19 Works

Data from: The repeatable opportunity for selection differs between pre- and post-copulatory fitness components

Lucas Marie-Orleach, Nikolas Vellnow & Lukas Schärer
In species with multiple mating, intense sexual selection may occur both before and after copulation. However, comparing the strength of pre- and postcopulatory selection is challenging, because i) postcopulatory processes are generally difficult to observe and ii) the often-used opportunity for selection (I) metric contains both deterministic and stochastic components. Here, we quantified pre- and postcopulatory male fitness components of the simultaneously hermaphroditic flatworm, Macrostomum lignano. We did this by tracking fluorescent sperm—using transgenics—through the...

Genotype-by-environment interactions for precopulatory mate guarding in a lek-mating insect

Nikolas Vellnow, Sonja Schindler & Tim Schmoll
In sexually reproducing species males often experience strong pre- and postcopulatory sexual selection leading to a wide variety of male adaptations. One example is mate guarding, where males prevent females from mating with other males either before or after they (will) have mated themselves. In case social conditions vary short-term and in an unpredictable manner and if there is genetic variation in plasticity of mate guarding (i.e. genotype-by-environment interaction, G x E), adaptive behavioral plasticity...

Collision between biological process and statistical analysis revealed by mean-centering

David Westneat, Yimen Araya-Ajoy, Hassen Allegue, Barbara Class, Niels Dingemanse, Ned Dochtermann, Laszlo Garamszegi, Julien Martin, Shinichi Nakagawa, Denis Reale & Holger Schielzeth
1. Animal ecologists often collect hierarchically-structured data and analyze these with linear mixed-effects models. Specific complications arise when the effect sizes of covariates vary on multiple levels (e.g., within vs among subjects). Mean-centering of covariates within subjects offers a useful approach in such situations, but is not without problems. 2. A statistical model represents a hypothesis about the underlying biological process. Mean-centering within clusters assumes that the lower level responses (e.g. within subjects) depend on...

Effects of drought and mycorrhiza on wheat and aphid infestation

Caroline Pons, Ann-Cathrin Voss, Rabea Schweiger & Caroline Müller
The impacts of climate change on worldwide crop production become increasingly severe. Thus, sustainable enhancements of agricultural production are needed. The present study investigated the effects of drought and arbuscular mycorrhizal fungi on wheat plants (Triticum aestivum) and their interaction with aphids. Considering predicted climate change scenarios, wheat plants were exposed to well-watered conditions, continuous (CD) or pulsed (PD) drought and plants were grown without (NM) or with mycorrhizal (AM) fungi. Ear biomass and harvest...

Fitness consequences of seasonally different life histories? A match-mismatch experiment

Anja Guenther, Lucienne Eweleit & Fritz Trillmich
To survive and reproduce successfully, animals have to find the optimal time of breeding. Species living in non-tropical environments often adjust their reproduction plastically according to seasonal changes of the environment. Information about the prevailing season can be transmitted in utero, leading to adaptation of the offspring to the prevailing season. After birth, animals acquire additional personal information about the environment which allows them to adjust their reproductive investment. Here, we tested in a full-factorial...

Disruption as the Dawn of Future Culinary Systems in Science-Fiction Short Stories

Pola Schiavone Kreibohm

Characterizing long-range search behavior in Diptera using complex 3D virtual environments

Shannon Olsson, Pavan Kumar Kaushik & Marian Renz
The exemplary search capabilities of flying insects have established them as one of the most diverse taxa on Earth. However, we still lack the fundamental ability to quantify, represent, and predict trajectories under natural contexts to understand search and its applications. For example, flying insects have evolved in complex multimodal 3D environments, but we do not yet understand which features of the natural world are used to locate distant objects. Here, we independently and dynamically...

