Papers by Jose Lucas Perez-Llorens
Microalgae in phycogastronomy
Elsevier eBooks, 2023
Marine Ecology Progress Series, Dec 8, 2022
Marine Ecology Progress Series, Jun 9, 2016
Knowledge of plant mechanical traits is important in understanding how plants resist abiotic and ... more Knowledge of plant mechanical traits is important in understanding how plants resist abiotic and biotic forces and in explaining ecological strategies such as leaf lifespan. To date, these traits have not been systematically evaluated in seagrasses. We analysed mechanical (breaking force and tensile strength) and associated traits (thickness, width, length, fibre content, mass area, and lifespan) of leaves in 22 seagrass species (around one-third of all known seagrass species) to examine (1) the inter-specific variation of these traits in relation to growth form and bioregions, (2) the contribution of morphology to leaf breaking force, (3) how breaking force scales to leaf dimensions, and (4) how mechanical and structural traits correlate to leaf longevity. We also compared our seagrass dataset with terrestrial plant databases to examine similarities between them. Large variation in leaf breaking force was found among seagrass species but, on average, temperate species resisted higher forces than tropical species. Variation in leaf breaking force was largely explained by differences in leaf width rather than thickness, likely due to the benefits in leaf reconfiguration and light interception. Species of large dimensions (long leaves) typically had high leaf breaking force, plausibly to tolerate the drag forces they may experience, which are proportional to the leaf area. Leaves of long-lived species typically had high mass per leaf area and fibre content and they supported high breaking forces. Compared to terrestrial plants, seagrasses are short-lived species with moderately strong fibre-reinforced leaves, which probably evolved to withstand the hydrodynamic forces occurring in the sea, and in response to other environmental factors. Overall, our analysis provides new insights into the physical performance of seagrasses in the marine environment.
Resistance and recovery of benthic marine macrophyte communities to light reduction: Insights from carbon metabolism and dissolved organic carbon (DOC) fluxes, and implications for resilience
Marine Pollution Bulletin, Mar 1, 2023
Sedimentary Carbon and Nitrogen Stocks of Intertidal Seagrass Meadows in a Dynamic and Impacted Wetland: Effects of Coastal Infrastructure Constructions and Meadow Establishment Time
Social Science Research Network, 2022
Carbon metabolism and bioavailability of dissolved organic carbon (DOC) fluxes in seagrass communities are altered under the presence of the tropical invasive alga Halimeda incrassata
Science of The Total Environment, Sep 1, 2022
Mechanisms of inorganic carbon acquisition in Gracilaria gaditana nom. prov. (Rhodophyta)
Planta, Jun 15, 1999
... In fact, most of the marine macroalgae tested have been proposed to be ``HCO¿ 3 users&amp... more ... In fact, most of the marine macroalgae tested have been proposed to be ``HCO¿ 3 users'' (Beer and Eshel 1983; Sand-Jensen and Gordon 1984; Bidwell and McLachlan 1985; Giordano and Maberly 1989; Maberly 1990; Johnston 1991). ... nom. prov. (Rhodophyta) ...
Journal of Applied Phycology, Apr 17, 2023
Humankind has known the benefits of seaweeds since time immemorial. A number of these application... more Humankind has known the benefits of seaweeds since time immemorial. A number of these applications were likely passed down in the oral histories particularly of coastal dwellers and those using different seaweeds as food and treatments for common ailments. The beneficial use of many types of seaweeds was reported and recorded into some of the first written medical texts. The common benefits of these seaweed concoctions and applications seems to be linked to the presence of hydrocolloids and the various bioactive compounds. We believe this collation brings together, for the first time to our knowledge, a number of excerpts from major medical publications and esteemed writers of the day. It provides a rich background supporting the positive applications of various seaweeds to a multitude of human ailments, from skin to bowel, inside and out and many of the places in between! Keywords Seaweeds • Folk medicine • Diseases • Oral history "Those innocent plants ask for nothing more than to nourish or to heal animality. Many of them, the Laminaires, for instance, contain a luscious sugar; and others, as, for instance, the Corsican or Irish Moss, have a health-restoring bitter; and all, without exception, contain a concentrated and most nourishing mucilage, not a few of them saviors to the weak, worn, perishing lungs of presumptuous and ungrateful man. Where we now exhibit iodine, the English formerly used nothing but a confection of that same Corsican, or Irish, Moss." J. Michelet (1798-1874). Le mer [The Sea] (1861). "Juana gathered some brown seaweed and made a flat damp poultice of it, and this she applied to the baby's swollen shoulder [he was stung by a scorpion], which was as good a remedy as any and probably better than the doctor could have done. But the remedy lacked his authority because it was simple and didn't cost anything." John Steinbeck (1902-1968). The Pearl (1947).
