13 Works

Data from: Tracking population genetic signatures of local extinction with herbarium specimens

Christoph Rosche, Annnett Baasch, Karen Runge, Philipp Brade, Sabrina Träger, Christian Parisod & Isabell Hensen
Background and Aims Habitat degradation and landscape fragmentation dramatically lower population sizes of rare plant species. Decreasing population sizes may, in turn, negatively affect genetic diversity and reproductive fitness which can ultimately lead to local extinction of populations. Although such extinction vortex dynamics have been postulated in theory and modelling for decades, empirical evidence from local extinctions of plant populations is scarce. In particular, comparisons between current vs. historical genetic diversity and differentiation are lacking...

How does variation in total and relative abundance contribute to gradients of species diversity?

Thore Engel
Patterns of biodiversity provide insights into the processes that shape biological communities around the world. Variation in species diversity along biogeographical or ecological gradients, such as latitude or precipitation, can be attributed to variation in different components of biodiversity: changes in the total abundance (i.e. more-individual effects) and changes in the regional species abundance distribution (SAD). Rarefaction curves can provide a tool to partition these sources of variation on diversity, but first must be converted...

Dataset for: Interactive effects of tree species composition and water availability on growth and direct and indirect defences in Quercus ilex

Andrea Galmán, Carla Vázquez-González, Gregory Röder & Bastien Castagneyrol
Plant diversity has often been reported to decrease insect herbivory in plants. Of the numerous mechanisms that have been proposed to explain this phenomenon, how plant diversity influences plant defences via effects on growth has received little attention. In addition, plant diversity effects may be contingent on abiotic conditions (e.g., resource and water availability). Here, we used a long-term experiment to explore the interactive effects of tree species composition and water availability on growth, direct...

Temporal trends in the spatial bias of species occurrence records

Diana Bowler, Corey Callaghan, Netra Bhandari, Klaus Henle, Benjamin Barth, Christian Koppitz, Reinhard Klenke, Marten Winter, Florian Jansen, Helge Bruelheide & Aletta Bonn
Large-scale biodiversity databases have great potential for quantifying long-term trends of species, but they also bring many methodological challenges. Spatial bias of species occurrence records is well recognized. Yet, the dynamic nature of this spatial bias - how spatial bias has changed over time - has been largely overlooked. We examined the spatial sampling bias of species occurrence records within multiple biodiversity databases in Germany and tested whether spatial bias in relation to land cover...

Data from: Harvesting has variable effects on demographic rates and population growth across three dry forest tree species

Neeraja Venkataraman
Understanding how anthropogenic activities, such as harvesting, influence plant populations is important to quantify sustainable practices that conserve species of socioeconomic importance. There is limited knowledge on how harvesting of branches and non-timber forest products affect populations of trees in the dry tropics. We measure demographic vital rates of three dry tropical tree species in the presence and absence of harvesting and apply integral projection models to quantify population growth rates, which represent the mean...

Data from: The skeletal taphonomy of anurans from the Eocene Geiseltal Konservat-Lagerstätte, Germany: insights into the controls on fossil anuran preservation

Daniel Falk, Oliver Wings & Maria McNamara
The Geiseltal biota is a lacustrine-hosted Konservat-Lagerstätte from the Eocene of central Germany. Despite its rich fauna and flora that is represented by at least 50,000 fossil vertebrates, insects and other invertebrates, plants and trace fossils, the taphonomy of the biota is still poorly understood. In particular, the anurans have not been the focus of taphonomic investigation. Here, we analysed the skeletal taphonomy of 168 anurans from Geiseltal and scored each specimen for orientation, completeness...

Automatisierte Identifikation und Lemmatisierung historischer Berufsbezeichnungen in deutschsprachigen Datenbeständen

Jan Michael Goldberg & Katrin Moeller
Berufsangaben kommen in vielen historischen Quellen vor. Für eine Vielzahl von Forschungsgebieten ist nicht nur eine Standardisierung, sondern vor allem Klassifikation eine zentrale Voraussetzung zur Analyse. Dabei wird die Zuordnung von Schreibvarianten zu bereits definierten Gattungsnamen von Berufen in diesem Artikel als Lemmatisierung beziehungsweise Normierung bezeichnet, die Zuordnung der normalisierten Schreibweise zu einem Ordnungssystem als Klassifikation. Um hierbei manuellen Aufwand zu verringern, wird ein Algorithmus zur automatisierten Lemmatisierung historischer, deutschsprachiger Berufsangaben entwickelt. Das beste Ergebnis...

