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David J Gladbach

David J Gladbach

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19
Publications
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257
Citations

Publications

Publications (19)
Poster
Full-text available
In 2015 and 2016 a subgroup of the international ring test for the standardisation of a 10-day chronic feeding test on honey bees in the laboratory (including five laboratories) performed a total of 70 10-day chronic feeding studies. These studies investigated the potential use of solvents (acetone, dimethyl sulfoxide (DMSO), dimethylacetamide (DMA...
Article
Full-text available
Although honeybee risk assessment for chemicals has been rigorously revised recently, methods and techniques available for non-apis pollinators are scarce. An ICPPR working group " non-apis " was established in 2013 to address these knowledge gaps. Acute contact tests were designed and performed with solitary bees Osmia sp. but still require furthe...
Article
Full-text available
The impact of climate change on herbivorous insects can have far-reaching consequences for ecosystem processes. However, experiments investigating the combined effects of multiple climate change drivers on herbivorous insects are scarce. We independently manipulated three climate change drivers (CO2, warming, drought) in a Danish heathland ecosyste...
Article
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Climate change has been shown to affect ecosystem process rates and community composition, with direct and indirect effects on belowground food webs. In particular, altered rates of herbivory under future climate can be expected to influence above-belowground interactions. Here, we use a multifactor, field-scale climate change experiment and indepe...
Article
Full-text available
The measurement of faecal glucocorticoid metabolites is used as a non-invasive technique to study stress in animal populations. They have been used most widely in mammals, and mammalian studies have also treated issues such as sample stability and storage methods. In birds, faecal corticosterone metabolite (CM) assays have been validated for a smal...
Article
Full-text available
In many bird species, achromatic plumage patch size can serve as a male status signal, but the use of variations in the achromatic colours themselves as a quality signal has only recently come into focus. In our study, we sought to determine whether achromatic plumage reflects individual quality in the upland goose (Chloephaga picta leucoptera). We...
Article
Ecosystem processes in agricultural landscapes are often triggered by resource availability in crop and noncrop habitats. We investigated how oilseed rape (OSR; Brassica napus, Brassicaceae) affects noncrop plants in managed systems and semi-natural habitat, using trophic interactions among wild mustard (Sinapis arvensis, Brassicaceae), rape pollen...
Article
Full-text available
Although studies on the evolution and function of female ornaments have become more numerous in the last years, the majority of these studies were carried out in cases where female ornaments were a smaller and duller version of the ornaments found in males. There are substantially fewer studies on species with female-specific ornaments. However, no...
Article
Full-text available
Several studies have shown that waterfowl females in good condition lay larger clutches and start egg-laying earlier in a breeding season. However, most of these studies lack corresponding data on individual condition and timing of breeding in different years. We analysed data on clutch size, egg size, hatching date and female body condition of a n...
Article
The analysis of plasma biochemistry and haematology to monitor the condition of birds in the wild has been found a useful tool in ecological research. Despite biparental investment in most wild birds studied, some studies of condition indices found sex differences, and attributed these to the costs of egg formation or brooding in females or a highe...

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Projects

Project (1)
Project
CLIMAITE is a Danish research center investigating how biological processes and ecosystems will be affected by climate change. The CLIMAITE project experimentally simulates a scenario predicted by climate scientists for the year 2075. The idea is simply to turn the clock forward 70 years and artificially create future climate in a testing ground in the wild and examine the effects. The core of CLIMAITE's activities is a new joint attempt to simultaneously manipulate CO2, temperature and rainfall. Knowledge about climate change effects on biological processes and ecosystems will be important for policy decisions and actions to counteract or directly prevent climate change.