Seasonality in the canopy structure of the endangered brown macroalga <i>Cystoseira abies-marina</i> at Gran Canaria Island (Canary Islands, eastern Atlantic)

Valdazo, José; Viera-Rodríguez, María Ascensión; Tuya, Fernando

doi:10.1080/09670262.2019.1696989

Cited by 8 publications

(7 citation statements)

References 47 publications

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“…This may be related to different environmental adaptations to nutrient availability (G. rayssiae grows in an ultraoligotrophic region), temperature, light intensity, and wave action, all having a strong influence on their growth and primary productivity (Ballesteros, 1989). Indeed, our findings confirmed the importance of global radiation, phosphate, and temperature as drivers of G. rayssiae's growth, as obtained in other studies of congeneric species (Valdazo et al, 2020).…”

Section: Phenological and Ecological Featuressupporting

confidence: 90%

“…We decided to continue following the quadrats and counting the number of individuals in each quadrat to have monthly density data for the whole of 2019 (except October due to sea conditions). The population dynamics was described considering the specimens spotted within the quadrats and by measuring the maximum thallus length directly in the field with a ruler (from the holdfast to the top of the longest branchlet) (Medrano et al, 2020;Valdazo et al, 2020;Reynes et al, 2021). Population size structure was defined with the characterization of six different size classes as follows: 1 ≤ 5, 2 = 5.…”

Section: Phenological Changes In Density Length and Covermentioning

confidence: 99%

“…Population size structure was defined with the characterization of six different size classes as follows: 1 ≤ 5, 2 = 5. 1-10, 3 = 10.1-15, 4 = 15.1-20, 5 = 20.1-25, and 6 ≥ 25 cm (Åberg, 1990;Valdazo et al, 2020), separated by season and year.…”

Section: Phenological Changes In Density Length and Covermentioning

confidence: 99%

“…Since the beginning of the 20 th century, a large number of studies have been conducted on macrophyte communities that focused mostly on the Western Mediterranean basin (Serio et al, 2006;Mangialajo et al, 2008a;Ballesteros et al, 2009;Cormaci et al, 2012;Tasķin et al, 2012;Vergeś et al, 2014;Thibaut et al, 2015;Mineur et al, 2015;Ivesǎ et al, 2016;Mancuso et al, 2018;Valdazo et al, 2020;Medrano et al, 2020;Orlando-bonaca et al, 2021). In contrast, information on distribution, dynamics, and ecology of these forests in the Eastern basin and specifically in the Levantine Sea, is scarce.…”

Section: Introductionmentioning

confidence: 99%

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Thermal vulnerability of the Levantine endemic and endangered habitat-forming macroalga, Gongolaria rayssiae: implications for reef carbon

et al. 2022

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Ocean warming is a major threat to marine ecosystems, especially to species with a narrow thermal niche width and narrow biogeographic distribution, like some habitat-forming seaweeds. Declines of marine forests have been reported for several canopy-forming species in temperate regions, including the Mediterranean Sea, where they are dominated by species from the order Fucales, but most of the information on their ecology and status comes from the western basin. Here, we studied the thermal vulnerability and metabolic functioning of the endemic Gongolaria rayssiae located in fast-warming waters of the Israeli Mediterranean coast. We followed seasonal changes in phenology and ecology of G. rayssiae and its associated community during 2018-2020. Its highest biomass, density and thallus length were documented in spring-early summer (March-mid June). When seawater temperature exceeded 25°C, it shed its branches until February, when re-growth normally occurred. The thermal performance curve of G. rayssiae was determined by exposing it to 11 temperature levels in the range 15-35°C. The thermal optimum temperature for gross oxygen production, determined from the fitted curve, was 24.5°C. This relatively low thermal optimum suggests marked sensitivity to warming and supports the notion that G. rayssiae is a temperate relict species in the area. Additionally, we conducted seasonal ex-situ incubations during daytime and nighttime and recorded the highest primary productivity in spring, when it is at its peak of growth. In this season, its net inorganic carbon uptake was 42 ± 11 µmol C g dw-1 h-1 ( ± SD), while in its branchless form during late summer, it decreased six-fold. Due to the fast ocean warming conditions of the area, we hypothesize that the growth season of the species will shrink, and the species may eventually disappear. Finally, when exposed to high temperatures in natural and manipulative conditions, G. rayssiae exhibited a dramatic decline in its carbon sequestration rates with important implication for the carbon budget of the reef. This study highlights the importance of establishing a species phenology and environmental sensitivity (and especially that of endemic ones) in rapidly warming ecosystems, to estimate its potential fate due to climate change.

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Section: Phenological and Ecological Featuressupporting

confidence: 90%

Section: Phenological Changes In Density Length and Covermentioning

confidence: 99%

Section: Phenological Changes In Density Length and Covermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal vulnerability of the Levantine endemic and endangered habitat-forming macroalga, Gongolaria rayssiae: implications for reef carbon

et al. 2022

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“…This species of marine macro-algae is a canopy-forming brown seaweed distributed throughout the Mediterranean, the Macaronesian Region, and the coast of Africa [20]. In the Canary Islands, this alga has been reported from all over the archipelago, being particularly abundant in the intertidal zone [21]. Barreto et al, (2012) evaluated the antioxidant and antiproliferative activities of different organic extracts of Cystoseira abies-marina.…”

Section: Introductionmentioning

confidence: 99%

Gongolarones as antiamoeboid chemical scaffold

Rodríguez-Expósito

Nicolás-Hernández

Sifaoui

et al. 2023

Biomedicine & Pharmacotherapy

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Fabulous but Forgotten Fucoid Forests

Thomsen,

Stæhr,

South

2024

Ecology and Evolution

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Fucoid forests are areas dominated by marine brown seaweed in the taxonomic order Fucales that, like the better‐known marine foundation species—corals, kelps, seagrasses, salt marshes, and mangroves—are threatened by anthropogenic stressors. Fucoid forests are fabulous and important because they, like the better‐known marine foundation species (i) span large areas, bioregions, and ecosystems, (ii) provide ecological functions such as high productivity, biodiversity, and habitat for iconic and endemic species, and (iii) support a variety of ecosystem services, like commercial fisheries, regulation of nutrients and carbon, and cultural values. Fucoid forests are, based on a new citation analysis, forgotten worldwide, because they are described orders of magnitude less than the better‐known marine foundation species, in ecology and marine biology textbooks, in Google Scholar and Scopus databases over scientific literature, and in recent reports and reviews about seaweed forests. Fucoid forests would be less forgotten if more people acknowledge their biological importance and societal value more often and equate their importance to that of the better‐known marine foundation species. To decrease the knowledge gap between fucoids and the better‐known foundation species, researchers and science communicators could join forces under a broad “fucoid umbrella,” establish stronger online presences, coordinate and collaborate on publications, and produce free eye‐catching non‐technical materials for teachers, managers, politicians, grass‐root organizations, philanthropists, and funding agencies.

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Seasonality in the canopy structure of the endangered brown macroalga Cystoseira abies-marina at Gran Canaria Island (Canary Islands, eastern Atlantic)

Cited by 8 publications

References 47 publications

Thermal vulnerability of the Levantine endemic and endangered habitat-forming macroalga, Gongolaria rayssiae: implications for reef carbon

Thermal vulnerability of the Levantine endemic and endangered habitat-forming macroalga, Gongolaria rayssiae: implications for reef carbon

Gongolarones as antiamoeboid chemical scaffold

Fabulous but Forgotten Fucoid Forests

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