 233-259 genera (Srichandan et al 2015;Mukherjee et al 2018), including in Yewa Lagoon which reaches 77 genera (Effiong and Inyang 2016).…”

“…However, Obolewski et al (2018) and Cardoso et al (2019) found that plankton in a coastal lake which lacks nutrient is dominated by Cyanobakteri reaching until 80%. Nonetheless, in coastal lakes that tend to be saltier phytoplankton is generally dominated by Bacillariopyceae (Onyema 2008;Srichandan et al 2015;Mukherjee et al 2018;Yilmaz et al 2018;Cutrim et al 2019) and Dinophyceae (Hasudungan et al 2008), including in coastal waters (Ajibare et al 2019). In very dynamic waters such as an estuary, Yang et al (2019) found varied plankton dynamics in which the Chlorophyta and the Bacillariophyta were high during spring, and Cyanophyta was high during summer in Estuary Reservoir in the Yangtze River, China.…”

“…However, no research has been reported on the dynamics of plankton in tidal lakes in Indonesia. Meanwhile, tidal lakes abroad have been widely reported, for example, Yewa Lagoon, Nigeria (Effiong and Inyang 2016), Términos Lagoon, Mexico (Conan et al 2017), Chilika Lake, India (Srichandan et al 2015;Sahu et al 2016 ;Mukherjee et al 2018), Abduş Lagoon, Turkey (Yilmaz et al 2018), Temperate coastal lagoon in Ria de Aveiro, Portugal (Bueno-Pardo et al 2018), coastal lakes in Baltic Sea (Obolewski et al 2018 ), a coastal lagoon in northern Brazil (Cutrim et al 2019), Mediterranean lake (Mentzafou and Dimitriou 2019). Therefore, this study is the answer to the case on the characteristics of plankton dynamics in tropical tidal lakes in Indonesia.…”