Dispersal ability and habitat requirements determine landscape‐level genetic patterns in desert aquatic insects

Phillipsen, Ivan C.; Kirk, Emily H.; Bogan, Michael T.; Mims, Meryl C.; Olden, Julian D.; Lytle, David A.

doi:10.1111/mec.13003

Cited by 86 publications

(107 citation statements)

References 59 publications

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“…It plays a decisive role in species diversity and ecosystem diversity. It is also the basis of population survival, development and evolution (Barrett and Kidwell 1998;Phillipsen et al 2015). The polymorphic loci percentage of S. grandis and S. krylovii populations (90.20 and 93.54 % respectively) and the total Nei's genetic diversity indices (He) (0.2522 and 0.2261 respectively) detected in this research are similar to that previously reported for these two species.…”

Section: Population Of Stipa Species Show Rich Genetic Diversitysupporting

confidence: 87%

“…A common approach used in landscape genetic studies is to compare the matrices between genetic distances and geographic or landscape distance of isolated populations in large scales . However, recent studies have increasingly conducted on the individuals or populations that continuously distributed across small spatial scales to understand micro-evolutionary processes (Anderson et al 2010;Cushman and Landguth 2010;Freedman et al 2010;Zancolli et al 2014;Phillipsen et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Moderate grazing promotes genetic diversity of Stipa species in the Inner Mongolian steppe

et al. 2015

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Context Disturbances may affect the spatial patterns of plant genetic diversity, but these effects are not yet well understood for lack of direct experimental evidence. Grazing is one of such environmental disturbance factors which may lead to small-scale spatial heterogeneity in natural grasslands. Objectives Our main goal was to determine whether a grazing disturbance alters population genetic diversity and genetic structure of the dominant species in the Inner Mongolia Steppe. Methods We performed inter-simple sequence repeat (ISSR) molecular marker analysis on populations of Stipa grandis and S. krylovii which were exposed to five consecutive years of varying degrees of grazing disturbance. Results The amplification results showed that the genetic diversity of both S. grandis and S. krylovii populations varied under different grazing intensities; the highest diversity (Nei's index and Shannon's index) were under moderate disturbance, whereas the lowest under the heavy grazing. The coefficient of gene differentiation (G ST ) of S. grandis and S. krylovii populations were 16.82 and 21.00°%, respectively. These results suggest that the genetic diversity of these two dominant populations was altered by the smallscale grazing disturbance, which provides new evidence supporting the theories of landscape genetics. Conclusions The enhancement of moderate grazing on genetic diversity implies the necessity to involve animal grazing in the design of management regimes for biodiversity conservation of the Inner Mongolia steppes.

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Section: Population Of Stipa Species Show Rich Genetic Diversitysupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Moderate grazing promotes genetic diversity of Stipa species in the Inner Mongolian steppe

et al. 2015

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“…Following recent research in landscape genetics (e.g. Phillipsen et al., ; Van Strien, Keller & Holderegger, ), we used minimum likelihood population effect (MLPE, Clarke, Rothery & Raybould, ) to account for the non‐independence of the distance matrices. In this method, the random effect of the model incorporates a parameter (p) that accounts for the proportion of the total variance due to the correlation between distances that originates from the same sampling sites.…”

Section: Methodsmentioning

confidence: 99%

Do metacommunities vary through time? Intermittent rivers as model systems

Sarremejane

Cañedo‐Argüelles

Prat

et al. 2017

Journal of Biogeography

113

106

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Aim Metacommunity assembly mechanisms have been traditionally considered stable through time. However, in highly dynamic systems with varying local environmental conditions and patch connectivity, communities are likely to experience temporal shifts in their assembly mechanisms. Here, we used a set of perennial (PR) and intermittent (IR) rivers to assess if assembly mechanisms vary seasonally in response to flow intermittence. Location Mediterranean climate region (100,000 km2), Spain. Methods We used a modelling approach to assess the relative effect of environmental sorting and dispersal‐based processes on aquatic invertebrate metacommunities within and across river types at four distinct hydrological periods. We used local environmental variables to assess environmental sorting, and considered geographical, network and topographical distances as different dispersal surrogates. Linear mixed effect models accounting for the non‐independence of pairwise distances were used to assess the relationships between community dissimilarity and distance matrices. Results Assembly mechanisms were more temporally stable in PR than in IR. In PR, community dissimilarities were equally related to environmental and geographical distances suggesting codominance of species sorting and dispersal‐based assembly mechanisms. In IR, environmental distance best explained community dissimilarities during the dry period when flow cessation imposes strong environmental sorting, whereas metacommunity organization was much more stochastic during the rewetting period when high flows may randomly reorganize communities. Dispersal processes dominated assembly mechanisms between PR and IR during the rewetting period suggesting an increase in recolonization processes linking both river types following the dry period. Geographical and topographical distances best explained community variability, suggesting that overland dispersal dominates in river networks fragmented by drying events. Main conclusions Aquatic invertebrate metacommunity assembly mechanisms vary seasonally in response to changes in hydrological conditions. The temporal dimension should be better incorporated into metacommunity studies in highly dynamic systems such as intermittent rivers.

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“…; Phillipsen et al . ), but they also indicate that it is complicated to obtain accurate predictions about the degree of habitat fragmentation beyond of which population genetic structure and diversity are affected due to complex interactions among multiple influential factors (Lange et al . ; Callens et al .…”

Section: Conclusion and Implications For Conservationmentioning

confidence: 99%

Discordant patterns of genetic and phenotypic differentiation in five grasshopper species codistributed across a microreserve network

2015

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Conservation plans can be greatly improved when information on the evolutionary and demographic consequences of habitat fragmentation is available for several codistributed species. Here, we study spatial patterns of phenotypic and genetic variation among five grasshopper species that are codistributed across a network of microreserves but show remarkable differences in dispersal-related morphology (body size and wing length), degree of habitat specialization and extent of fragmentation of their respective habitats in the study region. In particular, we tested the hypothesis that species with preferences for highly fragmented microhabitats show stronger genetic and phenotypic structure than codistributed generalist taxa inhabiting a continuous matrix of suitable habitat. We also hypothesized a higher resemblance of spatial patterns of genetic and phenotypic variability among species that have experienced a higher degree of habitat fragmentation due to their more similar responses to the parallel large-scale destruction of their natural habitats. In partial agreement with our first hypothesis, we found that genetic structure, but not phenotypic differentiation, was higher in species linked to highly fragmented habitats. We did not find support for congruent patterns of phenotypic and genetic variability among any studied species, indicating that they show idiosyncratic evolutionary trajectories and distinctive demographic responses to habitat fragmentation across a common landscape. This suggests that conservation practices in networks of protected areas require detailed ecological and evolutionary information on target species to focus management efforts on those taxa that are more sensitive to the effects of habitat fragmentation.

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Dispersal ability and habitat requirements determine landscape‐level genetic patterns in desert aquatic insects

Cited by 86 publications

References 59 publications

Moderate grazing promotes genetic diversity of Stipa species in the Inner Mongolian steppe

Moderate grazing promotes genetic diversity of Stipa species in the Inner Mongolian steppe

Do metacommunities vary through time? Intermittent rivers as model systems

Discordant patterns of genetic and phenotypic differentiation in five grasshopper species codistributed across a microreserve network

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