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New Records of Marine Macroalgae on the Caribbean on Coast of Costa Rica

American Journal of Plant Sciences 2019年第10期10卷 1708-1728页

作者： Rubén Cabrera Jhoana Díaz-Larrea schery umanzor Gabinete de Arqueologia Oficina del Historiador de la Ciudad Habana Vieja Cuba Departamento de Hidrobiología Universidad Autónoma Metropolitana-Iztapalapa Ciudad de México México Department of Ecology & Evolutionary Biology University of Connecticut Stamford CT USA.

The results obtained in this study highlight that further the macroalgae diversity in this region is even higher than what is reported to date. Here we present eight new records of marine macroalgae collected from the Caribbean coast of Costa Rica between March 2011 and May 2019. The morphological characteristics of Bryocladia cuspidata, Ceratodictyon variabile, Gracilaria hayi, Padina boergesenii, Zonaria tournefortii, Sargassum furcatum, Chaetomorpha aerea, and Bryopsis pennata var. secunda are described. The genera Bryocladia and Zonaria are reported for the first time for this region.

关键词： New Records Caribbean Sea Costa Rica

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Using a Macroalgal Functional Form Approach to Assess the Level of Disturbance of Seagrass Meadows in Bahía of Nuevitas,Cuba(2000-2002)

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American Journal of Plant Sciences 2019年第11期10卷 2020-2033页

作者： Rubén Cabrera Jhoana Diaz-Larrea schery umanzor Laura Georgina Núnez Garcia Gabinete de Arqueologia Oficina del Historiador de la CiudadHabana ViejaCuba Departamento de Hidrobiologia Universidad Autonoma Metropolitana-IztapalapaMexico CityMexico Department of Ecology&Evolutionary Biology University of ConnecticutStamfordCTUSA

A study on the spatial and seasonal variations of the associate macroalgae and epiphytes of Thalassia testudinum was carried out in Bahía de Nuevitas. Sixty-two species were identified: 3 Cyanophyta, 25 Chlorophyta, 8 Phaeophyceae, 23 Rhodophyta and 3 Magnoliophyta, with two new records for Cuba and 43 for the area. The differences in the specific composition of the macroalgae communities are determined by a space component related to the type of affectation in each area. The morpho-functional groups of macroalgae in the station with more nutrient influence were mainly foliaceous and filamentous. In the stations far from the city, the predominant morpho-types were the leathery and articulate calcareous indicators of lower nitrification levels. The abundance and diversity of macroalgae in the site affected by fisheries were lower due to the damage by bottom trawls. Seasonal variations were found in the relative abundance of the species, not in the diversity, which makes evident seasonal changes in the structure of the seaweeds, where some species replace others in the community.

关键词： Cuba Epiphytes Thalassia Morpho-Functional Groups Seaweeds

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<i>Kappaphycus alvarezii</i>(Rhodophyta): New Record of an Exotic Species for the Caribbean Coast of Costa Rica

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American Journal of Plant Sciences 2019年第10期10卷 1888-1902页

作者： Rubén Cabrera schery umanzor Jhoana Díaz-Larrea Patricia G. Araújo Gabinete de Arqueologia Oficina del Historiador de la Ciudad Habana Vieja Cuba Department of Ecology & Evolutionary Biology University of Connecticut Stamford CT USA Departamento de Hidrobiología Universidad Autónoma Metropolitana-Iztapalapa Ciudad de México México Instituto de Biociências Universidad Sao Paulo Sao Paulo Brazil

Kappaphycus alvarezii, a red macroalgal species native to South-East Asia, has been introduced for commercial purposes to more than 20 tropical countries. In 2000, Panama became the first Central American country to develop its cultivation following a pilot-commercial approach. Twelve years after his introduction to Panama, the species was found to the south Caribbean coast. In the present study, we report the first record of K. alvarezii collected in Costa Rican waters. Genetic identification of the sample was performed with the mitochondrial marker cox2-cox3 intergenic spacer, and phylogenetic analyses showed that the sample collected grouped into a monophyletic clade with GenBank sequences from Vietnam, Indonesia, the Philippines, Brazil and Venezuela. Here we provide further description of its position with respect to other strains of K. alvarezii collected globally. Its possible route of entry to the Caribbean coast of Costa Rica is discussed. To date, it is possible to locate K. alvarezii in different areas away from the production fields which show its dispersion, and that the species is expanding;but more studies are needed to know the phase of colonization in which it is located because it is a combination of natural factors and human exploitation that determines the invasive potential of the species.

关键词： Carrageenophytes Cultivation Costa Rica Dispersion Exotic Introduction

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