Abstract
Harmful algae bloom constitutes a major problem facing water bodies particularly fresh and marine water system. Microcystis aeruginosa represents a major causative organism found in the water. Light plays a major role in the growth and variation of M. aeruginosa in water. What is still inadequate, is the data on the effects of different light conditions on the growth of Microcystis aeruginosa. In this study, two strains of Microcystis aeruginosa PCC 7806 (toxic strain) and PCC 7005 (non-toxic strain) were exposed to varying light intensities at 0, 30, 60, 120, 300, 350 μMol photon m-2·S-1 to measure their growth and pigmentation. This study observed similarities in growth and pigmentation between toxic strain (PCC 7806) and non-toxic (PCC 7005) strain. Also, at short exposure to light, Toxic strain was seen to be better tolerant of light than non-toxic strain, with non-toxic strain showing better ability to recover from light stress after twenty days of culture. These findings suggest that Toxic strain (PCC 7806) and Non-toxic strain (PCC 7005) of M. aeruginosa respond similarly with respect to growth but differ in their light retention capacity over time and this could be useful in predicting the possible conditions of algal bloom.
Highlights
These findings suggest that Toxic strain (PCC 7806) and Non-toxic strain (PCC 7005) of M. aeruginosa respond with respect to growth but differ in their light retention capacity over time and this could be useful in predicting the possible conditions of algal bloom
The results in this study indicate that growth occurs virtually across all the light intensity levels
This study confirms that the two strains of M. aeruginosa has the capacity to withstand high light intensities as high as 350 μMol photon m−2·S−1
Summary
Harmful algal bloom (HABs) represents a major problem across the world, par-. Cyanobacteria is known to be the primary organism causing algal bloom. These contaminated water bodies contain hepatotoxins which are health hazards to humans and animals [1]. Cyanobacteria are phytoplankton species that occur in fresh and brackish water systems across the world [2] [3]. Studies into the dynamics of cyanobacterial blooms predict that the expected increase in global temperature will result in increased surface water temperatures and thermal stratification as well as change meteorological patterns possibly stimulating increased cyanobacterial growth rates [4] and higher frequency of bloom events
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
