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  • HAB  (7)
  • Harmful algal bloom (HAB)  (3)
  • Karenia brevis  (2)
  • 1
    Publication Date: 2022-05-25
    Description: Presented at CERF 2015: Grand Challenges in Coastal & Estuarine Science, Portland, Oregon, November 8 - 12, 2015 and at the Eighth Symposium on Harmful Algae in the U.S., Long Beach, California, November 15 – 19, 2015
    Description: A growing concern for coastal management is the choice of appropriate public or private responses to HABs as a natural hazard. Considerable efforts have been devoted to understanding the scientific aspects of HABs, including their distributions in space and time, their ecological roles, and the nature of their toxic effects, among others. Much energy also has been directed at exploring socio-economic impacts and identifying potential management actions, including actions to prevent, control, or mitigate blooms. Using blooms of Florida red tide (Karenia brevis) as a case study, we develop an approach to the choice of policy responses to K. brevis blooms. Importantly, several new types of public health, environmental, and socio-economic impacts now are beginning to be revealed, including human gastrointestinal and potential neurological illnesses; morbidities and mortalities of protected species, including manatees, cetaceans, and sea turtles; increased numbers of hospital emergency room visits for the elderly; increased respiratory morbidities in workers, such as beach lifeguards; and potential reduced K- 12 school attendance. Optimal policy responses to this hazard are likely to depend critically upon why and where a bloom occurs, its spatial and temporal scales and toxicity, and the nature of its impacts. In the face of significant ongoing scientific uncertainties, and given estimates of impacts, we find that policies to expand and stabilize scientific research programs and environmental monitoring efforts, to develop and implement education programs for both residents and tourists, and to communicate the physical aspects of blooms to the public in a timely fashion are likely optimal.
    Description: This research was sponsored by the National Science Foundation under NSF/CNH Grant No. 1009106.
    Keywords: Coupled human-nature systems ; CHANS ; HAB ; Harmful algae bloom
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 2
    Publication Date: 2022-05-25
    Description: Presented at the Eighth Symposium on Harmful Algae in the U.S., Long Beach, California, November 15 – 19, 2015
    Description: Coupled human-nature systems (CHANS) involve dynamic interactions between humans and nature, often influenced by and affecting the distinct dynamic characteristics of each component. We present an overview of an ongoing interdisciplinary research program focused on a specific type of systems that couple expanding and fluctuating human coastal populations to episodic blooms of toxic marine algae, drawing examples primarily from human interactions with blooms of the toxic dinoflagellate Karenia brevis from the eastern Gulf of Mexico (“Florida red tides”). We introduce a set of HAB Symposium “speed” presentations and associated posters based on multi-disciplinary research. Using extant, but extraordinary, data to specify empirical models, this program of research has focused on characterizing the influence of anthropogenic sources on K. brevis blooms, assessing the public health and economic impacts of these blooms in an exposure-response framework, and defining the choice of appropriate human policy responses to the hazard. We present examples of the generic aspects of CHANS systems in the context of Florida red tides, and we discuss also some of the challenges involved in compiling and analyzing the relevant data to support our positive and normative analytical efforts.
    Description: NSF/CNH NO.1009106
    Keywords: Coupled human-nature systems ; CHANS ; HAB ; Harmful algae bloom
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 3
    Publication Date: 2022-05-25
    Description: Presented at CERF 2015: Grand Challenges in Coastal & Estuarine Science, Portland, Oregon, November 8 - 12, 2015 and at the Eighth Symposium on Harmful Algae in the U.S., Long Beach, California, November 15 – 19, 2015.
    Description: The Coupled Natural and Human Systems program of US National Science Foundation is supporting our effort to elucidate linkages between harmful algal blooms and associated impacts on human health, society and economy of coastal communities. The human respiratory system is negatively impacted by inhaled toxic aerosols from the Florida red tide dinoflagellate, Karenia brevis. It has been hypothesized that surf height, wind speed, and wind direction were the predominant factors determining the amount of toxin reaching exposed individuals. Recent findings indicate that there are more environmental factors influencing the level of respiratory impacts from brevetoxins. We report on analyses that include additional factors such as air temperature, water temperature, dew point, barometric pressure, K. brevis cell counts, annd distance and direction from K. brevis cells to the individual. Factors contributing most to differences between no respiratory irritation and mild respiratory irritation were water temperature, air temperature, and dew point. Those factors contributing most to differences between mild respiratory irritation and moderate respiratory irritation were wind direction, surf conditions, and wind speed. Data on respiratory impacts was provided by the Beach Conditions Reporting System (BCRS). This system provides twice daily reports from lifeguards and park rangers at public beaches. These subjective reports include observed levels of respiratory irritation among beach-goers. Other environmental data were provided by a variety of local sources including private and public weather stations and many monitoring and research efforts. The resultant model provides a means to forecast respiratory impacts from observations of HAB distribution, and meteorological and oceanographic conditions.