Data from: Shared and modality-specific brain regions that mediate auditory and visual word comprehension

Anne Keitel, Joachim Gross & Christoph Kayser
Visual speech carried by lip movements is an integral part of communication. Yet, it remains unclear in how far visual and acoustic speech comprehension are mediated by the same brain regions. Using multivariate classification of full-brain MEG data, we first probed where the brain represents acoustically and visually conveyed word identities. We then tested where these sensory-driven representations are predictive of participants’ trial-wise comprehension. The comprehension-relevant representations of auditory and visual speech converged only in...

Data for the effect of optic flow cues on honeybee flight control in wind

Emily Baird, Norbert Boeddeker & Mandyam Srinivasan
To minimise the risk of colliding with the ground or other obstacles, flying animals need to control both their ground speed and ground height. This task is particularly challenging in wind, where head winds require an animal to increase its airspeed to maintain a constant ground speed and tail winds may generate negative airspeeds, rendering flight more difficult to control. In this study, we investigate how head and tail winds affect flight control in the...

Early sexual dimorphism in the developing gut microbiome of northern elephant seals

Martin Adam Stoffel, Karina Acevedo-Whitehouse, Nami Morales-Durán, Stefanie Grosser, Nayden Chakarov, Oliver Krüger, Hazel J. Nichols, Fernando R. Elorriaga-Verplancken & Joseph I. Hoffman
The gut microbiome is an integral part of a species’ ecology, but we know little about how host characteristics impact its development in wild populations. Here, we explored the role of such intrinsic factors in shaping the gut microbiome of northern elephant seals during a critical developmental window of six weeks after weaning, when the pups stay ashore without feeding. We found substantial sex-differences in the early-life gut microbiome, even though males and females could...

Data from: Independent evolution of ancestral and novel defenses in a genus of toxic plants (Erysimum, Brassicaceae)

Tobias Züst, Susan Strickler, Adrian Powell, Makenzie Mabry, Hong An, Mahdieh Mirzaei, Thomas York, Cynthia Holland, Pavan Kumar, Matthias Erb, Georg Petschenka, José-María Gomez, Francisco Perfectti, Caroline Mueller, Chris Pires, Lukas Mueller & Georg Jander
Phytochemical diversity is thought to result from coevolutionary cycles as specialization in herbivores imposes diversifying selection on plant chemical defenses. Plants in the speciose genus Erysimum (Brassicaceae) produce both ancestral glucosinolates and evolutionarily novel cardenolides as defenses. Here we test macroevolutionary hypotheses on co-expression, co-regulation, and diversification of these potentially redundant defenses across this genus. We sequenced and assembled the genome of E. cheiranthoides and foliar transcriptomes of 47 additional Erysimum species to construct a...

How to build a community? Wie aus einem Open-Access-eBook-Modell eine Community für Open Access in den Geistes- und Sozialwissenschaften wird

Alexandra Jobmann
Von vielen Akteur*innen getragene Projekte schonen die Budgets der Einzelnen und erhöhen die Wahrscheinlichkeit des Gelingens der Vorhaben. Für alle Beteiligten wirft diese Form der Zusammenarbeit jedoch viele Fragen auf. Das Spektrum reicht dabei von Fragen nach der Finanzierung bis hin zur Sichtbarkeit der Kooperation. Der Nationale Open-Access-Kontaktpunkt OA2020-DE und der transcript Verlag haben zur Beantwortung der Fragen die Community-Plattform „ENABLE! Bibliotheken, Verlage und Autor*innen für Open Access in den Humanities und Social Sciences“ entwickelt....

Unstandardized breeding choice grouped by maternal litter

David Arthur Wells, Hazel Nichols, Joseph Hoffman, Michael Cant, Faye Thompson, Harry Marshall & Emma Vitikainen
Banded mongooses play a delicate balancing act between incest and warfare. Some females have to choose between mating with a relative within their own social group or trying to sneakily mate with a male from a rival group during fights between groups. We show that females are more likely to mate with extra-group males when the risk of inbreeding within their group is high, but not all females get this opportunity for extra-group mating.