Marine Biology, Mar 10, 2013
Verhandlungen, Oct 1, 1994
Journal of Marine Science and Engineering, Jul 28, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Limnology and Oceanography
Dissolved organic carbon (DOC) plays an essential role in the global marine carbon cycle, with co... more Dissolved organic carbon (DOC) plays an essential role in the global marine carbon cycle, with coastal vegetated communities as important DOC producers. However, the ultimate fate of this DOC remains still largely unknown due to the lack of knowledge about its chemical composition and lability. Furthermore, global change could alter both DOC fluxes and its bioavailability, affecting the carbon sequestration capacity of coastal vegetated communities. This study explores, in two contrasting seasons (winter and summer), the effects of an in situ simulated marine heatwave on carbon metabolism and DOC fluxes produced by seagrass (Cymodocea nodosa) and macroalgae (Caulerpa prolifera) communities. In addition, the fluorescent characteristics and biodegradability of the dissolved organic matter released directly by the communities under such conditions are evaluated. Under marine heatwave conditions, a significant increase in net community production (NCP) in C. nodosa and a shift to negati...
Seagrass - hydrodynamics interactions at Natural Park Cadiz Bay: Ecological implications
Trabajo presentado en el III Simposio Internacional en Ciencias del Mar (ISMS12), celebrado en Cá... more Trabajo presentado en el III Simposio Internacional en Ciencias del Mar (ISMS12), celebrado en Cádiz del 24 al 26 de enero de 2012.Las praderas de angiospermas marinas del Parque Natural Bahía de Cádiz (PNBC) son un elemento clave para los procesos ecológicos que se desarrollan en este espacio protegido. Su interacción con el ambiente hidrodinámico repercute en procesos como la incorporación de nutrientes, la sedimentación de partículas, la microtopografía o el propio crecimiento y supervivencia de las praderas. El rango de velocidades registradas en el saco interno de la bahía es bajo (0.01-0.08 m), sugiriendo que la dinámica mareal supone más una limitación física a la incorporación de nutrientes que un factor de estrés mecánico. Bajo esta premisa, el presente trabajo explora las principales interacciones entre las praderas de vegetación marina del PNBC y la hidrodinámica local, describiendo los efectos en tasas de renovación de las masas de agua, en dispersión de contaminantes o ...
Sedimentary organic carbon and nitrogen stocks of intertidal seagrass meadows in a dynamic and impacted wetland: Effects of coastal infrastructure constructions and meadow establishment time
Journal of Environmental Management
Journal of Marine Science and Engineering
Gracilarioids and Gigartinales are of great economic importance due to the phycocolloids they con... more Gracilarioids and Gigartinales are of great economic importance due to the phycocolloids they contain in their cell wall and are used in different industries worldwide. Field and laboratory cultures of two species of red seaweeds (Gracilaria gracilis and Chondracanthus teedei), confirmed after DNA analysis, were carried out to foster the increasing use of this species in Spain as a food source. Vegetative cultures carried out in an open-lock gate within a traditional salina in the ay of Cadiz (Southern Spain) rendered maximum growth rates in April (3.64% day−1) for G. gracilis and in November (4.68% day−1) for C. teedei, the latter showing significant differences between the months of the year. For laboratory cultures, samples of the two species used for sporulation were obtained from tidal creeks in several nearby locations of the Bay. In order to grow fertile carposporophytes from spores, Provasoli enriched seawater medium (ES medium), Miquel A + B and f/2 were used as culture med...
