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Article ; Online: Chelonian challenge: three alien species from North America are moving their reproductive boundaries in Central Europe

Tietz, Benno / Penner, Johannes / Vamberger, Melita

NeoBiota. 2023 Feb. 01, v. 82 p.1-21

2023

Abstract: AbstractBiological invasions by alien species have substantial economic impacts and are a major driver of the ongoing decline and loss of biodiversity. Through humans, the North American pond slider (Trachemys scripta) has acquired a global distribution ...

Abstract	AbstractBiological invasions by alien species have substantial economic impacts and are a major driver of the ongoing decline and loss of biodiversity. Through humans, the North American pond slider (Trachemys scripta) has acquired a global distribution over the last decades and is currently listed among the worst invasive reptile species. However, in more recent times, other freshwater chelonian species have increasingly been recorded far outside their native distribution ranges as well, not only on the same continent but also on others. Despite that, the impact of alien chelonians on their respective new ecosystems remains unclear. The long-term effects and severity of impacts of alien populations mostly depend on whether they ultimately succeed in establishing themselves. This is not entirely resolved for chelonians in Central Europe. To answer that, we investigated wild populations of three non-native chelonian species from North America in Germany (Pseudemys concinna, Graptemys pseudogeographica and Trachemys scripta) applying population genetic approaches. We revealed the successful reproduction of all three species in Germany and provide the very first record for the reproduction of P. concinna and G. pseudogeographica in a temperate continental climate zone outside their native distribution. Based on our unambiguous evidence of natural reproduction, we call for dedicated studies to verify how widespread established populations are and to investigate the existing and potential impacts of all three species in a range of ecosystems along a climatic gradient. Such data is urgently needed to revise the current risk assessments of non-native chelonians, especially in Central European countries.
Keywords	Graptemys ; Pseudemys concinna ; Trachemys scripta ; biodiversity ; continental climates ; decline ; freshwater ; geographical distribution ; introduced species ; population genetics ; reproduction ; reptiles ; risk ; Central European region ; Germany ; North America ; biodiversity loss ; biological invasion ; continental climate ; Europe ; Graptemyspseudogeographica ; Pseudemysconcinna ; Trachemysscripta
Language	English
Dates of publication	2023-0201
Size	p. 1-21.
Publishing place	Pensoft Publishers
Document type	Article ; Online
ZDB-ID	2628537-X
ISSN	1314-2488 ; 1619-0033
ISSN (online)	1314-2488
ISSN	1619-0033
DOI	10.3897/neobiota.82.87264
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Time-for-space substitution in N-mixture models for estimating population trends: a simulation-based evaluation.

Costa, Andrea / Salvidio, Sebastiano / Penner, Johannes / Basile, Marco

Scientific reports

2021 Volume 11, Issue 1, Page(s) 4581

Abstract: N-mixture models usually rely on a meta-population design, in which repeated counts of individuals in multiple sampling locations are obtained over time. The time-for-space substitution (TSS) in N-mixture models allows to estimate population abundance ... ...

Abstract	N-mixture models usually rely on a meta-population design, in which repeated counts of individuals in multiple sampling locations are obtained over time. The time-for-space substitution (TSS) in N-mixture models allows to estimate population abundance and trend of a single population, without spatial replication. This application could be of great interest in ecological studies and conservation programs; however, its reliability has only been evaluated on a single case study. Here we perform a simulation-based evaluation of this particular application of N-mixture modelling. We generated count data, under 144 simulated scenarios, from a single population surveyed several times per year and subject to different dynamics. We compared simulated abundance and trend values with TSS estimates. TSS estimates are overall in good agreement with real abundance. Trend and abundance estimation is mainly affected by detection probability and population size. After evaluating the reliability of TSS, both against real world data, and simulations, we suggest that this particular application of N-mixture model could be reliable for monitoring abundance in single populations of rare or difficult to study species, in particular in cases of species with very narrow geographic ranges, or known only for few localities.
MeSH term(s)	Animals ; Computer Simulation ; Models, Theoretical ; Population Dynamics ; Probability
Language	English
Publishing date	2021-02-25
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-021-84010-5
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Keep it simple? Dispersal abilities can explain why species range sizes differ, the case study of West African amphibians

Penner, Johannes / Mark-Oliver Rödel

Acta oecologica. 2019 Jan., v. 94

2019

Abstract: A well-known positive correlation between niche breadth and range size exists across a number of animal and plant taxa. A relatively more simple explanation, range size being connected to differing dispersal abilities, was recently presented for ... ...

