Perspectives on the Grey Zone of Species Delimitation With Notes on Invertebrates in the Marine Environment

Bulletin of the Society of Systematic Biologists, Journal Year: 2023, Volume and Issue: 2(2), P. 1 - 23

Published: Oct. 4, 2023

Defining species boundaries, or delimiting species, is a complex and often difficult task. Indeed, when such studies incorporate approaches that consider evolutionary mechanisms, there much to be learned about diversity how the processes play critical roles in speciation can impact delineation. In 2021, virtual workshop on delimitation was held at Smithsonian Institution National Museum of Natural History train natural history scientists taxonomists appropriate analytical tools used help delimit using molecular data. This perspective highlights some main themes discussed during while detailing three challenge any study. Specifically, we discuss incomplete lineage sorting, gene flow, population structure boundaries We highlight empirical methodological have successfully met these challenges under various scenarios. Finally, provide recommendations considerations for undertaking variety taxa. To this end, recommend fully embrace process-based delimitation, which important insights into their study systems. For those developing approaches, hope they incorporating less well-known taxa, as marine invertebrates, method testing. Marine invertebrates encompass many dark taxa across tree life yet represent majority animal phyla, are vulnerable extinction due global ocean change. Thus, advancing address taxonomic revisions organisms will support conservation decisions keystone ecosystems. Furthermore, strategies, lack obvious barriers flow environment, occurrence isolated habitat patches better inform our knowledge role generating nature.

Language: Английский

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Comparative transcriptomes reveal the disjunction adaptive strategy of Thuja species in East Asia and North America

Journal of Forestry Research, Journal Year: 2023, Volume and Issue: 34(6), P. 1963 - 1974

Published: Sept. 13, 2023

Language: Английский

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A Cautionary Note on Using STRUCTURE to Detect Hybridization in a Phylogenetic Context

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 8, 2024

Abstract Population genetic clustering methods are widely used to detect hybridization events between closely related populations within species, as well deeply diverged lineages across phylogenetic time-scales, although their strengths and limitations in the latter cases remain poorly explored. This study presents first systematic evaluation of performance most popular population method, STRUCTURE, under a variety cross-species scenarios, including hybrid speciation, introgression involving ghost (i.e., extinct or unsampled) otherwise. Our simulations demonstrate that STRUCTURE performs identifying hybrids parental donors only when admixture happens very recently sampled extant lineages. However, generally fails signals occurs deep time gene flow stems from We find symmetrical contribution speciation will often be revealed extremely asymmetrical especially event occurred more than some ago. results suggest population-genetic may inefficient for detecting either ancient admixtures, partly explaining why has escaped attention evolutionary biologists until recently.

Language: Английский

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Phylogenomic Analyses of the Pantropical Platycerium Desv. (Platycerioideae) Reveal Their Complex Evolution and Historical Biogeography

Published: Jan. 1, 2024

Download This Paper Open PDF in Browser Add to My Library Share: Permalink Using these links will ensure access this page indefinitely Copy URL DOI

Language: Английский

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Morphological characteristics and systematic position of Allium guanxianense, an endemic species from Sichuan, China

Journal of Asia-Pacific Biodiversity, Journal Year: 2024, Volume and Issue: 18(1), P. 6 - 13

Published: June 20, 2024

The research examined the chloroplast genome structure and evolutionary relationships of Allium guanxianense. cp spans 152,480 bp comprises a large single copy region (82,305 bp, 53.98% length ratio), small (18,353 12.04%), two inverted repeat sequences (25,911 16.99%). A total 132 genes were identified within A. guanxianense, including 86 protein-coding (PCGs), 38 tRNAs, 8 rRNAs. Its is basically consistent with other species sect. Bromatorrhiza, only difference being distributions ndhF rpl22 at IR region. codon usage bias analysis for PCGs revealed that mutation pressure drives preference in species. Phylogenetic 35 showed genus can be divided into three major lineages, guanxianense positioned top Bromatorrhiza first lineage, forming well-supported sister clade omeiense. Our study presents, time, morphological characteristics features analyzes its relationship closely related This significant importance classification, phylogeny, conservation this narrowly distributed endemic

Language: Английский

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