Impact of Pleistocene Climate on Diversification and Distribution of Congeneric Freshwater Crustacean Species DOI

Gislaine Puli,

Sandro Santos, Bianca Laís Zimmermann

и другие.

Journal of Biogeography, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

ABSTRACT Aim The climatic oscillations of the glacial–interglacial cycles significantly influenced species diversification, playing an essential role in shaping current patterns biodiversity. However, effects Pleistocene climate on diversification and their distribution are poorly understood for Southern Hemisphere some taxonomic groups, such as invertebrates. Here, we explore changes four South American freshwater crustaceans. Location America. Taxon Genus Aegla (Aeglidae). Methods We performed phylogenetic analyses, estimated genetic diversity neutrality indices alacalufi , neuquensis platensis uruguayana using nuclear mitochondrial sequences. used genes to estimate divergence times, calculate historical demography reconstruct ancestral area range. also past potential distributions ecological niche modelling. Results Although all studied had by glacial cycles, Patagonian A. which were directly ice cap, appear have benefited from lower sea levels melting glaciation ice. As was affected dry cold continent during period. Main Conclusions Our study unveils intricate interplay between fluctuations evolutionary history crustaceans Distinct phylogeographic observed . Some underwent significant due glaciation, while cold, arid conditions shaped others. These findings underscore crucial dynamics species. ecosystems confront escalating threats, our highlights urgency conservation measures continued research unveil species' adaptive mechanisms face change.

Язык: Английский

Let's get high: Cladogenesis in freshwater crabs (Decapoda: Potamonautidae: Potamonautes) supports the mountain gradient speciation hypothesis in the Cape Fold and Drakensberg Mountains, South Africa DOI Creative Commons
Savel R. Daniels, Nasreen Peer, Angus Macgregor Myburgh

и другие.

Ecology and Evolution, Год журнала: 2024, Номер 14(3)

Опубликована: Март 1, 2024

Abstract During the present study, evolutionary relationship within a clade of mountain freshwater crabs ( Potamonautes ) was examined using mtDNA sequence data for species from Cape Fold Mountain (CFM) and Great Escarpment (Drakensberg range). We undertook phylogenetic analyses, divergence time estimation, an ancestral area reconstruction to explore period cladogenesis understand biogeographic history in this high‐altitude clade. Furthermore, we applied four delimitation methods ASAP, bPTP, bGMYC, STACEY on latter Bayesian analyses retrieved monophyletic crab comprised two major sister clades, one (clade A) Drakensberg Mountains B) species. Divergence estimation indicated that clades underwent Mio/Pliocene cladogenesis. Within CFM (A), P. amathole (Amathola Mountains) parvispina (Cederberg Kouebokkeveld were parvicorpus (Cape Peninsula, Jonkershoek, Helderberg tuerkayi (Overberg brincki (Hottentots Holland Mountains). (B), observed situ diversification. Specimens southcentral (Dargle Forest, Injasuti, Karkloof, Impendle) represent new undescribed lineage sp. nov. 1. The second northern Drakensberg, representing clarus , central depressus turn baziya Eastern Province. application generally overestimated number Province is most likely range area. Ecological niche modelling representative A B demonstrated temperature rainfall abiotic drivers differentiated clades. Our favours gradient speciation hypothesis.

Язык: Английский

Процитировано

6
Perched on the Plateau: Speciation in a Cape Fold Mountain Velvet Worm Clade, With the Description of Seven New Species (Onychophora: Peripatopsidae: Peripatopsis) From South Africa DOI Creative Commons
Savel R. Daniels, Aaron Barnes

Ecology and Evolution, Год журнала: 2025, Номер 15(4)

Опубликована: Апрель 1, 2025

ABSTRACT During the present study, we re‐examined species boundaries in three mountain‐dwelling velvet worm complexes ( Peripatopsis balfouri s.l., P. bolandi s.l. and purpureus s.l .) along Cape Fold Mountains of South Africa. We obtained DNA sequence data for both mitochondrial cytochrome c oxidase subunit one COI ) nuclear 18S rRNA loci. Phylogenetic inferences were derived with use maximum likelihood Bayesian inference coupled a divergence time estimation. Four delimitation methods (ASAP, bPTP, bGYMC STACEY) together gross morphological analyses scanning electron microscopy (SEM) used to validate diagnosis novel species. Combined phylogenetic results demonstrated presence geographically discrete clades (A‐C). Corroborative evidence lineages could be from dorsal integument colour live specimens fixed ventral papilla scales rank counts. The four produced variable results. Divergence estimations indicated that Miocene epochs was major period cladogenesis. seven species, barnardi sp. nov ., fernkloofi jonkershoeki kogelbergi landroskoppie limietbergi palmeri are herein described.

