Frederik Hendrickx

Frederik Hendrickx
Royal Belgian Institute of Natural Sciences · Entomology

Professor

About

152
Publications
43,716
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5,231
Citations
Citations since 2016
42 Research Items
2814 Citations
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400
20162017201820192020202120220100200300400

Publications

Publications (152)
Article
Free-living bacteria have evolved multiple times to become host-restricted endosymbionts. The transition from a free-living to a host-restricted lifestyle comes with a number of different genomic changes, including a massive loss of genes. In host-restricted endosymbionts, gene inactivation and genome reduction are facilitated by mobile genetic ele...
Preprint
Full-text available
Archipelago island fauna include some of the most compelling examples of parallel adaptation to ecological gradients. However, despite the insuslar nature of these systems, the possibility that repeated instances of within-island divergence resulted from independent ( in situ ) evolutionary rather than repeated colonization events remains most ofte...
Preprint
Full-text available
Free-living bacteria have evolved multiple times to become host-restricted endosymbionts. The transition from a free-living to a host-restricted lifestyle comes with a number of different genomic changes, including a massive loss of genes. In host-restricted endosymbionts, gene inactivation and genome reduction is facilitated by mobile genetic elem...
Preprint
Full-text available
Bacterial endosymbionts of the groups Wolbachia, Cardinium and Rickettsiaceae are well-known for their diverse effects on their arthropod hosts, ranging from mutualistic relationships to reproductive phenotypes. Here, we analyzed a unique system in which the dwarf spider Oedothorax gibbosus is co-infected with up to five different endosymbionts aff...
Article
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The phylum Chlamydiae consists of obligate intracellular bacteria including major human pathogens and diverse environmental representatives. Here we investigated the Rhabdochlamydiaceae, which is predicted to be the largest and most diverse chlamydial family, with the few described members known to infect arthropod hosts. Using published 16 S rRNA...
Preprint
Full-text available
The phylum Chlamydiae consists of obligate intracellular bacteria including major human pathogens and diverse environmental representatives. Here we investigated the Rhabdochlamydiaceae, which is predicted to be the largest and most diverse chlamydial family, with the few described members known to infect arthropod hosts. Using published 16S rRNA g...
Article
Full-text available
In many species, individuals can develop into strikingly different morphs, which are determined by a simple Mendelian locus. How selection shapes loci that control complex phenotypic differences remains poorly understood. In the spider Oedothorax gibbosus, males develop either into a ‘hunched’ morph with conspicuous head structures or as a fast-dev...
Article
Full-text available
Alle Taxa Biodiversiteit Inventarisatie en 30 jaar natuurbeheer
Preprint
Full-text available
In many species, individuals can develop into strikingly different morphs, which are determined by a simple Mendelian locus. How selection shapes loci that control complex phenotypic differences remains poorly understood. In the spider Oedothorax gibbosus, males either develop into a "hunched" morph with conspicuous head structures or as a fast dev...
Article
Full-text available
We present the first comprehensive review of the ant taxa of the Galápagos archipelago. The review is based on data gathered during literature searches, field surveys, and the revision of museum specimens, and includes information on the distribution, habitat, and ecology of 47 species. At least nine of these species are assumed to be native or end...
Article
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The increased input of nutrients into biological systems has been shown to result in altered biotic interactions through changes in food availability. The aim of this study was to test for an association between phytoplankton nutrient content and epibiont variables in natural zooplankton populations. Via a field survey, we studied how a gradient in...
Article
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Climatic changes can induce geographic expansion and altitudinal shifts in the distribution of invasive species by offering more thermally suitable habitats. At the remote sub-Antarctic Kerguelen Islands, the predatory insect Merizodus soledadinus (Coleoptera: Carabidae), introduced in 1913, rapidly invaded coastal habitats. More recent colonisatio...
Article
The increasing urbanization process is hypothesized to drastically alter (semi‐)natural environments with a concomitant major decline in species abundance and diversity. Yet, studies on this effect of urbanization, and the spatial scale at which it acts, are at present inconclusive due to the large heterogeneity in taxonomic groups and spatial scal...
Article
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We present records of seven new carabid species for Belgium as well as new records of 67 rare carabid species collected or identified in Belgium mainly during the period 2008-2018. Detailed information about these records is discussed in relation to previously available distributional or taxonomic knowledge. These recent records improve the general...
