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个人简介
Research in my lab aims to understand the evolutionary processes that generate biological diversity. Using integrative approaches we try to answer the questions of (a) how and why organisms diversify phenotypically, (b) what reproductive barriers are important in facilitating a reduction in gene flow between diverging populations, (c) what evolutionary forces shape these reproductive barriers, (d) what role does human-induced environmental change have on biodiversity in general, and the stability of population differentiation among diverging populations in particular, and (e) why are some species so potent invaders?
My main research focuses on population divergence in livebearing fishes (Poeciliidae) from extreme habitats (in collaboration with Martin Plath, Ingo Schlupp and Michael Tobler). Extreme habitats are characterized by the presence of physiochemical stressors that require (of any organism tolerating them) costly adaptations that are absent in closely related species. The presence of such stressors creates complex environmental gradients and affects both the ecology of individuals and the evolutionary trajectory of populations living along the gradients. Examples for such stressors include permanent darkness (as experienced in subterranean habitats) and hydrogen sulfide (H2S) toxicity. H2S is acutely toxic to most metazoans, because it competes with oxygen in the respiratory chain, and this effect is aggravated by the extreme hypoxia also associated with the presence of this natural toxicant. Even at sublethal concentrations, H2S has several adverse effects on non-adapted fishes, including reduced egg production, smaller-sized larvae, and decreased gonadosomatic index. Thus, organisms able to cope with persistently high concentrations of H2S usually exhibit various specific adaptations. This makes H2S a source of strong divergent selection between locally adapted populations/species and populations/species that cannot tolerate it, and consequently H2S has recently been demonstrated to drive speciation events.
My main research focuses on population divergence in livebearing fishes (Poeciliidae) from extreme habitats (in collaboration with Martin Plath, Ingo Schlupp and Michael Tobler). Extreme habitats are characterized by the presence of physiochemical stressors that require (of any organism tolerating them) costly adaptations that are absent in closely related species. The presence of such stressors creates complex environmental gradients and affects both the ecology of individuals and the evolutionary trajectory of populations living along the gradients. Examples for such stressors include permanent darkness (as experienced in subterranean habitats) and hydrogen sulfide (H2S) toxicity. H2S is acutely toxic to most metazoans, because it competes with oxygen in the respiratory chain, and this effect is aggravated by the extreme hypoxia also associated with the presence of this natural toxicant. Even at sublethal concentrations, H2S has several adverse effects on non-adapted fishes, including reduced egg production, smaller-sized larvae, and decreased gonadosomatic index. Thus, organisms able to cope with persistently high concentrations of H2S usually exhibit various specific adaptations. This makes H2S a source of strong divergent selection between locally adapted populations/species and populations/species that cannot tolerate it, and consequently H2S has recently been demonstrated to drive speciation events.
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Molecular ecologypp.e17818-e17818, (2025)
Sara Pirroni, Francesca Leggieri, Jessica Cuccuru,Paolo Domenici, Mark J. F. Brown,Stefano Marras,Rüdiger Riesch
Frontiers in Fish Science (2024)
Molecular Ecologyno. 24 (2023): 6809-6823
Rudiger Riesch,Marcio S. Araujo, Stuart Bumgarner,Caitlynn Filla, Laura Pennafort,Taylor R. Goins, Darlene Lucion,Amber M. Makowicz,Ryan A. Martin,Sara Pirroni,R. Brian Langerhans
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#Papers: 139
#Citation: 3685
H-Index: 36
G-Index: 54
Sociability: 5
Diversity: 3
Activity: 12
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