Pim Lemmers

Pim Lemmers
Natuurbalans

PhD, Radboud Universiy, Nijmegen

About

67
Publications
20,309
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155
Citations
Introduction
My areas of interest are fish, amphibians, crayfish and mammals (in particular hazel dormouse).
Additional affiliations
May 2024 - present
Radboud University
Position
  • Researcher
Education
April 2017 - May 2024
Radboud University
Field of study
  • Invasion Biology
July 2014 - July 2016
September 2010 - July 2014

Publications

Publications (67)
Article
The Eurasian Water Shrew (Neomys fodiens) is one of the largest shrew (Soricidae) species in Eurasia. In Western Europe, this semiaquatic species often occurs in riparian and marshland habitats that have a high degree of naturalness, but is being threatened by habitat degradation and other anthropogenic factors. The species mostly occurs in low abu...
Technical Report
Full-text available
Invasieve uitheemse soorten vormen een ernstige bedreiging voor biodiversiteit en economie. Aquatische ecosystemen zijn bijzonder gevoelig voor deze invasies, hoofdzakelijk door menselijke activiteiten komt. In Nederland zijn sinds de jaren vijftig verschillende soorten rivierkreeften geïntroduceerd, waaronder de Californische rivierkreeft (Pacifas...
Article
Full-text available
Omwille van natuurherstel en waterbeheersing zijn veel beeklopen in hun oorspronkelijke staat teruggebracht. De waterspitsmuis, een zeldzame en kenmerkende predator van ongewervelden en gewervelden die thuishoort in natuurlijke beekdalen, kan profiteren van de herstelwerkzaamheden. Doordat waterspitsmuizen in lage dichtheden voorkomen en een verbor...
Article
Full-text available
The Hazel dormouse is one of the rarest mammals in the Netherlands. Since the 1950s, its habitats have become fragmented and degraded. Isolated populations have suffered genetic deterioration. To mitigate this, action plans were developed and implemented between 1997 and 2021, resulting in habitat restoration. This study focused on evaluating these...
Technical Report
Full-text available
Kieuwpootkreeften zijn de oerbeesten van de Nederlandse fauna. Ze behoren tot een primitieve groep kreeftachtigen. Vijf soorten kieuwpootkreeften zijn uit Nederland bekend: oranje-blauw zwemmend geraamte (Eubranchipus grubii), rood-groen zwemmend geraamte (Chirocephalus diaphanus), humus-kieuwpootkreeft (Lepidurus apus), leem­kieuwpootkreeft (Triop...
Thesis
Full-text available
Introductions of organisms outside their natural range are increasingly taking place due to the increasing globalisation of human activities. The establishment of invasive alien species can have far-reaching adverse ecological and socio-economic consequences with high societal costs (Chapter 1). Not every introduced (alien) species is invasive. Thi...
Technical Report
Full-text available
Inleiding en achtergrond Van nature komt de Grote modderkruiper voor in ontwikkelde (kwel)moerassen, sloten en traag stromende beeklopen en –meanders. Door de natuurlijke dynamiek zijn dergelijke habitats onderhevig aan extreme omstandigheden, vooral wat betreft waterpeil en -temperatuur. Vaak is Grote modderkruiper één van de weinige vissen die in...
Article
Full-text available
Co-occurring and morphologically similar species have adapted to differential niches to minimize competition. An invasive alien species can occupy an ‘empty niche’ in introduced ranges. Alternatively, the invader may occupy an overlapping niche and compete with native species to a certain degree. In a Western European lowland brook with high nutrie...
Article
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Small mammals are potential bio-indicators of various ecosystems and their populations are often studied. However, many small mammal species are difficult to detect due to their small size and elusive behaviour. Camera trapping and live trapping are commonly employed survey techniques, but they both have their limitations. Recently developed techni...
Article
Full-text available
The river Roer is one of the most important spawning rivers for Atlantic salmon (Salmo salar) in the Netherlands. The effectiveness of a fish passage in the town of Roermond was called into question when underwater cameras revealed that many attempts at upstream migration by Atlantic salmon were unsuccessful. It was hypothesised that the underwater...
Technical Report
Full-text available
Horizon scan for new invasive alien species in the Netherlands, update 2022 Summary Prevention is an important part of the European regulation (1143/2014) aimed at combatting invasive alien species. Early action through prevention and early detection and elimination of small populations offers the greatest chance of preventing damage from invasion...
Article
Full-text available
The hazel dormouse is predominantly an arboreal species that moves down to the ground to hibernate in the autumn in temperate parts of its distributional ranges at locations not yet well understood. The main objective of this study is to test whether environmental characteristics surrounding hazel dormouse hibernacula can be identified using high-r...
Article
Full-text available
