Role of ancient lakes in genetic and phenotypic diversification of freshwater snails

2019 ◽  
Vol 28 (23) ◽  
pp. 5032-5051 ◽  
Author(s):  
Takahiro Hirano ◽  
Takumi Saito ◽  
Yoshihiro Tsunamoto ◽  
Joichiro Koseki ◽  
Larisa Prozorova ◽  
...  
Keyword(s):  
Freshwater Snails ◽  
Ancient Lakes ◽  
Phenotypic Diversification

scholarly journals The signature of competition in ecomorphological traits across the avian radiation

2020 ◽  
Vol 287 (1938) ◽  
pp. 20201585
Author(s):  
A. M. Chira ◽  
C. R. Cooney ◽  
J. A. Bright ◽  
E. J. R. Capp ◽  
E. C. Hughes ◽  
...  
Keyword(s):  
Species Interactions ◽  
Biological Diversity ◽  
Phenotypic Evolution ◽  
Shared Resources ◽  
Deep Time ◽  
Extant Species ◽  
Phenotypic Diversification ◽  
Best Fit

Competition for shared resources represents a fundamental driver of biological diversity. However, the tempo and mode of phenotypic evolution in deep-time has been predominantly investigated using trait evolutionary models which assume that lineages evolve independently from each other. Consequently, the role of species interactions in driving macroevolutionary dynamics remains poorly understood. Here, we quantify the prevalence for signatures of competition between related species in the evolution of ecomorphological traits across the bird radiation. We find that mechanistic trait models accounting for the effect of species interactions on phenotypic divergence provide the best fit for the data on at least one trait axis in 27 out of 59 clades ranging between 21 and 195 species. Where it occurs, the signature of competition generally coincides with positive species diversity-dependence, driven by the accumulation of lineages with similar ecologies, and we find scarce evidence for trait-dependent or negative diversity-dependent phenotypic evolution. Overall, our results suggest that the footprint of interspecific competition is often eroded in long-term patterns of phenotypic diversification, and that other selection pressures may predominantly shape ecomorphological diversity among extant species at macroevolutionary scales.

scholarly journals Role of geography and climatic oscillations in governing into-India dispersal of freshwater snails of the family: Viviparidae

2019 ◽  
Vol 138 ◽  
pp. 174-181 ◽  
Author(s):  
Maitreya Sil ◽  
N.A. Aravind ◽  
K. Praveen Karanth
Keyword(s):  
Freshwater Snails ◽  
Climatic Oscillations ◽  
The Family

The role of Chaetogaster limnaei in the dynamics of trematode transmission in natural populations of freshwater snails

1977 ◽  
Vol 54 (1) ◽  
pp. 55-60 ◽  
Author(s):  
S. A. Fashuyi ◽  
Modup� O. Williams
Keyword(s):  
Natural Populations ◽  
Freshwater Snails

scholarly journals MicroRNA Gene Regulation in Extremely Young and Parallel Adaptive Radiations of Crater Lake Cichlid Fish

2019 ◽  
Vol 36 (11) ◽  
pp. 2498-2511 ◽  
Author(s):  
Paolo Franchini ◽  
Peiwen Xiong ◽  
Carmelo Fruciano ◽  
Ralf F Schneider ◽  
Joost M Woltering ◽  
...  
Keyword(s):  
Gene Regulation ◽  
Molecular Mechanisms ◽  
Expression Patterns ◽  
Mirna Gene ◽  
Evolutionary Divergence ◽  
Mirna Regulation ◽  
Gene Target ◽  
Gene Pairs ◽  
Phenotypic Diversification

