Possible change in distribution of seaweed, Sargassum horneri, in northeast Asia under A2 scenario of global warming and consequent effect on some fish

Komatsu, Toshimitsu; Fukuda, Masahiro; Mikami, Akiko; Mizuno, Shinji; Kantachumpoo, Attachai; Tanoue, Hideaki; Kawamiya, Michio

doi:10.1016/j.marpolbul.2014.04.032

Cited by 60 publications

(33 citation statements)

References 17 publications

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“…Likewise, following the transport pathways, a higher temperature in 2017 can also stimulate faster growth than in previous years, leading to the unprecedented 2017 EFA bloom. This argument is in line with the scenarios described in Komatsu, Fukuda, et al (), where S. horneri blooms were predicted to move northward under global warming. However, the temperature argument could not explain why a moderate‐sized bloom also occurred in 2015 as temperature in winter 2015 had a slight negative anomaly.…”

Section: Discussion: Causes Of the Efa Blooms And Their Interannual Vmentioning

confidence: 99%

Floating Algae Blooms in the East China Sea

Wang

et al. 2017

Geophysical Research Letters

115

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A floating algae bloom in the East China Sea was observed in Moderate Resolution Imaging Spectroradiometer (MODIS) imagery in May 2017. Using satellite imagery from MODIS, Visible Infrared Imaging Radiometer Suite, Geostationary Ocean Color Imager, and Ocean Land Imager, and combined with numerical particle tracing experiments and laboratory experiments, we examined the history of this bloom as well as similar blooms in previous years and attempted to trace the bloom source and identify the algae type. Results suggest that one bloom origin is offshore Zhejiang coast where algae slicks have appeared in satellite imagery almost every February–March since 2012. Following the Kuroshio Current and Taiwan Warm Current, these “initial” algae slicks are first transported to the northeast to reach South Korea (Jeju Island) and Japan coastal waters (up to 135°E) by early April 2017, and then transported to the northwest to enter the Yellow Sea by the end of April. The transport pathway covers an area known to be rich in Sargassum horneri, and spectral analysis suggests that most of the algae slicks may contain large amount of S. horneri. The bloom covers a water area of ~160,000 km2 with pure algae coverage of ~530 km2, which exceeds the size of most Ulva blooms that occur every May–July in the Yellow Sea. While blooms of smaller size also occurred in previous years and especially in 2015, the 2017 bloom is hypothesized to be a result of record‐high water temperature, increased light availability, and continuous expansion of Porphyra aquaculture along the East China Sea coast.

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Section: Discussion: Causes Of the Efa Blooms And Their Interannual Vmentioning

confidence: 99%

Floating Algae Blooms in the East China Sea

Wang

et al. 2017

Geophysical Research Letters

115

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“…Recent publications support the assertions of the AR5, observing different distribution shifts and responses to warming in warm and cold-water species Komatsu et al, 2014) However, there are some inconsistencies in the literature as Brodie et al (2014) predict, "seagrass will proliferate" in the North Atlantic under future warming. Recent publications add further evidence that, in temperate regions, kelp mortality, spore mortality and germination will be negatively affected by projected temperature increases under RCP8.5 Gaitán-Espitia et al, 2014).…”

Section: Updates To Ar5mentioning

confidence: 93%

An updated synthesis of the observed and projected impacts of climate change on the chemical, physical and biological processes in the oceans

et al. 2015

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The 5th Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC) states with very high certainty that anthropogenic emissions have caused measurable changes in the physical ocean environment. These changes are summarized with special focus on those that are predicted to have the strongest, most direct effects on ocean biological processes; namely, ocean warming and associated phenomena (including stratification and sea level rise) as well as deoxygenation and ocean acidification. The biological effects of these changes are then discussed for microbes (including phytoplankton), plants, animals, warm and cold-water corals, and ecosystems. The IPCC AR5 highlighted several areas related to both the physical and biological processes that required further research. As a rapidly developing field, there have been many pertinent studies published since the cut off dates for the AR5, which have increased our understanding of the processes at work. This study undertook an extensive review of recently published literature to update the findings of the AR5 and provide a synthesized review on the main issues facing future oceans. The level of detail provided in the AR5 and subsequent work provided a basis for constructing projections of the state of ocean ecosystems in 2100 under two the Representative Concentration Pathways RCP4.5 and 8.5. Finally the review highlights notable additions, clarifications and points of departure from AR5 provided by subsequent studies.

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“…These changes cause shifts in habitat structure, from abundant canopies to alternative states dominated by filamentous and encrusting species, leading to a drastic reduction of any macroalgal biomass ("barren grounds") ( Figure 5) (FilbeeDexter and Scheibling, 2014;Hereu et al 2005;Komatsu et al, 2014;Sala et al, 2011;Vergés et al, 2014a). The main category of grazers that are involved in these processes are sea urchins, with populations that can dramatically proliferate through the loss of their predators, such as sparid fishes in the Mediterranean Sea, due to overfishing (Sala et al,1998).…”

Section: Overgrazingmentioning

confidence: 99%