    Description: ECOHAB FL – NA06NOS478024; NSF Coupled Human and Natural Systems - # 1009106; Research Experience for Undergraduates - # 0453955; FWCC – FL Red Tide Cooperative Agreements
    Keywords: Florida Red Tide ; Harmful algae bloom ; HAB
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 4
    Publication Date: 2022-05-25
    Description: Presented at the Eighth Symposium on Harmful Algae in the U.S. November 15 - 19, 2015, Long Beach, California
    Description: Karenia brevis is a marine dinoflagellate responsible for Florida red tide (FRT) blooms off the west coast of Florida. K. brevis contains brevetoxins, a neurotoxin that is absorbed by shellfish as well as released into the air. Brevetoxins are known to cause disruptions in normal neurological functions and are associated with neurotoxic shellfish poisoning (NSP). Previous research has emphasized the effect of FRT blooms on human health, from gastrointestinal to respiratory illnesses. However, there has been little research examining the effect of FRT blooms on neurological illnesses. There is research highlighting the biochemical effects of brevetoxins on mammalian nervous systems, so these symptoms can be matched to hospital codes that describe a hospital patient’s affliction. With these hospitalization codes, it is possible to study the relationship between FRT blooms and the occurrence of neurological illnesses in affected counties. The hospital data consists of inpatient data from 1988-2010 and emergency room data from 2005-2010. We will also use data containing K. brevis cells per liter as a measure of red tide occurrences.
    Description: This research was sponsored by the National Science Foundation under NSF/CNH grant no. 1009106
    Keywords: Florida Red Tide ; Harmful algae bloom ; HAB
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 5
    Publication Date: 2022-05-25
    Description: This paper is not subject to U.S. copyright. The definitive version was published in Environmental Health Perspectives 117 (2009): 1239–1243, doi:10.1289/ehp.0900645.
    Description: Algal blooms of Karenia brevis, a harmful marine algae, occur almost annually off the west coast of Florida. At high concentrations, K. brevis blooms can cause harm through the release of potent toxins, known as brevetoxins, to the atmosphere. Epidemiologic studies suggest that aerosolized brevetoxins are linked to respiratory illnesses in humans. We hypothesized a relationship between K. brevis blooms and respiratory illness visits to hospital emergency departments (EDs) while controlling for environmental factors, disease, and tourism. We sought to use this relationship to estimate the costs of illness associated with aerosolized brevetoxins. We developed a statistical exposure–response model to express hypotheses about the relationship between respiratory illnesses and bloom events. We estimated the model with data on ED visits, K. brevis cell densities, and measures of pollen, pollutants, respiratory disease, and intra-annual population changes. We found that lagged K. brevis cell counts, low air temperatures, influenza outbreaks, high pollen counts, and tourist visits helped explain the number of respiratory-specific ED diagnoses. The capitalized estimated marginal costs of illness for ED respiratory illnesses associated with K. brevis blooms in Sarasota County, Florida, alone ranged from $0.5 to $4 million, depending on bloom severity. Blooms of K. brevis lead to significant economic impacts. The costs of illness of ED visits are a conservative estimate of the total economic impacts. It will become increasingly necessary to understand the scale of the economic losses associated with K. brevis blooms to make rational choices about appropriate mitigation.
    Description: Sponsored by the Florida Fish & Wildlife Conservation Commission (07182) and the Departments of Environmental Protection and Health ; the U.S. Centers for Disease Control and Prevention ; the Center for Oceans and Human Health at the Woods Hole Oceanographic Institution [National Science Foundation (NSF) OCE-0430724 ; National Institute of Environmental Health Sciences (NIEHS) P50 ES012742] ; the Ocean and Human Health Center at the University of Miami Rosenstiel School (NSF 0CE0432368 ; NIEHS 1 P50 ES12736) ; and the NIEHS (PO1 ES 10594) .
