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  • 1
    Type of Medium: Book
    Series Statement: Informes tecnicos / Instituto Espanol de Oceanografia 2
    Language: Undetermined
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  • 2
    Publication Date: 2017-05-29
    Description: Harmful algal blooms (HABs) are natural phenomena that result from the interplay of biological, chemical, physical, and sedimentary processes occurring at different temporal and spatial scales. This paper provides an integrated description of HAB dynamics occurring at the mesoscale (10–100 km, sensu Haury et al., 1978) in confined and semi-confined coastal environments and under stratified water column conditions in a diversity of habitats where HAB events occur. It also focuses on relevant aspects occurring at fine-scale and even smaller cellular scales that are critical to species interactions with their environments. Examples include the key role of life-history stages in the recurrence of HABs in certain embayments; the physical-biological interactions driving the formation, maintenance, and decline of thin layers of plankton, including harmful microalgae; the fascinating, but poorly understood, domain of small-scale chemical interactions between HAB species and components of the food web; the potential link between human activities and climate change; and the trends in HAB occurrence. Development of new observing and sampling technologies and of new modeling approaches has resulted in greater understanding of these phenomena. Two Core Research Projects initiated under the GEOHAB Implementation Strategy, “HABs in Fjords and Coastal Embayments” and “HABs in Stratified Systems,” are discussed and priorities for future research toward improving the management and mitigation of HAB impacts are outlined.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Format: application/pdf
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  • 3
    Publication Date: 2021-05-19
    Description: Los estudios sobre dinoflagelados epibentónicos potencialmente tóxicos han incrementado en los últimos años debido al aumento en elnúmero de eventos perjudiciales atribuidos a algunas de estas microalgas. Tales eventos constituyen un riesgo para la salud humana ypara diversas actividades económicas. Con el objetivo de confirmar la presencia de estos dinoflagelados en el Parque Nacional Natural Tayrona (PNNT), Caribe colombiano, se recolectaron mensualmente muestras del pasto marino Thalassia testudinum entre enero de 2014 y diciembre de 2015 en dos sistemas costeros (bahía y laguna) ubicados en la Bahía de Chengue (11 ° 20’ N y 74 ° 07’ W). Las hojas del pasto marino se tomaron manualmente, se depositaron en bolsas plásticas y se trasladaron al laboratorio para el desprendimiento de los dinoflagelados epibentónicos, mediante agitación vigorosa. Para identificar las especies observadas, se utilizaron tres tipos de microscopía (óptica, invertida con epifluorescencia y microscopía electrónica de barrido). Se observaron 14 especies de dinoflagelados epifitos potencialmente tóxicos, distribuidos en cuatro géneros (Gambierdiscus, Coolia, Ostreopsis y Prorocentrum). Prorocentrum fue el género más representativo, siendo Ostreopsis cf. ovata, P. hoffmannianum y P. lima las especies más frecuentes en la bahía, mientras que en la laguna fueron Prorocentrum sp. 1 y P. rhathymum. Este estudio describe las características principales de las especies observadas, considerando que la identificación precisa a nivel de especie es requerida para cualquier estudio ecológico que busque proporcionar elementos para la gestión de riesgos contra los efectos tóxicos o perjudiciales causados por dinoflagelados epibentónicos
    Description: Studies on potentially toxic epibenthic dinoflagellates have been increased in the last years due to growing number of harmful events attributed to some of these microalgae. These events represent a risk to human health, as well as to diverse economic activities. With the aim of confirming the presence of these dinoflagellates in Tayrona National Natural Park, Colombian Caribbean, monthly samples of the seagrass Thalassia testudinum were collected between January 2014 and December 2015 in two coastal systems (Bay and Lagoon) located in Chengue Bay (11°20´ N y 74°07´W). Grass leaves were manually collected, placed in plastic bags with seawater and transferred to laboratory for detachment of epibenthic microalgae by vigorous shaking. To identify the species, three types of microscopy were used (optical, inverted with epifluorescence and scanning electron microscopy). Fourteen species of potentially toxic epiphytic dinoflagellates, distributed in four genera (Gambierdiscus, Coolia, Ostreopsis and Prorocentrum) were identified. Prorocentrum was the most representative genus. Ostreopsis cf. ovata, P. hoffmannianum and P. lima were the most frequent species in the Bay, whereas Prorocentrum sp. 1 and P. rhathymum were the most frequent in the Lagoon. This study depicts the main features of the observed species, considering that precise identification at species level is required for any ecological study that seeks to provide elements for risk management against the toxic or harmful effects caused by epibenthic dinoflagellates
    Description: Published
    Keywords: Dinoflagelados tóxicos ; FANs bentónicas ; Pastos marinos ; ASFA_2015::M::Marine plants
    Repository Name: AquaDocs
    Type: Journal Contribution , Not Known
    Format: pp. 9-40
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  • 4
    Publication Date: 2022-05-25
    Description: Author Posting. © Oceanography Society, 2010. This article is posted here by permission of Oceanography Society for personal use, not for redistribution. The definitive version was published in Oceanography 23, no. 3 (2010): 72-85.
    Description: Harmful algal blooms (HABs) have become an important subdiscipline within oceanography. Heightened attention to this topic as well as significant research advances reflect the global nature of the problem and the development of strong national and international programs for HAB research and management. The planning, communication, coordination, and capacity-building activities of the Intergovernmental Oceanographic Commission (IOC) have been a key factor in this growth. Here, we highlight selected advances in science and management capacity for HABs and document the impressive growth of the field in the context of activities supported directly or indirectly by IOC. As we look to the future, the field has significant momentum and stability. Nevertheless, it will require scientific guidance and coordination going forward. With an appropriate commitment of resources from member states, the IOC HAB program can continue to be a major factor in the sustained growth of this important scientific discipline and its delivery of improved observation and management systems.
    Description: Supported in part by the following grants to D.M. Anderson: NOAA Cooperative Agreement NA17RJ1223, NOAA Grant NA09NOS4260212, NIEHS Grant 1 P50 ES01274201, and NSF Grants OCE-0430724 and OCE-0911031.
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Format: application/pdf
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