19 Works

Data from: Transcriptome profiling of immune tissues reveals habitat-specific gene expression between lake and river sticklebacks

Yun Huang, Frederic Chain, Mahesh Panchal, Christophe Eizaguirre, Martin Kalbe, Tobias Lenz, Irene Samonte, Monika Stoll, Erich Bornberg-Bauer, Thorsten B. Reusch, Manfred Milinski & Philine Feulner
The observation of habitat-specific phenotypes suggests the action of natural selection. The three-spined stickleback (Gasterosteus aculeatus) has repeatedly colonized and adapted to diverse freshwater habitats across the northern hemisphere since the last glaciation, while giving rise to recurring phenotypes associated with specific habitats. Parapatric lake and river populations of sticklebacks harbour distinct parasite communities, a factor proposed to contribute to adaptive differentiation between these ecotypes. However, little is known about the transcriptional response to the...

Data from: A further cost for the sicker sex? Evidence for male-biased parasite-induced vulnerability to predation

Jessica F. Stephenson, Cormac Kinsella, Joanne Cable & Cock Van Oosterhout
Males are typically the sicker sex. Data from multiple taxa indicate that they are more likely to be infected with parasites, and are less “tolerant,” or less able to mitigate the fitness costs of a given infection, than females. One cost of infection for many animals is an increased probability of being captured by a predator. A clear, hitherto untested, prediction is therefore that this parasite-induced vulnerability to predation is more pronounced among males than...

Data from: Spatially cascading effect of perturbations in experimental meta-ecosystems

Eric Harvey, Isabelle Gounand, Pravin Ganesanandamoorthy & Florian Altermatt
Ecosystems are linked to neighbouring ecosystems not only by dispersal, but also by the movement of subsidy. Such subsidy couplings between ecosystems have important landscape-scale implications because perturbations in one ecosystem may affect community structure and functioning in neighbouring ecosystems via increased/decreased subsidies. Here, we combine a general theoretical approach based on harvesting theory and a two-patch protist meta-ecosystem experiment to test the effect of regional perturbations on local community dynamics. We first characterized the...

Data from: Taxonomic, phylogenetic and ecological diversity of Niphargus (Amphipoda: Crustacea) in the Hölloch cave system (Switzerland)

Cene Fišer, Marjeta Konec, Roman Alther, Vid Švara & Florian Altermatt
Groundwater belongs to the spatially most extensive, but least explored freshwater systems. On a global scale, the species richness of several subterranean invertebrate taxa parallels species richness found in surface waters, while on a local scale species richness hardly exceeds 20 species. This results in a high contribution of groundwater ecosystems to regional β- and γ-diversity, and to a smaller degree to α-diversity, and deserves focused attention. In general, more species are to be found...

Data from: Natural selection on immune defense: a field experiment

Laura Langeloh, Jasminca Maria Behrmann-Godel, Otto Seppälä & Jasminca Behrmann-Godel
Predicting the evolution of phenotypic traits requires an understanding of natural selection on them. Despite its indispensability in the fight against parasites, selection on host immune defense has remained understudied. Theory predicts immune traits to be under stabilizing selection due to associated trade-offs with other fitness-related traits. Empirical studies, however, report mainly positive directional selection. This discrepancy could be caused by low phenotypic variation in the examined individuals and/or variation in host resource level that...

Data from: Dendritic network structure and dispersal affect temporal dynamics of diversity and species persistence

Mathew Seymour, Emanuel A. Fronhofer & Florian Altermatt
Landscape connectivity structure, specifically the dendritic network structure of rivers, is expected to influence community diversity dynamics by altering dispersal patterns, and subsequently the unfolding of species interactions. However, previous comparative and experimental work on dendritic metacommunities has studied diversity mostly from an equilibrium perspective. Here we investigated the effect of dendritic versus linear network structure on local (α-diversity), among (β-diversity) and total (γ-diversity) temporal species community diversity dynamics. Using a combination of microcosm experiments,...

Data from: Subsidies mediate interactions between communities across space

Isabelle Gounand, Eric Harvey, Pravin Ganesanandamoorthy & Florian Altermatt
Most spatial ecology focuses on how species dispersal affects community dynamics and coexistence. Ecosystems, however, are also commonly connected by flows of resources. We experimentally tested how neighbouring communities indirectly influence each other in absence of dispersal, via resource exchanges. Using two-patch microcosm meta-ecosystems, we manipulated community composition and dynamics, by varying separately species key functional traits (autotroph versus heterotroph species and size of consumer species) and trophic structure of aquatic communities (species growing alone,...

