An ecological barrier between the Himalayas and the Hengduan Mountains maintains the disjunct distribution of Roscoea

2019 ◽  
Vol 47 (2) ◽  
pp. 326-341 ◽  
Author(s):  
De‐Bao Li ◽  
Xiao‐Kun Ou ◽  
Jian‐Li Zhao ◽  
Qing‐Jun Li
Keyword(s):  
Disjunct Distribution ◽  
Hengduan Mountains ◽  
Ecological Barrier

scholarly journals Evolutionary response to the Qinghai-Tibetan Plateau uplift: phylogeny and biogeography ofAmmopiptanthusand tribe Thermopsideae (Fabaceae)

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3607 ◽  
Author(s):  
Wei Shi ◽  
Pei-Liang Liu ◽  
Lei Duan ◽  
Bo-Rong Pan ◽  
Zhi-Hao Su
Keyword(s):  
Tibetan Plateau ◽  
Common Ancestor ◽  
Sequence Data ◽  
Disjunct Distribution ◽  
Hengduan Mountains ◽  
Plateau Uplift ◽  
Evolutionary Response ◽  
Nuclear Its ◽  
Tibetan Plateau Uplift ◽  
The Common

Previous works resolved diverse phylogenetic positions for genera of the Fabaceae tribe Thermopsideae, without a thoroughly biogeography study. Based on sequence data from nuclear ITS and four cpDNA regions (matK,rbcL,trnH-psbA,trnL-trnF) mainly sourced from GenBank, the phylogeny of tribe Thermopsideae was inferred. Our analyses support the genera of Thermopsideae, with the exclusion ofPickeringia, being merged into a monophyletic Sophoreae. Genera of Sophoreae were assigned into the Thermopsoid clade and Sophoroid clade. Monophyly ofAnagyris,BaptisiaandPiptanthuswere supported in the Thermopsoid clade. However, the genera Thermopsis and Sophora were resolved to be polyphyly, which require comprehensive taxonomic revisions. Interestingly,Ammopiptanthus, consisting ofA. mongolicusandA. nanus, nested within the Sophoroid clade, withSalweeniaas its sister.AmmopiptanthusandSalweeniahave a disjunct distribution in the deserts of northwestern China and the Hengduan Mountains, respectively. Divergence age was estimated based on the ITS phylogenetic analysis. Emergence of the common ancestor ofAmmopiptanthusandSalweenia, divergence between these two genera and the split ofAmmopiptanthusspecies occurred at approximately 26.96 Ma, 4.74 Ma and 2.04 Ma, respectively, which may be in response to the second, third and fourth main uplifts of the Qinghai-Tibetan Plateau, respectively.

A taxonomical revision of Ilex (Aquifoliaceae) in the Pan-Himalaya and unraveling its distribution patterns

Phytotaxa ◽  
2015 ◽  
Vol 230 (2) ◽  
pp. 151 ◽  
Author(s):  
De-Yuan HONG
Keyword(s):  
New Species ◽  
Taxonomic Revision ◽  
Distribution Patterns ◽  
Disjunct Distribution ◽  
Hengduan Mountains ◽  
Field Observations ◽  
Taxonomical Revision ◽  
One New Species

All relevant specimens of the genus Ilex in 11 major herbaria: B, BM, CDBI, E, K, KUN, P, PE, SZ, W, WU, in addition to A (types), were critically examined. Field observations were conducted in E Himalaya (Bomi, Mêdog, and Zayü of Tibet) and the Hengduan Mountains (Tengchong, Yunnan). As a result of this taxonomic revision, 14 species and 12 varieties are reduced to synonyms and one species is reduced to a subspecies; one species, I. shweliensis, is restored with reservation; one new species, I. gansuensis, is described from SE Gansu, while records of five species supposedly present in the Pan-Himalaya are found to be due to misidentification or mislocation by previous authors. Thus 41 species are recognized in the Pan-Himalaya, not 60 species as reported in the literature. A key to these 41 species is presented. The types of six names are designated here. In addition, noteworthy disjunct distribution patterns are shown for four species.

