The Effect of Temperature on the Growth of Holopelagic Sargassum Species

Magaña-Gallegos, Edén; Villegas-Muñoz, Eva; Salas-Acosta, Evelyn Raquel; Barba-Santos, M. Guadalupe; Silva, Rodolfo; Tussenbroek, Brigitta I. van

doi:10.3390/phycology3010009

Cited by 15 publications

(11 citation statements)

References 24 publications

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“…In situ observations have also revealed that three different morphotypes are involved in the proliferation ( Sargassum fluitans III, Sargassum natans I, and Sargassum natans VIII e.g., Alleyne et al., 2023; Dibner et al., 2022; García‐Sánchez et al., 2020; Schell et al., 2015). The eco‐physiological features are species dependent, and it has been shown that Sargassum fluitans III, which has been the dominant morphotype over the recent years (García‐Sánchez et al., 2020), grows significantly faster than the Sargassum natans morphotypes (Changeux et al., 2023; Corbin & Oxenford, 2023; Magaña‐Gallegos et al., 2023a, 2023b). However there is no convergence of the recent studies on the temperature dependance of the different morphotypes (Corbin & Oxenford, 2023; Magaña‐Gallegos et al., 2023a, 2023b) and there is no knowledge of the salinity, light, or senescence dependence of the different morphotypes.…”

Section: Materials and Methods: The Forecasting Strategymentioning

confidence: 99%

“…The modeling of growth and mortality characteristics is poorly constrained by observations or experiments, so this aspect is particularly challenging. The main factors that were identified as essential to take into account to represent Sargassum growth are internal nutrient reserves of nitrogen and phosphorus (Hanisak, 1983), dissolved inorganic nutrients (nitrate, phosphate, ammonium) in the external medium (Changeux et al, 2023;Lapointe, 1986Lapointe, , 1995Lapointe et al, 2014Lapointe et al, , 2021Magaña-Gallegos et al, 2023a, 2023b, solar radiation (Hanisak & Samuel, 1987;Lapointe, 1995), sea surface temperature (Hanisak & Samuel, 1987;Magaña-Gallegos et al, 2023b), sea surface salinity (Hanisak & Samuel, 1987), and surface wind speed (Magaña-Gallegos et al (2023a) found that continuous movement of Sargassum is required to allow growth in ex-situ culture systems).…”

Section: Materials and Methods: The Forecasting Strategymentioning

confidence: 99%

“…The eco‐physiological features are species dependent, and it has been shown that Sargassum fluitans III, which has been the dominant morphotype over the recent years (García‐Sánchez et al., 2020), grows significantly faster than the Sargassum natans morphotypes (Changeux et al., 2023; Corbin & Oxenford, 2023; Magaña‐Gallegos et al., 2023a, 2023b). However there is no convergence of the recent studies on the temperature dependance of the different morphotypes (Corbin & Oxenford, 2023; Magaña‐Gallegos et al., 2023a, 2023b) and there is no knowledge of the salinity, light, or senescence dependence of the different morphotypes. Thus, we have chosen to model a generic species of pelagic Sargassum .…”

Section: Materials and Methods: The Forecasting Strategymentioning

confidence: 99%

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Skillful Seasonal Forecast of Sargassum Proliferation in the Tropical Atlantic

Jouanno,

Morvan,

Berline

et al. 2023

Geophysical Research Letters

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The large‐scale proliferation of pelagic Sargassum in the Tropical Atlantic from 2011 has been the subject of increasing attention because of its negative consequences on the environment, fishing, and socioeconomic activities when stranding on coastal areas. This recurrent phenomenon presents strong seasonal and year to year variations. Anticipating the abundances and stranding on seasonal scale poses important challenges in terms of observations and modeling. We show that skillful seasonal forecast of Sargassum distribution can be achieved with up to 7 months in advance over the Tropical Atlantic, by integrating both transport and current knowledge on physiology of Sargassum. This forecast is designed to help marine stakeholders to develop mitigation and resilience strategies through anticipatory decision‐making.

