Caspar A. Hallmann
Radboud University Nijmegen
18Publications
6H-index
538Citations
Publications 18
Newest
Published on Jun 1, 2018in Biological Invasions 3.05
S.T.E. Lommen7
Estimated H-index: 7
(University of Fribourg),
Caspar A. Hallmann6
Estimated H-index: 6
(Radboud University Nijmegen)
+ 24 AuthorsHüseyin Önen3
Estimated H-index: 3
(Gaziosmanpaşa University)
To better manage invasive populations, it is vital to understand the environmental drivers underlying spatial variation in demographic performance of invasive individuals and populations. The invasive common ragweed, Ambrosia artemisiifolia, has severe adverse effects on agriculture and human health, due to its vast production of seeds and allergenic pollen. Here, we identify the scale and nature of environmental factors driving individual performance of A. artemisiifolia, and assess their relat...
3 Citations Source Cite
Published on Apr 1, 2018in Methods in Ecology and Evolution 6.36
Marjolein Bruijning3
Estimated H-index: 3
(Radboud University Nijmegen),
Marco D. Visser8
Estimated H-index: 8
(Princeton University)
+ 1 AuthorsEelke Jongejans29
Estimated H-index: 29
(Radboud University Nijmegen)
3 Citations Source Cite
Published on Jan 1, 2017in Wildlife Biology 2.08
Maaike H. Avé , Berend Voslamber + 1 AuthorsJulia Stahl14
Estimated H-index: 14
Anthropogenic changes to the landscape such as fertilization and mowing schemes have been correlated with goslings obtaining a higher weight gain during the first weeks of their life, which in turn increases breeding success and survival at the adult stage. As goose numbers rise, conflicts with farmers become stronger as the birds use agricultural sites for foraging. In this study, habitat choice for individually marked greylag geese from four different rearing conditions, categorized by their t...
Source Cite
Published on Oct 18, 2017in PLOS ONE 2.77
Caspar A. Hallmann6
Estimated H-index: 6
(Radboud University Nijmegen),
Martin Sorg1
Estimated H-index: 1
+ 9 AuthorsThomas Hörren1
Estimated H-index: 1
Global declines in insects have sparked wide interest among scientists, politicians, and the general public. Loss of insect diversity and abundance is expected to provoke cascading effects on food webs and to jeopardize ecosystem services. Our understanding of the extent and underlying causes of this decline is based on the abundance of single species or taxonomic groups only, rather than changes in insect biomass which is more relevant for ecological functioning. Here, we used a standardized pr...
193 Citations Source Cite
Published on Aug 1, 2016in Journal of Applied Ecology 5.74
Job Aben7
Estimated H-index: 7
(University of Antwerp),
Greta Bocedi14
Estimated H-index: 14
(University of Aberdeen)
+ 6 AuthorsErik Matthysen44
Estimated H-index: 44
(University of Antwerp)
This study was supported by a VLIR-VLADOC scholarship and funding from the European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 661211 awarded to JA, research grants G.0055.08 G.0149.09 and G.0308.13 of Research Foundation Flanders (FWO), and the FWO Research Network on Eco-Evolutionary dynamics. SCFP and JMJT were supported by the project TenLamas funded by the French Ministere de l'Energie, de l'Ecologie, du Developpement Durable e...
17 Citations Source Cite
Published on Jan 1, 2015in Ibis 2.23
H.H. van Oosten1
Estimated H-index: 1
(Radboud University Nijmegen),
C. van Turnhout6
Estimated H-index: 6
(Radboud University Nijmegen)
+ 6 AuthorsH. Siepel17
Estimated H-index: 17
(Radboud University Nijmegen)
Dynamics of populations may be synchronized at large spatial scales, indicating driving forces acting beyond local scales, but may also vary locally as a result of site-specific conditions. Conservation measures for fragmented and declining populations may need to address such local effects to avoid local extinction before measures at large spatial scales become effective. To assess differences in local population dynamics, we aimed to determine the demographic drivers controlling population tre...
6 Citations Source Cite
Published on Mar 1, 2015in Molecular Ecology 6.13
Martin Husemann12
Estimated H-index: 12
(Martin Luther University of Halle-Wittenberg),
Laurence Cousseau3
Estimated H-index: 3
(Ghent University)
+ 4 AuthorsLuc Lens35
Estimated H-index: 35
(Ghent University)
The impact of demographic parameters on the genetic population structure and viability of organisms is a long-standing issue in the study of fragmented populations. Demographic and genetic tools are now readily available to estimate census and effective population sizes and migration and gene flow rates with increasing precision. Here we analysed the demography and genetic population structure over a recent 15year time span in five remnant populations of Cabanis’s greenbul (Phyllastrephus cabani...
9 Citations Source Cite
Published on Jul 1, 2014in Nature 41.58
Caspar A. Hallmann6
Estimated H-index: 6
,
R.P.B. Foppen22
Estimated H-index: 22
+ 2 AuthorsEelke Jongejans29
Estimated H-index: 29
The water concentrations of imidacloprid, a neonicotinoid pesticide, correlate with declines in farmland bird populations in the Netherlands.
252 Citations Source Cite
Published on Oct 1, 2014in Conservation Biology 5.89
Annemarieke Spitzen-van der Sluijs10
Estimated H-index: 10
(Ghent University),
A. Martel37
Estimated H-index: 37
(Ghent University)
+ 6 AuthorsFrank Pasmans48
Estimated H-index: 48
(Ghent University)
The inconsistent distribution of large-scale infection mediated die-offs and the subsequent population declines of several animal species, urges us to understand how, when, and why species are affected by disease. It is often unclear when or under what conditions a pathogen constitutes a threat to a host. Often, variation of environmental conditions plays a role. Globally Batrachochytrium dendrobatidis (Bd) causes amphibian declines; however, host responses are inconsistent and this fungus appea...
30 Citations Source Cite
Published on Apr 1, 2014in Journal of Ornithology 1.95
Toon Spanhove12
Estimated H-index: 12
(Ghent University),
Tom Callens9
Estimated H-index: 9
(Ghent University)
+ 2 AuthorsLuc Lens35
Estimated H-index: 35
(Ghent University)
High levels of nest predation influence the population dynamics of many tropical birds, especially when deforestation alters nest predator communities. The consequences of tropical forest fragmentation on nest predation, however, remain poorly understood, as natural predation patterns have only been well documented in a handful of tropical forests. Here, we show the results of an extensive study of predation on natural nests of Cabanis’s Greenbul (Phyllastrephus cabanisi) during 3 years in a hig...
7 Citations Source Cite
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