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- Title
EFFECT OF IN SITU EXPERIMENTAL SHADING ON THE PHOTOSYNTHESIS OF CANADIAN WATERWEED (ELODEA CANADENSIS) FROM SONGKHLA LAGOON, THAILAND.
- Authors
P., CHOTIKARN; P., KAEWCHANA; A., PRATHEP; P., ROEKNGANDEE; S., SINUTOK
- Abstract
Macrophytes play an important role in providing habitat structure, nutrient cycling and improvement of water quality in freshwater ecosystems. However, increasing human population and the industrial revolution during past several centuries have increased the utilization of natural resources and have caused strong changes in the structure and function of the environment, such as high sedimentation that decreases light penetration. This study investigated the effects of in situ experimental shading on photosynthetic performance of submerged Elodea canadensis macrophytes and identified the level of light that is critical for growth and photosynthesis of this species. Photosynthetic performance, chlorophyll a and b concentrations, organic and carbon contents, percentage cover, and morphology were estimated in E. canadensis from middle of Songkhla lagoon under 4 treatments (25, 50, 75, and 100% of natural light) for 10 weeks. The results show that there were no differences in growth and photosynthesis among the treatments, but low light led to changes in chlorophyll concentration, Fv/Fm, and Ik, suggesting adaptations to a low light regime. This study provides an understanding of physiological tolerance and response to shading and shows how species of aquatic macrophytes respond to future climatic and anthropogenic changes, thereby supporting development of sustainable lagoon management plans.
- Subjects
THAILAND; WATER quality; SUSTAINABLE development; PHOTOSYNTHESIS; LAGOONS; NATURAL resources; CLIMATE change; CHLOROPHYLL in water; NUTRIENT cycles
- Publication
Applied Ecology & Environmental Research, 2021, Vol 19, Issue 3, p2593
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1903_25932604