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Henk Siepel
Radboud University Nijmegen
151Publications
19H-index
2,224Citations
Publications 151
Newest
#1Anne-Jifke HaarsmaH-Index: 2
#2Peter H. C. LinaH-Index: 6
Last.Henk SiepelH-Index: 19
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#1Henk Siepel (Radboud University Nijmegen)H-Index: 19
#2Roland Bobbink (Radboud University Nijmegen)H-Index: 39
Last.Eelke Jongejans (Radboud University Nijmegen)H-Index: 30
view all 5 authors...
We tested the long-term effects of liming on soil micro-arthropods in a stand of Scotch pine on former drift sand in the Netherlands. To counteract the effects of acidification, liming was applied in increasing quantities from 0 (control), 3, 6, 9 and 18 ton ha−1 on experimental plots over the course of 1985 and 1986. Soil samples for chemical analyses and those for extraction of soil micro-arthropods were taken in October 2017, 32 years after application. Liming did restore the buffer capacity ...
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#1Anne-Jifke Haarsma (Radboud University Nijmegen)H-Index: 3
#2Peter H. C. Lina (Naturalis)H-Index: 6
Last.Henk Siepel (Radboud University Nijmegen)H-Index: 19
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During autumn in the temperate zone, insectivorous male bats face a profound energetic challenge, as in the same period they have to make energy choices related to hibernation, mating and migration. We found evidence by looking at biometric measurements that male pond bats (Myotis dasycneme) are pre-occupied with mating and lose weight, while simultaneously females are accumulating fat. Our purpose was to characterize the known hibernacula in terms of male or female bias, and subsequently compar...
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#1H. Herman van Oosten (Radboud University Nijmegen)H-Index: 3
Last.Henk Siepel (Radboud University Nijmegen)H-Index: 19
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Population growth in passerine birds is largely driven by fecundity. If fecundity is affected, for instance by hatching failure, populations may decline. We noted high hatching failure of up to 27% per year in relict populations of the Northern wheatear (Oenanthe oenanthe) in The Netherlands, a strongly declining, migratory passerine in Europe. This hatching failure itself can cause population decline, irrespective of other adverse factors. Additionally, we investigated the cause of hatching fai...
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#1R.J. BijlsmaH-Index: 5
#2E. AgrilloH-Index: 9
Last.H.V. WinterH-Index: 1
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#1Jeltje M. StamH-Index: 5
Last.Henk SiepelH-Index: 19
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Recently, the alarming decrease of insect populations has received much attention, especially since the publication of a German study that showed strong decline of insects in nature reserves. Similar declines may be expected in the Netherlands, but many knowledge gaps exist about what we already know about the current situation and what influences the species composition of insects. This report aims to use information from an existing dataset to explore the species composition of insects in Dutc...
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#1Roland BobbinkH-Index: 39
#2A.B. van den BurgH-Index: 1
Last.M.J. WeijtersH-Index: 2
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Sinds het midden van de vorige eeuw heeft de Nederlandse natuur te lijden gehad van overmatige zuur- en stikstofdepositie. Maatregelen om de effecten hiervan te bestrijden, leidden niet altijd tot het gewenste resultaat en hadden soms dermate sterke neveneffecten dat ze eerder ongewenst waren. Sinds kort is steenmeel in beeld als middel dat mogelijk wel de positieve effecten maar niet de neveneffecten heeft. Kennis over de effecten van steenmeel op gedegradeerde natuur en bos is echter nog lang ...
#1J.J. VogelsH-Index: 2
#2M.J. WeijtersH-Index: 2
Last.Henk SiepelH-Index: 19
view all 7 authors...
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#1R.J. BijlsmaH-Index: 5
#2E. AgrilloH-Index: 9
Last.H.V. WinterH-Index: 1
view all 18 authors...
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#1Henk Siepel (Radboud University Nijmegen)H-Index: 19
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