Praderas de angiospermas marinas de Andalucía
Atlas de las praderas marinas de España, 2015, págs. 314-399, 2015
Limnetica, 1993
We study the et'fects of salinity on the uptake of phospate by roots and rhizomes in the aquatic ... more We study the et'fects of salinity on the uptake of phospate by roots and rhizomes in the aquatic angiosperm Zostera noltii Hornem., and its possible release through the leaves to the surrounding water. The uptake of phosphate by roots and rhizomes was not affected by different salinity values (36% and 18%0) in the water surrounding the leaves; on the contrary, the foliar release was affeeted. The 6.25% of the phosphate uptaken belowground ogans was released by leaves in the control experiment (36%") cluring a 3 hour incubations, against the 57.87% in the low salinity experiment. Therefore the foliar release of phosphate is low at normal salinities found in the Palmones estuary (34-36%0), but when salinity values decrease (very rarely in this environment), the foliar release become enhanced 10 times, indicating that under these conditions, individual plants could act as a 'phosphate pump'. Nevertheless the atnount of phosphate releascd to the estuary is low due to the low eoverage of this plants.
Oceans, 2020
The hydrolytic activity of different types of polyphosphates, and the induction of soluble pyroph... more The hydrolytic activity of different types of polyphosphates, and the induction of soluble pyrophosphatase (sPPase; EC 3.6.1.1) activity have been assessed in cell extracts of nutrient limited green seaweed Ulva pseudorotundata Cormaci, Furnari & Alongi subjected to different phosphorus regimes. Following a long period of nutrient limitation, the addition of different types of (poly)phosphates to artificial seawater enhanced growth rates on fresh weight and area, but not on dry weight bases. Chlorophyll and internal P content were affected by P supply. In contrast, internal soluble reactive P was kept low and was little affected by P additions. Soluble protein content increased in all treatments, as ammonium was added to prevent N limitation. The C:N:P atomic ratio revealed great changes depending on the nutrient regime along the experiment. Cell extracts of U. pseudorotundata were capable of hydrolyzing polyphosphates of different chain lengths (pyro, tripoly, trimeta, and polyphos...
¿Las algas se comen?: un periplo por la biología, la historia, las curiosidades y la gastronomía
Sobre la obra: La vegetacion marina se caracteriza no solo por la gran diversidad de tamanos, for... more Sobre la obra: La vegetacion marina se caracteriza no solo por la gran diversidad de tamanos, formas y colores, sino por sus aplicaciones, a veces poco conocidas, y que suelen remontarse en ocasiones a los albores de la civilizacion. Entre estas destaca el uso medicinal y culinario que se les ha dado en Oriente, hasta el punto de haber sido consideradas objetos de veneracion en esta cultura milenaria. Por el contrario, en el mundo occidental han sido historicamente denostadas, al asociarse su consumo a epocas de penuria, hambruna y frugalidad. Afortunadamente, y desde hace unos anos, esta vision esta cambiando, y muchos restaurantes, al igual que en muchos hogares, las estan incluyendo en sus menus aprovechando sus importantes propiedades organolepticas y nutricionales. El uso culinario de las algas (tambien llamadas "verduras marinas") es el nucleo alrededor del cual pivotan y se entrelazan los diferentes capitulos del libro. Estos abarcan cuestiones basicas de biologia y...
Diversity, 2021
Seagrasses, as key ecosystem engineers in coastal ecosystems, contribute to enhancing diversity i... more Seagrasses, as key ecosystem engineers in coastal ecosystems, contribute to enhancing diversity in comparison with nearby bare areas. It has been proved mainly for epifauna, but data on infauna are still scarce. The present study addresses how seagrass structural complexity (i.e., canopy properties) affects the diversity of infaunal organisms inhabiting those meadows. Canopy attributes were achieved using seagrass mimics, which were used to construct in situ vegetation patches with two contrasting canopy properties (i.e., shoot density and morphology) resembling the two seagrass species thriving in the inner Cadiz Bay: Zostera noltei and Cymodocea nodosa. After three months, bare nearby areas, two mimicked seagrass patches (‘Zostera’ and ‘Cymodocea’), and the surrounding natural populations of Zostera noltei were sampled in a spatially explicit way. Shifts in organism diets were also determined using 15N and 13C analyses in available food sources and main infaunal organisms, mixing ...
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Papers by Jose Lucas Perez-Llorens