Hydrological processes in the mouth area of the Nemunas (Neman) River

Михайлова, М. В.; Žaromskis, Rimas

doi:10.1134/s009780781302005x

Cited by 5 publications

(1 citation statement)

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“…Sources of particulate organic matter to the lagoon are dominated by internal production with phytoplankton accounting for 69% of total inputs (Galkus andJokšas 1997, Daunys et al 2006). Allochthonous contributions are small because the principal tributary (Nemunas River) is a regulated, lowland river which drains peaty-sandy soils and carries low suspended particulate matter (Mikhailova and Zaromskis 2013). In addition, the Curonian Lagoon has a low hydrological loading factor (ratio of contributing area to surface area = 63) which, combined with the low sediment delivery (Daunys et al 2006) translates to a loading rate of 278 g m -2 y -1 .…”

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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Section: P a G E | 13mentioning

confidence: 99%