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Dominant Macroalgae in Bahía de Cochinos, Matanzas, Cuba

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American Journal of Plant Sciences 2022年第6期13卷 797-814页

作者： Yusimí Alfonso Patricia González Sánchez Hansel Caballero Aragón Pedro Chevalier Jhoana Díaz-Larrea ruben cabrera Acuario Nacional de Cuba La Habana Cuba Unidad Iztapalapa Departamento de Hidrobiología Universidad Autónoma Metropolitana Cd de México México Gabinete de Arqueología Oficina del Historiador de la Ciudad Habana Vieja Cuba

Spatial-temporal variations of macroalgae were analyzed in a study conducted in Cueva de Los Peces (CP) and Punta Perdiz (PP), two dive sites located on the eastern coast of Bahía de Cochinos. The most conspicuous species found from 3 to 20 m depths were present in the biotopes of ridges and shallow and deep terraces. Sampling was carried out in September 2014, and March and October 2016 by autonomous diving and direct methods. Qualitative visual censuses and quantitative analyzes were used to estimate the coverage (%) of the genera according to the AGRRA methodology with the use of the 10 m linear transect and quadrats as the sampling unit. The first list of macroalgae for the area is offered that includes 49 taxa of which 10 were Rhodophyta, 10 Ochrophyta (Phaeophyceae), and 29 Chlorophyta. The dominant genera during the study period were Halimeda, Dictyota, Lobophora, and Udotea. Spatial differences were found regarding the specific composition. Temporal variations were evidenced in terms of the relative abundance of the genera present, which reveals temporal changes in the qualitative structure, where some species replace others. The information obtained is pioneering and can serve as a comparative baseline for future monitoring of the area.

关键词： Cuba Macroalgae Spatial-Temporal Variations Species List

Influence of the Macronutrients N, P and K on the Agarophyte <i>Alsidium triquetrum</i>(S. G. Gmelin) Trevisan, during Experimental Culture

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American Journal of Plant Sciences 2021年第4期12卷 573-585页

作者： ruben cabrera Arsenio J. Areces Jhoana Díaz-Larrea Laura Nuñez García J. Ricardo Cruz-Aviña Gabinete de Arqueología Oficina del Historiador de la Ciudad Habana Vieja Cuba Instituto de Geografia Tropical Ministerio de Ciencia Tecnología y Medio Ambiente Ciudad Habana Cuba Unidad Iztapalapa Departamento de Hidrobiología Universidad Autónoma Metropolitana Cd de México México Departamento de Recursos Naturales Academia de Investigación y Ciencia Universidad Tecnológica de Calakmul Calakmul México

The knowledge of the nutritional requirements and their relation to the physiology of marine algae growth is key to incorporate new species into aquaculture, whose dynamics tend to be largely unknown. The use of Alsidium triquetrum in the pharmacological industry depends on its availability in the natural environment, occasionally scarce. As macroalgae cultivation gains momentum worldwide, it is important to know how the effects of nutrients are modulated in the thallus during cultivation. The linking of the relative growth rates (RGR) of A. triquetrum and their relation with the macronutrients N (nitrogen), P (phosphorus) and K (potassium) at the tissue level under culture conditions constitutes the main contribution of this article. P levels tend to decrease as the plant completes its development. Both the concentration of N and P are higher in the stipe for the month of July, N (25.31 ± 0.26) vs P (0.846 ± 0.02) period when the highest vegetative development is reached. The N and P modulate the patterns of the species’ development over the annual cycle, unlike K, which is not considered a limiting factor. When the temperature and lighting are not favorable for growth, the plant simply accumulates these compounds. As environmental conditions change, these stored compounds are actively used in their growth. The specimens with an initial weight of 50 g present the best accumulated biomass (RGR) throughout the annual cycle.

关键词： Alsidium triquetrum Culture Phosphorus Macronutrients Nitrogen Potassium Growth Rate

Population Dynamics of Colonizing Fauna and Its Effect on Growth Rates of the Farmed Red Alga Alsidium triquetrum (S. G. Gmelin) Trevisan

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Natural Science 2022年第2期14卷 42-55页

