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中国科学院昆明植物研究所知识管理系统
Knowledge Management System of Kunming Institute of Botany,CAS
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GST,p < 0.001) and low levels of seed-based gene flow. C. debaoensis (Cycadaceae) is an endangered species restricted to the border of Guangxi and Yunnan province in southwest China. This species has been classified into two types: sand and karst, according to the soil matrix they grow on. We examined chloroplast sequence variation of the cpDNA sequences from 11 populations of this species. Significant population genetic differentiation was detected (GST= 0.684 and FST = 0.74160). There was marked genetic differentiation between populations in the sand and karst regions and no expansion was detected. Climate changes during glacial periods have had significant effects on the current distribution of cycads. The molecular phylogenetic data, together with the geographic distribution of the haplotypes, suggest that C. debaoensis experienced range contraction during glacial periods, and that the current populations are still confined to the original refugia in southwest China which have favorable habitats in glacial period. These results imply that small refugia were maintained in both sand and karst regions during the LGM (last glacial maximum). This species had no postglacial recolonization and only stayed in these refugia up to now. The low within-population diversity of C. debaoensis suggests that there were strong bottleneck events or founder effects within each separate region during the Quaternary climatic oscillations. Relatively high genetic and haplotype diversities were detected in the newly discovered populations, which located at intermediate locality of sand regions and had morphological variation; this is probably the consequence of the admixture of different haplotypes colonizing the area from separate sources. C. micholitzii occurs in the Annan Highlands in central Vietnam near the Laos border. C. bifida occurs in North Vietnam; its distribution extends across the border into adjacent localities in Guangxi and Yunnan in China. For the comparability between them,theywere considered as the same species C. micholitzii by many academicians. The cpDNA sequences from 11 populations showed that these very controversial species, C. micholitzii and C. bifida, is paraphyletic and should belong to the same species C. micholitzii. AMOVA analysis showed that the component of among-population within region/species (76.46%) was unexpectedly larger than the among-species/region component (14.97%), which also indicates that there is no justification for recognizing two species as C. micholitzii and C. bifida. This hypothesis was also supported by the geological data, especially the neotectonic history of the indo-china block, which started to move south since Oligocene and cause the geographic isolation of these two groups. Therefore, the most likely explanation to the phenotypic similarities between these two groups may be the retention of ancestral polymorphisms in the paraphyletic group due to incomplete lineage sorting. Furthermore, the similarities may also be ascribed to pollen-mediated gene flow among geographically proximate populations and/or phenotypic convergence under similar selection schemes in the same region. C.micholitzi had the higest genetic diversity (HT = 0.980,) and genetic differentiation (GST = 0.830, NST = 0.915) among the C. micholitzii complex. The high genetic diversity might be attributed to its long evolutionary history, highly diverse habitats. The ineffective mode of seed dispersal and dramatic neotectonic movement in the distribution range of this species could result in the high genetic differentiation. 2. Phylogeographic analysis based on nuclear ribosomal sequences, We sequenced the nrDNA ITS in all 27 populations sampled, 7 haplotypes were identified, among which C. micholitzii had 6, while C. multipinnata, C. longipetiolula and C. debaoensis shared the remaining one. Compared to chloroplast genes, nuclear genes had higher correlation between genetic and geographical distance, but lower interspecies differentiation (54.42% vs 25.24%). Phylogeographical structure of C. micholitzii and C.bifida based on ITS Variation was consistent with the morphology differentiation. This similar in nuclear gene should be ascribed to pollen-mediated gene flow among geographically proximate populations.Long-distance gene flow over the two groups was clearly interrupted, which brought on the nrDNA genetic differenciation between the geographically isolated groups, to a certain extent affected the morphological variation. 3. Interspecies relationships among Cycas micholitzii complex, We analysed chloroplast sequence variation of the atpB-rbcL and psbA-trnH intergenic spacers in 27 populations sampled of C. micholitzii complex, AMOVA analysis showed that the component of among-species/region component (59.21%). However, phylogenic analysis showed that the haplotypes of C. micholitzii complex couldn`t grouped into four clusters closely corresponding to the narrowly defined C. micholitzi, C. multipinnata, C. debaoensis and C. longipetiolula. We concluded that the conflict may result from several factors: firstly incomplete lineage sorting of C. micholitzii; secondly hybridization/introgression of sympatrically cycads, which would be supported by evidence base on nrDNA ITS sequences; thirdly intramolecular recombination in cpDNA of cycads; eventually the neotectonic movement in the distribution range of this 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JATROPHA CURCAS L.AN INTERNATIONAL BOTANICAL ANSWER TOBIODIESEL PRODUCTION & RENEWABLE ENERGY
期刊论文
出版物, 3111, 期号: 0, 页码: 1—65
作者:
Zuo Z(作者)
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浏览/下载：300/1
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提交时间：2017/07/24
Angiosperm phylogenetic diversity is lower in Africa than South America
期刊论文
SCIENCE ADVANCES, 2023, 卷号: 9, 期号: 46, 页码: eadj1022
作者:
Qian,Hong
;
Kessler,Michael
;
Zhang,Jian
;
Jin,Yi
;
Soltis,Douglas E.