Abstract	A well-known positive correlation between niche breadth and range size exists across a number of animal and plant taxa. A relatively more simple explanation, range size being connected to differing dispersal abilities, was recently presented for passerine birds. Unfortunately, respective datasets are not easily available for other taxonomic groups. We circumvented this problem by developing a simple dispersal index, incorporating niche information (body size, litter size, preferred habitats of adults and offspring, ecotype of adults) which can be collected straightforwardly for most animal taxa. We tested this dispersal index for species which are generally considered poor dispersers, amphibians. Our results from West Africa revealed a positive correlation between the dispersal index and range size (p < 0.001). Our index can easily be transferred to and tested with other taxa. Furthermore, our results suggest one possible way of integrating information on dispersal abilities in niche modelling (distribution modelling) processes which assess the impact of climate change on future species distributions.
Keywords	Passeriformes ; adults ; amphibians ; birds ; body size ; case studies ; climate change ; data collection ; ecotypes ; habitats ; litter size ; models ; progeny ; Western Africa
Language	English
Dates of publication	2019-01
Size	p. 41-46.
Publishing place	Elsevier Masson SAS
Document type	Article
ZDB-ID	1033625-4
ISSN	1146-609X
ISSN	1146-609X
DOI	10.1016/j.actao.2017.11.011
Database	NAL-Catalogue (AGRICOLA)

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Book ; Online ; Thesis: Macroecology of West African amphibians

Penner, Johannes

2014

Author's details	von Johannes Penner
Language	English
Size	Online-Ressource, Ill., graph. Darst., Kt.
Document type	Book ; Online ; Thesis
Thesis / German Habilitation thesis	Humboldt-Univ., Diss.--Berlin, 2014
Database	Special collection on veterinary medicine and general parasitology

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Book ; Online ; Thesis: Macroecology of West African amphibians

Penner, Johannes

2014

Author's details	von Johannes Penner
Language	English
Size	Online-Ressource, Ill., graph. Darst., Kt.
Document type	Book ; Online ; Thesis
Thesis / German Habilitation thesis	Humboldt-Univ., Diss.--Berlin, 2014
Database	Former special subject collection: coastal and deep sea fishing

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Article: Modelling the spatial baseline for amphibian conservation in West Africa

Penner, Johannes / Moritz Augustin / Mark-Oliver Rödel

Acta oecologica. 2019 Jan., v. 94

2019

Abstract: To answer questions such as whether the existing network of protected areas is sufficient, conservation needs data covering complete taxonomic groups and large geographic areas. However, most distributional data sets are either coarse, patchy and/or ... ...

Abstract	To answer questions such as whether the existing network of protected areas is sufficient, conservation needs data covering complete taxonomic groups and large geographic areas. However, most distributional data sets are either coarse, patchy and/or based solely on expert opinion which is often hard to verify. In addition, not all regions are equally well studied. For example sub-Saharan Africa remains comparatively under-sampled for most taxa, especially Central and Western Africa. However, these regions contain many threatened species, including a high diversity of highly threatened vertebrates - amphibians. To fill this knowledge gap, we extrapolated species occurrence records (n = 15,944) on a 30 arc-seconds grid for most known West African amphibian taxa (92%), using environmental niche modelling and employing relevant environmental parameters (climate, vegetation, elevation & distance to rivers).We provide, for the first time, a fine scale distribution map of amphibian alpha diversity for the entire West African region. Already known centres of high biodiversity were confirmed (e.g. south-western Ghana and south-eastern Côte d’Ivoire) and new ones were identified (e.g. northern Liberia and the borders of Liberia with Guinea and Sierra Leone). Diversity analyses focusing on unique amphibians, i.e. threatened, endemic and evolutionary distinct species', revealed that areas of high diversity also contained many high conservation-priority species. Herewith, we offer a comprehensive baseline for identifying those areas which are important for amphibian conservation for one of the most periled regions on the continent. Those areas of high diversity were only partly in accordance with previous analyses such as the hotspot definitions, the ecoregion analyses, or analyses of other taxa, highlighting the added new value of our approach. The most outstanding areas of amphibian diversity were only partly covered by the existing network of protected areas. Thus there is an urgent need to devise a regional conservation concept to protect West African amphibians from extinction.
Keywords	amphibians ; climate ; conservation areas ; data collection ; ecoregions ; environmental factors ; expert opinion ; extinction ; models ; rivers ; species diversity ; threatened species ; vegetation ; Cote d'Ivoire ; Ghana ; Guinea ; Liberia ; Sierra Leone
Language	English
Dates of publication	2019-01
Size	p. 31-40.
Publishing place	Elsevier Masson SAS
Document type	Article
ZDB-ID	1033625-4
ISSN	1146-609X
ISSN	1146-609X
DOI	10.1016/j.actao.2017.11.018
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Seeking serpents: Ball python trade in Benin, West Africa