Язык: Английский

Процитировано

0
Hiding in the hills: evidence for two novel mountain-dwelling freshwater crabs of Potamonautes (Decapoda: Brachyura: Potamonautidae) from South Africa DOI

K. Mengel,

Savel R. Daniels

Journal of Crustacean Biology, Год журнала: 2024, Номер 44(2)

Опубликована: Июнь 1, 2024

Abstract Specimens of freshwater crabs (PotamonautesMacLeay, 1838) collected from mountainous regions in the Limpopo and Mpumalanga provinces South Africa could not be assigned to species level possibly represented novel lineages. The phylogenetic placement these two potential lineages were investigated with use DNA sequence data three mitochondrial loci (cytochrome oxidase c subunit one - COI, 12S rRNA, 16S rRNA) nuclear locus (histone 3 (H3)), using a maximum likelihood Bayesian Inference approach incorporating all Potamonautes described southern Africa. In addition, divergence time estimation was undertaken on tree topology determine timing cladogenesis. Morphometric analyses also conducted undescribed co-distributed, phylogenetically closely-related (P. flavusjoDaniels, Phiri & Bayliss, 2014 P. mariepskoppieDaniels, Barnes, Marais Gouws, 2021) discriminant function carapace pereiopod variables. Phylogenetic results revealed that are sister groups related clade endemic subtropical present north-eastern Africa, while indicates Mio/Pliocene morphometric corroborate distinction between co-distributed species. wolkbergin. sp. aurantiusn. compared other congeneric African taxa.

Язык: Английский

Процитировано

2
Generalist species exhibit more genetic structure in comparison to a habitat specialist: Evidence from a phylogeographic study of two freshwater crabs (Decapoda: Potamonautidae: Potamonautes), implications for habitat conservation DOI Creative Commons
Petrus C. J. Grobler, Savel R. Daniels

Ecology and Evolution, Год журнала: 2024, Номер 14(9)

Опубликована: Сен. 1, 2024

During the present study, phylogeography of wetland specialist, freshwater crab,

Язык: Английский

Процитировано

0
Plio/Pleistocene-induced climatic oscillations drive cladogenesis in a high-altitude freshwater crab, Potamonautes mariepskoppie (Decapoda: Potamonautidae), in South Africa DOI Creative Commons
Kallyn G R Gunkel, Savel R. Daniels

Biological Journal of the Linnean Society, Год журнала: 2024, Номер 143(3)

Опубликована: Окт. 10, 2024

Abstract In this study, we explored the phylogeographical history of mountain-dwelling freshwater crab Potamonautes mariepskoppie to understand evolutionary processes and identify possible hidden lineages. DNA sequence data from mitochondrial loci (COI, 12S rRNA, 16S rRNA) a nuclear locus (histone 3) were analysed using both maximum likelihood Bayesian inference. Species delimitation was tested with four methods: ASAP, bPTP, bGMYC, STACEY. Divergence time estimation ecological niche modelling ENMEval Maxent used study species distribution elucidate abiotic factors affecting evolution. Phylogenetic analyses showed three distinct clades, corresponding geographical regions: Limpopo, Mpumalanga, Mount Sheba. These clades had no shared haplotypes exhibited moderate genetic differentiation. estimates indicated that these diverged during Plio/Pleistocene, period significant climatic shifts in southern Africa. All methods consistently supported recognition as species; however, discriminant function carapace characteristics overlap between clades. Ecological rainfall is key factor distribution. The present highlights need for further investigation high-elevation plateaus throughout Limpopo because fine-scale sampling might unmask considerable hitherto-undocumented biodiversity.

Язык: Английский

Процитировано

0
Impact of Pleistocene Climate on Diversification and Distribution of Congeneric Freshwater Crustacean Species DOI

Gislaine Puli,

Sandro Santos, Bianca Laís Zimmermann

и другие.

Journal of Biogeography, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

ABSTRACT Aim The climatic oscillations of the glacial–interglacial cycles significantly influenced species diversification, playing an essential role in shaping current patterns biodiversity. However, effects Pleistocene climate on diversification and their distribution are poorly understood for Southern Hemisphere some taxonomic groups, such as invertebrates. Here, we explore changes four South American freshwater crustaceans. Location America. Taxon Genus Aegla (Aeglidae). Methods We performed phylogenetic analyses, estimated genetic diversity neutrality indices alacalufi , neuquensis platensis uruguayana using nuclear mitochondrial sequences. used genes to estimate divergence times, calculate historical demography reconstruct ancestral area range. also past potential distributions ecological niche modelling. Results Although all studied had by glacial cycles, Patagonian A. which were directly ice cap, appear have benefited from lower sea levels melting glaciation ice. As was affected dry cold continent during period. Main Conclusions Our study unveils intricate interplay between fluctuations evolutionary history crustaceans Distinct phylogeographic observed . Some underwent significant due glaciation, while cold, arid conditions shaped others. These findings underscore crucial dynamics species. ecosystems confront escalating threats, our highlights urgency conservation measures continued research unveil species' adaptive mechanisms face change.

Язык: Английский

Процитировано

0