Land habitat use of Yellow-bellied toads (Bombina variegata), including hibernacula, determined using telemetry. Implications for conservation assessed established by year-round research The most north-western part of the distribution range of the European Yellow-bellied toad (Bombina variegata) extends into southern Limburg in the Netherlands. Fr...
Article
Full-text available
The Serotine (Eptesicus serotinus) is one of the larger bat species in the Netherlands, which almost exclusively roosts in buildings. Unlike most other European bat species, Serotines are rarely found during hibernation, so no reliable monitoring data exists for the Netherlands. Nevertheless, this species is declining, ossibly due to the lack of k...
Article
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The Rhine sculpin (Cottus rhenanus) is a benthic rheophilic fish species that is endemic to tributaries of the rivers Rhine and Meuse in North-western Europe. Little is known about its occurrence and individuals density in relation to habitat characteristics. A core population of C. rhenanus occurs in the River Geul in the Netherlands. Since the la...
Article
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Spawning brown trout in the River Geul: why does it go wrong? The River Geul is one of the few strongholds of brown trout (Salmo trutta fario) in the Netherlands. During the spawning season, spawning activity has been observed in the River Geul for many years, but frequent natural recruitment fails to occur. In order to increase knowledge of key fa...
Article
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The impact of activities of the Beaver (Castor fiber) on the sustainable conservation of populations of Brook lamprey (Lampetra planeri) and Golden-ringed dragonfly (Cordulegaster boltonii) in the Roode beek brook (Meinweg area) The Roode beek brook in the province of Limburg is known as one of the most natural brooks in the Netherlands. In 2012,...
Article
Full-text available
Invasive alien crayfish species pose major ecological and hydrological risks globally. The red swamp crayfish (Procambarus clarkii) is one of the most widespread crayfish species worldwide. Its impacts arise from burrowing activities and lead to mobilization of soil nutrients, water safety risks by instability of dikes and erosion of banks. Increas...
Article
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For most if not all European herpetofauna, range-wide mtDNA phylogeographies have been published. This facilitates establishing the provenance of introduced populations. However, precision is contingent on the spatial genetic structure across the range of the taxon under study and, in particular, from where within that range the introduction was so...
Article
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In Nederland komt de vroedmeesterpad van oorsprong alleen voor in het Zuid-Limburgse heuvelland. Veel populaties zijn hier echter sterk gefragmenteerd en geïsoleerd, met veelal lage aantallen geslachtsrijpe dieren. Dit kan mogelijk leiden tot genetische verarming en uiteindelijk invloed hebben op de duurzame staat van instandhouding van de soort in...
Article
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De hazelmuis behoort tot de familie van de slaapmuizen. Slaapmuizen gaan in het najaar in winterslaap om pas weer in het voorjaar te verschijnen. Waar de Nederlandse hazelmuizen tijdens de winter verblijven, en welke omgevingsfactoren dit bepalen, was nog onbekend. Om dit inzichtelijk te maken zijn 24 hazelmuizen van een zendertje voorzien en gevol...
Technical Report
Full-text available
De laatvlieger (Eptesicus serotinus) is een van de grotere vleermuissoorten in Nederland en maakt nagenoeg uitsluitend gebruik van gebouwen als verblijfplaats. In de zomer bewonen ze vaak spouwmuren, verblijven ze onder dakruimten en, in mindere mate, ook op (kerk)zolders. Vleermuizen zijn over het algemeen plaatstrouw aan hun verblijfplaatsen. Dez...
Technical Report
Full-text available
Transmitters reveal residence and landscape use of least weasels Over the past century, the least weasel has strongly declined in the Netherlands. This species is protected in approximately half of all Dutch provinces, which, in addition to the protection of the individual, also involves habitat protection. However, much is still unknown about the...
Conference Paper
Full-text available
The Hazel Dormouse is predominantly an arboreal species that moves down to the ground to hibernate in the autumn in temperate parts of its distributional ranges at locations not yet well understood. In this study, we tested whether environmental characteristics surrounding Hazel Dormouse hibernacula can be identified using high-resolution remote se...
Article
Full-text available
The Hazel Dormouse is predominantly an arboreal species that moves down to the ground to hibernate in the autumn in temperate parts of its distributional ranges at locations not yet well understood. In this study, we tested whether environmental characteristics surrounding Hazel Dormouse hibernacula can be identified using high-resolution remote se...
Technical Report
Full-text available
De vestiging van de bever in de Roode beek in het Meinweggebied heeft invloed op de directe omgeving en leidt tot wijzigingen in het stromingspatroon van het oppervlaktewater en op sedimentatie en erosieprocessen in de beek. Mogelijk treden lokaal ook veranderingen op in kwelstroompjes en het grondwater. Het was niet bekend welke invloed de activi...