scholarly journals SALVIA SUBVIOLACEA, A NEW SPECIES FROM THE HIMALAYAS–HENGDUAN MOUNTAINS, CHINA

2021 ◽  
Vol 78 ◽  
pp. 1-9
Author(s):  
Yukun K Wei ◽  
Colin A Pendry ◽  
YanBo Huang ◽  
BinJie Ge ◽  
HanWen Xiao
Keyword(s):  
New Species ◽  
Iucn Red List ◽  
Red List ◽  
Disjunct Distribution ◽  
Similar Species ◽  
Hengduan Mountains ◽  
Conservation Assessment ◽  
Conservation Measures ◽  
A New Species

Salvia subviolacea Y.K.Wei & Pendry, a new species from China, is described. Salvia subviolacea belongs to Salvia subg. Glutinaria (Raf.) G.X.Hu, C.L.Xiang & B.T.Drew, sect. Eurysphace E.Peter, and is distinguished from morphologically similar species by differences in its habit, leaves, inflorescences and flowers. It has a disjunct distribution in Sichuan and Xizang, and its IUCN Red List conservation assessment is Endangered. The Xizang population is under extreme threat and rapid conservation measures need to be taken.

Problems of species and the features of geographical distribution in colonial volvocine algae (Chlorophyta)

2020 ◽  
Vol 54 (2) ◽  
pp. 299-311
Author(s):  
A. G. Desnitskiy
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
World Literature ◽  
The Other ◽  
Disjunct Distribution ◽  
Published Data ◽  
Species Problem ◽  
Comprehensive Review ◽  
Volvocine Algae ◽  
Cryptic Taxa

More than ten new species of colonial volvocine algae were described in world literature during recent years. In present review, the published data on taxonomy, geographical distribution and the species problem in this group of algae, mainly from the genera Gonium, Pandorina, Eudorina, and Volvox, are critically discussed. There are both cosmopolitan volvocalean species and species with local or disjunct distribution. On the other hand, the description of new cryptic taxa in some genera of the colonial family Volvocaceae, such as Pandorina and Volvox, complicates the preparation of a comprehensive review on their geography.

Dominant modes of interannual variability in precipitation over the Hengduan Mountains during rainy seasons

2020 ◽  
Author(s):  
Weichen Tao ◽  
Gang Huang ◽  
Danhong Dong ◽  
Pengfei Wang ◽  
Ting Yu ◽  
...  
Keyword(s):  
Interannual Variability ◽  
Hengduan Mountains

scholarly journals Meta-analysis reveals severe pollen limitation for the flowering plants growing in East Himalaya-Hengduan Mountains region

BMC Ecology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Xianfeng Jiang ◽  
Yanping Xie
Keyword(s):  
Confidence Interval ◽  
Pollen Limitation ◽  
Meta Analysis ◽  
Flowering Plants ◽  
Biodiversity Hotspot ◽  
Clear Relationship ◽  
Hengduan Mountains ◽  
Independent Data ◽  
The World ◽  
Global Biodiversity

Abstract Background Pollen limitation occurs widely and has an important effect on flowering plants. The East Himalaya-Hengduan Mountains region is a global biodiversity hotspot. However, to our knowledge, no study has synthetically assessed the degree of pollen limitation in this area. The present study aims to reveal the degree of pollen limitation for the flowering plants growing on East Himalaya-Hengduan Mountains and to test whether the reproductive features or the elevation is closely correlated with the degree of pollen limitation in this area. Results We complied data from 76 studies, which included 96 species and 108 independent data records. We found that the flowering plants in this area undergo severe pollen limitation [overall Hedges’ d = 2.004, with a 95% confidence interval (1.3264, 2.6743)] that is much higher than that of the flowering plants growing in many other regions around the world. The degree of pollen limitation was tested to determine the correlation with the capacity for autonomous self-reproduction and with the pollination pattern (generalized vs. specialized pollination) of plants. In addition, we found a clear relationship between elevation and the degree of pollen limitation, which indicates that plants might undergo more severe pollen limitation in relatively high places. Conclusions This paper is the first to address the severe pollen limitation of the flowering plants growing in East Himalaya-Hengduan Mountains region. Moreover, we reveal the positive correlation between elevation and the degree of pollen limitation.