Article
Full-text available
In species with chromosomal sex determination, X chromosomes are predicted to evolve faster than autosomes because of positive selection on recessive alleles or weak purifying selection. We investigated X chromosome evolution in Stegodyphus spiders that differ in mating system, sex-ratio, and population dynamics. We assigned scaffolds to X chromoso...
Article
Full-text available
When environments change, populations may adapt surprisingly fast, repeatedly and even at microgeographic scales. There is increasing evidence that such cases of rapid parallel evolution are fueled by standing genetic variation, but the source of this genetic variation remains poorly understood. In the saltmarsh beetle Pogonus chalceus, short-winge...
Cover Page
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The drawing depicts the importance of admixture for fast and repeated evolution of two ecotypes of the saltmarsh beetle Pogonus chalceus. Long- and short-winged ecotypes of P. chalceus have diverged repeatedly along the Atlantic European coast in response to contrasting hydrological regimes. The repeated evolution is driven by an initial ancient an...
Article
Full-text available
Research within the SPEEDY-network has shown that urbanisation has an effect on the parasite and symbiont community. In a few cases urbanisation was associated with a reduction in the number of micro-organisms associated with the host. Nevertheless there are species specific responses: particular species increase and others decrease in the city. Th...
Article
Full-text available
Urbanization drastically alters the environment and landscape configuration. Data from four aquatic and eight terrestrial organism groups, obtained within the framework of the SPEEDY project, reveals that an increase in built-up area strongly affects the composition of our native fauna. This change in community composition is due to the selection o...
Article
Full-text available
Body size is intrinsically linked to metabolic rate and life-history traits, and is a crucial determinant of food webs and community dynamics. The increased temperatures associated with the urban-heat-island effect result in increased metabolic costs and are expected to drive shifts to smaller body sizes. Urban environments are, however, also chara...
Article
Full-text available
Our planet is urbanizing rapidly and Belgium (Flanders in particular) is characterized by a high degree of urbanization. Among biologists there is a growing interest to study the ecological and evolutionary consequences of urbanization since urban areas differ in multiple ways from the environments surrounding cities. During six years a consortium...
Article
Sex allocation theory predicts that when sons and daughters have different reproductive values, parents should adjust offspring sex ratio towards the sex with the higher fitness return. Haplo-diploid species directly control offspring sex ratio, but species with chromosomal sex determination (CSD) were presumed to be constrained by Mendelian segreg...
Article
Pilot studies indicate that shifts in the nematode species composition, life strategies and feeding behavior during composting appear to be fairly consistent and, therefore, promising as a potential tool to assess compost maturity. However, this has been only based on a limited number of, mainly, non-replicated observations. In this study, we teste...
Preprint
Full-text available
When species occur in repeated ecologically distinct habitats across their range, adaptation may proceed surprisingly fast and result in parallel evolution. There is increasing evidence that such cases of rapid parallel evolution are fueled by standing genetic variation, but the origin of this genetic variation remains poorly understood. In Pogonus...
Article
Full-text available
Our planet is urbanizing rapidly and Belgium (Flanders in particular) is characterized by a high degree of urbanization. Among biologists there is a growing interest to study the ecological and evolutionary consequences of urbanization since urban areas differ in multiple ways from the environments surrounding cities. During six years a consortium...
Article
The use of image data to quantify, study and compare variation in the colors and patterns of organisms requires the alignment of images to establish homology, followed by color-based segmentation of images. Here we describe an R package for image alignment and segmentation that has applications to quantify color patterns in a wide range of organism...
Conference Paper
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Until now 50 ant species have been recorded from the Galapagos Archipelago. Yet, for more than half of them it is still unclear if they are native to the Galapagos or if they are alien introductions. This uncertainty is due to, amongst others, the fact that the ant fauna of mainland South America is far less studied, which renders it difficult to u...
Article
The salt marsh beetle Pogonus chalceus has diverged into short- and long-winged populations, which can be found in hundreds of interlaced habitat patches that sharply differ in their hydrological regime. In a recent study, we investigated how a behavioral adaptation to these contrasting hydrological regimes might drive the neat spatial sorting of t...
