Intraspecific phenotypic variation in two estuarine rhodophytes across their intertidal zonation

Pedro, Raquel Sánchez de; Karsten, Ulf; Niell, F. Xavier; Carmona, Raquel

doi:10.1007/s00227-016-2997-5

Cited by 9 publications

(4 citation statements)

References 92 publications

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“…A progressive salinization has also been observed (Clavero et al, 1999;Rubio et al, 2003;Sánchez de Pedro et al, 2016), following the trend of other Mediterranean coastal wetlands, as mentioned above. This coastal ecosystem has been intensively studied, in relation to the impacts of environmental changes and human activities on nutrient cycles and ecophysiology of the different macrophytes inhabiting them (Pérez-Lloréns and Niell, 1990;Clavero et al, 1997Clavero et al, , 1999Clavero et al, , 2000Hernández et al, 1997;Palomo et al, 2004;Niell et al, 2005;Palomo and Niell, 2009;Ruiz-Nieto et al, 2014;Sánchez de Pedro et al, 2016). In this salt marsh, the dominant plant species belong to the genera Sarcocornia, Atriplex, and Arthrocnemum, occurring in distinct zones of the salt marsh, following an elevation gradient (Palomo and Niell, 2009).…”

Section: Introductionsupporting

confidence: 67%

Differential Nutrient Uptake by Saltmarsh Plants Is Modified by Increasing Salinity

2021

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In Southern European estuaries and associated salt marshes, the anthropogenic nutrient inputs, together with longer drought periods, are leading to increasing eutrophication and salinization of these coastal ecosystems. In this study, uptake kinetics of ammonium, nitrate, and phosphate by three common plants in Palmones salt marsh (Southern Spain), Sarcocornia perennis ssp. alpini, Atriplex portulacoides, and Arthrocnemum macrostachyum were measured in hydroponic cultures. We also determined how these uptakes could be modified by increasing salinity, adding NaCl to the incubation medium (from 170 to 1,025 mM). Kinetic parameters are analyzed to understand the competition of the three species for nutrient resources under realistic most frequent concentrations in the salt marsh. These results may also be useful to predict the possible changes in the community composition and distribution if trends in environmental changes persist. Atriplex portulacoides showed the highest Vmax for ammonium, the most abundant nutrient in the salt marsh, while the highest affinity for this nutrient was observed in A. macrostachyum. Maximum uptake rates for nitrate were much lower than for ammonium, without significant differences among species. The highest Vmax value for phosphate was observed in A. macrostachyum, whereas A. portulacoides presented the highest affinity for this nutrient. High salinity drastically affected the physiological response of these species, decreasing nutrient uptake. Sarcocornia perennis ssp. alpini and A. macrostachyum were not affected by salinity up to 510 mM NaCl, whereas A. portulacoides notably decreased its uptake capacity at 427 mM and even withered at 1,025 mM NaCl. At current most frequent concentrations of ammonium and phosphate in the salt marsh, S. perennis ssp. alpini is the most favored species, from the nutritional point of view. However, A. portulacoides could enhance its presence if the increasing ammonium load continues, although a simultaneous salinization would negatively affect its nutritional physiology.

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Section: Introductionsupporting

confidence: 67%

Differential Nutrient Uptake by Saltmarsh Plants Is Modified by Increasing Salinity

2021

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“…RTWE also had high protein levels, which can be explained by the high protein content of Gracilaria sp. (23.6 ± 0.2% dw, Table 1 ), presumably corresponding to water-soluble phycobiliproteins [ 37 ]. In turn, regardless of the high fiber content of Gracilaria sp., their solubilization in RTWE was significantly low if compared to the same extracts from the remaining algae.…”

Section: Resultsmentioning

confidence: 99%

Screening of Ulva rigida, Gracilaria sp., Fucus vesiculosus and Saccharina latissima as Functional Ingredients

