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Verena C. Schreiner
EcosystemPesticideEcologySTREAMSFungicide
4Publications
2H-index
48Citations
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Publications 8
Newest
#1Nadin GrafH-Index: 2
Last. Jochen P. ZubrodH-Index: 16
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Examining the effects of pesticides is difficult in regions such as Western Europe because of the relatively ubiquitous use of agrochemicals and the lack of unaffected areas. To study a wide gradient of agrochemical stress, we conducted a study in Central Romania, where traditional agriculture, which is assumed to use less agrochemicals, exists adjacent to intensive agriculture. We investigated potential effects of land use related stressors including pesticides on aquatic–terrestrial predator–p...
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Rain events may impact the chemical pollution burden in rivers. Forty-four small streams in Germany were profiled during several rain events for the presence of 395 chemicals and five types of mixt...
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Abstract Pesticide concentrations in agricultural streams are often characterised by a low level of baseline exposure and episodic peak concentrations associated with heavy rainfall events. Traditional sampling methods such as grab sampling, which are still largely used in governmental monitoring, typically miss peak concentrations. Passive sampling represents a cost-efficient alternative but requires the additional determination of sampling rates to calculate time-weighted average (TWA) water c...
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#1Andreas Scharmüller (University of Koblenz and Landau)H-Index: 2
Last. Ralf B. Schäfer (University of Koblenz and Landau)H-Index: 31
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An increasing number of chemicals such as pharmaceuticals, pesticides and synthetic hormones are in daily use all over the world. In the environment, chemicals can adversely affect populations and communities and in turn related ecosystem functions. To evaluate the risks from chemicals for ecosystems, data on their toxicity, which are typically produced in standardized ecotoxicological laboratory tests, is required. The results from ecotoxicological tests are compiled in (meta-)databases such as...
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#1Nadin GrafH-Index: 2
Last. Ralf B. SchäferH-Index: 31
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Abstract Freshwater ecosystems are coupled with their riparian area. Emerging insects are prey for predators in the riparian zone, enriching the terrestrial ecosystem with energy and nutrients. Stressors associated with agriculture can alter insect communities in water and on land, resulting in complex response patterns of terrestrial predators relying on prey from both systems. Examining the effects from individual agricultural stressors such as pesticides is hampered in landscapes with intensi...
2 CitationsSource
#2Alexander Feckler (SLU: Swedish University of Agricultural Sciences)H-Index: 6
Last. Ralf B. SchäferH-Index: 31
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Determining whether the structural and functional stress responses of communities are similar across space and time is paramount for forecasting and extrapolating the consequences of anthropogenic pressures on ecosystems and their services. Stream ecosystems are under high anthropogenic pressure; however, studies have only examined the response of stream communities across large scales over multiple generations. We studied the responses of leaf-associated microbial communities in streams within ...
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Abstract Given the multitude of pesticides used in agriculture, adjacent streams are typically exposed to pesticide mixtures. Previous studies analysed the ecological risks of a few pesticide mixtures or were limited to an individual region or crop, whereas a large scale analysis of pesticide mixtures is missing. We analysed routine monitoring data from Germany, France, the Netherlands and the USA comprising a total of 4532 sites and 56,084 sampling occasions with the aim to identify the most fr...
39 CitationsSource
#1Diego P. FernandezH-Index: 13
Last. Ralf B. SchäferH-Index: 31
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Abstract Nutrient and pesticide pollution are widespread agricultural stressors. Fungicides may affect freshwater fungi, which play an important role in litter decomposition (LD), whereas moderate nutrient enrichment can stimulate LD. We examined potential interaction effects of nutrients and fungicides on decomposer communities and LD in a 14-day two-factorial (fungicide and nutrient treatments) mesocosm experiment. Fungicide exposure was limited to 4 days to simulate episodic contamination. On...
7 CitationsSource
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