Toudonou, Christian / Elwin, Angie / Penner, Johannes / Coulthard, Emma / Norrey, John / Megson, David / Rödel, Mark-Oliver / Sinsin, B. / Harrington, L. A. / Auliya, Mark / D’Cruze, Neil

Nature Conservation. 2022 Oct. 14, v. 50 p.85-114

2022

Abstract: AbstractBall pythons are traded as bushmeat, leather and belief-based medicine in West Africa, and specimens are exported in large numbers for the exotic pet trade. Here, we focused on understanding the purpose and socio-economic context of this trade ... ...

Abstract	AbstractBall pythons are traded as bushmeat, leather and belief-based medicine in West Africa, and specimens are exported in large numbers for the exotic pet trade. Here, we focused on understanding the purpose and socio-economic context of this trade in Benin through interviews with 44 actors involved in the trade of this species. We provided a snapshot of trade dynamics during a period when hunters are not predominantly actively involved in supplying eggs, neonates and gravid females for ranching and export as exotic pets. Our findings revealed that hunters and traders were largely focused on supplying the bushmeat and medicine markets in West Africa during this time. We estimated that the 21 collectors engaged in hunting in our study collectively hunt between 576 and 5,083 ball pythons from the wild each year. Collection rates reported by some suggests that they could earn more than 15,000 USD from ball python sales in bushmeat markets annually. Ball pythons hunted in Benin were mainly sold to local customers as “bushmeat” (53%) or for belief-based uses (39%) (including “fetish”, “medicinal products” and “voodoo”). However, cross-border trade with neighboring countries of Togo, Nigeria, and Ghana (or even further) also occurred. Although profitable for some, the scale of this practice, together with the widely reported decline in ball python populations in Benin, raises concern about the sustainability and long-term economic viability of this type of large-scale commercial wildlife trade in West Africa, especially as it occurs alongside extensive ranching practices to support the exotic pet trade.
Keywords	bushmeat ; decline ; economic sustainability ; exports ; leather ; medicine ; natural resources conservation ; socioeconomics ; wildlife ; Benin ; Ghana ; Nigeria ; conservation ; Pythonregius ; ranching ; snake ; traditional medicine ; wildlife trade
Language	English
Dates of publication	2022-1014
Size	p. 85-114.
Publishing place	Pensoft Publishers
Document type	Article ; Online
ZDB-ID	2667603-5
ISSN	1314-3301
ISSN	1314-3301
DOI	10.3897/natureconservation.50.86352
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: The smallest of its kind: Description of a new cryptic Amnirana species (Amphibia, Anura, Ranidae) from West African rainforests.

Griesbaum, Frederic / Jongsma, Gregory F M / Penner, Johannes / Kouamé, N'goran Germain / Doumbia, Joseph / Gonwouo, Nono L / Hillers, Annika / Glos, Julian / Blackburn, David C / Rödel, Mark-Oliver

Zootaxa

2023 Volume 5254, Issue 3, Page(s) 301–339

Abstract: The distribution of the White-Lipped Frog Amnirana albolabris was long assumed to extend from eastern-central to western African rainforests. However, recent molecular phylogenetic analyses revealed that this taxon likely represents several undescribed ... ...

Abstract	The distribution of the White-Lipped Frog Amnirana albolabris was long assumed to extend from eastern-central to western African rainforests. However, recent molecular phylogenetic analyses revealed that this taxon likely represents several undescribed species. Because the name-bearing types were collected in Gabon, the distantly related West African populations clearly represent an undescribed species that partly occurs in sympatry with Amnirana fonensis. Based on an integrative taxonomic approach, including molecular, morphological, and acoustic data, we describe the 'albolabris' populations from the Upper Guinean Forest Zone as a new species, and redescribe the morphologically similar A. fonensis on the bases of a larger series of genotyped individuals, including the first known females. We also provide new biological information for A. fonensis, including their advertisement call, habitat, and reproductive data. The new species is sister to A. fonensis and the two species differ by 5.8% in the mitochondrial 16S ribosomal RNA gene. Morphologically, males of the new species are smaller and have relatively smaller humeral glands. Females of the new species seem to have shorter legs than A. fonensis. In comparison to A. fonensis, the advertisement call of the new species has a higher dominant frequency and more pronounced frequency modulation. The two species differ in their distribution and habitat preferences, as revealed by environmental niche modelling. Whereas the new species is restricted to the Upper Guinean forests and thus is a true lowland-rainforest inhabitant, A. fonensis lives predominantly in Guinean montane forests in the forest-savanna mosaic zone.
MeSH term(s)	Male ; Female ; Animals ; Phylogeny ; Rainforest ; Ecosystem ; Forests ; Ranidae
Language	English
Publishing date	2023-03-13
Publishing country	New Zealand
Document type	Journal Article
ISSN	1175-5334
ISSN (online)	1175-5334
DOI	10.11646/zootaxa.5254.3.1
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Article ; Online: Corrigendum to "Qualitative and Quantitative Analysis of Tryptamines in the Poison of Incilius alvarius (Amphibia: Bufonidae)".

