The southwestern <scp>C</scp>arpathians as an ancient centre of diversity of freshwater gammarid amphipods: insights from the <i><scp>G</scp>ammarus fossarum</i> species complex

Copilaş‐Ciocianu, Denis; Petrusek, Adam

doi:10.1111/mec.13286

Cited by 64 publications

(92 citation statements)

References 78 publications

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“…There was a substantial lag in the application of tree‐based methods. The generalized mixed Yule‐coalescent (Pons et al., ), multilocus coalescent (Rannala & Yang, ; Yang & Rannala, ) and Poisson tree process models (Zhang et al., ) were used in only seven studies (Copilaş‐Ciocianu & Petrusek, ; Esmaeili‐Rineh, Sari, Delić, Moškrič, & Fišer, ; Katouzian et al., ; King & Leys, ; Murphy, King, & Delean, ; Weiss, Niklas, Anna, & Florian, ; Yang et al., ). This lag in the use of tree‐based methods occurred despite 78% of the studies inferring molecular phylogenies (supporting information ).…”

Section: Taxonomic Practices In Delimiting Cryptic Speciesmentioning

confidence: 99%

“…Alternative species delimitations suggested by different methods were not in conflict with each other, but differed in the degree of splitting; distance methods typically turned to be more conservative (Copilaş‐Ciocianu & Petrusek, ; Delić, Trontelj, Rendoš, & Fišer, ; Delić, Švara, et al., ; Eme et al., ; Katouzian et al., ; Weiss et al., ). In such cases, authors either provided a rough estimate of species number (Copilaş‐Ciocianu & Petrusek, ; Weiss et al., ), opted for a particular species hypothesis by ranking the efficiency of different methods (e.g., conservative ABGD was preferred over PTP and bGMYC; Katouzian et al., ), reconsidered the results within spatial context (presence of syntopy (Delić, Trontelj, et al., )) or drew on other studies to justify the choice of a particular threshold value. Unfortunately, cross‐referencing is not always appropriate because the value of thresholds depend on how genetic distances are calculated (e.g., uncorrected p, K2P, patristic distances) (Richards et al., ).…”

Section: Taxonomic Practices In Delimiting Cryptic Speciesmentioning

confidence: 99%

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Cryptic species as a window into the paradigm shift of the species concept

2018

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The species concept is the cornerstone of biodiversity science, and any paradigm shift in the delimitation of species affects many research fields. Many biologists now are embracing a new "species" paradigm as separately evolving populations using different delimitation criteria. Individual criteria can emerge during different periods of speciation; some may never evolve. As such, a paradigm shift in the species concept relates to this inherent heterogeneity in the speciation process and species category-which is fundamentally overlooked in biodiversity research. Cryptic species fall within this paradigm shift: they are continuously being reported from diverse animal phyla but are poorly considered in current tests of ecological and evolutionary theory. The aim of this review is to integrate cryptic species in biodiversity science. In the first section, we address that the absence of morphological diversification is an evolutionary phenomenon, a "process" counterpart to the long-studied mechanisms of morphological diversification. In the next section regarding taxonomy, we show that molecular delimitation of cryptic species is heavily biased towards distance-based methods. We also stress the importance of formally naming of cryptic species for better integration into research fields that use species as units of analysis. Finally, we show that incorporating cryptic species leads to novel insights regarding biodiversity patterns and processes, including large-scale biodiversity assessments, geographic variation in species distribution and species coexistence. It is time for incorporating multicriteria species approaches aiming to understand speciation across space and taxa, thus allowing integration into biodiversity conservation while accommodating for species uncertainty.

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Section: Taxonomic Practices In Delimiting Cryptic Speciesmentioning

confidence: 99%

Section: Taxonomic Practices In Delimiting Cryptic Speciesmentioning

confidence: 99%

Cryptic species as a window into the paradigm shift of the species concept

2018

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“…Furthermore, this detailed study revealed a 20% higher ostracod diversity than had been previously reported from Romania. Using molecular markers, Copilaş‐Ciocianu & Petrusek () were able to distinguish 16 new microendemic taxa in the freshwater Gammarus fossarum species complex (Crustacea: Amphipoda) sampled across a very small area of the Apuseni and Retezat Mountains. This high diversity had been unrecognized from conventional morphological approaches (Copilaș‐Ciocianu et al ., ).…”

Section: The Carpathians As a Biodiversity Hotspotmentioning

confidence: 99%

“…This high diversity had been unrecognized from conventional morphological approaches (Copilaș‐Ciocianu et al ., ). Importantly, the dated phylogeny suggests a very old, Tertiary divergence of the Carpathian lineages (Table ), probably triggered by intense geological subsidence of the former highland region (‘Tisza land’), resulting in the formation of the Pannonian basin and the Apuseni Mountains (Copilaş‐Ciocianu & Petrusek, ). A molecular study by Meleg et al .…”

Section: The Carpathians As a Biodiversity Hotspotmentioning

confidence: 99%

Biogeography of the Carpathians: evolutionary and spatial facets of biodiversity

Mráz

Ronikier

2016

Biol. J. Linn. Soc.