Data from: Divergence of seminal fluid gene expression and function among natural snail populations

Yumi Nakadera, Alice Smith, Léa Daupagne, Marie-Agnès Coutellec, Joris Koene & Steven Ramm
Seminal fluid proteins (SFPs) can trigger drastic changes in mating partners, mediating post-mating sexual selection and associated sexual conflict. Also, cross-species comparisons have demonstrated that SFPs evolve rapidly and hint that post-mating sexual selection drives their rapid evolution. In principle, this pattern should be detectable within species as rapid among-population divergence in SFP expression and function. However, given the multiple other factors that could vary among populations, isolating divergence in SFP-mediated effects is not straightforward....

Brood parasitism, provisioning rates and breeding phenology of male and female magpie hosts

Marta Precioso, Mercedes Molina-Morales, Alfredo Sánchez-Tójar, Jesús M. Avilés & Juan G. Martínez
Parental care is a costly behaviour that raises the prospects of offspring survival. In species with biparental care these costs are shared by both parents, although there may be a conflict regarding the relative investment of each sex. Avian brood parasites leave all the costs of rearing offspring to their hosts. The magnitude of these costs and their consequences on the relative role of both sexes in parental care and future reproduction remain mostly unknown....

Reproduction affects immune defenses in the guinea pig even under ad libitum food

Fritz Trillmich, Anja Guenther, Manuela Jäckel & Gábor Czirják
Reproduction is one of the most costly processes in the life of an animal. Life history theory assumes that when resources are limiting allocation to reproduction will reduce allocation to other essential processes thereby inducing costs of reproduction. The immune system is vital for survival. If reproduction reduces investment in immune function, this could increase the risk of disease, morbidity and mortality. We here test in the guinea pig, if even under ad libitum food...

Vacuolar sucrose homeostasis is critical for development, seed properties and survival of dark phases of Arabidopsis

Duc Phuong Vu, Cristina Martins Rodrigues, Benjamin Jung, Garvin Meissner, Patrick A.W. Klemens, Daniela Holtgräwe, Lisa Fürtauer, Thomas Nägele, Petra Nieberl, Benjamin Pommerrenig & Ekkehard H. Neuhaus
Although we know that most of the cellular sucrose is present in the cytosol and vacuole, our knowledge on the impact of this sucrose compartmentation on plant properties is still fragmentary. Here we attempted to alter the intracellular sucrose compartmentation of Arabidopsis mesophyll cells by either, overexpression of the vacuolar sucrose loader BvTST2.1 or by generation of mutants with decreased vacuolar invertase activity (amiR vi1-2). Surprisingly, BvTST2.1 overexpression led to increased monosaccharide levels in leaves,...

ORCID DE 2 - Konsolidierung der ORCID-Informationsinfrastruktur in Deutschland

Roland Bertelmann, Patricia Cruse, Elisabeth Niggemann, Dirk Pieper & Irina Sens
This document is a shortened version of the project proposal.

Data from: Genetic analysis of Boletus edulis suggests that intra-specific competition may reduce local genetic diversity as a woodland ages

Vivienne Litzke, Rebecca Nagel, Joseph Hoffman, David Wells & William Amos
Ectomycorrhizal fungi are key players in terrestrial ecosystems yet their mating systems and population dynamics remain poorly understood. We investigated the fine-scale relatedness structure and genetic diversity of Boletus edulis, one of the world’s most commercially important wild mushrooms. Microsatellite genotyping of fruiting bodies from 14 different sites around Bielefeld in Germany revealed little in the way of population structure over a geographic scale of several kilometers. However, on a more local scale we found...

Registration Year

  • 2020
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Affiliations

  • Bielefeld University
    19
  • Ludwig Maximilian University of Munich
    3
  • Estacion Experimental de Zonas Aridas
    2
  • University of Granada
    2
  • University of Quebec at Montreal
    1
  • VU University Amsterdam
    1
  • University of Münster
    1
  • University of Queensland
    1
  • Autonomous University of Queretaro
    1
  • Nuremberg Hospital
    1