Diffusion of microcystins (cyanobacteria hepatotoxins) from the reservoir of Isahaya Bay, Japan, into the marine and surrounding ecosystems as a result of large-scale drainage

Takahashi, Tōru; Umehara, Akira; Tsutsumi, Hiroaki

doi:10.1016/j.marpolbul.2014.09.052

Cited by 27 publications

(16 citation statements)

References 15 publications

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“…Our lack of awareness of the potential importance of these aspects for ecosystem health has been underscored by recent mortality events among sea otters in the aforementioned Monterey Bay National Marine Sanctuary, whose cause was eventually attributed to the transfer of freshwater-derived microcystins into marine food webs at the river-sea interface in central California [30,34,35]. Subsequent studies in the northwest United States and Japan have identified contamination of marine resources from inland/freshwater sources of microcystins [31,36]. …”

Section: Discussionmentioning

confidence: 99%

Multiple Stressors at the Land-Sea Interface: Cyanotoxins at the Land-Sea Interface in the Southern California Bight

Tatters

Howard

Nagoda

et al. 2017

Toxins

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Blooms of toxic cyanobacteria in freshwater ecosystems have received considerable attention in recent years, but their occurrence and potential importance at the land-sea interface has not been widely recognized. Here we present the results of a survey of discrete samples conducted in more than fifty brackish water sites along the coastline of southern California. Our objectives were to characterize cyanobacterial community composition and determine if specific groups of cyanotoxins (anatoxins, cylindrospermopsins, microcystins, nodularins, and saxitoxins) were present. We report the identification of numerous potentially harmful taxa and the co-occurrence of multiple toxins, previously undocumented, at several locations. Our findings reveal a potential health concern based on the range of organisms present and the widespread prevalence of recognized toxic compounds. Our results raise concerns for recreation, harvesting of finfish and shellfish, and wildlife and desalination operations, highlighting the need for assessments and implementation of monitoring programs. Such programs appear to be particularly necessary in regions susceptible to urban influence.

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Section: Discussionmentioning

confidence: 99%

Multiple Stressors at the Land-Sea Interface: Cyanotoxins at the Land-Sea Interface in the Southern California Bight

Tatters

Howard

Nagoda

et al. 2017

Toxins

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“…Stratigraphic data from our silty site showed that sediments enriched with microcystin have been partially buried since the 2006 bloom event, with peak microcystin concentrations observed 1-2 cm below the sedimentwater interface. Other studies have also documented the presence of microcystin in sediments (Misson et al 2012, Takahashi et al 2014, though questions about persistence and bioavailability remain. Based on the relative contributions of silty (44%) and sandy (55%) areas in the Lithuanian portion of the Curonian Lagoon (Zilius et al 2014) we estimate a total mass of P a g e | 14 84 kg of microcystin in the 0-10 cm sediment layer.…”

Section: P a G E | 13mentioning

confidence: 99%

Microcystin in aquatic food webs of the Baltic and Chesapeake Bay regions

Bukaveckas

Lesutienė

Gasiūnaitė

et al. 2017

Estuarine, Coastal and Shelf Science

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We undertook a comparative study of the James River Estuary, a sub-estuary of Chesapeake Bay, and the Curonian Lagoon, a sub-estuary of the Baltic Sea, to better understand the factors that determine the presence and persistence of algal toxins in food webs. Over a 2-year period, we measured microcystin concentrations in water, sediment and biota (fish and shellfish) at both sites. Across both food webs we found highest levels of microcystin among consumers of suspended particulate matter, including planktivorous fishes and filter-feeding shellfish, and lower levels of toxin among piscivores, scavengers and benthic omnivores. Despite similar levels of microcystin in the water column at the two sites, we observed higher toxin levels in fish and sediments of the Curonian Lagoon. We attribute this difference to the legacy of prior toxic cyanobacteria blooms in the Curonian Lagoon and hydrologic factors that result in a predominance of autochthonously-derived organic matter in the sediments at this site. Our results suggest that a consideration of species-specific differences in feeding habits, and organic matter sources supporting food webs are important to understanding the accumulation and persistence of algal toxins in food webs and should therefore be considered in assessment of risks to aquatic biota and human health.

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“…Finally, filter-feeding estuarine and marine invertebrates are a potential source of human and animal exposure to freshwater cyanotoxins originating in coastal rivers [ 21 , 22 , 23 , 24 , 25 ]. For example, filter-feeding invertebrates from regions of microcystin-contaminated coastal freshwater outflow are the most likely source of microcystin intoxication for threatened southern sea otters ( Enhydra lutris nereis ) in Monterey Bay, California [ 21 ].…”

Section: Example Animal Sentinel Systems and Eventsmentioning

confidence: 99%

Sentinel Animals in a One Health Approach to Harmful Cyanobacterial and Algal Blooms

Backer

Miller

2016

Veterinary Sciences

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People, domestic animals, and wildlife are all exposed to numerous environmental threats, including harmful algal blooms (HABs). However, because animals exhibit wide variations in diet, land use and biology, they are often more frequently or heavily exposed to HAB toxins than are people occupying the same habitat, making them sentinels for human exposures. Historically, we have taken advantage of unique physiological characteristics of animals, such as the sensitivity of canaries to carbon monoxide, to more quickly recognize threats and help protect human health. As HAB events become more severe and widespread worldwide, exposure and health outcome data for animals can be extremely helpful to predict, prevent, and evaluate human exposures and health outcomes. Applying a One Health approach to investigation of HABs means that lessons learned from animal sentinels can be applied to protect people, animals and our shared environment.

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Diffusion of microcystins (cyanobacteria hepatotoxins) from the reservoir of Isahaya Bay, Japan, into the marine and surrounding ecosystems as a result of large-scale drainage

Cited by 27 publications

References 15 publications

Multiple Stressors at the Land-Sea Interface: Cyanotoxins at the Land-Sea Interface in the Southern California Bight

Multiple Stressors at the Land-Sea Interface: Cyanotoxins at the Land-Sea Interface in the Southern California Bight

Microcystin in aquatic food webs of the Baltic and Chesapeake Bay regions

Sentinel Animals in a One Health Approach to Harmful Cyanobacterial and Algal Blooms

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