The influence of paleoclimate on the distribution of genetic variability and demography of fishes in a large and highly fragmented neotropical river

Pil, Maria W.; Baggio, Rafael Antunes; Tschá, Marcel Kruchelski; Marteleto, Flávio M.; Orélis-Ribeiro, Raphael; Patella, Luciana; Chammas, Marcelo A.; Ostrensky, Antônio; Boeger, Walter A.

doi:10.1007/s10750-017-3285-1

Cited by 3 publications

(3 citation statements)

References 81 publications

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“…Its higher migratory capacity (it can move 1000 km during the reproductive season; Petrere, 1985 ) probably played an important role in causing the lack of spatial genetic differentiation between populations. It is expected that long-distance migratory fishes within a hydrographic basin such as the Upper Paraguay, without physical, abiotic, and/or biotic barriers, will not show a spatial genetic structuring ( Pil et al, 2017 ). However, it seems that S .…”

Section: Discussionmentioning

confidence: 99%

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Genetic Pattern and Demographic History of Salminus brasiliensis: Population Expansion in the Pantanal Region during the Pleistocene

et al. 2018

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Pleistocene climate changes were major historical events that impacted South American biodiversity. Although the effects of such changes are well-documented for several biomes, it is poorly known how these climate shifts affected the biodiversity of the Pantanal floodplain. Fish are one of the most diverse groups in the Pantanal floodplains and can be taken as a suitable biological model for reconstructing paleoenvironmental scenarios. To identify the effects of Pleistocene climate changes on Pantanal’s ichthyofauna, we used genetic data from multiple populations of a top-predator long-distance migratory fish, Salminus brasiliensis. We specifically investigated whether Pleistocene climate changes affected the demography of this species. If this was the case, we expected to find changes in population size over time. Thus, we assessed the genetic diversity of S. brasiliensis to trace the demographic history of nine populations from the Upper Paraguay basin, which includes the Pantanal floodplain, that form a single genetic group, employing approximate Bayesian computation (ABC) to test five scenarios: constant population, old expansion, old decline, old bottleneck following by recent expansion, and old expansion following by recent decline. Based on two mitochondrial DNA markers, our inferences from ABC analysis, the results of Bayesian skyline plot, the implications of star-like networks, and the patterns of genetic diversity (high haplotype diversity and low-to-moderate nucleotide diversity) indicated a sudden population expansion. ABC allowed us to make strong quantitative inferences about the demographic history of S. brasiliensis. We estimated a small ancestral population size that underwent a drastic fivefold expansion, probably associated with the colonization of newly formed habitats. The estimated time of this expansion was consistent with a humid and warm phase as inferred by speleothem growth phases and travertine records during Pleistocene interglacial periods. The strong concordance between our genetic inferences and this historical data could represent the first genetic record of a humid and warm phase in the Pantanal in the period since the Last Interglacial to 40 ka.

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Section: Discussionmentioning

confidence: 99%

“…brasiliensis in the Upper Paraguay basin is unknown. Assessing the population genetic pattern of the existing species can identify how its genetic variation was affected by past climate changes and can also provide insights into its demographic response ( Pil et al, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Genetic Pattern and Demographic History of Salminus brasiliensis: Population Expansion in the Pantanal Region during the Pleistocene

et al. 2018

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“…Several approaches have been improved to analyze environmental stochastic events and evolutionary mechanisms, that are based on coalescence reconstruction and tools from computational statistics, including moment matching (Kaut & Wallace, 2003 ), population decline and growth detection (Cornuet & Luikart, 1996 ), and likelihood approaches with varying effective population sizes ( Ne of Wright, 1931 ) (Gilbert & Whitlock, 2015 ) based on contemporary and past Ne (Drummond, Rambaut, Shapiro, & Pybus, 2005 ; Waples, 1989 ; Waples & Yokota, 2007 ). These approaches have helped us to improve our knowledge about how evolutionary processes influence the life history of organisms (i.e., demographic events), in the wild (Hapeman, Latch, Rhodes, Swanson, & Kilpatrick, 2017 ; Perrier, Guyomard, Bagliniere, Nikolic, & Evanno, 2013 ; Pil et al, 2018 ). Likewise that have been recently affected by selection/anthropogenic pressures, such as rapid contemporary climate change (Crozier & Hutchings, 2014 ), habitat degradation and disconnection (Lourenço et al, 2017 ), (re)introduction of species (Hapeman et al, 2017 ), and/or stocking programs (Hansen, Fraser, Meier, & Mensberg, 2009 ).…”

Section: Introductionmentioning

confidence: 99%

Eco‐evolutionary factors that influence its demographic oscillations in Prochilodus costatus (Actinopterygii: Characiformes) populations evidenced through a genetic spatial–temporal evaluation

Ludwig

Pimentel²,

Resende

et al. 2023

Evolutionary Applications

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The human activity impact on wild animal populations is indicated by eco-evolutionary and demographic processes, along with their survival and capacity to evolve; consequently, such data can contribute toward enhancing genetic-based conservation programs. In this context, knowledge on the life-history and the eco-evolutionary processes is required to understand extant patterns of population structure in Prochilodus costatus a Neotropical migratory fish that has been threatened due to loss and fragmentation of its natural habitat since 1960s promoted by the expansion of hydroelectric power plant construction programs. This study evaluated the eco-evolutionary parameters that cause oscillations in the demography and structure of P. costatus populations. An integrated approach was used, including temporal and spatial sampling, next-generation sequencing of eight microsatellite loci, multivariate genetic analysis, and demographic life-history reconstruction. The results provided evidence of the complex interplay of ecological-evolutionary and human-interference events on the life history of this species in the upper basin. In particular, spawning wave behavior might have ecological triggers resulting in an overlapping of distinct genetic generations, and arising distinct migratory and nonmigratory genetic patterns living in the same area. An abrupt decrease in the effective population size of the P. costatus populations in the recent past (1960-80) was likely driven by environment fragmentation promoted by the construction of the Três Marias hydropower dam. The low allelic diversity that resulted from this event is still detected today; thus, active stocking programs are not effective at expanding the genetic diversity of this species in the river basin. Finally, this study highlights the importance of using mixed methods to understand spatial and temporal variation in genetic structure for effective mitigation and conservation programs for threatened species that are directly affected by human actions.

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Dams cause genetic homogenization in populations of fish that present homing behavior: Evidence from a demogenetic individual-based model

Baggio

Araújo

Ayllón

et al. 2018

Ecological Modelling

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The influence of paleoclimate on the distribution of genetic variability and demography of fishes in a large and highly fragmented neotropical river

Cited by 3 publications

References 81 publications

Genetic Pattern and Demographic History of Salminus brasiliensis: Population Expansion in the Pantanal Region during the Pleistocene

Genetic Pattern and Demographic History of Salminus brasiliensis: Population Expansion in the Pantanal Region during the Pleistocene

Eco‐evolutionary factors that influence its demographic oscillations in Prochilodus costatus (Actinopterygii: Characiformes) populations evidenced through a genetic spatial–temporal evaluation

Dams cause genetic homogenization in populations of fish that present homing behavior: Evidence from a demogenetic individual-based model

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