19 Works

Allometric modelling of plant biomass from drone-acquired photographs: drone images, ground control marker coordinates and biomass data from 36 sites, 2016-2020

A. Cunliffe, K. Anderson, F. Boschetti, H. Graham, R. Brazier, I. Myers-Smith, T. Astor, M. Boer, L. Calvo, P. Clark, M. Cramer, M. Encinas-Lara, S. Escarzaga, J. Fernández-Guisuraga, A. Fisher, K. Gdulová, B. Gillespie, A. Griebel, N. Hanan, M. Hanggito, S. Haselberger, C. Havrilla, W. Ji, J. Karl, M. Kirchhoff … & R. Wojcikiewicz
This dataset contains RGB photographs acquired from drone surveys. There are 741 harvest plots from 38 surveys at 36 sites around the world. Each site was approximately 1 ha in area. Included with the photographic images are the coordinates of ground control markers, biomass, taxonomic and location data for harvest plots and ancillary metadata. The observations can be used to obtain allometric size-biomass models. This work was supported by the Natural Environment Research Council award...

Data from: Cityscape genetics: structural vs. functional connectivity of an urban lizard population

Joscha Beninde, Stephan Feldmeier, Maike Werner, Daniel Peroverde, Ulrich Schulte, Axel Hochkirch & Michael Veith
Functional connectivity is essential for the long-term persistence of populations. However, many studies assess connectivity with a focus on structural connectivity only. Cityscapes, namely urban landscapes, are particularly dynamic and include numerous potential anthropogenic barriers to animal movements, such as roads, traffic or buildings. To assess and compare structural connectivity of habitats and functional connectivity of gene flow of an urban lizard, we here combined species distribution models (SDMs) with an individual-based landscape genetic optimization...

Data from: Wide prevalence of hybridization in two sympatric grasshopper species may be shaped by their relative abundances

Katja Rohde, Yvonne Hau, Jessica Weyer & Axel Hochkirch
Background: Hybridization between species is of conservation concern as it might threaten the genetic integrity of species. Anthropogenic factors can alter hybridization dynamics by introducing new potentially hybridizing species or by diminishing barriers to hybridization. This may even affect sympatric species pairs through environmental change, which so far has received little attention. We studied hybridization prevalence and the underlying behavioral mechanisms in two sympatric grasshopper species, a rare specialist (Chorthippus montanus) and a common generalist...

The Bug in a teacup – Monitoring arthropod-plant associations with environmental DNA from dried plant material

Henrik Krehenwinkel
Environmental DNA analysis has revolutionized the field of biomonitoring in the past years. Various sources have been shown to contain eDNA of diverse organisms, for example water, soil, gut content and plant surfaces. Here we show that dried plant material is a highly promising source for arthropod community eDNA. We designed a metabarcoding assay to enrich diverse arthropod communities, while preventing amplification of plant DNA. Using this assay, we analyzed various commercially produced teas and...

Broad-scale patterns of geographic avoidance between species emerge in the absence of fine-scale mechanisms of coexistence

Roberto Novella-Fernandez, Javier Juste, Carlos Ibanez, Hugo Rebelo, Danilo Russo, Antton Alberdi, Andreas Kiefer, Laura Graham, Patrick Doncaster, Hynek Paul & Orly Razgour
Aim: The need to forecast range shifts under future climate change has motivated an increasing interest in better understanding the role of biotic interactions in driving diversity patterns. The contribution of biotic interactions to shaping broad-scale species distributions is however, still debated, partly due to the difficulty of detecting their effects. We aim to test whether spatial exclusion between potentially competing species can be detected at the species range scale, and whether this pattern relates...

Data from: Range expansion and retraction along a moving contact zone has no effect on the genetic diversity of two passerine birds

Jan O. Engler, Jean Secondi, Deborah A. Dawson, Ortwin Elle & Axel Hochkirch
Disentangling the factors shaping species distributions remains a central goal in biogeography, ecology and evolutionary biology. The extrinsic pressures that may facilitate range shifts, such as climatic factors or biotic interactions are well known. However, in contrast, the possible intrinsic factors are manifold and hard to generalize across taxa. Recently, several theoretical studies have investigated the consequences of moving range borders on genetic diversity. However, empirical studies that support or refute these theoretical predictions are...

