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A Review on the Effect of Global Climate Change on Seaweed and Seagrass

Atiqur Rahman Sunny
Research Assistant
ECOFISHBD Project, WorldFish Bangladesh and South Asia

Abstract/ Executive Summary:

This study describes how global climate change influences the growth, production and reproduction of seaweed, seagrass and their associated ecosystems. All the data used in this study have been collected from numerous secondary sources. Seaweed survival, growth, and reproduction are varied with numerous environmental variables, including temperature, desiccation, wave heights, nutrient supply via upwelling and run-off, pH and carbon dioxide concentration itself. With the rising of sea levels, seagrass and seaweed habitats at any given location will experience reduced distribution and abundance. Either increases or decreases in salinity will impact seagrass and seaweed. The potential effects of increasing CO2 and the impacts of greater UV-B radiation will alter seagrass and seaweed photosynthesis and productivity. This review underscores the critical need of research on the direct effects of the various aspects of global climate change on seaweeds and seagrass.

Keywords: Climate change, Seaweed, Seagrass, Survival, Growth, Reproduction

Location: ECOFISHBD Project, WorldFish Bangladesh and South Asia

Start Date:

End Date:

Program Area: Risk Management in Agriculture

Commodity: Climate change, Seaweed

Objectives:

Developing accurate predictions for the ecological effects of global climate change should have high priority due to its importance in effective conservation and management. Some of the areas where we lack basic understanding include the importance of rate, duration and magnitude of environmental change. This study describes how global climate change influences the growth, production and reproduction of seaweed, seagrass and their associated ecosystems.

Methodology:

All the data used in this study have been collected from numerous secondary sources. Data have been accumulated by reviewing articles, reports on the effect of climate change on seaweed and seagrass. Websites on seaweed and seagrass is also an important source of information where ‘seaweed’, ‘seagrass’, ‘climate change, ‘abiotic change in coastal marine environments, ‘temperature effect’, ‘effect of sea level rise’, ‘salinity effect’, ‘effect of increasing carbon dioxide, ‘effects of UV-B radiation, etc. were the keywords of web browsing in Britannia encyclopedia. All of these gathered data were comprehensively reviewed; synthesized and relevant information was used in this study.

Source of Information: International Journal of Fisheries and Aquatic Studies 2017; 5(6): 19-22

Article Link (Online Journal):

Funding Source:

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Total Budget (Tk.) :

Achievement/Findings:

The increasing rate of global climate change seen in this century will significantly impact the earth's oceans, with large potential impacts to seaweeds and seagrasses. Both direct and indirect effects of global climate change will alter plant productivity, distribution and function. Increases in seawater temperature resulting from the greenhouse effect could have secondary impacts of changing water depth and tidal range, altered current circulation patterns, modified current velocities and increased salinity intrusion. The potential effects of increasing CO2 and the impacts of greater UV-B radiation will also alter seagrass and seaweed photosynthesis and productivity. At this point it is difficult to predict the consequences of global climate change on the seaweeds and seagrasses of any given bay or estuary; this literature review underscores the critical need for research on the direct effects of the various aspects of global climate change on seaweed and seagrass.

Knowledge Management: Journal