Schwelm, Hannes M / Zimmermann, Nicole / Scholl, Tobias / Penner, Johannes / Autret, Amy / Auwärter, Volker / Neukamm, Merja A

Journal of analytical toxicology

2021 Volume 46, Issue 5, Page(s) e115

Language	English
Publishing date	2021-08-30
Publishing country	England
Document type	Published Erratum
ZDB-ID	752391-9
ISSN	1945-2403 ; 0146-4760
ISSN (online)	1945-2403
ISSN	0146-4760
DOI	10.1093/jat/bkab093
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Article ; Online: Qualitative and Quantitative Analysis of Tryptamines in the Poison of Incilius alvarius (Amphibia: Bufonidae).

Schwelm, Hannes M / Zimmermann, Nicole / Scholl, Tobias / Penner, Johannes / Autret, Amy / Auwärter, Volker / Neukamm, Merja A

Journal of analytical toxicology

2021 Volume 46, Issue 5, Page(s) 540–548

Abstract: Rising numbers of psychoactive tryptamine derivatives have become available on the drug market over the last decade, making these naturally occurring or synthetically manufactured compounds highly relevant for forensic analyses. One of these compounds is ...

Abstract	Rising numbers of psychoactive tryptamine derivatives have become available on the drug market over the last decade, making these naturally occurring or synthetically manufactured compounds highly relevant for forensic analyses. One of these compounds is 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT), a constituent of the dried poison of Incilius alvarius (Colorado River toad), which has a history of ritual and/or recreational use. Still, comprehensive and validated qualitative as well as quantitative analytical data on the psychoactive components of this poison are scarce. In this study, samples of the poison of Incilius alvarius were collected from live toads in the Sonoran Desert, Arizona (USA), and analyzed with a set of complementary methods. Acetone/water (70/30, v/v) proved to be the solvent of choice for the extraction of tryptamine derivatives. Trace compounds were enriched, and overload with 5-MeO-DMT was prevented by chromatographic separation of 5-MeO-DMT prior to qualitative analyses. The method for quantification was validated. Attenuated total reflection-Fourier transform infrared spectroscopy was suitable to identify 5-MeO-DMT as the main tryptamine in samples of the poison. The combined evaluation of analytical data gained from gas chromatography-mass spectrometry (GC-MS), high-performance liquid chromatography-quadrupole time-of-flight high-resolution MS (HPLC-qToF-HRMS) and HPLC-MS-MS confirmed the presence of 5-MeO-DMT, 5-MeO-N-methyltryptamine, 5-MeO-tryptamine, 5-MeO-tryptophol, 2-(5-methoxy-1H-indol-3-yl)-acetic-acid (5-MIAA), 5-HO-N-methyltryptamine, bufotenin, DMT and tryptophan. For the first time, 5-MeO-tryptamine and two positional isomers of hydroxylated MeO-DMT were detected in the poison of Incilius alvarius. The tryptamine present in the highest concentrations was 5-MeO-DMT (mean ± SD: 410,000 ± 30,000 μg/g). Mean concentrations of 5-MeO-tryptamine (490 ± 260 μg/g), 5-HO-N-methyltryptamine (270 ± 120 μg/g), bufotenin (2,800 ± 1,900 μg/g) and DMT (250 ± 80 μg/g) showed a relatively high variability between individual samples. The comprehensive analytical reference data of Incilius alvarius poison presented here might prove useful for forensic chemists.
MeSH term(s)	Animals ; Bufonidae ; Bufotenin ; Methoxydimethyltryptamines ; Poisons ; Tryptamines
Chemical Substances	Methoxydimethyltryptamines ; Poisons ; Tryptamines ; Bufotenin (0A31347TZK)
Language	English
Publishing date	2021-03-13
Publishing country	England
Document type	Journal Article
ZDB-ID	752391-9
ISSN	1945-2403 ; 0146-4760
ISSN (online)	1945-2403
ISSN	0146-4760
DOI	10.1093/jat/bkab038
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