Ecophysiological responses of a threatened red alga to increased irradiance in an in situ transplant experiment

Quintano, E.; Celis-Plá, Paula S. M.; Martínez, Brezo; Díez, I.; Muguerza, N.; Figueroa, Félix L.; Gorostiaga, J.M.

doi:10.1016/j.marenvres.2019.01.008

Cited by 18 publications

(17 citation statements)

References 83 publications

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“…MAAs were an important class of bioactive secondary metabolites in marine macroalgae [67,68], their types and accumulation were variable with some environmental variables, including radiation [6,74,77,81,116], nutrients [6,74,77,81], salinity [44], temperature [116], and desiccation [113,117]. These studies were not included in this paper.…”

Section: Phaeophytamentioning

confidence: 99%

“…For example, some members of orders Bangiales [5,40,65], Gracilariales [3,32,66], Gigartinales [5,40,42], and Gelidiales [48,67], their total MAAs contents ranges from 2 mg/g DW to nearly 20 mg/g DW. Of course, there were also many macroalgal Rhodophytes with lower total MAAs contents, such as Actinotrichia fragilis [5], Asparagopsis taxiformi [5], Galaxaura oblongata [5], Gelidium corneum [68], and Georgiella confluens [3], etc. [3][4][5]69], and these values were even less than 0.1 mg/g DW.…”

Section: Introductionmentioning

confidence: 99%

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Distribution, Contents, and Types of Mycosporine-Like Amino Acids (MAAs) in Marine Macroalgae and a Database for MAAs Based on These Characteristics

et al. 2020

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Mycosporine-like amino acids (MAAs), maximally absorbed in the wavelength region of 310–360 nm, are widely distributed in algae, phytoplankton and microorganisms, as a class of possible multi-functional compounds. In this work, based on the Web of Science, Springer, Google Scholar, and China national knowledge infrastructure (CNKI), we have summarized and analyzed the studies related to MAAs in marine macroalgae over the past 30 years (1990–2019), mainly focused on MAAs distribution, contents, and types. It was confirmed that 572 species marine macroalgae contained MAAs, namely in 45 species of Chlorophytes, 41 species of Phaeophytes, and 486 species of Rhodophytes, and they respectively belonged to 28 orders. On this basis, we established an open online database to quickly retrieve MAAs in 501 species of marine macroalgae. Furthermore, research concerning MAAs in marine macroalgae were analyzed using CiteSpace. It could easily be seen that the preparation and purification of MAAs in marine macroalgae have not been intensively studied during the past 10 years, and therefore it is necessary to strengthen the research in the preparation and purification of MAA purified standards from marine macroalgae in the future. We agreed that this process is not only interesting, but important due to the potential use of MAAs as food and cosmetics, as well as within the medicine industry.

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Section: Phaeophytamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distribution, Contents, and Types of Mycosporine-Like Amino Acids (MAAs) in Marine Macroalgae and a Database for MAAs Based on These Characteristics

et al. 2020

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“…In our experiments, the removal of epiphytes decreased the photosynthetic efficiency of shallow‐water H. incurva plants (Figure 7). As macroalgae often reduce their photosynthetic performance due to high light intensity and UV rays in shallow water (Altamirano et al., 2004; Quintano et al., 2019), our results suggest that H. incurva relies on shading by a large biomass of J. rubens to dampen the negative effects of light stress. At greater depths, however, the addition of epiphytes may limit the photosynthetic efficiency of H. incurva by further decreasing already diminished light intensity (Figure 7).…”

Section: Discussionmentioning

confidence: 61%

“…In the subtidal, light is one of the major abiotic factors determining the vertical distribution of marine primary producers (Duarte, 1991; Gómez et al., 1997). While the lower limit of distribution of seaweeds is limited by the requirement to maintain a positive ratio between photosynthesis and respiration (Gómez et al., 1997), the upper limit can depend upon their capacity to cope with light stress (Altamirano et al., 2004; Quintano et al., 2019; Wiencke et al., 2006). Shading from epiphytes can reduce the amount of light reaching the host photosynthetic tissues, having negative or positive effects depending on light regimes (Brandt & Koch, 2003; Ralph et al., 2006; Ravaglioli et al., 2017; Thornber et al., 2016).…”