Neto

Marçal

Queirós

et al. 2018

IJMS

105

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The intent of the present work was to evaluate the potential of four macroalgae prevalent in Europe, namely Ulva rigida, Gracilaria sp., Fucus vesiculosus and Saccharina latissima, for application in functional foods, either in the direct form or as extracts. Accordingly, nutritional composition, the content of phytochemical antioxidants, and the inhibitory ability of key enzymes with impacts on obesity and diabetes (α-glucosidase and pancreatic lipase) or on arterial pressure (angiotensin-I converting enzyme), were evaluated. Overall, protein, lipid, ash and fiber contents of the macroalgae ranged from 9–24% dw, 0.5–3.0% dw, 20–32% dw, and 37–45% dw, respectively, making them good candidates for nutritional supplementation of several foods, particularly due to their mineral and fiber contents. In addition, brown macroalgae, in particular F. vesiculosus, stood out for its superior phenolic content, which was reflected by its high antioxidant ability and inhibition towards α-glucosidase activity (0.032 mg/mL of hydroacetonic extract inhibited 50% of the enzyme activity).

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“…Osmotic acclimation in Bostrychia species has been well documented in the scientific literature. It occurs by increasing the intracellular concentrations of organic osmolytes, D -Sorbitol and D -Dulcitol polyols to maintain Turgor pressure (Karsten & Kirst 1989b;Karsten et al 1990;Karsten et al 1992;Karsten et al 1994a;Karsten et al 1996;Pedro et al 2016). This physiological property of Bostrychia species explains their success in estuarine environments.…”

Section: Discussionmentioning

confidence: 99%

“…However, effects of increasing temperature on Bostrychia species have still not been well investigated (e.g. Davis & Dawis 1981;Mann & Steinke 1988) and more current studies have investigated physiological responses of Bostrychia species under different light conditions (Cunha & Duarte 2002;Pedro et al 2014;Pedro et al 2016) and their mechanisms of inorganic carbon acquisition (Ruiz-Nieto et al 2014). Ryder et al (1999) analyzed the growth of Bostrychia moritiziana in various N and P conditions, showing that non-enriched treatments by nitrogen resulted in the lowest growth.…”

Section: Introductionmentioning

confidence: 99%

Effects of ocean warming, eutrophication and salinity variations on the growth of habitat-forming macroalgae in estuarine environments

2020

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Global change and coastal eutrophication are affecting macroalgae worldwide. We analyzed the effects of increased water temperature (25, 28 and 32 °C) and eutrophication on the growth of Bostrychia binderi and Bostrychia montagnei in a range of salinities (18, 24, 30, 36 and 42 PSU) through three independent multifactorial experiments. Both species had higher growth at 25 °C than at 28 and 32 °C (warming scenario projected by IPCC), suggesting a negative effect of ocean warming. The species showed a broad tolerance to the range of salinities tested, with higher growth at 36 and 42 PSU, as a local adaptation strategy. Oligotrophic seawater significantly affected the growth of both species because the lowest growth was found in this condition, whereas highest growth was found with increased availability of nutrients, which is probably because estuaries are nutrient-rich environments due to continental runoff. High temperatures, low salinities and few nutrients had negative interactive effects on the growth of both species. Our results show that ocean warming can be detrimental to the studied macroalgae, and that both species are tolerant to eutrophication, with B. montagnei being more sensitive than B. binderi. Our results also reinforce the euryhaline characteristic of the genus Bostrychia.

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Intraspecific phenotypic variation in two estuarine rhodophytes across their intertidal zonation

Cited by 9 publications

References 92 publications

Differential Nutrient Uptake by Saltmarsh Plants Is Modified by Increasing Salinity

Differential Nutrient Uptake by Saltmarsh Plants Is Modified by Increasing Salinity

Screening of Ulva rigida, Gracilaria sp., Fucus vesiculosus and Saccharina latissima as Functional Ingredients

Effects of ocean warming, eutrophication and salinity variations on the growth of habitat-forming macroalgae in estuarine environments

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