AbstractCichlid fishes provide textbook examples of explosive phenotypic diversification and sympatric speciation, thereby making them ideal systems for studying the molecular mechanisms underlying rapid lineage divergence. Despite the fact that gene regulation provides a critical link between diversification in gene function and speciation, many genomic regulatory mechanisms such as microRNAs (miRNAs) have received little attention in these rapidly diversifying groups. Therefore, we investigated the posttranscriptional regulatory role of miRNAs in the repeated sympatric divergence of Midas cichlids (Amphilophus spp.) from Nicaraguan crater lakes. Using miRNA and mRNA sequencing of embryos from five Midas species, we first identified miRNA binding sites in mRNAs and highlighted the presences of a surprising number of novel miRNAs in these adaptively radiating species. Then, through analyses of expression levels, we identified putative miRNA/gene target pairs with negatively correlated expression level that were consistent with the role of miRNA in downregulating mRNA. Furthermore, we determined that several miRNA/gene pairs show convergent expression patterns associated with the repeated benthic/limnetic sympatric species divergence implicating these miRNAs as potential molecular mechanisms underlying replicated sympatric divergence. Finally, as these candidate miRNA/gene pairs may play a central role in phenotypic diversification in these cichlids, we characterized the expression domains of selected miRNAs and their target genes via in situ hybridization, providing further evidence that miRNA regulation likely plays a role in the Midas cichlid adaptive radiation. These results provide support for the hypothesis that extremely quickly evolving miRNA regulation can contribute to rapid evolutionary divergence even in the presence of gene flow.

scholarly journals Disjunct distributions of freshwater snails testify to a central role of the Congo system in shaping biogeographical patterns in Africa

2014 ◽  
Vol 14 (1) ◽  
pp. 42 ◽  
Author(s):  
Roland Schultheiß ◽  
Bert Van Bocxlaer ◽  
Frank Riedel ◽  
Thomas von Rintelen ◽  
Christian Albrecht
Keyword(s):  
Freshwater Snails

Role of chemical signalling in release of motor programs during embryogenesis of freshwater snails Lymnaea stagnalis and Helisoma trivolvis

2007 ◽  
Vol 38 (2) ◽  
pp. 66-75 ◽  
Author(s):  
E. E. Voronezhskaya ◽  
M. Yu. Khabarova ◽  
A. K. Chaban ◽  
L. P. Nezlin
Keyword(s):  
Lymnaea Stagnalis ◽  
Freshwater Snails ◽  
Motor Programs ◽  
Helisoma Trivolvis ◽  
Chemical Signalling

Endocrine interactions between digenetic trematode parasites and their intermediate hosts, freshwater snails, with emphasis on the possible role of ecdysteroids

1989 ◽  
Vol 15 (3) ◽  
pp. 201-209 ◽  
Author(s):  
MARIJKE DE JONG-BRINK ◽  
HENK D.F.H. SCHALLIG ◽  
MAURICE CHARLET ◽  
COR ZONNEVELD
Keyword(s):  
Digenetic Trematode ◽  
Freshwater Snails ◽  
Intermediate Hosts ◽  
Trematode Parasites

scholarly journals Behavioural changes and the adaptive diversification of pigeons and doves

2013 ◽  
Vol 280 (1755) ◽  
pp. 20122893 ◽  
Author(s):  
Oriol Lapiedra ◽  
Daniel Sol ◽  
Salvador Carranza ◽  
Jeremy M. Beaulieu
Keyword(s):  
Evolutionary Biology ◽  
Evolutionary Divergence ◽  
Major Question ◽  
Adaptive Diversification ◽  
Behavioural Changes ◽  
Evolutionary Diversification ◽  
Morphological Specialization ◽  
Phenotypic Diversification ◽  
Evolutionary Consequences

What factors determine the extent of evolutionary diversification remains a major question in evolutionary biology. Behavioural changes have long been suggested to be a major driver of phenotypic diversification by exposing animals to new selective pressures. Nevertheless, the role of behaviour in evolution remains controversial because behavioural changes can also retard evolutionary change by hiding genetic variation from selection. In the present study, we apply recently implemented Ornstein–Uhlenbeck evolutionary models to show that behavioural changes led to associated evolutionary responses in functionally relevant morphological traits of pigeons and doves (Columbiformes). Specifically, changes from terrestrial to arboreal foraging behaviour reconstructed in a set of phylogenies brought associated shorter tarsi and longer tails, consistent with functional predictions. Interestingly, the transition to arboreality accelerated the rates of evolutionary divergence, leading to an increased morphological specialization that seems to have subsequently constrained reversals to terrestrial foraging. Altogether, our results support the view that behaviour may drive evolutionary diversification, but they also highlight that its evolutionary consequences largely depend on the limits imposed by the functional demands of the adaptive zone.

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