Eutrophication and warming-driven green tides (Ulva rigida) are predicted to increase under future climate change scenarios

Gao, Guang; Clare, Anthony S.; Rose, Craig; Caldwell, Gary S.

doi:10.1016/j.marpolbul.2016.10.003

Cited by 135 publications

(112 citation statements)

References 70 publications

(50 reference statements)

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“…Although macroalgal blooms may be attributed to multiple factors, including climate warming and marine acidification (Gao, Clare, Rose, & Caldwell, ), appropriate hydrographic events (Lavery, Lukatelich, & McComb, ), and even alien species immigration (Yabe et al, ; Yoshida, Uchimura, & Hiraoka, ), numerous studies still consider the primary factor associated with green tide formation to be marine eutrophication. The interpretation on the mechanism of green tide formation is based only on the fact that excess nutrients can stimulate rapid algal growth (Morten Foldager & Jens, ).…”

Section: Changes In Marine Nutrients and Green Tides In The Yellow Seamentioning

confidence: 99%

Macroalgal blooms caused by marine nutrient changes resulting from human activities

Wang

2020

Journal of Applied Ecology

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Macroalgal blooms (green tides) are occurring more frequently in many regions of the world, leading to significant impacts on marine ecology and economies. Although many studies and hypotheses have been proposed, the exact mechanism of green tide formation remains unclear. The world's largest green tides recur in the Yellow Sea and this area is representative for studying the origin and mechanism of green tide formation. We conducted a meta‐analysis of studies related to green tides and associated hypotheses for their formation. Rapid industrialization/urbanization and environmental protection actions in coastal zones have led to an increase in nitrate (nitrite) and decline in ammonium (ammonia), and this has resulted in increasing levels of dissolved inorganic nitrogen in seawater. We found that presence of appropriate attachment substrates for Ulva including laver culture rafts and certain hydrological conditions are supplementary factors to green tide formation in the Yellow Sea. Changes in marine nutrient levels promote the production of nitric oxide, which is essential for Ulva sporulation. Consequently, numerous spores are created and attach to substrates including laver culture rafts and parent Ulva thalli. These spores then develop into new thalli that are capable of producing further spores. As a result, Ulva thalli rapidly occupy vast areas of the sea and develop into green tides. Synthesis and applications. Our synthesis identifies that escalating marine nitric oxide generation caused by various factors and its essential role in Ulva sporulation are underlying and significant components in the mechanism of green tide formation. We provide solutions such as the improvement of comprehensive management of aquaculture and strict restriction of marine nitrate pollution, to prevent green tides. Furthermore, we propose an innovative wastewater treatment programme combined with Ulva application to fulfil the standard of sustainable development and circular economy.

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Section: Changes In Marine Nutrients and Green Tides In The Yellow Seamentioning

confidence: 99%

Macroalgal blooms caused by marine nutrient changes resulting from human activities

Wang

2020

Journal of Applied Ecology

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“…Climate change and related increased storm activity and rainfall may result in excessive run off of nutrients to the ocean and this could lead to eutrophication. Eutrophication can cause algal blooms and in the process favor some algal species over others, especially in coastal regions . Thus, the appearance of some algal species and also variations in dominance, diversity, and size of the algal populations could be utilized as bioindicators.…”

Section: Incidence Of Algae In Response To Climate Changementioning

confidence: 99%

Algal Communities: An Answer to Global Climate Change

Asadian

Fakheri

Mahdinezhad

et al. 2018

CLEAN Soil Air Water

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Human activities and resultant changes in global climate have profound consequences for ecosystems and economic and social systems, including those that are dependent upon marine systems. The increasing concentration of atmospheric greenhouse gases (GHGs) has resulted in gradual modification of multiple aspects of marine ecosystem properties such as salinity, temperature, and pH. It is well known that temporal and spatial variations in environmental properties determine the composition and abundance of different algal populations in a region. Within the present study the evidence for algal compatibility to changing environmental conditions is surveyed. The unique ability of algal communities to play a role in promotion of CO2 sequestration technologies, biorefinery approaches, as well as transition to CO2‐neutral renewable energy has gained traction with environmentalists and economists in a view to mitigation of climate change using algae. The next step is to re‐evaluate the assumption of a steady‐state oceanic carbon cycle and the role of biological activities in response to future climate changes.

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“…Furthermore, increasing seawater CO 2 concentration reduced the growth of Gracilaria tenuistipitata, Porphyra leucosticte, Fucus vesiculosus, Halimeda opuntia and Ulva linza (García-Sánchez et al, 1994;Mercado et al, 1999;Gutow et al, 2014;Johnson et al, 2014;Gao et al, 2018). In addition, the various effects of ocean acidification may be also modulated by other environmental factors, such as temperature, nutrients and photoperiods (Gao et al, 2017a;Li et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Peer Review #1 of "Future CO2-induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods (v0.1)"

Raven¹

2019

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Photoperiods have an important impact on macroalgae living in the intertidal zone. Ocean acidification also influences the physiology of macroalgae. However, little is known about the interaction between ocean acidification and photoperiod on macroalgae. In this study, a green alga Ulva linza was cultured under three different photoperiods (L: D = 8:16, 12:12, 16:8) and two different CO 2 levels (LC, 400 ppm; HC, 1000 ppm) to investigate their responses. The results showed that relative growth rate of U. linza increased with extended light periods under LC but decreased at HC when exposed to the longest light period of 16h compared to 12h. Higher CO 2 levels enhanced the relative growth rate at a L: D of 8:16, had no effect at 12:12 but reduced RGR at 16:8. At LC, the L: D of 16:8 significantly stimulated maximum quantum yield (Yield). Higher CO 2 levels enhanced Yield at L: D of 12:12 and 8:16, had negative effect at 16:8. Non-photochemical quenching (NPQ) increased with increasing light period. High CO 2 levels did not affect respiration rate during shorter light periods but enhanced it at a light period of 16h. Longer light periods had negative effects on Chl a and Chl b content, and high CO 2 level also inhibited the synthesis of these pigments. Our data demonstrate the interactive effects of CO 2

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Eutrophication and warming-driven green tides (Ulva rigida) are predicted to increase under future climate change scenarios

Cited by 135 publications

References 70 publications

Macroalgal blooms caused by marine nutrient changes resulting from human activities

Macroalgal blooms caused by marine nutrient changes resulting from human activities

Algal Communities: An Answer to Global Climate Change

Peer Review #1 of "Future CO2-induced seawater acidification mediates the physiological performance of a green alga Ulva linza in different photoperiods (v0.1)"

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