01-05 December 2025
INCOIS, Hyderabad, India.
| Abstract Submission No. | ABS-05-0222 |
| Title of Abstract | Effect of episodic event cyclonic storm ⿿Daye on the microzooplankton community structure in the north-eastern coastal waters of India: A spatial and temporal comparison. |
| Authors | Aishee Bhowal*, Jasmine P, Alfisa Siddique, Haritha Prasad |
| Organisation | University of Calcutta; Zoological Survey of India |
| Address | R R Pally, Boral Kolkata, West Bengal, India Pincode: 700154 E-mail: bhowal.aishee@gmail.com |
| Country | India |
| Presentation | Oral |
| Abstract | The Cyclonic storm (CS) Daye, which made landfall on the northern Andhra Pradesh coast, India, during the summer monsoon (SM) season of 2018, had a pronounced effect on the physico-chemical conditions as well as the biological community (especially the microzooplankton) in the affected region. In this study, we have analysed the effect of the cyclone on the microzooplankton population in a regional (spatial scale) by comparing the microzooplankton community structure across three study zones with varying levels of cyclone impact (High, moderate, least) during SM 2018, and on an inter-annual basis (temporal scale) by comparing the microzooplankton community structure across three summer seasons (2018, 2019 and 2021) in the same region (Andhra Pradesh). The study region, highly impacted by CS Daye, witnessed distinct environmental parameter changes such as lower sea water temperature, lower chlorophyll a concentration, high salinity and changes in nutrient concentrations. The average abundance of microzooplankton (MCZ) was reduced in the post-cyclone high-impact region stations. When comparing MCZ community structure on a temporal scale, it was observed that the overall MCZ abundance was much lower in SM 2018 (the year of the cyclone) compared to the other two years (SM 2019 and SM 2021) when there was no cyclone at that time. Indicator species analysis was performed, which revealed the ciliate species Epiplocyloides ralumensis and the copepod nauplii stage III as indicator species in both the temporal as well as spatial analyses. Considering both scales of comparison, it can be inferred that the environmental factors in the Andhra Pradesh region during SM 2018 showed noticeable effects of the meteorological phenomenon, which in turn brought about changes in the biological parameters (the MCZ community structure). |
| Are you part of IIOE-2 endorsed project | no |
| Keywords | marine plankton, protist, Bay of Bengal, Indian Ocean, cyclone impact |
| For Awards | yes |
| Date Of Birth | 20-01-1993 |
| ECSN Registration Number | IIOE2-ECSN-0218 |