Experimental cross species transmission of a major viral pathogen in bees is predominantly from honeybees to bumblebees

Anja Tehel, Tabea Streicher, Simon Tragust & Rober J. Paxton
Cross-species transmission of a pathogen from a reservoir to a recipient host species, spillover, can have major impacts on biodiversity, domestic species and human health. Deformed wing virus (DWV) is a panzootic RNA virus in honeybees that is causal in their elevated colony losses, and several correlative field studies have suggested spillover of DWV from managed honeybees to wild bee species such as bumblebees. Yet unequivocal demonstration of DWV spillover is lacking whilst spillback, the...

Reproductive ecology of Drosophila obscura: A cold adapted species

Berta Canal, Aileen Seipelt & Claudia Fricke
The study of insect reproductive ecology is essential to determine species distributions and fate under changing environments. Species adapted to harsh environments are good examples to investigate the reproductive mechanisms that allow them to cope with the challenging conditions. We here focus on studying for the first time the reproductive ecology of a cold-adapted D. obscura strain collected in Finland (subarctic climate region). We tested several reproductive traits such as fertility and fecundity to observe...

Demographic rates and stature of tree species in 13 sub-tropical forests: annual growth, annual survival, annual recruitment >( 1 cm dbh), stature (max dbh)

Stephan Kambach, Richard Condit, Salomón Aguilar, Helge Bruelheide, Sarayudh Bunyavejchewin, Chia-Hao Chang-Yang, Yu-Yun Chen, George Chuyong, Stuart J. Davies, Sisira Ediriweera, Corneille E. N. Ewango, Edwino S. Fernando, Nimal Gunatilleke, Savitri Gunatilleke, Stephen P Hubbell, Akira Itoh, David Kenfack, Somboon Kiratiprayoon, Yi-Ching Lin, Jean-Remy Makana, Mohizah Bt. Mohamad, Nantachai Pongpattananurak, Rolando Pérez, Lillian Jennifer V. Rodriguez, I-Fang Sun … & Nadja Rüger
Organisms of all species must balance their allocation to growth, survival and recruitment. Among tree species, evolution has resulted in different life-history strategies for partitioning resources to these key demographic processes. Life-history strategies in tropical forests have often been shown to align along a trade-off between fast growth and high survival, i.e. the well-known fast-slow continuum. In addition, an orthogonal trade-off has been proposed between tall stature – resulting from fast growth and high survival...

Low toxicity crop fungicide (Fenbuconazole) impacts reproductive male quality signals leading to a reduction of mating success in a wild solitary bee

Samuel Boff, Taina Conrad, Josué Raizer, Marten Wehrhahn, Melis Bayer, Anna Friedel, Panagiotis Theodorou, Thomas Schmitt & Daniela Lupi
Recent reports on bee health suggest that sub-lethal doses of pesticides have negative effects on wild bee reproduction and ultimately on their population growth. Females of the solitary horned mason bee, Osmia cornuta, evaluate thoracic vibrations and odours of males to assess male quality. When certain criteria are met, the female accepts the male and copulates. However, these signals were found to be modified by sub-lethal doses of pesticides in other hymenopterans. Here, we tested...

Climate and mycorrhizae mediate the relationship of tree species diversity and carbon stocks in subtropical forests

Guoyong Yan, Franca J. Bongers, Stefan Trogisch, Yin Li, Guoke Chen, Haoru Yan, Xianglu Deng, Keping Ma & Xiaojuan Liu
1. It is increasingly being recognized that tree species diversity has positive effects on forest ecosystem carbon (C) stock. However, at broad spatial scales this relationship may depend on climate conditions and species mycorrhizal associations. 2. Here, observations from 667 forest plots in subtropical China, were used to investigate the effects of species diversity, mean annual precipitation (MAP), mean annual temperature (MAT) and mycorrhizal type (arbuscular or ectomycorrhizal) on the forest C stock and its...

Enemy exclusion effects on biodiversity-productivity relationship in subtropical forest experiment

Yuanyuan Huang, Andreas Schuldt, Lydia Hönig, Bo Yang, Xiaojuan Liu, Helge Brülheide, Keping Ma, Bernhard Schmid & Pascal Niklaus
This data set is described in full detail in Huang et al. (2022) Journal of Ecology XXX. In brief, we used a large tree biodiversity experiment (BEF-China), established in 2009-2010, to test whether the application of fungicide or insecticide changes observed tree species richness effects on tree growth. We used a subset of plots in which tree species numbers ranged from 1 to 8. To these plots, a factorial split-plot treatment was added in April...

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Affiliations

  • Martin Luther University Halle-Wittenberg
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  • Chinese Academy of Sciences
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  • Thammasat University
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  • Anhalt University of Applied Sciences
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  • University of Würzburg
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  • Columbia University
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  • Field Museum of Natural History
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  • National Sun Yat-sen University
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  • National Dong Hwa University
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  • University of Münster
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