Article
The salt marsh beetle Pogonus chalceus has diverged into short‐ and long‐winged populations, which can be found in hundreds of interlaced habitat patches that sharply differ in their hydrological regime. In a recent study, we investigated how a behavioral adaptation to these contrasting hydrological regimes might drive the neat spatial sorting of t...
Article
Full-text available
Identifying patterns in the effects of temperature on species' population abundances could help develop a general framework for predicting the consequences of climate change across different communities and realms. We used long-term population time series data from terrestrial, freshwater, and marine species communitieswithin central Europe to comp...
Article
Full-text available
In the period 2000-2001 nature restoration projects drastically reshaped the Nature Reserve in Lombardsijde near the Ijzer Estuary in Flanders, Belgium. Dikes were constructed and new dune grasslands were installed. Seven years after the restoration the ant fauna of these newly created sites was compared with reference sites from foredunes, dune gr...
Article
The use of image data to quantify, study and compare variation in the colors and patterns of organisms requires the alignment of images to establish homology, followed by color-based segmentation of images. Here we describe an R package for image alignment and segmentation that has applications to quantify color patterns in a wide range of organism...
Preprint
Full-text available
The use of image data to quantify, study and compare variation in the colors and patterns of organisms requires the alignment of images to establish homology, followed by color-based segmentation of images. Here we describe an R package for image alignment and segmentation that has applications to quantify color patterns in a wide range of organism...
Article
Full-text available
Climate change, land-use change, pollution and exploitation are among the main drivers of species’ population trends; however, their relative importance is much debated. We used a unique collection of over 1,000 local population time series in 22 communities across terrestrial, freshwater and marine realms within central Europe to compare the impac...
Article
The increasing conversion of agricultural and natural areas to human-dominated urban landscapes is predicted to lead to a major decline in biodiversity worldwide. Two conditions that typically differ between urban environments and the surrounding landscape are increased temperature, and high patch isolation and habitat turnover rates. However, the...
Article
Comprehensive studies to identify species-specific drivers of survival to environmental stress, reproduction, growth, and recruitment are vital to gaining a better understanding of the main ecological factors shaping species habitat distribution and dispersal routes. The present study performed a field-based assessment of habitat distribution in th...
Article
Adaptation to a previously unoccupied niche within a single population is one of the most contentious topics in evolutionary biology as it assumes the simultaneous evolution of ecologically selected and preference traits. Here, we demonstrate behavioral adaptation to contrasting hydrological regimes in a sympatric mosaic of Pogonus chalceus beetle...
Article
Full-text available
Genetic conflict theory predicts strong selection for host nuclear factors suppressing endosymbiont effects on reproduction, however, evidence of these suppressors is currently scarce. This can either be caused by a low suppressor evolution rate, or if suppressors originate frequently, by rapid spread and concurrent masking of their activity by sil...
Article
Full-text available
1. We investigated ant communities in all main vegetation zones of the model island of Santa Cruz in the Galápagos archipelago (155 collection points, spread over 21 sites; 28 ant species collected), and evaluated the distribution, coexistence, and effect of environmental factors in a community composed of endemic, probably endemic, and introduced...
Book
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In 1994 startte Natuurpunt in Destelbergen met de uitbouw van het natuurgebied Damvallei. De resultaten van meer dan 20 jaar natuurbeheer zijn nu gevat in een fotoboek ‘De Damvallei, een beeldend verhaal’. Een verbluffend boek over de veerkracht van de natuur. Het succesverhaal van de Damvallei illustreert dat de vernietiging van de natuur niet ono...
Article
Generalist arthropod herbivores rapidly adapt to a broad range of host plants. However, the extent of transcriptional reprogramming in the herbivore and its hosts associated with adaptation remains poorly understood. Using the spider mite Tetranychus urticae and tomato as models with available genomic resources, we investigated the reciprocal genom...
Article
The expected strong directional selection for traits that increase a male's mating ability conflicts with the frequent observation that within species, males may show extreme variation in sexual traits. These male reproductive polymorphisms are usually attributed to direct male-male competition. It is currently unclear, however, how directional sel...
Article
When environmental gradients are repeated on different islands within an archipelago, similar selection pressures may act within each island resulting in the repeated occurrence of ecologically similar species on each island. The evolution of ecotypes within such radiations may either result from dispersal, i.e. each ecotype evolved once and disper...
