Overal objective is to understand different inpacts of oceanography processes on funtional and structure of plankton communities in the South Central shelf of Viet Nam. The specific objects includes: improve understanding of biological and oceanography processes on the shelf to provide scientific bases in assessment of fishery resources; toward the protection of fishseries resources and ensure food security under the climate changes; to increase publications and international scietific exchanges on science of the Viet Nam’s shelf and increasing the research on the shelf as well as in Viet Nam’s EEZ zone.

- Theoretical results: Analysis longterm data and in situ data provided proofs of shelf-break front on south centre Viet Nam shelf caused by physical oceanography factors. The shelf-break front formed at the shelf slop as the boundary between alongshore currents on shelf and the South China Sea western boundary current (SCSWBC), more notable at the north of Cape Varella.
Impacts on plankton community was mainly due to available nutrients for phytoplankton both at coastal waters and at the shelf slope. These impacts on plankton communities structure, especially Chl-a and zooplankton, were different in water column, not clear on the upper water but on chl-a maxium and bottom layers. The impact on coastal waters was due to nutrients discharges from land and coastal zone. Impacts on the shelf slope was from upwelling (from shelfbreak front) bring deep rich nuitrients from the deep waters to subsurface.
3D modelling of current showed short term but stable pair of small eddies including an clockwise (near shore) and a anticlockwise (offshore) eddies at the north of Cape Varella. There was another clockwise eddies close to shore at the south of Cape Varella. The results from 3D model consistent with the in situ current pattern. The model results also consistent with HYCOM+CICE (Metzger et al. 2017) simulation at resolution 1/12o at the field-trip time of the project.
- Applied results: Results of the project providing scientific basis for evaluation of food resources for the fisheries on Viet Nam south central shelf. The results, especially collected data will be usefull for futher analysis for oceanography, biological oceanography and/or climate channges.

Data collected on the shelf are new for science not only for Viet Nam but also for international scientific communities. The projects provided important on plankton traits in the shelf-break front are; providing scientific evidents of the activities of the shelf-break front for the first time in Viet Nam, upwelling at the shelf margin during the spring intermonsoon.

- Scientific papers in referred journals (list):
SCIE (Q2/3) papers
Doan-Nhu, H., & Nguyen-Ngoc, L. (2021). On the genus Alisphaera (Alisphaeraceae, Haptophyta) including a new species A. memoria sp. nov. in the South China Sea. Nova Hedwigia, 281-290.
Nguyen-Ngoc, L., Doan-Nhu, H., Phan-Tan, L., Huynh-Thi, D. N., Nguyen-Tam, V., Pham, A. H., ... & Tester, P. (2022). Seasonal occurrence of the potentially toxic benthic armoured dinoflagellates in Nha Trang Bay, South Central Coast of Viet Nam. Regional Studies in Marine Science, 55, 102627.
Huynh, N. D. T., Nguyen-Ngoc, L., Voss, M., & Doan-Nhu, H. (2022). Dinoflagellate Tripos furca and Tripos fusus niches in the South China Sea: Maximum entropy assessment of environmental factors. Regional Studies in Marine Science, 55, 102601.
VAST2 paper
Nguyen, T.V., D.T.N. Huynh, H, Doan-Nhu. (2023). Copepod vertical diel migration in central shelf Viet Nam. Academia Journal of Biology, 45(1): 65-75. https://doi.org/10.15625/2615-9023/17940

Further analysis of the data abtained from the project is needed. There should by further investigation, intensively  in scale and geography to confirm findings as well as discovery other processes.