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Section: Materials and Methods: The Forecasting Strategymentioning

confidence: 99%

Section: Materials and Methods: The Forecasting Strategymentioning

confidence: 99%

Section: Materials and Methods: The Forecasting Strategymentioning

confidence: 99%

See 1 more Smart Citation

Skillful Seasonal Forecast of Sargassum Proliferation in the Tropical Atlantic

Jouanno,

Morvan,

Berline

et al. 2023

Geophysical Research Letters

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“…Changes in regional biogeochemistry, natural modes of climate variability and the intensity of Atlantic hurricane seasons may ultimately be related to anthropogenic climate change. Longer term, climate models predict substantial warming of the surface tropical Atlantic over 2005-50, in the range 1.0 °C-1.5 °C [27], in a region where sargassum is currently growing at close to optimum summer temperatures [28]. Associated ongoing changes in regional biogeochemistry, modes of variability and hurricane seasons are highly uncertain, with the effect of these on future sargassum abundance and distribution unclear.…”

Section: Introductionmentioning

confidence: 99%

Science and policy lessons learned from a decade of adaptation to the emergent risk of sargassum proliferation across the tropical Atlantic

Almela

Addo

Corbett

et al. 2023

Environ. Res. Commun.

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Climatic and anthropogenic changes appear to be driving the emergence of new ecosystem and human health risks. As new risks emerge, and the severity or frequency of known risks change, we ask: what evidence is there of past adaptations to emergent risks? What scientific and policy processes lead to adaptive solutions that minimise the impacts of these events, and draw out opportunities? We identify science and policy lessons learned from coping with, and responding to, the sudden arrival of brown macroalgae (pelagic sargassum) that has proliferated across the tropical Atlantic since 2011. Drawing on an evidence base developed from a systematic search of literature relating to sargassum seaweed, and using event timelines and word clouds, we provide an analysis of lessons learned from a case study of adaptive responses across three continents to an emergent risk over the course of a decade. We reflect on successes and failures as well as opportunities taken in building adaptive capacity to address the risk in four key domains: policy, knowledge and evidence, monitoring and early warning, and technology and valorisation. Failures include: lack of environmental risk registries; missed opportunities to share monitoring data; and lack of a shared approach to manage the risk. Successes include: development of national management strategies; open-access knowledge hubs, networks and webinars sharing information and best practice; semi-operational early advisory systems using open access remote sensing data; numerous innovations customising clean-up and harvesting equipment, and research and development of new uses and value-added products.

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“…( S. natans I and S. fluitans ) have found that light has a strong influence on their growth rates, similar to the effects of temperature (Hanisak & Samuel 1987; Magaña‐Gallegos et al . 2023). Light requirements of holopelagic Sargassum species are much higher than those of benthic species, obscuring differences between the former.…”

Section: Introductionmentioning

confidence: 99%

Growth and photosynthetic physiology of holopelagic Sargassum (Phaeophyceae) under laboratory conditions

Vásquez‐Elizondo,

Vázquez‐Delfín,

Robledo

2023

Phycological Research

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SummarySpecies of holopelagic Sargassum are responsible for Caribbean golden tides, commonly known as ‘Sargassum events’. These events mainly comprise Sargassum fluitans and Sargassum natans I, which are exposed to high levels of irradiance, but also self‐shading within their floating masses. In this study, we grew S. fluitans and S. natans I and acclimated them to low‐light conditions at 23°C in the laboratory to explore their responses to increasing light intensities. Photosynthesis, respiration, growth, and pigment content were evaluated over 3 weeks. S. fluitans and S. natans I photoacclimate to higher irradiances by decreasing their chlorophyll a and c contents. An increase in maximum photosynthesis and respiration rates was observed under high light, although differences occurred in the saturation irradiance and the initial slope of the photosynthesis versus irradiance curve. These adjustments were reflected in S. fluitans daily growth (from 2% to 7% d−1 at low to high light, respectively) and tissue nitrogen content (1.6–2.7%) but were absent in S. natans I (~1% d−1). The photosynthetic physiology of S. fluitans under these conditions suggests lower light requirements without compromising growth; however, under high light a higher photosynthetic performance was observed. Combining physiological and growth studies in holopelagic Sargassum species will serve as a baseline to understand and explain the success and overgrowth of these species along the Caribbean coast.

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The Effect of Temperature on the Growth of Holopelagic Sargassum Species

Cited by 15 publications

References 24 publications

Skillful Seasonal Forecast of Sargassum Proliferation in the Tropical Atlantic

Skillful Seasonal Forecast of Sargassum Proliferation in the Tropical Atlantic

Science and policy lessons learned from a decade of adaptation to the emergent risk of sargassum proliferation across the tropical Atlantic

Growth and photosynthetic physiology of holopelagic Sargassum (Phaeophyceae) under laboratory conditions

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