ABSTRACT
ABSTRACT We report for the first time great quantities of floating Sargassum to Serranilla Bank, in the Central Caribbean. The island is an important nesting site for sea turtles, and by the time the Sargassum wave arrived, the baby turtles were disclosing. Due to the thick mat of Sargassum along the beach, the baby turtles may have troubles to reach the ocean.
RESUMEN Se reporta por primera vez una gran cantidad de Sargassum flotante en Cayo Serranilla, en el Caribe central. La isla es un sitio importante para anidamiento de tortugas marinas, y al momento de la llegada del Sargassum, los nidos estaban eclosionando. Debido al espeso tapete de algas en la playa, las tortuguas pueden tener problemas en llegar al mar.
ABSTRACT
ABSTRACT Two species ofbrown algae (Phaeophyceae), Bachelotia antillarum and Dictyota humifusa are reported for the first time for the Archipelago of San Andrés, Providencia and Santa Catalina, part of the International Biosphere Reserve Seaflower.
RESUMEN Dos nuevos registros de algas pardas (Phaoephyceae), Bachelotia antillarum y Dictyota humifusa son registradas por primera vez para el Archipiélago de San Andrés, Providencia y Santa Catalina, Reserva Internacional de la Biosfera Seaflower.
ABSTRACT
We report the presence of persistent blooms of Chaetomorpha linum in San Andres island, Southwestern Caribbean, during the year 2013.
Reportamos la presencia de florecimientos persistentes del alga verde Chaetomorpha linum en la isla de San Andrés, Caribe suroccidental.
ABSTRACT
We report an unusual biomass of floating Sargassum, composed of the species S. fluitans and S. natans, that reached the northeastern coast of San Andres island in September 2014. The time and size of the event is unprecedented to the island.
Se reporta la llegada de una biomasa inusual de Sargassum flotante, compuesta por las especies S. fluitans y S. natans, a la costa nororiental de la isla de San Andrés. La época y el tamaño del evento nunca habían sido reportados anteriormente para la isla.
ABSTRACT
The presence of tetrahedrally divided tatrasporangia in Ceramium bisporum Ballantine is reported for the first time. The plant was found as epiphytic on calcareous Halimeda tuna in coral reef environment in Caribbean Colombia. The taxon represents a new record for the country.
Se reporta por primera vez la presencia de tetrasporangios divididos tetrahedricamente para la especie Ceramium bisporum. El alga fue encontrada epífita del alga calcárea Halimeda tuna en arrecifes coralinos en el Caribe colombiano. El taxón representa un nuevo registro para el país.
ABSTRACT
In the Colombian Caribbean, the marine macroalgal flora of the Seaflower International Biosphere Reserve has been little studied, despite its ecological importance. Historical records have reported only 201 macroalgae species within its area of almost 350 000km². However, recent surveys have shown a diversity of small algae previously overlooked. With the aim to determine the macroalgal diversity in the Reserve, we undertook field surveys in different ecosystems: coral reefs, seagrass beds, and rocky and sandy substrates, at different depths, from intertidal to 37m. During these field surveys, we collected a small described species belonging to the genus Crouania (Callithamniaceae, Rhodophyta), Crouania pumila sp. nov. that is decribed in this paper. This new species was distinguished from other species of the genus by a distinctive suite of traits including its diminutive size (to only 3.5mm in length), its decumbent, slightly calcified habit (epiphytic on other algae), its ramisympodial branching, the ecorticate main axes, and the elongate shape of the terminal cells of the cortical filaments. The observations were provided for both female (cystocarpic) and tetrasporangiate thalli; however, male thalli were not seen. Further studies have to be undertaken in this Reserve in order to carry out other macroalgal analysis and descriptions.
Crouania pumila sp. nov. (Ceramiaceae, Rhodophyta) es descrita para la isla de Providencia, en el Caribe colombiano. La nueva especie se destaca de las otras especies del género por características como su tamaño diminuto (hasta 3.5mm de largo), su hábito decumbente y poco calcificado (epífita sobre otras algas), su ramificación ramisimpodial, la ausencia de corticación y la forma alargada de las células terminales de los filamentos corticales. Se proveen observaciones sobre talos femeninos (cistocárpicos) y tetraspóricos. No se observaron talos masculinos.
Subject(s)
Ecosystem , Rhodophyta/anatomy & histology , Rhodophyta/classification , Caribbean Region , Colombia , Population DensityABSTRACT
Se registra la presencia del helecho invasor Pteridium caudatum (L.) Maxon en la isla de Providencia, Colombia. La especie ha sido encontrada como planta decorativa en jardines y patios, así como naturalizada en El Pico, la localidad boscosa con mejor estado de conservación de la isla. Se discuten las implicaciones ecológicas relativas a la presencia de esta especie.
We report for the first time the presence of the invasive fern Pteridium caudatum (L.) Maxon Old Providence Island, Colombia. The species was found as an ornamental plant in house backyards, as well as in the wild in the locality The Peak, the best preserved area of the island. We discuss the ecological implications associated to the presence of this species.
ABSTRACT
In order to determine the occurrence of epiphytic toxic dinoflagellates in the coastal waters of San Andrés Island, Caribbean Colombia, we analyzed the seagrass beds on the northern and eastern sides of the island. We found seven species of toxicogenic dinoflagellates, belonging to the genera Prorocentrum and Ostreopsis. The cell densities were generally low if compared with previous studies in other Caribbean sites, ranging from 0 to 836 cells/dry weight. The species encountered are known to produce toxins causing the Diarrehic Shellfish Poisoning and Ciguatera, poisonings which have been documented in the island.
Con el objetivo de determinar la presencia de dinoflagelados tóxicos epifitos en aguas costeras de la isla de San Andrés, Caribe colombiano, se analizaron las praderas de pastos marinos de los sectores norte y oriente de la isla. Se encontraron siete especies toxinogénicas de dinoflagelados pertenecientes a los géneros Prorocentrum y Ostreopsis. Las densidades celulares fueron bajas comparadas con estudios en otros sitios del Caribe, con rangos entre 0 y 836 cel./peso seco. Las especies encontradas son conocidas por producir toxinas que causan diarrea (PSP) y Ciguatera, intoxicaciones que ya han sido documentadas en la isla.