scholarly journals Dispersal behaviour and riverine network connectivity shape the genetic diversity of freshwater amphipod metapopulations

2021 ◽  
Author(s):  
Roman Alther ◽  
Emanuel A. Fronhofer ◽  
Florian Altermatt
Keyword(s):  
Genetic Diversity ◽  
Network Connectivity ◽  
Dispersal Behaviour

Dispersal by Benthic Invertebrates: The in Situ Swimming Behaviour of the Amphipod Corophium Volutator

1988 ◽  
Vol 68 (4) ◽  
pp. 565-579 ◽  
Author(s):  
R. G. Hughes
Keyword(s):  
Genetic Diversity ◽  
High Mortality ◽  
Benthic Invertebrates ◽  
Environmental Changes ◽  
Mortality Rates ◽  
Corophium Volutator ◽  
Dispersal Behaviour ◽  
Planktonic Larva ◽  
Limited Mobility

Studies of the dispersal behaviour of marine and estuarine benthic invertebrates have concentrated on the majority of species where the individuals disperse as a planktonic larva. The view that seems to be prevalent, summarised by Crisp (1974, 1976), is that larvae are an adaptation to allow species to colonise transient habitats and for species with adults of limited mobility to colonise distant habitats. The spreading of the species over wide areas has the advantages of reducing competition and facilitating greater genetic diversity, leaving the species more adaptable to subsequent environmental changes. These advantages are greater with longer distances travelled, and are an explanation for larvae spending up to several weeks drifting in the plankton, despite the acknowledged high mortality rates associated with the pelagic existence.

scholarly journals Dispersal rate and riverine network connectivity shape the genetic diversity of freshwater amphipod metapopulations

2020 ◽  
Author(s):  
Roman Alther ◽  
Emanuel A. Fronhofer ◽  
Florian Altermatt
Keyword(s):  
Genetic Diversity ◽  
Population Genetic ◽  
Network Connectivity ◽  
Simulation Models ◽  
Spatial Arrangement ◽  
Stochastic Simulations ◽  
Amphipod Species ◽  
Dispersal Rate ◽  
Population Genetic Diversity ◽  
Genetic Diversity And Structure

AbstractTheory predicts that the distribution of genetic diversity in a landscape is strongly dependent on the connectivity of the metapopulation and the dispersal of individuals between patches. However, the influence of explicit spatial configurations such as dendritic landscapes on the genetic diversity and structure of metapopulations is still understudied, and theoretical corroborations of empirical patterns are largely lacking. Here, we used real-world microsatellite data and stochastic simulations of two metapopulations of freshwater amphipods in a 28,000 km2 riverine network to study the influence of spatial connectivity and dispersal strategies on their spatial genetic diversity and structure. We found a significant imprint of the riverine network connectivity on the genetic diversity of both amphipod species. Data from 95 sites showed that allelic richness and observed heterozygosity significantly increased towards more central nodes of the network. In simulation models, dispersal rate was suggested to be the key factor explaining the empirically observed distribution of genetic diversity. Contrary to often-claimed expectations, however, the relevance of directionality of dispersal was only minor. Surprisingly, also the consideration of site-specific carrying capacities, for example by assuming a direct dependency of population size with local river size, substantially decreased the model fit to empirical data. This highlights that directional dispersal and the spatial arrangement of population sizes may have a smaller relevance in shaping population genetic diversity of riverine organisms than previously thought, and that dispersal along the river network is the single-most important determinant of population genetic diversity.

Increased Default Mode Network Connectivity Following EEG Neurofeedback in PTSD

2012 ◽  
Author(s):  
Rosemarie Kluetsch ◽  
Tomas Ros ◽  
Jean Theberge ◽  
Paul Frewen ◽  
Christian Schmahl ◽  
...  
Keyword(s):  
Default Mode Network ◽  
Network Connectivity ◽  
Default Mode ◽  
Eeg Neurofeedback

Climate change will hit genetic diversity

Nature ◽  
2011 ◽  
Keyword(s):  
Climate Change ◽  
Genetic Diversity

Genetic diversity of malaria vector

Nature India ◽  
2007 ◽  
Author(s):  
Subhra Priyadarshini
Keyword(s):  
Genetic Diversity ◽  
Malaria Vector

Genetic diversity of HLA in the Indian population

1997 ◽  
Vol 56 (1-3) ◽  
pp. 233
Author(s):  
N Mehra
Keyword(s):  
Genetic Diversity ◽  
Indian Population

Genetic diversity of Peucedanum japonicum using Internal Transcribed Spacer (ITS) sequence

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
YH Kim ◽  
JA Ryuk ◽  
BS Ko ◽  
JW Lee ◽  
SE Oh ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Internal Transcribed Spacer ◽  
Its Sequence

Genetic diversity revealed by ISSR molecular marker in different species of Ocimum

Planta Medica ◽  
2010 ◽  
Vol 76 (12) ◽  
Author(s):  
K Shinde ◽  
V Shinde ◽  
J Kurane ◽  
A Harsulkar ◽  
K Mahadik
Keyword(s):  
Genetic Diversity ◽  
Molecular Marker

Increased Intrinsic Network Connectivity in Grapheme-Colour Synaesthesia

2012 ◽  
Vol 43 (01) ◽  
Author(s):  
A Dovern ◽  
GR Fink ◽  
ACB Fromme ◽  
AM Wohlschläger ◽  
PH Weiss-Blankenhorn ◽  
...  
Keyword(s):  
Network Connectivity
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