Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta)
We present an integrative molecular and morphological study of subaquatic representatives of the genus Pseudohygrohypnum (Pylaisiaceae, Bryophyta), supplemented by distribution modelling of the revealed phylogenetic lineages. Phylogenetic analyses of nuclear and plastid datasets combined with the as...
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
PeerJ Inc.
2022-04-01
|
| Series: | PeerJ |
| Subjects: | |
| Online Access: | https://peerj.com/articles/13260.pdf |
| _version_ | 1797419461519605760 |
|---|---|
| author | Vladimir E. Fedosov Anna V. Shkurko Alina V. Fedorova Elena A. Ignatova Evgeniya N. Solovyeva John C. Brinda Michael S. Ignatov Jan Kučera |
| author_facet | Vladimir E. Fedosov Anna V. Shkurko Alina V. Fedorova Elena A. Ignatova Evgeniya N. Solovyeva John C. Brinda Michael S. Ignatov Jan Kučera |
| author_sort | Vladimir E. Fedosov |
| collection | DOAJ |
| description | We present an integrative molecular and morphological study of subaquatic representatives of the genus Pseudohygrohypnum (Pylaisiaceae, Bryophyta), supplemented by distribution modelling of the revealed phylogenetic lineages. Phylogenetic analyses of nuclear and plastid datasets combined with the assemble species by automatic partitioning (ASAP) algorithm revealed eight distinct species within the traditionally circumscribed P. eugyrium and P. subeugyrium. These species are therefore yet another example of seemingly widely distributed taxa that harbour molecularly well-differentiated lineages with narrower distribution ranges. Studied accessions that were previously assigned to P. eugyrium form three clearly allopatric lineages, associated with temperate regions of Europe, eastern North America and eastern Asia. Remarkably, accessions falling under the current morphological concept of P. subeugyrium were shown to be even more diverse, containing five phylogenetic lineages. Three of these lineages occur under harsh Asian continental climates from cool-temperate to Arctic regions, while the remaining two, referred to P. subeugyrium s.str. and P. purpurascens, have more oceanic North Atlantic and East Asian distributions. Niche identity and similarity tests suggested no similarity in the distributions of the phylogenetically related lineages but revealed the identity of two East Asian species and the similarity of two pairs of unrelated species. A morphological survey confirmed the distinctness of all eight phylogenetic lineages, requiring the description of five new species. Pseudohygrohypnum appalachianum and P. orientale are described for North American and East Asian plants of P. eugyrium s.l., while P. sibiricum, P. subarcticum and P. neglectum are described for the three continental, predominantly Asian lineages of P. subeugyrium s.l. Our results highlight the importance of nontropical Asia as a center of bryophyte diversity. Phylogenic dating suggests that the diversification of subaquatic Pseudohygrohypnum lineages appeared in late Miocene, while mesophilous species of the genus split before Miocene cooling, in climatic conditions close to those where the ancestor of Pseudohygrohypnum appeared. We speculate that radiation of the P. subeugyrium complex in temperate Asia might have been driven by progressive cooling, aridification, and increases in seasonality, temperature and humidity gradients. Our results parallel those of several integrative taxonomic studies of North Asian mosses, which have resulted in a number of newly revealed species. These include various endemics from continental areas of Asia suggesting that the so-called Rapoport’s rule of low diversity and wide distribution range in subpolar regions might not be applicable to bryophytes. Rather, the strong climatic oscillations in these regions may have served as a driving force of speciation and niche divergence. |
| first_indexed | 2024-03-09T06:47:38Z |
| format | Article |
| id | doaj.art-d32183fc91d64aa8a221c8982d5064c3 |
| institution | Directory Open Access Journal |
| issn | 2167-8359 |
| language | English |
| last_indexed | 2024-03-09T06:47:38Z |
| publishDate | 2022-04-01 |
| publisher | PeerJ Inc. |
| record_format | Article |
| series | PeerJ |