    Keywords: Cost of illness ; Emergency department (ED) ; Harmful algal bloom (HAB) ; Economic impact ; Natural hazard
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 6
    Publication Date: 2022-05-25
    Description: Author Posting. © The Author(s), 2013. This is the author's version of the work. It is posted here for personal use, not for redistribution. The definitive version was published in Toxins and Biologically Active Compounds from Microalgae, Volume 2: Biological Effects and Risk Management, edited by Gian Paolo Rossini, :502-537. CRC Press, 2014. ISBN: 9781482231465.
    Description: Coupled nature-human (CNH) systems are now the focus of a growing number of interdisciplinary re-search programs worldwide (Liu et al. 2007a). As implied by the term “coupled,” these systems involve interactions between nature and humans, often affecting the dynamic characteristics of each component. Natural and social scientists supported by the US National Science Foundation and other research sponsors are engaged in developing a deeper understanding of these dynamics, focusing on the linkages and feedbacks affecting the trajectories of coupled system behavior. Human interactions with natural hazards, such as volcanoes, earthquakes, tsunamis, major storms, floods, droughts, forest fires, tornadoes, soil erosion, mudslides, sink holes, avalanches, lightning strikes, among many others, often involve such couplings. Indeed, economists who specialize in catastrophes have long defined natural hazards as comprising a process of joint production (Russell 1970, Zeckhauser 1996). Without a human presence, a natural hazard cannot impose impacts that can be measured or felt in socio-economic or other terms. In some instances, humans may contribute to the occurrence of a hazard or influence its frequency, scale, intensity, or duration. Even when humans do not cause or exacerbate a hazard, they may suffer its adverse effects, and there may be actions that can be taken to mitigate them. This chapter focuses on a specific type of hazard-human coupling relating to coastal blooms of toxic marine algae, often referred to as harmful algal blooms (HABs). Specifically, we draw examples primari-ly from human interactions with blooms of the toxic dinoflagellate Karenia brevis from the Gulf of Mexico. Humans interact with marine algae in many ways, and the great majority of such interactions are pos-itive and beneficial. Because primary productivity drives oceanic ecosystems from the bottom up, algae provide a critical, but mostly unquantified and often unappreciated, ecosystem service to humans. Even toxic dinoflagellates such as K. brevis may serve a beneficial ecological role in terms of primary productivity and nutrient cycling (Vargo et al. 1987).
    Description: This research was sponsored by the US National Science Foundation under NSF Grant No. 1009106 (CNH).
    Keywords: Coupled nature-human systems ; HAB ; Harmful algal bloom ; CHANS
    Repository Name: Woods Hole Open Access Server
    Type: Book chapter , Preprint
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  • 7
    Publication Date: 2022-05-25
    Description: Author Posting. © Elsevier B.V., 2008. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Harmful Algae 7 (2008): 772-781, doi:10.1016/j.hal.2008.03.002.
    Description: In this study, we develop a framework for measuring the value of harmful algal bloom (HAB) predictions. The framework captures the effects of both private and public responses to HABs. Using data from the New England nearshore commercial shellfish fishery and impact estimates for a large-scale HAB event in 2005, we illustrate how the potential value of HAB forecasts may be estimated. The results of our study suggest that the long-term value of a HAB prediction and tracking system for the Gulf of Maine is sensitive to the frequency of HAB events, the accuracy of predictions, the choice of HAB impact measures, and the effectiveness of public and private responses.
    Description: This paper is a result of research funded in part by the National Oceanic and Atmospheric Administration’s Coastal Ocean Program under award #NA04NOS4780270 to the Woods Hole Oceanographic Institution.
    Keywords: Harmful algal bloom (HAB) ; Red tide ; Fisheries ; Value of information ; Forecast ; Marine scientific research
    Repository Name: Woods Hole Open Access Server
    Type: Preprint
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  • 8
    Publication Date: 2022-05-25
    Description: Presented at the Seventh Symposium on Harmful Algae in the U.S., Sarasota, FL, 27-31 October 2013.
    Description: Coupled nature-human (CNH) systems are now the focus of a growing number of inter-disciplinary research programs worldwide. As implied by the term “coupled,” these systems in-volve interactions between humans and nature, often affecting the dynamic characteristics of each component. Both natural and social scientists are engaged in developing a deeper un-derstanding of these dynamics, focusing on the linkages and feedbacks affecting the trajectories of coupled system behavior. Several researchers have begun to identify the generic aspects of nature-human couplings. Many of these aspects have been adapted from the field of ecology, where the dynamic characteristics of ecological systems have been studied for decades. These aspects include system heterogeneity, time lags, reciprocal feedbacks, thresholds, surprises, legacies, and resilience. The presence of such aspects has implications for the stability and persistence of particular ecosystem states, leading potentially to further implications for human heath and welfare. This talk reviews a specific type of natural hazard-human coupling that relates to coastal blooms of toxic marine algae, drawing examples primarily from human interactions with blooms of the toxic dinoflagellate Karenia brevis from the eastern Gulf of Mexico. This talk introduces a set of HAB Symposium “speed” presentations relating to different aspects of an ongoing multi-institutional and inter-disciplinary research project that examines Florida red tides as a type of CNH system. We present examples of the generic aspects of CNH systems in the context of Florida red tides, and we discuss also some of the challenges involved in compiling relevant data to support our analytical efforts.