Technical Report
Full-text available
The hazel dormouse (Muscardinus avellanarius) is a very rare species in the Netherlands and is protected both in the Netherlands and at European level. The species is listed as 'Endangered' on the national Red List and has declined in distribution by 46% since 1950. Its current distribution area is confined to the southernmost part of the Netherlan...
Article
Full-text available
The Balkans represent one of the regions with the highest bat diversity in Europe. Thus far, 31 bat species have been recorded in Bosnia and Herzegovina (BiH). The bat fauna of this Balkan country is one of the least studied in Europe. In order to reduce this knowledge gap, bat research was carried out during a ten-day inventory in the vicinity of...
Article
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GENETIC STUDY OF COMMON MIDWIFE TOAD (ALYTES OBSTETRICANS) IN LIMBURG Genetic diversity, vitality and authenticity of populations The Common midwife toad (Alytes obstetricans) occurs naturally in the Netherlands only in the province of Limburg. Here, populations are scattered and often vulnerable due to the low numbers, fragile connections and hig...
Article
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Risks and Potential Management of Invasive Crayfish Since the 1950s, nine alien crayfish species (7 from North America, 1 from Southeast Europe, 1 from East Europe/Asia) have been introduced in the Netherlands. Seven of these species have well-established populations. Their impact on biodiversity and ecosystem functioning mainly results from diseas...
Article
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The first marbled crayfish in the Netherlands was recorded in 2004. The next was observed a decade later, in 2014. Since then the number of observations has increased significantly up to 14 sites in 2020, spread all over the country. The marbled crayfish became established in at least four sites of which one has been eliminated in 2020. Animals are...
Article
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De opmars van exotische rivierkreeften lijkt niet te stoppen. In nagenoeg alle watertypes kun je ze tegenwoordig tegenkomen, vaak in (zeer) grote aantallen. De uitheemse dieren vormen niet alleen een gevaar voor de stabiliteit van oevers en dijken, maar bedreigen ook natuurwaarden. Valt dit kreeftenprobleem nog te beheren en te beheersen?
Article
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In terms of crayfish, the province of Limburg is a province poor in species by Dutch standards. Until 2020, only three invasive alien crayfish species were known. However, Marbled crayfish (Procambarus virginalis) were found at two isolated locations near Venlo within a short period of time in the spring of 2020. The origin and release of one of th...
Article
Full-text available
Since the 1950s, nine alien crayfish species have been introduced in the Rhine-Meuse river delta. Seven species originate from North America, one from Southeast Europe and one from East Europe/Asia. Currently, at least seven species have well-established populations. Five species are listed as invasive alien species (IAS) of European Union (EU) con...
Article
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Sightings of the Spirlin (Alburnoides bipunctatus) have always been very rare in the Netherlands. Most historical records of these sightings are dated from 1919-1931 in the Jeker River. Due to poor water quality and habitat deterioration the species disappeared in the Netherlands. However, in 1995 the species was rediscovered in the Geul River and...
Technical Report
Dit onderzoek laat zien dat de inheemse Nederlandse vroedmeesterpadpopulaties genetisch uniek zijn, specifiek voor dit deel van het verspreidingsareaal binnen Europa. De genetische diversiteit van de inheemse Nederlandse vroedmeesterpadpopulaties is over het algemeen goed en vergelijkbaar met die van andere populaties in de noordwestelijke rand van...
Article
Full-text available
Alien fish are important invaders, with a high number of species introduced outside their native range worldwide. Pathogens associated with these invaders often remain undetected, while they potentially have detrimental effects on native fish species. The topmouth gudgeon (Pseudorasbora parva), a cyprinid fish, originates from Asia and is globally...
Technical Report
Full-text available
Migratiepatronen van rheofiele vissoorten in het stroomgebied van de Geul, inzichtelijk gemaakt met behulp van RFID-technologie.
Article
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The Asian cyprinid Pseudorasbora parva is considered to be a major threat to native fish communities and listed as an invasive alien species of European Union concern. Our study aims to gain evidence-based knowledge on the impact of both P. parva and its parasite Sphaerothecum destruens on native fish populations by analysing fish assemblages and b...
Article
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De laatvlieger (Eptesicus serotinus) is een vrij algemene vleermuissoort in Nederland. De soort gaat echter wel achteruit en is zelfs op de Rode Lijst geplaatst. Tegelijkertijd is er veel nog onbekend van de laatvlieger, met name over de activiteit en verblijfplaatsen in najaar en winter. Dat maakt het moeilijk de soort adequaat te beschermen. In d...
