Zooplankton as an early warning system of persistent organic pollutants contamination in a deep lake (lake Iseo, Northern Italy)

Bettinetti, Roberta; Garibaldi, Letizia; Leoni, Barbara; Quadroni, Silvia; Galassi, S.

doi:10.4081/jlimol.2012.e36

Cited by 7 publications

(4 citation statements)

References 7 publications

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“…Over the past 35 years, the thermal regime of Lake Iseo abruptly changed, with a less frequent complete winter mixing, which occurred only in 2005 and 2006 during harsh and windy winters (Leoni et al, ; Pareeth et al, ; Rogora et al, ). Studies demonstrated that winter large‐scale circulation atmospheric patterns control a chain of linked causal factors, affecting the winter air temperature, spring water temperature, and the resulting water vertical mixing depth and epilimnetic concentration of total phosphorus, structure and dynamics of planktonic communities, and pelagic food web (Bettinetti et al, ; Leoni, Marti, et al, ; Leoni, ; Leoni, Nava, et al, ; Nava et al, ).…”

Section: Methodsmentioning

confidence: 99%

Chloride Balance in Freshwater System of a Highly Anthropized Subalpine Area: Load and Source Quantification Through a Watershed Approach

Nava

Patelli

Bonomi

et al. 2020

Water Resources Research

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Recent studies have highlighted an increase of chloride in many lakes worldwide, with negative effects on chemical and physical properties of inland waters and freshwater biota. In this study, we assessed the long-term trend of chloride in Lake Iseo, located in the midlatitudes, and analyzed its relationship with discharge data of the inflows and hydrological and hydroclimatic changes. Additionally, we performed a specific annual survey, collecting water samples at a biweekly frequency in tributaries, calculating chloride load, and comparing the result with the chloride increase observed in lacustrine water. The combined use of Geographic Information System (GIS) and multivariate analyses allowed identification of possible sources of chloride and their seasonal dynamic within the mixed-land-use watershed: impervious surface and deicing salt, population and sewage effluents, livestock, and rainwater. Their potential contribution to total mass balance was assessed, cross-checking the results between chloride source evaluation and load estimation. Chloride load from wastewater treatment plants played an important role, albeit we highlighted that the main source was the road deicing salt, with a primarily winter contribution. The increased anthropization in the watershed was likely the main cause of the chloride enhancement. This study demonstrates that the problem of salinization can also affect lakes located in the midlatitude areas and provides a reproducible method for the identification and quantification of the different sources. Our results will help to better understand the potential sources of salinity in rivers that may reveal processes controlling the salinization of freshwater systems, with implications for future management practices.

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Section: Methodsmentioning

confidence: 99%

Chloride Balance in Freshwater System of a Highly Anthropized Subalpine Area: Load and Source Quantification Through a Watershed Approach

Nava

Patelli

Bonomi

et al. 2020

Water Resources Research

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“…Clearly, algal communities of large, deep, high-latitude lakes with extensive ice covers are no longer buffered from the ecological impacts of Arctic amplification, similar to the changes observed in many small- and medium-sized Arctic lakes since the mid-nineteenth century [ 11 , 12 , 22 , 27 ]. Primary producers such as diatoms often respond to environmental issues well in advance of organisms from higher trophic levels, from zooplankton that depend on algae for food, to fish species [ 84 ]. Therefore, shifts in sedimentary algae registered in palaeolimnological records provide important insights into trajectories of whole-lake ecosystem functioning [ 32 ].…”

Section: Discussionmentioning

confidence: 99%

Arctic warming drives striking twenty-first century ecosystem shifts in Great Slave Lake (Subarctic Canada), North America's deepest lake

Rühland,

Evans,

Smol

2023

Proc. R. Soc. B.

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Great Slave Lake (GSL), one of the world's largest and deepest lakes, has undergone an aquatic ecosystem transformation in response to twenty-first-century accelerated Arctic warming that is unparalleled in at least the past two centuries. Algal remains from four high-resolution palaeolimnological records retrieved from the West Basin provide baseline limnological data that we compared with historical phycological surveys undertaken on GSL between the 1940s and 1990s. We document the rapid restructuring of algal community composition ca 2000 CE that is consistent with recent increases in regional air temperature and declines in ice cover and wind speed, that collectively altered habitats for aquatic biota. This new limnological regime initiated the first observation of scaled chrysophytes and favoured the rapid proliferation of small planktonic cyclotelloid diatoms which replaced the long-established dominance of large filamentous Aulacoseira islandica in West Basin sedimentary records. Such abrupt transformations in the primary producers of this socioecologically valuable ‘northern Great Lake’ may have widespread implications for the entire food web with unknown consequences for aquatic ecosystem functioning and fisheries, which First Nations, Métis and other northern communities depend upon, pointing to the need for new studies.

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“…It is also necessary to add an element of cannibalism/self-limitation, if observed in reality [13]. Such models are solved analytically and are used to explore ecological issues such as coexistence in IGP systems [14,15], alternative stable states [16], and the possibility of unstable dynamics, as well as problems in applied ecology such as the biological control of pest species, the transfer of pollutants through the pelagic food web [17], and the conservation of threatened species [18]. …”

Section: Introductionmentioning

confidence: 99%

Intraguild Predation Dynamics in a Lake Ecosystem Based on a Coupled Hydrodynamic-Ecological Model: The Example of Lake Kinneret (Israel)

Makler-Pick

Hipsey

Zohary

et al. 2017

Biology

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The food web of Lake Kinneret contains intraguild predation (IGP). Predatory invertebrates and planktivorous fish both feed on herbivorous zooplankton, while the planktivorous fish also feed on the predatory invertebrates. In this study, a complex mechanistic hydrodynamic-ecological model, coupled to a bioenergetics-based fish population model (DYCD-FISH), was employed with the aim of revealing IGP dynamics. The results indicate that the predation pressure of predatory zooplankton on herbivorous zooplankton varies widely, depending on the season. At the time of its annual peak, it is 10–20 times higher than the fish predation pressure. When the number of fish was significantly higher, as occurs in the lake after atypical meteorological years, the effect was a shift from a bottom-up controlled ecosystem, to the top-down control of planktivorous fish and a significant reduction of predatory and herbivorous zooplankton biomass. Yet, seasonally, the decrease in predatory-zooplankton biomass was followed by a decrease in their predation pressure on herbivorous zooplankton, leading to an increase of herbivorous zooplankton biomass to an extent similar to the base level. The analysis demonstrates the emergence of non-equilibrium IGP dynamics due to intra-annual and inter-annual changes in the physico-chemical characteristics of the lake, and suggests that IGP dynamics should be considered in food web models in order to more accurately capture mass transfer and trophic interactions.

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Zooplankton as an early warning system of persistent organic pollutants contamination in a deep lake (lake Iseo, Northern Italy)

Abstract: The lake Iseo has been recently contaminated by DDT residues, originated

Cited by 7 publications

References 7 publications

Chloride Balance in Freshwater System of a Highly Anthropized Subalpine Area: Load and Source Quantification Through a Watershed Approach

Chloride Balance in Freshwater System of a Highly Anthropized Subalpine Area: Load and Source Quantification Through a Watershed Approach

Arctic warming drives striking twenty-first century ecosystem shifts in Great Slave Lake (Subarctic Canada), North America's deepest lake

Intraguild Predation Dynamics in a Lake Ecosystem Based on a Coupled Hydrodynamic-Ecological Model: The Example of Lake Kinneret (Israel)

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