Data from: Demographic modelling with whole-genome data reveals parallel origin of similar Pundamilia cichlid species after hybridization

Joana I. Meier, Vitor C. Sousa, David Alexander Marques, Oliver M. Selz, Catherine E. Wagner, Laurent Excoffier & Ole Seehausen
Modes and mechanisms of speciation are best studied in young species pairs. In older taxa, it is increasingly difficult to distinguish what happened during speciation from what happened after speciation. Lake Victoria cichlids in the genus Pundamilia encompass a complex of young species and polymorphic populations. One Pundamilia species pair, P. pundamilia and P. nyererei, is particularly well suited to study speciation because sympatric population pairs occur with different levels of phenotypic differentiation and reproductive...

Data from: Microhabitat partitioning in seagrass mesograzers is driven by consistent species choices across multiple predator and competitor contexts

Moritz D. Lürig, Rebecca J. Best & John J. Stachowicz
Explanations for the coexistence of multiple species from the same functional group or taxonomic clade frequently include fine-scale resource partitioning. However, despite the hypothesized importance of niche partitioning, we know relatively little about the underlying mechanisms. For example, differences in resource use may be fixed consequences of organism traits, or they may be achieved via context-dependent behaviors. In this study we investigated mechanisms of microhabitat partitioning using eight species of marine mesograzers inhabiting seagrass and...

Data from: Flow cytometry combined with viSNE for analysis of microbial biofilms and detection of microplastics

Linn Sgier, Remo Freimann, Anze Zupanic & Alexandra Kroll
Biofilms serve essential ecosystem functions and are used in different technical applications. Studies from stream ecology and waste-water treatment have shown that biofilm functionality depends to a great extent on community structure. Here we present a fast and easy-to-use method for individual cell-based analysis of stream biofilms, based on stain-free flow cytometry and visualization of the high-dimensional data by viSNE. The method allows the combined assessment of community structure, decay of phototrophic organisms and presence...

Data from: Color phenotypes are under similar genetic control in two distantly related species of Timema stick insect

Aaron Arthur Comeault, Clarissa Ferreira Carvalho, Stuart R. Dennis, Victor Soria-Carrasco, Patrik Nosil & Stuart Dennis
Ecology and genetics are both of general interest to evolutionary biologists as they can influence the phenotypic and genetic response to selection. The stick insects Timema podura and T. cristinae exhibit a green/melanistic body color polymorphism that is subject to different ecologically-based selective regimes in the two species. Here we describe aspects of the genetics of this color polymorphism in T. podura, and compare this to previous results in T. cristinae. We first show that...

Data from: Managing cryptic biodiversity: Fine-scale intralacustrine speciation along a benthic gradient in Alpine whitefish (Coregonus spp.)

Alan G. Hudson, Baenz Lundsgaard-Hansen, Kay Lucek, Pascal Vonlanthen & Ole Seehausen
Whitefish (Coregonus spp.) are an important catch for many freshwater fisheries, particularly in Switzerland. In support of this, supplemental stocking of whitefish species is carried out, despite lacking complete knowledge of the extent, distribution and origin of whitefish diversity in these lakes, potentially threatening local endemics via artificial gene flow. Here, we investigate phenotypic and genetic differentiation among coexisting whitefish species spawning along a depth gradient in a subalpine Swiss lake to better delineate intralacustrine...

Data from: Information use shapes the dynamics of range expansions into environmental gradients

Emanuel A. Fronhofer, Nicolai Nitsche & Florian Altermatt
Globally, the geographical distributions of species are dynamic and strongly influenced by dispersal. At the same time, range dynamics feed back and may select for increased dispersal at expanding range fronts. This interplay between macroecological and evolutionary dynamics happens almost universally across environmental gradients and such gradients can have a direct impact on the fitness of organisms due to the match or mismatch between an individual's environmental optimum and the current conditions along the gradient....

Data from: Distribution and population genetic variation of cryptic species of the Alpine mayfly Baetis alpinus (Ephemeroptera: Baetidae) in the Central Alps

Marie Aurore Leys, Irene Keller, Katja Räsänen, Jean-Luc Gattolliat & Christopher T. Robinson
Background: Many species contain evolutionarily distinct groups that are genetically highly differentiated but morphologically difficult to distinguish (i.e., cryptic species). The presence of cryptic species poses significant challenges for the accurate assessment of biodiversity and, if unrecognized, may lead to erroneous inferences in many fields of biological research and conservation. Results: We tested for cryptic genetic variation within the broadly distributed alpine mayfly Baetis alpinus across several major European drainages in the central Alps. Bayesian...

