Paul Henning Krogh

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In agricultural soil, a suite of anthropogenic events shape the ecosystem processes and populations. However, the impact from anthropogenic sources on the soil environment is almost exclusively assessed for chemicals, although other factors like crop and tillage practices have an important impact as well. Thus, the farming system as a whole should be(More)
BACKGROUND Normalization of target gene expression, measured by real-time quantitative PCR (qPCR), is a requirement for reducing experimental bias and thereby improving data quality. The currently used normalization approach is based on using one or more reference genes. Yet, this approach extends the experimental work load and suffers from assumptions that(More)
The European Food Safety Authority (EFSA) asked the Panel on Genetically Modified Organisms to establish a self-tasking Working Group with the aim of (1) producing a scientific review of the current guidance of the GMO Panel for Environmental Risk Assessment (ERA), focusing on the potential impacts of GM plants on Non-Target Organisms (NTOs), (2) proposing(More)
Transgenic rice expressing Bacillus thuringiensis (Bt) endotoxins (Bt rice) for pest control is considered an important solution to food security in China. However, tests for potential effects on non-target soil organisms are required for environmental risk assessment. The soil collembolan Folsomia candida L. (Collembola: Isotomidae) is a potential(More)
BACKGROUND AND METHODS Assessing the effects of pesticide hazards on microbiological processes in the soil is currently based on analyses that provide limited insight into the ongoing processes. This study proposes a more comprehensive approach. The side effects of pesticides may appear as changes in the expression of specific microbial genes or as changes(More)
For the elucidation of effects of a pesticide on life-cycle parameters of arthropods, applicable in the development of ecotoxicological test procedures with soil living animals, attention was drawn to body growth, which has previously been described as a sensitive parameter in Collembola. Body growth of the following three soil-dwelling arthropods was(More)
How species interact modulate their dynamics, their response to environmental change, and ultimately the functioning and stability of entire communities. Work conducted at Zackenberg, Northeast Greenland, has changed our view on how networks of arctic biotic interactions are structured, how they vary in time, and how they are changing with current(More)
Background: Bt crops modified by inserting and expressing the Cry toxin from Bacillus thuringiensis have raised environmental concerns over consequences for sustainability of soil biodiversity and ecosystems services in agricultural land. Part of this concern is related to the possible effects of the exposure to Cry toxins of non-target soil invertebrates(More)
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