Article
Full-text available
The microbial community of spiders is little known, with previous studies focussing primarily on the medical importance of spiders as vectors of pathogenic bacteria and on the screening of known cytoplasmic endosymbiont bacteria. These screening studies have been performed by means of specific primers that only amplify a selective set of endosymbio...
Article
Full-text available
Citation: Dekoninck W, Maebe K, Breyne P, Frederik Hendrickx F (2014) Polygyny and strong genetic structuring within an isolated population of the wood ant Formica rufa. Abstract Social structuring of populations within some Formica species exhibits considerable variation going from monodomous and monogynous populations to polydomous, polygynous po...
Article
Studying the evolutionary history of trait divergence, in particular those related to dispersal capacity, is of major interest for the process of local adaptation and metapopulation dynamics. Here, we reconstruct the evolution of different alleles at the nuclear encoded mitochondrial NADP(+) -dependent isocitrate dehydrogenase (mtIdh) locus of the...
Article
Full-text available
Producing equal amounts of male and female offspring has long been considered an evolutionarily stable strategy. Nevertheless, exceptions to this general rule (i.e. male and female biases) are documented in many taxa, making sex allocation an important domain in current evolutionary biology research. Pinpointing the underlying mechanism of sex rati...
Article
Full-text available
Spiders exhibit a remarkable variety of reproductive phenotypes such as induced parthenogenesis and reproductive skew in primary sex ratio. However, observations of distorted sex ratios are mainly inferred from field catches of adult individuals, whereas detailed information on clutch primary sex ratio and sex ratio inheritance, resulting from mult...
Article
Full-text available
Local extinction of specialist species due to fragmentation is one of the major causes of biodiversity loss. Increased extinction rates in smaller fragments are expected to result from both smaller local population sizes, which increase the effect of environmental or demographic stochasticity, and increased edge effects. The relative effect sizes o...
Technical Report
Full-text available
Many species and biotopes are struggling to survive in the Flemish region of Belgium, an area that is highly impacted by human presence. Nature policy tries to halt the current biodiversity crisis by implementing both area and species based conservation measures. Area based conservation measures aim to guarantee a minimum level of quality that serv...
Article
Full-text available
Local adaptation likely involves selection on multiple, genetically unlinked traits to increase fitness in divergent habitats. Conversely, recombination is expected to counteract local adaptation under gene flow by breaking down adaptive gene combinations. Western European populations of the salt marsh beetle Pogonus chalceus are characterized by l...
Article
Full-text available
According to the ideal free distribution (IFD) theory, individuals that are able to perceive the quality of different patches in a landscape and disperse freely are expected to redistribute themselves proportionally to the carrying capacities of heterogeneous patches. Here, we argue that, when dispersal is unconditional and genetically fixed, a coa...
Article
Full-text available
Behavioral isolation may play an important role in speciation. However, the roles of divergence time and ecological specialization on the evolution of intrinsic barriers to gene flow are poorly understood. On the Galapagos, ecotypic differentiation of Hogna Simon 1885 wolf spiders has led to the repeated evolution of morphologically distinct high-e...
Article
Full-text available
Mosquito (Diptera: Culicidae) distribution data from a recent inventory of native and invading mosquito species in Belgium were compared with historical data from the period 1900-1960 that were retrieved from a revision of the Belgian Culicidae collection at the Royal Belgian Institute of Natural Sciences. Both data sets were used to investigate tr...
Article
Full-text available
We mention the rediscovery of the very rare carabid beetle Pogonus luridipennis (Germar, 1822) in the IJzer Estuary in Nieuwpoort in the spring of 2007. Samenvatting We vermelden de herontdekking van de zeer zeldzame loopkeversoort Pogonus luridipennis (Germar, 1822) in het IJzer estuarium te Nieuwpoort in de lente van 2007. Résumé Nous mentionnons...
Article
Full-text available
The salt marsh beetle Pogonus chalceus represents a unique opportunity to understand and study the origin and evolution of dispersal polymorphisms as remarkable inter-population divergence in dispersal related traits (e.g. wing development, body size and metabolism) has been shown to persist in face of strong homogenizing gene flow. Sequencing and...