Article
Full-text available
Door omvangrijke graafactiviteiten vormt een aantal invasieve uitheemse rivierkreeftensoorten risico's voor de waterveiligheid, oeverstabiliteit en sedimenthuishouding. Vanwege snelle en wijde verspreiding wordt uitroeiing van de uitheemse rivierkreeftensoorten niet meer haalbaar geacht. Het aanleggen van natuurlijke oevers zou een kansrijk handeli...
Article
Full-text available
The first record of the Common Pincer Grasshopper Calliptamus italicus in the Netherlands (Orthoptera: Acrididae). On 14 August 2019, a long-winged female Calliptamus italicus was found in floodplains along the Meuse River near Bunde (province of Limburg). This is the first finding of this species for the Netherlands. The habitat was composed of...
Book
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De aandacht voor uitheemse rivierkreeften neemt de laatste jaren flink toe. Verschillende soorten zijn in 2016 toegevoegd aan de Europese Unielijst (EU-exotenverordening 1143/2014) van schadelijke exoten, wat geleid heeft tot aanpassingen in de Nederlandse natuur- en visserijwetgeving. Een drietal water- en natuurbeheerders hebben onlangs een liter...
Article
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The Eyserbeek is one of the larger tributaries of the river Geul, with abiotic conditions characteristic of hill streams. These conditions include natural meandering, fast-flowing water and a high diversity of flow and substratum types. The fish community largely consists of rheophilic species that are adapted to these typical conditions. The Eyser...
Article
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Invasieve uitheemse rivierkreeften veroorzaken signifi cante ecologische en economische effecten maar vormen ook risico’s voor de waterveiligheid en mogelijk voor de volksgezondheid. Het aantal uitheemse rivierkreeftsoorten in de provincie Limburg is nog laag maar zal de komende jaren naar verwachting toenemen. De inheemse Europese rivierkreeft (As...
Article
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In het concept-beheerplan Natura 2000 Weerter- en Budelerbergen & Ringselven (Provincie Limburg, 2009) zijn de destijds bekende verspreidingsgegevens van Kamsalamander (Triturus cristatus) verwerkt als stippenkaart. In het definitieve Natura 2000-beheerplan dienen deze kaarten op basis van actuele gegevens te worden omgezet naar een leefgebiedenkaa...
Article
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De opmars van invasieve grondelsoorten uit de Donau heeft in de Grensmaas geleid tot een forse afname van de inheemse rivierdonderpad (Cottus perifretum). In het sstroomgebied van de Geul bestaat het gevaar dat de zeldzame beekdonderpad (Cottus rhenanus) hetzelfde lot ondergaat wanneer de grondels via de Grensmaas de Geul koloniseren. Tijdens eerde...
Technical Report
Full-text available
Achtergrond Binnen het beheergebied van waterschap Rivierenland komen zes invasieve uitheemse rivierkreeftensoorten voor, die in Nederland zijn terechtgekomen via aquariumhandel, consumptiehandel of als vislokaas, en vervolgens in de vrije natuur uitgezet. Vijf van deze kreeftensoorten staan vermeld op Unielijst. Voor soorten die zijn vermeld op de...
Article
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Tijdens de monitoring van een beverdam in de Roode Beek op de Meinweg werd niet alleen de aanwezigheid van een Bever (Castor fiber), maar ook die van een ander watergebonden zoogdier vastgesteld, namelijk een Otter. Het betreft de eerste bevestigde waarneming van een Otter in Limburg na ruim 25 jaar afwezigheid. Wat kan deze waarneming betekenen vo...
Article
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Uitheemse kreeften kunnen een enorme ecologische schade toebrengen door de hoge dichtheden die ze bereiken. De Californische rivierkreeft, een van de zes invasieve kreeftensoorten in ons land, is een bijzonder opportunistische alleseter die momenteel in Overijssel en Noord- Brabant voorkomt. In Noord-Brabant is in een pilot geprobeerd om alle kreef...
Article
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In 2015, a fishway was constructed at the Volmolen water mill in the Haelense Beek to enable fish migration. The fishway is 59 m long and spans a height of 2.15 m by means of 48 compartments. To test its ecological functionality, two radio-frequency identification (RFID) antennae were placed; one downstream and one upstream. Seventy individuals, di...
Article
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The Asian weather loach (Misgurnus anguillicaudatus) was found for the first time in the Netherlands in the Tungelroysebeek brook in 2012. The species is non-native to Europe and is currently found in several countries. A project to eliminate the loach from the brook basin was initiated in 2013. Between 2012 and 2016, 763 loaches where caught by me...
Article
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Some introduced passerine species can cause considerable damage to arable crops in New Zealand. These crops are usually surrounded by hedgerows and, in Canterbury, these are commonly Monterey pine (Pinus radiata) and macrocarpa (Cupressus macrocarpa). The present study aimed to determine whether bird abundance and species composition differed among...

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