    Keywords: CHANS ; Coupled nature-human system ; Red tide ; HAB ; Harmful algae bloom
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 9
    Publication Date: 2022-05-25
    Description: Presented at the Eighth Symposium on Harmful Algae in the U.S. November 15 - 19, 2015, Long Beach, California
    Description: We analyzed a potential relationship between changes in school absences in Sarasota County and Karenia brevis (Kb) count data. Brevetoxins released during Kb blooms could be a reason for students experiencing increased respiratory or gastrointestinal illnesses, causing an increase in absence rates. We designed a map to relate the locations of Sarasota County schools and the distributions of those Kb counts with a minimum of 10,000 cell counts per liter and above. Due to the proximity of Kb counts, we hypothesized that brevetoxins could have a greater effect on the schools near the coast of Florida rather than the schools inland. Because individuals could be affected by brevetoxins up to several days after being exposed, we expected to find a lagged effect of a bloom occurrence on school absences. Using a regression approach, we were unable to detect an association between Kb counts and student absences. In some cases, the direction of the effects were opposite to what would be expected (i.e., an increase in Kb counts was associated with a reduction in the percent absent rate). The results indicated that over 70% of the variation in the school percent absent rate could be explained by the latent characteristics of individual schools (such as variations in student populations across different schools), by school week, by month (such as the effects of flu outbreaks or and other seasonal factors), and by year.
    Keywords: Florida Red Tide ; Harmful algae bloom ; HAB
    Repository Name: Woods Hole Open Access Server
    Type: Presentation
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  • 10
    Publication Date: 2022-10-26
    Description: © The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Hoagland, P., Kirkpatrick, B., Jin, D., Kirkpatrick, G., Fleming, L. E., Ullmann, S. G., Beet, A., Hitchcock, G., Harrison, K. K., Li, Z. C., Garrison, B., Diaz, R. E., & Lovko, V. Lessening the hazards of Florida red tides: a common sense approach. Frontiers in Marine Science, 7, (2020): 538, doi:10.3389/fmars.2020.00538.
    Description: In the Gulf of Mexico, especially along the southwest Florida coast, blooms of the dinoflagellate Karenia brevis are a coastal natural hazard. The organism produces a potent class of toxins, known as brevetoxins, which are released following cell lysis into ocean or estuarine waters or, upon aerosolization, into the atmosphere. When exposed to sufficient levels of brevetoxins, humans may suffer from respiratory, gastrointestinal, or neurological illnesses. The hazard has been exacerbated by the geometric growth of human populations, including both residents and tourists, along Florida’s southwest coast. Impacts to marine organisms or ecosystems also may occur, such as fish kills or deaths of protected mammals, turtles, or birds. Since the occurrence of a severe Karenia brevis bloom off the southwest Florida coast three-quarters of a century ago, there has been an ongoing debate about the best way for humans to mitigate the impacts of this hazard. Because of the importance of tourism to coastal Florida, there are incentives for businesses and governments alike to obfuscate descriptions of these blooms, leading to the social amplification of risk. We argue that policies to improve the public’s ability to understand the physical attributes of blooms, specifically risk communication policies, are to be preferred over physical, chemical, or biological controls. In particular, we argue that responses to this type of hazard must emphasize maintaining the continuity of programs of scientific research, environmental monitoring, public education, and notification. We propose a common-sense approach to risk communication, comprising a simplification of the public provision of existing sources of information to be made available on a mobile website.
    Description: The research leading to these results was supported by the US National Science Foundation (NSF) under NSF Grant No. CNH 1009106. PH and DJ acknowledge the complementary support under NSF Grant No. PFI/BIC 1534054.
    Keywords: Harmful algal bloom ; Florida red tide ; Karenia brevis ; Economic effect ; Policy response ; Social amplification of risk ; Risk communication
    Repository Name: Woods Hole Open Access Server
    Type: Article
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