A freshwater mesocosm study into the effects of the neonicotinoid insecticide thiamethoxam at multiple trophic levels

Finnegan, Meaghean C.; Emburey, Simon N; Hommen, Udo; Baxter, Leilan; Hoekstra, Paul F.; Hanson, Mark L.; Thompson, Helen; Hamer, Mick

doi:10.1016/j.envpol.2018.07.096

Cited by 14 publications

(3 citation statements)

References 39 publications

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“…Besides insights into primary succession and initial pond ecosystem developments, our study contributes to the knowledge of experimental mesocosm studies used to disentangle stressor effects from other confounding factors (e.g., Finnegan et al, 2018 ; Hua & Relyea, 2014 ), as aquatic communities of these systems also generally are in very early stages of succession. Insights into primary succession of pond mesocosms, factors driving aquatic community development, and lotic ecosystem development trajectories as gained here may benefit the interpretation of findings from other studies focusing on artificially stressed mesocosm experiments.…”

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

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Structural and functional development of twelve newly established floodplain pond mesocosms

Stehle¹,

Manfrin

Feckler³

et al. 2022

Ecology and Evolution

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Ecosystems are complex structures with interacting abiotic and biotic processes evolving with ongoing succession. However, limited knowledge exists on the very initial phase of ecosystem development and colonization. Here, we report results of a comprehensive ecosystem development monitoring for twelve floodplain pond mesocosms (FPM; 23.5 m × 7.5 m × 1.5 m each) located in south‐western Germany. In total, 20 abiotic and biotic parameters, including structural and functional variables, were monitored for 21 months after establishment of the FPMs. The results showed evolving ecosystem development and primary succession in all FPMs, with fluctuating abiotic conditions over time. Principal component analyses and redundancy analyses revealed season and succession time (i.e., time since ecosystem establishment) to be significant drivers of changes in environmental conditions. Initial colonization of both aquatic (i.e., water bodies) and terrestrial (i.e., riparian land areas) parts of the pond ecosystems occurred within the first month, with subsequent season‐specific increases in richness and abundance for aquatic and terrestrial taxa over the entire study period. Abiotic environmental conditions and aquatic and terrestrial communities showed increasing interpond variations over time, that is, increasing heterogeneity among the FPMs due to natural environmental divergence. However, both functional variables assessed (i.e., aquatic and terrestrial litter decomposition) showed opposite patterns as litter decomposition rates slightly decreased over time and interpond differences converged with successional ecosystem developments. Overall, our results provide rare insights into the abiotic and biotic conditions and processes during the initial stages of freshwater ecosystem formation, as well as into structural and functional developments of the aquatic and terrestrial environment of newly established pond ecosystems.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Structural and functional development of twelve newly established floodplain pond mesocosms

Stehle¹,

Manfrin

Feckler³

et al. 2022

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

“…Portanto, testes de pós-exposição com maior duração poderiam ser mais sensíveis para N. iheringi devido à toxicidade retardada, por isso deveriam ser testados. Os resultados do Capítulo 2 reforçam o conceito da integração de análises das variáveis físicas e químicas em conjunto com as análises das variáveis biológicas em estudos de impactos dos contaminantes/agrotóxicos em ambientes aquáticos (FINNEGAN et al, 2018;, pois enquanto nas análises físicas, químicas, clorofila e nutrientes, estes não apresentaram modificações devido a introdução dos agrotóxicos nos mesocosmos (com exceção dos metais), as variáveis biológicas demonstraram efeitos direto da toxicidade do fipronil e da mistura de 2,4-D e fipronil. Ressalta-se que a análise de metais nem sempre é realizada em estudos ecotoxicológicos em mesocosmos com agrotóxicos.…”

Section: Testes De Pós-exposiçãounclassified

Avaliação dos efeitos de agrotóxicos em ecossistemas aquáticos tropicais utilizando organismos zooplanctônicos como bioindicadores

Lopes¹

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Pesticides in the Great Barrier Reef catchment area: Plausible risks to fish populations

Hook,

Smith,

Waltham

et al. 2024

Integr Envir Assess & Manag

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Waterways that drain the Great Barrier Reef Catchment Area (GBRCA) transport pollutants to marine habitats, provide a critical corridor between freshwater and marine habitats for migratory fish species, and are of high socioecological value. Some of these waterways contain concentrations of pesticide active ingredients (PAIs) that exceed Australian ecotoxicity threshold values for ecosystem protection. In this paper, we use a “pathway to harm” model with five key criteria to assess whether the available information supports the hypothesis that PAIs are or could cause harmful effects to fish and arthropod populations. Strong evidence for the first three criteria and circumstantial weaker evidence for the fourth and fifth criteria are presented. Specifically, we demonstrate that exceedances of Australian and New Zealand ecotoxicity threshold values (ETVs) for ecosystem protection are widespread in the GBRCA, that the PAI contaminated water occurs (spatially and temporally) at important habitat for fisheries and that there are clear direct and indirect mechanisms by which PAIs could cause harmful effects. The evidence for individuals and populations of fish and arthropods being adversely affected species is more circumstantial but consistent with PAIs causing harmful effects in the freshwater ecosystems of GBR waterways. We advocate strengthening the links between PAI concentrations and fish health because of the cultural values placed on the freshwater ecosystems by relevant stakeholders and Traditional Owners, with the aim that stronger links between elevated PAI concentrations and changes in recreationally and culturally important fish species will inspire improvements in water quality.

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A freshwater mesocosm study into the effects of the neonicotinoid insecticide thiamethoxam at multiple trophic levels

Cited by 14 publications

References 39 publications

Structural and functional development of twelve newly established floodplain pond mesocosms

Structural and functional development of twelve newly established floodplain pond mesocosms

Avaliação dos efeitos de agrotóxicos em ecossistemas aquáticos tropicais utilizando organismos zooplanctônicos como bioindicadores

Pesticides in the Great Barrier Reef catchment area: Plausible risks to fish populations

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