123

105

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The Carpathians are the largest mountain range in Central Europe. Their geographical position, extent, isolation, landscape heterogeneity, well‐preserved environment, and relatively low impact of Quaternary glaciations make them of utmost importance for studies on European biodiversity and biogeography. In this review, introducing a Special Issue of the Biological Journal of the Linnean Society, we provide an overview of current research and focus on three main aspects: (1) distribution patterns and species richness including endemism; (2) phylogeographical patterns, inference of major barriers, and divergence areas; and (3) cytological studies and cytogeography inferred from vascular plant polyploid complexes. Our survey shows that, although accurate estimation is not possible for several important taxonomic entities because of unavailable or dispersed data, the Carpathians are a clear hotspot of European diversity for many groups of organisms, such as mammals, breeding birds, amphibians, lichens, and vascular plants. Certain groups, not necessarily those with high species richness, are rich in endemic taxa. This holds mainly for subterranean invertebrates, molluscs, grasshoppers, beetles, spiders, and vascular plants. Distribution patterns of endemic richness vary across taxonomic groups, as well as geographically, reflecting both history and habitat features. In general, the South‐Eastern Carpathians have a significantly higher proportion of endemic taxa than the northerly‐situated Western Carpathians. Molecular clock‐based estimations have provided some insight into the diversification age of the Carpathian biota, including a Tertiary origin for some endemic taxa and lineages, especially those confined to environmentally stable habitats. Distribution patterns, as well as phylogeographical and phylogenetic data, corroborate the persistence of many high‐mountain and forest taxa during the Quaternary climatic oscillations, often in multiple spatially delimited areas isolated by physical barriers. Several studies show that the Carpathian massifs played an important role as refugia for rare lineages and/or as stepping stones in migrations. Phylogeographical analysis reveals clear patterns of biogeographical breaks, as well as links, although clear exceptions also confirm that extant distribution patterns are often shaped more by idiosyncratic processes acting at different geological times. Cytogeographical data also uncover several consistent patterns, which probably reflect a deeper evolutionary history. In conclusion, the available data highlight the unique position of the Carpathians in the evolution and preservation of European biota within the European Alpine System.

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“…; Wysocka et al . ; Copilaş‐Ciocianu & Petrusek ) have shown that such diversification could have started even more than 15 million years ago (Ma) and suggested the ancient pre‐Pleistocene origin of the cryptic Gammarus species was followed by an unexpectedly long and dynamic evolutionary history, despite morphological stasis. Finally, studies by Hou et al .…”

Section: Introductionmentioning

confidence: 99%

The legacy of a vanished sea: a high level of diversification within a European freshwater amphipod species complex driven by 15 My of Paratethys regression

et al. 2016

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The formation of continental Europe in the Neogene was due to the regression of the Tethys Ocean and of the Paratethys Sea. The dynamic geology of the area and repetitious transitions between marine and freshwater conditions presented opportunities for the colonization of newly emerging hydrological networks and diversification of aquatic biota. Implementing mitochondrial and nuclear markers in conjunction with a large-scale sampling strategy, we investigated the impact of this spatiotemporal framework on the evolutionary history of a freshwater crustacean morphospecies. The Gammarus balcanicus species complex is widely distributed in the area previously occupied by the Paratethys Sea. Our results revealed its high diversification and polyphyly in relation to a number of other morphospecies. The distribution of the studied amphipod is generally characterized by very high local endemism and divergence. The Bayesian time-calibrated reconstruction of phylogeny and geographical distribution of ancestral nodes indicates that this species complex started to diversify in the Early Miocene in the central Balkans, partially in the shallow epicontinental sea. It is possible that there were several episodes of inland water colonization by local brackish water lineages. Subsequent diversification within clades and spread to new areas could have been induced by Alpine orogeny in the Miocene/Pliocene and, finally, by Pleistocene glaciations. The present distribution of clades, in many cases, still reflects Miocene palaeogeography of the area. Our results point out that investigations of the historical aspect of cryptic diversity in other taxa may help in a general understanding of the origins of freshwater invertebrate fauna of Europe.

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The southwestern Carpathians as an ancient centre of diversity of freshwater gammarid amphipods: insights from the Gammarus fossarum species complex

Cited by 64 publications

References 78 publications

Cryptic species as a window into the paradigm shift of the species concept

Cryptic species as a window into the paradigm shift of the species concept

Biogeography of the Carpathians: evolutionary and spatial facets of biodiversity

The legacy of a vanished sea: a high level of diversification within a European freshwater amphipod species complex driven by 15 My of Paratethys regression

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