Data from: Local human pressures influence gene flow in a hybridizing Daphnia species complex

Benjamin Alric, Markus Möst, Isabelle Domaizon, Cecile Pignol, Piet Spaak & Marie-Elodie Perga
Anthropogenic environmental changes are considered critical drivers of the genetic structure of populations and communities through, for example, the facilitation of introgressive hybridization between syntopic species. However, the mechanisms by which environmental perturbations trigger changes in the genetic structure of populations and communities, such as the processes that determine the directionality of hybridization and patterns of mitochondrial introgression over many generations, remain largely unexplored. In this study, the changes in genetic structure of hybridizing members...

Data from: Biotic and abiotic variables influencing plant litter breakdown in streams: a global study

Luz Boyero, Richard Pearson, Cang Hui, Mark Gessner, Javier Perez, Markos Alexandrou, Manuel Graça, Bradley Cardinale, Ricardo Albariño, M. Arunachalam, Leon Barmuta, Andrew Boulton, Andreas Bruder, Marcos Callisto, Eric Chauvet, Russell Death, David Dudgeon, Andrea Encalada, Veronica Ferreira, Ricardo Figueroa, Alex Flecker, , Julie Helson, Tomoya Iwata, Tajang Jinggut … & Catherine Yule
Plant litter breakdown is a key ecological process in terrestrial and freshwater ecosystems. Streams and rivers, in particular, have high rates of carbon dioxide evasion and they contribute substantially to global carbon fluxes. However, there is little information available on the relative roles of different drivers of plant litter breakdown in fresh waters, particularly at large scales. We present a global-scale study of litter breakdown in streams to compare the roles of biotic, climatic and...

Data from: Rapid evolutionary loss of metal resistance revealed by hatching decades-old eggs

Patrick William Turko, Laura Sigg, Juliane Hollender, Piet Spaak & Patrick Turko
We investigated the evolutionary response of an ecologically important freshwater crustacean, Daphnia, to a rapidly changing toxin environment. From the 1920s until the 1960s, the use of leaded gasoline caused the aquatic concentration of Pb to increase at least 5-fold, presumably exerting rapid selective pressure on organisms for resistance. We predicted that Daphnia from this time of intense pollution would display greater resistance than those hatched from times of lower pollution. This question was addressed...

Data from: Genomic landscape of early ecological speciation initiated by selection on nuptial colour

David Alexander Marques, Kay Lucek, Marcel Philipp Haesler, Anna Fiona Feller, Joana Isabel Meier, Catherine Wagner, Laurent Excoffier, Ole Seehausen & Catherine E. Wagner
Ecological speciation is the evolution of reproductive isolation as a consequence of direct divergent natural selection or ecologically mediated divergent sexual selection. While the genomic signature of the former has been extensively studied in recent years, only few examples exist for genomic differentiation where environment-dependent sexual selection has played an important role. Here, we describe a very young (~90 years old) population of threespine sticklebacks exhibiting phenotypic and genomic differentiation between two habitats within the...

Data from: Differences in male coloration are predicted by divergent sexual selection between populations of a cichlid fish

Oliver M. Selz, Rahel Thommen, Michele R. Pierotti, Jaime M. Anaya-Rojas, Ole Seehausen & M. E. R. Pierotti
Female mating preferences can influence both intraspecific sexual selection and interspecific reproductive isolation, and have therefore been proposed to play a central role in speciation. Here, we investigate experimentally in the African cichlid fish Pundamilia nyererei if differences in male coloration between three para-allopatric populations (i.e. island populations with gene flow) of P. nyererei are predicted by differences in sexual selection by female mate choice between populations. Second, we investigate if female mating preferences are...

Registration Year

  • 2016
    19

Resource Types

  • Dataset
    19

Affiliations

  • Swiss Federal Institute of Aquatic Science and Technology
    19
  • University of Zurich
    5
  • University of Bern
    5
  • Swiss Federal Institute of Technology in Zurich
    4
  • Swiss Institute of Bioinformatics
    2
  • University of Wyoming
    2
  • University of Toronto
    2
  • University of Konstanz
    2
  • University of Sheffield
    2
  • University of the Basque Country
    1