An amplicon sequencing protocol for attacker identification from DNA traces left on artificial prey

Henrik Krehenwinkel, Daniela Rößler, Michael Veith, Stefan Lötters, Charlene Peters, Michele Fugmann & Sven Künzel
Clay model studies are a popular tool to identify predator-prey interactions that are challenging to observe directly in the field. But despite its wide use, the method’s applicability is limited by its low taxonomic resolution. Attack marks on clay models are usually identified visually, which only allows classification into higher taxonomic levels of predators. Thus, the method is often biased, lacks proof and, above all, standardization. Here, we tested whether precise identification of attackers can...

Reduced host-plant specialization is associated with the rapid range expansion of a Mediterranean butterfly

Anika Neu, Stefan Lötters, Linda Nörenberg, Martin Wiemers & Klaus Fischer
Aim: Species ranges are highly dynamic, shifting in space and time as a result of complex ecological and evolutionary processes. Disentangling the relative contribution of both processes is challenging but of primary importance for forecasting species distributions under climate change. Here, we use the spectacular range expansion (ca. 1,000 km poleward shift within 10 years) of the butterfly Pieris mannii to unravel the factors underlying range dynamics, specifically the role of (i) niche evolution (changes...

Are you what you eat? A highly transient and prey-influenced gut microbiome in the grey house spider Badumna longinqua

Henrik Krehenwinkel, Sophia Tsau, Susan Kennedy & Rosemary Gillespie
Stable core microbial communities have been described in numerous animal species and are commonly associated with fitness benefits for their hosts. Recent research, however, highlights examples of species whose microbiota are transient and environmentally derived. Here, we test the effect of diet on gut microbial community assembly in the spider Badumna longinqua. Using 16S rRNA gene amplicon sequencing combined with quantitative PCR, we analyze diversity and abundance of the spider’s gut microbes, and simultaneously characterize...

Data from: Expanding the understanding of local community assembly in adaptive radiations

Katharina C. Wollenberg, Michael Veith & Stefan Lötters
Communities are thought to be assembled by two types of filters: by the environment relating to the fundamental niche and by biotic interactions relating to the realized niche. Both filters include parameters related to functional traits, and their variation along environmental gradients. Here we infer the general importance of environmental filtering of a functional trait determining local community assembly within insular adaptive radiations on the example of Caribbean Anolis lizards. We constructed maps for the...

Semi‐quantitative metabarcoding reveals how climate shapes arthropod community assembly along elevation gradients on Hawaii Island

Jun Ying Lim, Jairo Patiño, Suzuki Noriyuki, Henrik Krehenwinkel, Luis Simmari, Rosemary Gillespie, Luis Cayetano & Rosemary G. Gillespie
Spatial variation in climatic conditions along elevation gradients provides an important backdrop by which communities assemble and diversify. Lowland habitats tend to be connected through time, whereas highlands can be continuously or periodically isolated, conditions that have been hypothesized to promote high levels of species endemism. This tendency is expected to be accentuated among taxa that show niche conservatism within a given climatic envelope. While species distribution modeling approaches have allowed extensive exploration of niche...

Data from: Species distribution models contribute to determine the effect of climate and interspecific interactions in moving hybrid zones

Jan O. Engler, Dennis Rödder, Ortwin Elle, Axel Hochkirch & Jean Secondi
Climate is a major factor delimiting species’ distributions. However, biotic interactions may also be prominent in shaping geographical ranges, especially for parapatric species forming hybrid zones. Determining the relative effect of each factor and their interaction of the contact zone location has been difficult due to the lack of broad scale environmental data. Recent developments in species distribution modelling (SDM) now allow disentangling the relative contributions of climate and species’ interactions in hybrid zones and...

Data from: Historical invasion records can be misleading: genetic evidence for multiple introductions of invasive raccoons (Procyon lotor) in Germany

Marietta L. Fischer, Axel Hochkirch, Mike Heddergott, Christoph Schulze, Helena E. Anheyer-Behmenburg, Johannes Lang, Frank-Uwe Michler, Ulf Hohmann, Hermann Ansorge, Lothar Hoffmann, Roland Klein & Alain C. Frantz
Biological invasions provide excellent study systems to understand evolutionary, genetic and ecological processes during range expansions. There is strong evidence for positive effects of high propagule pressure and the associated higher genetic diversity on invasion success, but some species have become invasive despite small founder numbers. The raccoon (Procyon lotor) is often considered as a typical example for such a successful invasion resulting from a small number of founders. The species’ largest non-native population in...