| spelling | doaj.art-d32183fc91d64aa8a221c8982d5064c32023-12-03T10:33:12ZengPeerJ Inc.PeerJ2167-83592022-04-0110e1326010.7717/peerj.13260Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta)Vladimir E. Fedosov0Anna V. Shkurko1Alina V. Fedorova2Elena A. Ignatova3Evgeniya N. Solovyeva4John C. Brinda5Michael S. Ignatov6Jan Kučera7Botanical Garden-Institute, FEB RAS, Vladivostok, RussiaTsitsin Main Botanical Garden of RAS, Moscow, RussiaTsitsin Main Botanical Garden of RAS, Moscow, RussiaBiological Faculty, Lomonosov Moscow State University, Moscow, RussiaZoological Museum of Lomonosov Moscow State University, Moscow, RussiaMissouri Botanical Garden, St. Louis, MO, USABiological Faculty, Lomonosov Moscow State University, Moscow, RussiaFaculty of Science, Department of Botany, University of South Bohemia, České Budějovice, Czech RepublicWe present an integrative molecular and morphological study of subaquatic representatives of the genus Pseudohygrohypnum (Pylaisiaceae, Bryophyta), supplemented by distribution modelling of the revealed phylogenetic lineages. Phylogenetic analyses of nuclear and plastid datasets combined with the assemble species by automatic partitioning (ASAP) algorithm revealed eight distinct species within the traditionally circumscribed P. eugyrium and P. subeugyrium. These species are therefore yet another example of seemingly widely distributed taxa that harbour molecularly well-differentiated lineages with narrower distribution ranges. Studied accessions that were previously assigned to P. eugyrium form three clearly allopatric lineages, associated with temperate regions of Europe, eastern North America and eastern Asia. Remarkably, accessions falling under the current morphological concept of P. subeugyrium were shown to be even more diverse, containing five phylogenetic lineages. Three of these lineages occur under harsh Asian continental climates from cool-temperate to Arctic regions, while the remaining two, referred to P. subeugyrium s.str. and P. purpurascens, have more oceanic North Atlantic and East Asian distributions. Niche identity and similarity tests suggested no similarity in the distributions of the phylogenetically related lineages but revealed the identity of two East Asian species and the similarity of two pairs of unrelated species. A morphological survey confirmed the distinctness of all eight phylogenetic lineages, requiring the description of five new species. Pseudohygrohypnum appalachianum and P. orientale are described for North American and East Asian plants of P. eugyrium s.l., while P. sibiricum, P. subarcticum and P. neglectum are described for the three continental, predominantly Asian lineages of P. subeugyrium s.l. Our results highlight the importance of nontropical Asia as a center of bryophyte diversity. Phylogenic dating suggests that the diversification of subaquatic Pseudohygrohypnum lineages appeared in late Miocene, while mesophilous species of the genus split before Miocene cooling, in climatic conditions close to those where the ancestor of Pseudohygrohypnum appeared. We speculate that radiation of the P. subeugyrium complex in temperate Asia might have been driven by progressive cooling, aridification, and increases in seasonality, temperature and humidity gradients. Our results parallel those of several integrative taxonomic studies of North Asian mosses, which have resulted in a number of newly revealed species. These include various endemics from continental areas of Asia suggesting that the so-called Rapoport’s rule of low diversity and wide distribution range in subpolar regions might not be applicable to bryophytes. Rather, the strong climatic oscillations in these regions may have served as a driving force of speciation and niche divergence.https://peerj.com/articles/13260.pdfBiogeographyCryptic diversityAllopatryHypnalesDisjunctive distributionSpecies distribution model |
| spellingShingle | Vladimir E. Fedosov Anna V. Shkurko Alina V. Fedorova Elena A. Ignatova Evgeniya N. Solovyeva John C. Brinda Michael S. Ignatov Jan Kučera Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta) PeerJ Biogeography Cryptic diversity Allopatry Hypnales Disjunctive distribution Species distribution model |
| title | Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta) |
| title_full | Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta) |
| title_fullStr | Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta) |
| title_full_unstemmed | Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta) |
| title_short | Need for split: integrative taxonomy reveals unnoticed diversity in the subaquatic species of Pseudohygrohypnum (Pylaisiaceae, Bryophyta) |
| title_sort | need for split integrative taxonomy reveals unnoticed diversity in the subaquatic species of pseudohygrohypnum pylaisiaceae bryophyta |
| topic | Biogeography Cryptic diversity Allopatry Hypnales Disjunctive distribution Species distribution model |
| url | https://peerj.com/articles/13260.pdf |
| work_keys_str_mv | AT vladimirefedosov needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT annavshkurko needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT alinavfedorova needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT elenaaignatova needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT evgeniyansolovyeva needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT johncbrinda needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT michaelsignatov needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta AT jankucera needforsplitintegrativetaxonomyrevealsunnoticeddiversityinthesubaquaticspeciesofpseudohygrohypnumpylaisiaceaebryophyta |