Dataset Information

Multiyear dynamics of recent and legacy contaminants in a German hill-slope catchment (MS1 data)

ABSTRACT:

Anthropogenic activities cause the release of vast amounts of contaminants into the environment and thus also into surface- and groundwaters. Regulatory monitoring determines whether critical threshold concentrations are surpassed, by mostly occasional probing. This irregular testing, however, does not capture the intricacies of intra- and inter-annual contaminant dynamics, such as the emergence and mobilisation of contaminants in response to water flows. We report the detection and tracing of five contaminants in the 'Hainich Critical Zone Exploratory' (CZE) in central Germany, a monitoring site established for regular sampling of groundwater from different depths and locations along a hill-slope recharge area. The insect repellent DEET (N,N-diethyl-m-toluamide) and the coniferous resin acid 7-ODAA (7-oxodehydroabietic acids), the latter being volatilised from wood burning in ovens, show phases of seasonal dynamics in line with their release mode. Further, and alongside legacy herbicides (simazine and the triazine transformation product hydroxypropazine) and the concurrent flame retardant and plasticiser TPP (triphenyl phosphate), mobilisation events emerge from periods of high precipitation and water flows. This investigation highlights the persistence and mobilization of anthropogenic contaminants even in pristine environments. It illustrates the importance of long-term research for understanding ecosystem processes. The results add a note of caution for regulatory monitoring since also legacy contaminant levels may considerably vary over time.

MS1 data is reported in the current study MTBLS8433.

MS2 data is reported in MTBLS3533.

INSTRUMENT(S): Liquid Chromatography MS - alternating - reverse phase

SUBMITTER: Christian Zerfass

PROVIDER: MTBLS8433 | MetaboLights | 2024-06-04

REPOSITORIES: MetaboLights

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Project description:Anthropogenic activities cause the release of vast amounts of contaminants into the environment and thus also into surface- and groundwaters. Regulatory monitoring determines whether critical threshold concentrations are surpassed, by mostly occasional probing. This irregular testing, however, does not capture the intricacies of intra- and inter-annual contaminant dynamics, such as the emergence and mobilisation of contaminants in response to water flows. We report the detection and tracing of five contaminants in the 'Hainich Critical Zone Exploratory' (CZE) in central Germany, a monitoring site established for regular sampling of groundwater from different depths and locations along a hill-slope recharge area. The insect repellent DEET (N,N-diethyl-m-toluamide) and the coniferous resin acid 7-ODAA (7-oxodehydroabietic acids), the latter being volatilised from wood burning in ovens, show phases of seasonal dynamics in line with their release mode. Further, and alongside legacy herbicides (simazine and the triazine transformation product hydroxypropazine) and the concurrent flame retardant and plasticiser TPP (triphenyl phosphate), mobilisation events emerge from periods of high precipitation and water flows. This investigation highlights the persistence and mobilization of anthropogenic contaminants even in pristine environments. It illustrates the importance of long-term research for understanding ecosystem processes. The results add a note of caution for regulatory monitoring since also legacy contaminant levels may considerably vary over time. MS2 data is reported in the current study <a href='https://www.ebi.ac.uk/metabolights/MTBLS3533' rel='noopener noreferrer' target='_blank'>MTBLS3533</a>.MS1 data is reported in <a href='https://www.ebi.ac.uk/metabolights/MTBLS8433' rel='noopener noreferrer' target='_blank'>MTBLS8433</a>.

Project description:The copper redhorse (Moxostoma hubbsi) is an endangered fish endemic to Quebec, Canada that is only known to spawn in two locations within the Richelieu River, a waterway draining a significant area of agricultural land. Accordingly, concerns have been raised over the impacts that agricultural pesticide contamination of spawning grounds and nursery habitats within the Richelieu River may have on early life stage copper redhorse. We assessed the effects of contaminants on early life stages of copper redhorse and river redhorse (Moxostoma carinatum), a closely related fish that shares the copper redhorse’s habitat and spawning grounds but is distributed more widely and is not yet listed as endangered. Copper and river redhorse embryos (1000 each) were exposed to either Richelieu River water in an in-situ flow-through system or to laboratory water used as a control. We assessed embryos hatching time, incidence of deformities and survival in copper and river redhorses. We then performed RNA sequencing on copper redhorse larvae to better understand changes due to river water exposure. We identified 341 compounds in the river water that were absent from lab water. Pesticide concentrations in the river peaked following rainfall during the spawning season. Embryos exposed to river water hatched prematurely at 63.0 and 59.2 cumulative degree days (CDD) compared to 65.4 and 69.9 CDD in laboratory water for river and copper redhorse, respectively. Copper redhorse exposed to river water also had a significantly lower survival rate than laboratory water (73% vs. 93%). RNA sequencing of copper redhorse revealed 18 differentially expressed genes (DEGs) following river water exposure. Eight of the upregulated DEGs (cd44, il1b, lamb3, lamc2, tgm5, orm1, saa, acod1) are linked to immune function and injury response and 7 of the downregulated DEGs (cpa2, ctrb, cela2a, ctrl, cpa1, prss1, cel) are involved with digestion and nutrient absorption. This study provided valuable data on the effects of anthropogenic contaminants present in the Richelieu River and increased our knowledge on the individual and mixture effects they have on an endangered fish.

Project description:The diverse mixture of contaminants frequently present in estuarine wetlands complicates their assessment by routine chemical or biological analyses. We investigated the use of gene expression to assess contaminant exposure and the condition of southern California (USA) estuarine fish. Liver gene expression, plasma estradiol concentrations and gonad histopathology were used to investigate the biological condition of longjaw mudsuckers (Gillichthys mirabilis). A wide array of metals, legacy organochlorine pesticides, PCBs and contaminants of emerging concern were detected in sediments and whole fish. Overall gene expression patterns were characteristic to each of four sites investigated in this study. Differentially expressed genes belonged to several functional categories including xenobiotic metabolism, detoxification, disease and stress responses. In general, plasma estradiol concentrations were similar among fish from all areas. Some fish gonads had pathologic changes (e.g. infection, inflammation) that could indicate weakened immune systems and chronic stress. The differential expression of some genes involved in stress responses correlated with the prevalence of histologic gonad lesions. This study indicates that sentinel fish gene expression data is a promising tool for assessing the biological condition of fish exposed to environmental contaminants. Key Words: Gene expression, fish, contaminants, estuaries. This abstract belongs to a manuscript that has been submitted to Environmental Science and Technology. The manuscript has been invited as part of an especial Omics Issue which is expected to be published in 2012. In this study, we used hepatic gene expression in wild longjaw mudsuckers (Gillichthys mirabilis) to assess biological responses from anthropogenically influenced wetlands. We investigated the relationships among gene expression responses, chemical exposure and additional biological responses in this species. We studied estuarine wetlands that had diverse contaminant characteristics and received three main types of contaminant inputs in different proportions: agricultural runoff, urban runoff and municipal wastewater.

			Action	DRS
	MTBLS8433	Other
	FILES	Other
	a_MTBLS8433_LC-MS_alternating_reverse-phase_metabolite_profiling.txt	Txt
	i_Investigation.txt	Txt
	s_MTBLS8433.txt	Txt

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Multiyear dynamics of recent and legacy contaminants in a German hill-slope catchment (MS1 data)

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