Data from: Climatic effects on population declines of a rare wetland species and the role of spatial and temporal isolation as barriers to hybridization

Katja Rohde, Yvonne Hau, Nicole Kranz, Jasmin Weinberger, Ortwin Elle & Axel Hochkirch
Climate change and climatic extremes may affect species directly or indirectly. While direct climatic effects have been intensively studied, indirect effects, such as increasing hybridization risk, are poorly understood. The goal of our study was to analyse the impact of climate on population dynamics of a rare habitat specialist, Chorthippus montanus, as well as the fine-scale spatial overlap with a sympatric habitat generalist, Chorthippus parallelus and the dispersion of hybrids. We were particularly interested in...

Data from: Rapid genetic assimilation of native wall lizard populations (Podarcis muralis) through extensive hybridization with introduced lineages

Ulrich Schulte, Michael Veith & Axel Hochkirch
The Common Wall Lizard (Podarcis muralis) has established more than 150 non-native populations in Central Europe, stemming from eight geographically distinct evolutionary lineages. While the majority of these introduced populations are found outside the native range, some of these populations also exist at the northern range margin in south-western Germany. In order to a) infer the level of hybridization in contact zones of alien and native lineages and b) compare the genetic diversity among purebred...

Data from: Population signatures of large-scale, long-term disjunction and small-scale, short-term habitat fragmentation in an Afromontane forest bird

Jan Christian Habel, Luc Lens, Martin Husemann, Ronald K. Mulwa, Luca Borghesio, Franz Gassert, Dennis Rödder & Werner Ulrich
The Eastern Afromontane cloud forests occur as geographically distinct mountain exclaves. The conditions of these forests range from large to small and from fairly intact to strongly degraded. For this study, we sampled individuals of the forest bird species, the Montane White-eye Zosterops poliogaster from 16 sites and four mountain archipelagos. We analysed 12 polymorphic microsatellites and three phenotypic traits, and calculated Species Distribution Models (SDMs) to project past distributions and predict potential future range...

Data from: Admixture of hybrid swarms of native and introduced lizards in cities is determined by the cityscape structure and invasion history

Joscha Beninde, Stephan Feldmeier, Michael Veith & Axel Hochkirch
Introductions of non-native lineages increase opportunities for hybridization. Non-native lineages of the common wall lizard, Podarcis muralis, are frequently introduced in cities where they hybridize with native populations. We aimed at unravelling the invasion history and admixture of native and non-native wall lizards in four German cities using citywide, comprehensive sampling. We barcoded and genotyped 826 lizards and tested if gene flow in populations composed of admixed native and introduced lineages is facilitated by similar...

Rapid and cost-effective generation of single specimen multilocus barcoding data from whole arthropod communities by multiple levels of multiplexing

Henrik Krehenwinkel
In light of the current biodiversity crisis, molecular barcoding has developed into an irreplaceable tool. Barcoding has been considerably simplified by developments in high throughput sequencing technology, but still can be prohibitively expensive and laborious when community samples of thousands of specimens need to be processed. Here, we outline an Illumina amplicon sequencing approach to generate multilocus data from large collections of arthropods. We reduce cost and effort up to 50-fold, by combining multiplex PCRs...

ddRAD of Hawaiian Ariamnes spiders

Ellie Armstrong, Benoît Perez-Lamarque, Ke Bi, Leontine Becking, Jun Lim, Tyler Linderoth, Rosemary Gillespie & Henrik Krehenwinkel
The diversification of a host organism can be influenced by both the external environment and its assemblage of microbes. Here, we use a young lineage of spiders, coupled with a chronologically arranged series of volcanic mountains, to determine the evolutionary history of a host and its associated microbial communities, altogether forming the “holobiont”. Using the stick spider Ariamnes waikula (Araneae, Theridiidae) on the island of Hawaiʻi, and outgroup taxa on older islands, we tested whether...

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