作者： ruben cabrera Arsenio J. Areces Jhoana Díaz-Larrea Sunil Kumar Sahu Juan Ricardo Cruz-Aviña Laura G. Nuñez García Gabinete de Arqueología Oficina del Historiador de la Ciudad Habana Vieja Cuba Instituto de Geografía Tropical Ministerio de Ciencia Tecnología y Medio Ambiente Municipio Playa Ciudad Habana Cuba Departamento de Hidrobiología Universidad Autónoma Metropolitana Unidad Iztapalapa CBS Cd de México México State Key Laboratory of Biocontrol Guangdong Key Laboratory of Plant Resources School of Life Science Sun Yat-Sen University Guangzhou China Facultad de Medicina Veterinaria y Zootecnia BUAP Laboratorio de Medicina de la Conservación Licenciatura en Medicina Veterinaria y Fauna Silvestre Km. 7.5 Carretera Ca&ntilde ada Morelos El Salado Tecamachalco Puebla Mexico

Herbivores can drastically alter the morphology of macroalgae by directly consuming tissue and by inflicting structural wounds. Macroalgae host abundant and diverse epibiont communities, the dynamics of which tend to be mostly unknown in space and time. As the cultivation of macroalgae gains momentum worldwide, it is key to measure how epibionts could affect algal performance. We examined the epibiont community associated with farmed Alsidium triquetrum, a red macroalga with growing pharmacological interest. Measurements were conducted over two independent 60-day periods, one in summer and one in winter. Epibionts showed different patterns of succession in both seasons. Crustaceans, mainly amphipods, showed the highest overall density, with deleterious effects on daily growth rates of A. triquetrum in winter. Adverse effects as a function of epibionts were not detected in summer. A. triquetrum is a perennial alga. However, its performance as a crop in the nearshore can be significantly affected by the epibiont community structure that persists in winter. Amphipods and ascoglossan molluscs were risk factors in the mariculture of this agarophyte. In winter, they can destroy plants when they reach more than five individuals per gram of fresh biomass. Results highlight that commercial farming of A. triquetrum would be successful if grown throughout the summer.

关键词： Cultivation Epifauna Macroalgae Macroinvertebrates Seaweed Mariculture

Relationship of Trace Elements Concentration and Growth Rate in Alsidium triquetrum(Rhodophyta)

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Codon Usage of Chloroplast Gene rbcL in Laurencia sensu lato(Rhodophyta)species

American Journal of Plant Sciences（美国植物学期刊） 2023年第3期

作者： Arsenio J.Areces ruben cabrera Jhoana Díaz-Larrea Ligia Collado-Vides

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Journal of Marine Science 2021年第4期3卷 1-16页

作者： ruben cabrera Jhoana Díaz-Larrea Arsenio JAreces Laura Nuñez García JRicardo Cruz-Aviña Gabriela Vázquez Silva Gabinete de Arqueología Oficina del Historiador de la CiudadHabana ViejaCuba Universidad Autónoma Metropolitana Unidad IztapalapaCBSDepartamento de HidrobiologíaCd de MéxicoMéxico Instituto de Geografía Tropical Ministerio de CienciaTecnología y Medio AmbienteMunicipio PlayaCiudad HabanaCuba Universidad Tecnológica de Calakmul Departamento de Recursos Naturales Academia de investigación y CienciaCampecheMéxico Universidad Autónoma Metropolitana Unidad XochimilcoDepartamento el Hombre y su AmbienteLaboratorio de Limnobiología y AcuiculturaCd de MéxicoMéxico ARTICLE

Recent advances in molecular biology make it possible to sequence not only genes or genomes,but also to understand codon *** the organelle genes of these organisms,a small set of preferred codons are used for encoding *** the first time,this paper treats the divergence of synonymous codon usage and its bias in the rbcL gene within the Laurencia complex of red *** observed that the synonymous codon preference biases in rbcL are large and differ among species.A clear distinction in codon usage between genera is evident:the genera Dasya and Delesseria use a set that fluctuated between 53 and 58 ***,in the genera Ceramium,Chondrophycus,Chlamydomonas,Chlorella,Laurencia s.s,Osmundea,and Palisada codon usage indicates a higher restriction fluctuating between 40 to 51 *** complex genera and other representative algae showed a defined composition pattern,with lower percentage values of NNC/G(7-24.9%).Dasya and Delesseria showed a selective pattern tendency because of high percentage values of NNC/G(54-55%).The estimated codon bias parameters were tested to infer systematic relationships and match suitable codons with the NNC/G codon *** analysis based on Codon Usage supports phylogenetic relationships between Chondrophycus,Palisada,Laurencia,Osmundea,and Yuzurua species.

关键词： Codon Laurencia sensu lato Systematics Rhodophyta Marine algae