scholarly journals Out of the Neotropics: Late Cretaceous colonization of Australasia by American arthropods

2012 ◽  
Vol 279 (1742) ◽  
pp. 3501-3509 ◽  
Author(s):  
Prashant P. Sharma ◽  
Gonzalo Giribet
Keyword(s):  
Late Cretaceous ◽  
Divergence Time ◽  
Disjunct Distribution ◽  
Continental Margins ◽  
Divergence Time Estimates ◽  
Evolutionary Origins ◽  
Source Regions ◽  
Time Estimates ◽  
Fiji Islands ◽  
The Pacific

The origins of tropical southwest Pacific diversity are traditionally attributed to southeast Asia or Australia. Oceanic and fragment islands are typically colonized by lineages from adjacent continental margins, resulting in attrition of diversity with distance from the mainland. Here, we show that an exceptional tropical family of harvestmen with a trans-Pacific disjunct distribution has its origin in the Neotropics. We found in a multi-locus phylogenetic analysis that the opilionid family Zalmoxidae, which is distributed in tropical forests on both sides of the Pacific, is a monophyletic entity with basal lineages endemic to Amazonia and Mesoamerica. Indo-Pacific Zalmoxidae constitute a nested clade, indicating a single colonization event. Lineages endemic to putative source regions, including Australia and New Guinea, constitute derived groups. Divergence time estimates and probabilistic ancestral area reconstructions support a Neotropical origin of the group, and a Late Cretaceous ( ca 82 Ma) colonization of Australasia out of the Fiji Islands and/or Borneo, which are consistent with a transoceanic dispersal event. Our results suggest that the endemic diversity within traditionally defined zoogeographic boundaries might have more complex evolutionary origins than previously envisioned.

Synopsis of the genus Bothriochloa (Poaceae: Andropogoneae) in India

Phytotaxa ◽  
2021 ◽  
Vol 516 (1) ◽  
pp. 43-58
Author(s):  
SHAHID NAWAZ LANDGE ◽  
RAJENDRA D. SHINDE
Keyword(s):  
Papua New Guinea ◽  
Morphological Study ◽  
Far East ◽  
Detailed Comparison ◽  
Disjunct Distribution ◽  
Indian Species ◽  
Taxonomic Study ◽  
Morphological Attributes ◽  
Morphological Variations ◽  
First Time

During the taxonomic study of the genus Bothriochloa from India, B. ewartiana was reported for the first time in Asia from India. Earlier, it was known only from Australia, Lesser Sunda Island (Sumbawa, Timor), Philippines (Luzon), and Papua New Guinea (Madang). We have discussed about its amphitropical disjunct distribution over a vast continental gap with respect to some variability reported in the morphological attributes. A hypothesis behind its seclusion from Far East is also discussed. The images of the habitat and habit of B. ewartiana along with its detailed comparison with a close species B. woodrovii are provided. The taxonomic limits of each Indian species of Bothriochloa along with their ranges of morphological variations and distribution have been discussed in a detail. The Indian endemic B. parameswaranii (synonym nova) has been relegated, based on the morphological study, as a new taxonomic synonym of B. insculpta. Moreover, keys to identify closely allied genera and the species of Bothriochloa in India are provided. At the end, identification, taxonomic notes and the range of variations of Dichanthium foulkesii, D. jainii & D. concanense have been discussed in a detail.

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