Oscar Franken

Oscar Franken
University of Groningen | RUG · GELIFES

PhD

About

29
Publications
10,739
Reads
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1,380
Citations
Introduction
As a community ecologist I am intrigued by the diversity of life on our planet, specifically in soil ecosystems. How all these species interact with each other to form functioning ecosystems is fascinating, and the main focus of my research is to understand how interactions in these complex communities will be altered by abiotic and biotic changes.
Additional affiliations
May 2019 - February 2020
Vrije Universiteit Amsterdam
Position
  • PostDoc Position

Publications

Publications (29)
Article
Full-text available
Extreme climatic events can have profound effects on ecosystems. Climate change is causing an increase in the frequency and intensity of extreme events, which raises the probability that natural ecosystems will be exposed to subsequent or simultaneous extreme events. Exposure to multiple extreme events may involve very different abiotic stressors,...
Article
Full-text available
Temperature extremes are predicted to increase in frequency, intensity and duration under global warming and are believed to significantly affect community composition and functioning. However, the effect of extreme climatic events on communities remains difficult to predict, especially because species can show dissimilar responses to abiotic chang...
Article
Full-text available
Plants and their arbuscular mycorrhizal fungal symbionts interact in complex underground networks involving multiple partners. This increases the potential for exploitation and defection by individuals, raising the question of how partners maintain a fair, two-way transfer of resources. We manipulated cooperation in plants and fungal partners to sh...
Article
Sublethal effects of toxicants may cumulate over time and become apparent only when test organisms are exposed for multiple generations. In this study we determined phenotypic effects and transcriptional responses in the parthenogenetic soil invertebrate Folsomia candida over four generations, followed by two generations of recovery. Animals were e...
Preprint
Full-text available
Soil life supports the functioning and biodiversity of terrestrial ecosystems. Springtails (Collembola) are among the most abundant soil animals regulating soil fertility and flow of energy through above- and belowground food webs. However, the global distribution of springtail diversity and density, and how these relate to energy fluxes remains un...
Book
Full-text available
This Handbook of methods aim to provide the different techniques and methodologies to obtain a minimum data set of variables, from soil biodiversity assessment to SOM dynamics, including, isotope analysis, bioturbation assessment and metagenomics. With the knowledge gathered in forthcoming projects and studies, researchers (biogeochemists and soil...
Article
Full-text available
Carbon cycling models consider soil carbon sequestration a key process for climate change mitigation. However, these models mostly focus on abiotic soil processes and, despite its recognized critical mechanistic role, do not explicitly include interacting soil organisms. Here, we use a literature study to show that even a relatively simple soil com...
Article
Full-text available
Urban development and species invasion are two major global threats to biodiversity. These threats often co‐occur, as developed areas are more prone to species invasion. However, few empirical studies have tested if both factors affect biodiversity in similar ways. Here we study the individual and combined effects of urban development and plant inv...
Poster
Full-text available
Soil ecosystems around the world are currently either directly or indirectly affected by human influences. This often poses a challenge on the performance and survival of species inhabiting these ecosystems, and alter the interactions between species. Examples of such disturbances are the application of different kinds of pesticides to optimize foo...
Article
Despite great advances, experiments concerning the response of ecosystems to climate change still face considerable challenges, including the high complexity of climate change in terms of environmental variables, constraints in the number and amplitude of climate treatment levels, and the limited scope of responses and interactions covered. Drawing...
Article
Full-text available
*English below* De vormenrijkdom binnen de miljoenpoten is groot, van het penseeltje met een kort gedrongen lichaam en veel lange, afstaande haren, tot langgerekte, slangvormige soorten en soorten die zich kunnen oprollen tot een balletje. De platrugmiljoenpoten zijn makkelijk te herkennen aan de afgeplatte lichaamssegmenten. Vanaf de voorkant beke...
Article
Full-text available
The functional relationship between arbuscular mycorrhizal fungi (AMF) and their hosts is variable on small spatial scales. Here, we hypothesized that herbivore exclusion changes the AMF community and alters the ability of AMF to enhance plant tolerance to grazing. We grew the perennial bunchgrass, Themeda triandra Forssk in inoculum from soils col...
Article
Full-text available
In het weekend van 3 tot en met 5 juni 2016 is de 171e zomerbijeenkomst van de NEV gehouden. Dit jaar hebben de 47 deelnemers 48 kilometerhokken in de Noord-Hollandse duinen geïnventariseerd op geleedpotigen. In totaal zijn er 1313 soorten insecten en andere geleedpotigen gevonden. Er zijn maar liefst elf nieuwe soorten voor Nederland gevonden, waa...
Article
Full-text available
Since the discovery of Eluma caelatum (Miers, 1877) in the Netherlands close to the Belgium boarder in the mid 1990's, various attempts have been made to find this isopod species in Belgium. However, these attempts have been unsuccessful until a joint excursion of Belgian and Dutch isopod researchers searched for this enigmatic species once more in...
Article
Full-text available
Entomological fauna of Ede and its surrounding area. Report of the 170th summer meeting of the Netherlands Entomological Society. During the weekend of 5-7 July 2015 the 170th annual summer meeting of the Netherlands Entomological Society took place in the area surrounding the municipalities Ede and Wekerom in the province of Gelderland. The area...
Article
Full-text available
The world beneath our feet. This special issue of ‘Entomologische Berichten’ is dedicated to soil, because of the international year of soils in 2015. This year was organised to bring the loss of soil health to the attention of the general public. Soil is the source of all life on earth, and its diversity of species can surpass the aboveground spe...
Article
Full-text available
The crucial role of soil type on the distribution of soil fauna. In terms of biodiversity, the soil is an extremely rich component of many ecosystems. A plethora of invertebrates spend their whole life in the soil, whereas others are only bound to the soil for a specific part of their life cycle. The mechanisms underlying and causing this huge dive...
Article
Full-text available
Entomological fauna of the National Park Drents-Friese Wold, A report of the 169th summer meeting of the Netherlands Entomological Society. During the weekend of 30 May to the 1st of July, 2014 the 169th annual summer meeting of the Netherlands Entomological Society took place in the National Park Drents-Friese Wold in the northern provinces Frysl...
Article
Arbuscular mycorrhizal fungi exchange soil nutrients for carbon from plant hosts. Empirical works suggests that hosts may selectively provide resources to different fungal species, ultimately affecting fungal competition. However, fungal competition may also be mediated by colonization strategies of the fungi themselves. To test whether host qualit...
Article
Full-text available
The characteristic species composition of Caribbean mangrove-associated sponge communities is very distinct from sponge communities living on nearby reefs, but the primary mechanisms that underlie this distinction remain uncertain. The objectives of this study were therefore to elucidate the relative importance of substrate and habitat in the abili...
Article
Increasing concern about pollution of our environment calls for advanced and rapid methods to estimate ecological toxicity. The use of gene expression microarrays in environmental studies can potentially meet this challenge. We present a novel method to examine soil toxicity. We exposed the collembolan Folsomia candida to soil containing an ecologi...

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Projects

Projects (3)
Project
Wadden Mosaic is a project that focuses on a better understanding of the underwater nature in the Dutch Wadden Sea. Specific attention is paid to the deeper parts that are permanently submerged, even at low tide: the subtidal Wadden Sea.