Section: Discussionmentioning

confidence: 99%

Positive cascading effects of epiphytes enhance the persistence of a habitat‐forming macroalga and the biodiversity of the associated invertebrate community under increasing stress

et al. 2020

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Enhanced persistence of stress sensitive species in harsh environments due to amelioration of physical stress by habitat‐forming species has been widely documented. By contrast, less attention has been given to positive species interactions that may enhance stress tolerance in habitat‐forming species, with positive cascading effects on biodiversity and ecosystem functioning. We used a combination of field surveys and experiments to assess the effects of the epiphyte Jania rubens, on its subtidal macroalgal host Halopithys incurva, and their cascading effects on the associated invertebrate community, along a depth gradient associated with increasing stress (i.e. light stress at shallower depths). Correlative studies showed that the biomass and photosynthetic efficiency of H. incurva increased with depth, along with a decrease of epiphyte biomass. The experimental manipulation of epiphytes (removal in shallow water and addition in deep water) revealed that their effects on H. incurva physiology varied from positive in shallow habitats to negative in deep habitats. These results suggest that reduction of light/UV stress by J. rubens allows H. incurva to persist in shallow‐water habitats that would be otherwise unsuitable. In addition, colonization by large clumps of J. rubens increased the abundance and diversity of associated invertebrates in shallow habitat, suggesting that positive feedbacks between H. incurva, acting as the primary habitat‐former, and J. rubens, acting as a secondary habitat‐former, generate a facilitation cascade. Synthesis. Our study suggests that the persistence of some habitat‐forming species and their ability to support biodiversity may rely upon physical stress reduction by other species (e.g. epiphytes in our case) that are generally neglected when planning conservation strategies. A deeper understanding of context dependency in positive species interactions is essential for predicting patterns of species distribution under increasingly stressful climate scenarios.

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“…Multiple studies investigated the effect of different irradiances on the photosynthesis of macroalgae and the potential of recovery after light stress exposure (García-Sánchez et al 2012;Flores-Molina et al 2014;Giovagnetti et al 2018;Quintano et al 2019). As benthic macroalgae, members of the genus Caulerpa are generally sensitive to high light radiation (Horstmann 1983;Ukabi et al 2013;de Gaillande et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Cultured and packed sea grapes (Caulerpa lentillifera): effect of different irradiances on photosynthesis

2020

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The green macroalga Caulerpa lentillifera (sea grapes, green caviar) is a promising source for future nutrition due to its beneficial composition for human consumption. It is cultured in tidal ponds, mainly in Vietnam and the Philippines, and stored for shipment and retail in plastic containers, like polystyrene (PS) and polyethylene terephthalate (PET), exhibiting different properties. This study investigates the influence of irradiances on the physiology of sea grapes under culture and packaging ambience in PET using pulse-amplitude modulated (PAM) fluorometry. Fv/Fm values of C. lentillifera significantly decreased < 0.54 ± 0.06 standard deviation (SD) after 7 days of culture under 100 μmol photons m−2 s−1, but with the potential of recovery. In packaging ambience in the state of desiccation, sea grapes exposed to room irradiances (3 μmol photons m−2 s−1) for 12 days were still physiologically in a good condition (Fv/Fm = 0.70 ± 0.06). However, 12 days under irradiances of 70 μmol photons m−2 s−1 leads to decreased Fv/Fm (0.42 ± 0.11) and a moisture content of 88.2 ± 3.3% of initial. After re-immersion in sea water under room irradiances, Fv/Fm values recovered to a certain degree. In darkness, desiccation was followed by a decrease of Fv/Fm to 0.09 ± 0.19 and moisture content of 49.3 ± 20.2% of initial with no recovery after re-immersion under room irradiances. Results suggest shading of C. lentillifera in pond culture and PET containers as suitable packaging for sea grapes, but a dim light source should be provided during storage.

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Ecophysiological responses of a threatened red alga to increased irradiance in an in situ transplant experiment

Cited by 18 publications

References 83 publications

Distribution, Contents, and Types of Mycosporine-Like Amino Acids (MAAs) in Marine Macroalgae and a Database for MAAs Based on These Characteristics

Distribution, Contents, and Types of Mycosporine-Like Amino Acids (MAAs) in Marine Macroalgae and a Database for MAAs Based on These Characteristics

Positive cascading effects of epiphytes enhance the persistence of a habitat‐forming macroalga and the biodiversity of the associated invertebrate community under increasing stress

Cultured and packed sea grapes (Caulerpa lentillifera): effect of different irradiances on photosynthesis

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