Molecular and morphological studies on the<i>Didymodon tophaceus</i>complex

Werner, Olaf; Köckinger, Heribert; Jiménez, Juan A.; Ros, Rosa M.

doi:10.1080/11263500903226965

Cited by 16 publications

(16 citation statements)

References 14 publications

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“…icmadophilus occurs only in Inner Mongolia [ 18 ]. Currently, researchers studying Didymodon are paying close attention to its taxonomic [ 19 , 20 ], systematic [ 21 ], and morphological characters [ 22 , 23 ], but few are conducting research on the distribution of Didymodon with a consideration of habits and environmental variables at large scales.…”

Section: Introductionmentioning

confidence: 99%

Impacts of Environmental Heterogeneity on Moss Diversity and Distribution of Didymodon (Pottiaceae) in Tibet, China

et al. 2015

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Tibet makes up the majority of the Qinghai-Tibet Plateau, often referred to as the roof of the world. Its complex landforms, physiognomy, and climate create a special heterogeneous environment for mosses. Each moss species inhabits its own habitat and ecological niche. This, in combination with its sensitivity to environmental change, makes moss species distribution a useful indicator of vegetation alteration and climate change. This study aimed to characterize the diversity and distribution of Didymodon (Pottiaceae) in Tibet, and model the potential distribution of its species. A total of 221 sample plots, each with a size of 10 × 10 m and located at different altitudes, were investigated across all vegetation types. Of these, the 181 plots in which Didymodon species were found were used to conduct analyses and modeling. Three noteworthy results were obtained. First, a total of 22 species of Didymodon were identified. Among these, Didymodon rigidulus var. subulatus had not previously been recorded in China, and Didymodon constrictus var. constrictus was the dominant species. Second, analysis of the relationships between species distributions and environmental factors using canonical correspondence analysis revealed that vegetation cover and altitude were the main factors affecting the distribution of Didymodon in Tibet. Third, based on the environmental factors of bioclimate, topography and vegetation, the distribution of Didymodon was predicted throughout Tibet at a spatial resolution of 1 km, using the presence-only MaxEnt model. Climatic variables were the key factors in the model. We conclude that the environment plays a significant role in moss diversity and distribution. Based on our research findings, we recommend that future studies should focus on the impacts of climate change on the distribution and conservation of Didymodon.

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Section: Introductionmentioning

confidence: 99%

Impacts of Environmental Heterogeneity on Moss Diversity and Distribution of Didymodon (Pottiaceae) in Tibet, China

et al. 2015

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“…Tubers are known to occur in a number species of the genus, but in D. tomaculosus they are abundant and characteristically sausage shaped. D. tomaculosus is a very rare species and it was known only from British Isles and cited from one site in the south of Germany only (Jimenez et al 2005, Werner et al 2009. Apparently, this report contributes a remarkable distributional gap of this species towards Asia.…”

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confidence: 75%

Didymodon tomaculosus (Blockeel) M.F.V.Corley, new to the moss flora of Turkey and Asia

Canlı

Çetin

2013

Bangladesh J. Bot.

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Didymodon tomaculosus (Blockeel) M.F.V.Corley is reported for the first time from Turkey, bringing the total number of Didymodon species known from Turkey to 19. D. tomaculosus is also reported first time to the moss flora of Asia. It is a very rare species and was known only from British Isles and south of Germany. Description, illustrations and diagnostic characters of the species are given, together with notes on its ecology. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13445 Bangladesh J. Bot. 41(2): 177-179, 2012 (December)

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“…A metadata study has been conducted by Zander (2019b) of the number of molecular strains per species in the Pottiaceae (these all termed "races" in that study). The data for this study was based on several recent publications (Alonso et al, 2016;Cano et al, 2009;Grundmann et al, 2006;Köckinger et al, 2010;Kučera, Ignatov, 2015;Kučera et al, 2013Kučera et al, , 2018Werner et al, 2005Werner et al, , 2009Werner et al, , 2014. Molecular strains were inferred when two exemplars of the same species share at minimum one trait not shared by a third exemplar of the same species, i.e., an internal node with two exemplars terminal and one more basal.…”

Section: Past Evidence From Inspection Of Published Cladogramsmentioning

confidence: 99%

Infraspecific molecular trees are associated with serial macroevolution in Pottiaceae (Bryophyta)

Zander¹

2019

Ukr.Bot.J.

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The analytic orientation of this paper is intended as a replacement for the antiquated but still prevalent phylogenetic inferential models and techniques of the late 20 th сentury that are focused entirely on shared descent. Serial descent, that is, progenitor to descendant, may occur at the species or infraspecies level. In molecular systematics, species level paraphyly occurs when two examples of the same species are separated on a cladogram by a second species. This implies linear macroevolution of the second species from the first. Molecular cladograms often show cladistic structure (branching) among examples of the same species. If well-supported, such indicates a potential for evolution. A range of infraspecific and intraspecific cladistic structure in species of Pottiaceae (Bryophyta) was demonstrated in previously published molecular cladograms and data sets of other authors. This includes well-supported cladistic structure of molecular strains, and well-supported paraphyly involving other species. Large numbers of base pair changes among strains are considered here evidence of evolvability and increasing age of a species. Infraspecific strains are apparently lost in older species through speciation and extinction. Cluster analysis using DNA metadata of Oxystegus species matched published molecular cladograms to a large extent. The fact that apparent molecular strains are present in both nonparaphyletic and paraphyletic species, about half the species studied, shore up the theory that internal racial differentiation at the molecular level leads to or signals serial descent of multiple extant morphotaxa. It is because much infraspecific molecular cladistic structure exists that newly speciated taxa are already strongly cladistically dichotomized. Thus, the ultimate source of molecular paraphyly is internal to each species, and does not imply polyphyly by convergent species or cryptic taxa. Molecular systematics cannot effectively model progenitor-descendant radiation. Species with many strains are potential sources of future biological diversity. Recognition of differential evolvability may allow facilitation of complex, interactive, diverse ecosystems successfully tracking climate change.

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Molecular and morphological studies on theDidymodon tophaceuscomplex

Cited by 16 publications

References 14 publications

Impacts of Environmental Heterogeneity on Moss Diversity and Distribution of Didymodon (Pottiaceae) in Tibet, China

Impacts of Environmental Heterogeneity on Moss Diversity and Distribution of Didymodon (Pottiaceae) in Tibet, China

Didymodon tomaculosus (Blockeel) M.F.V.Corley, new to the moss flora of Turkey and Asia

Infraspecific molecular trees are associated with serial macroevolution in Pottiaceae (Bryophyta)

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