Evaluation of Potential Factors affecting the Distribution of Mysids (Crustacea: Mysidacea) in Puttalam Lagoon, Sri Lanka
Limited information is available on mysids in estuarine systems in Sri Lanka. Present study attempts to find out the distribution of mysids in Puttalam lagoon and also to evaluate the possible factors affecting its distribution. The spatial distributional survey recorded 30 mysid habitats. Mesopodopsis zeylanica, Mesopodopsis orientalis and a new Sirella srilankensis were identified, with M. orientalis being the most abundant and widely distributed species. Survey of temporal variation in mysid abundance was also carried out at two sites for a six months period. This collection of M. orientalis was the first record in Sri Lanka. Distribution of mysid species is primarily dependent on the salinity. Other than the salinity distribution, and abundance of mysids depend on water level and boundary conditions. The occurrence of mysids exhibited a strong positive correlation (P ≤ 0.01) with boundary condition of the lagoon, while presence of garbage, water level, and salinity correlated negatively. Furthermore, species distribution were strongly and positively correlated (P ≤ 0.01) with boundary conditions and negatively correlated with salinity and presence of garbage. The occurrence of M. zeylanica depended on low salinity level while M. orientalis and S. srilankensis depended on high salinity. Lower water levels and boundary vegetation were more favorable for mysids along with sites consisting of mangroves or widespread seagrass beds while soil filled boundary areas and waste disposal sites along the boundary were found to be unsuitable. Reforestation and restoration of mangrove boundary areas can enhance the biodiversity in the lagoon.
Copyright (c) 2020 International Journal of Environment
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
The author(s) acknowledge that the manuscript submitted is his/her/their own original work; all authors participated in the work in a substantive way and are prepared to take public responsibility for the work; all authors have seen and approved the manuscript as submitted; the manuscript has not been published and is not being submitted or considered for publication elsewhere; the text, illustrations, and any other materials included in the manuscript do not infringe(plagiarism) upon any existing copyright or other rights of anyone.
Notwithstanding the above, the Contributor(s) or, if applicable the Contributor’s Employer, retain(s) all proprietary rights other than copyright, such as Patent rights; to use, free of charge, all parts of this article for the author’s future works in books, lectures, classroom teaching or oral presentations; the right to reproduce the article for their own purposes provided the copies are not offered for sale.
The copyright to the contribution identified is transferred to IJE.