;
Qian,Shenhua
;
Zhou,Yadong
;
Soltis,Pamela S.
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浏览/下载：176/44
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提交时间：2024/07/17
PLANT-SPECIES RICHNESS
FLORISTIC DIVERSITY
EASTERN ASIA
CAPE FLORA
ODD MAN
EVOLUTIONARY
DIVERSIFICATION
RADIATION
PATTERNS
CLIMATE
Patterns of species richness and turnover in endemic amphibians of the Guineo-Congolian rain forest
期刊论文
DIVERSITY AND DISTRIBUTIONS, 2023
作者:
Nneji,Lotanna M.
;
Azevedo,Josue A. R.
;
Oyebanji,Oyetola O.
;
Ma,Liang
;
Elsen,Paul R.
;
Oladipo,Segun O.
;
Salako,Gabriel
;
Puschendorf,Robert
;
Pringle,Robert M.
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浏览/下载：170/38
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提交时间：2024/07/10
Africa
amphibians
endemic species richness
generalized dissimilarity modelling
species distribution models
beta-diversity
BETA-DIVERSITY
GLOBAL PATTERNS
ENVIRONMENTAL DETERMINANTS
BIOGEOGRAPHICAL REGIONS
LATITUDINAL GRADIENT
GEOGRAPHIC PATTERNS
OCCURRENCE RECORDS
HABITAT SELECTION
SPATIAL TURNOVER
CLIMATE-CHANGE
干热河谷特色生态修复物种筛选与农林复合系统构建
学位论文
: 中国科学院大学, 2022
作者:
赵高卷
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提交时间：2024/05/14
干热河谷，种质资源，农林复合系统，抗旱机制，生物固氮，乔灌草立体修复模式，生态恢复
dry-hot valley, germplasm resources, agroforestry system, drought resistance mechanism, biological nitrogen fixation, three-dimensional trees-shrubs-herbs restoration model, ecological restoration
High aboveground carbon stock of African tropical montane forests
期刊论文
NATURE, 2021, 卷号: 596, 期号: 7873, 页码: 536+
作者:
Cuni-Sanchez,Aida
;
Sullivan,Martin J. P.
;
Platts,Philip J.
;
Lewis,Simon L.
;
Marchant,Rob
;
Imani,Gerard
;
Hubau,Wannes
;
Abiem,Iveren
;
Adhikari,Hari
;
Albrecht,Tomas
;
Altman,Jan
;
Amani,Christian
;
Aneseyee,Abreham B.
;
Avitabile,Valerio
;
Banin,Lindsay
;
Batumike,Rodrigue
;
Bauters,Marijn
;
Beeckman,Hans
;
Begne,Serge K.
;
Bennett,Amy C.
;
Bitariho,Robert
;
Boeckx,Pascal
;
Bogaert,Jan
;
Braeuning,Achim
;
Bulonvu,Franklin
;
Burgess,Neil D.
;
Calders,Kim
;
Chapman,Colin
;
Chapman,Hazel
;
Comiskey,James
;
de Haulleville,Thales
;
Decuyper,Mathieu
;
DeVries,Ben
;
Dolezal,Jiri
;
Droissart,Vincent
;
Ewango,Corneille
;
Feyera,Senbeta
;
Gebrekirstos,Aster
;
Gereau,Roy
;
Gilpin,Martin
;
Hakizimana,Dismas
;
Hall,Jefferson
;
Hamilton,Alan
;
Hardy,Olivier
;
Hart,Terese
;
Heiskanen,Janne
;
Hemp,Andreas
;
Herold,Martin
;
Hiltner,Ulrike
;
Horak,David
;
Kamdem,Marie-Noel
;
Kayijamahe,Charles
;
Kenfack,David
;
Kinyanjui,Mwangi J.
;
Klein,Julia
;
Lisingo,Janvier
;
Lovett,Jon
;
Lung,Mark
;
Makana,Jean-Remy
;
Malhi,Yadvinder
;
Marshall,Andrew
;
Martin,Emanuel H.
;
Mitchard,Edward T. A.
;
Morel,Alexandra
;
Mukendi,John T.
;
Muller,Tom
;
Nchu,Felix
;
Nyirambangutse,Brigitte
;
Okello,Joseph
;
Peh,Kelvin S. -H.
;
Pellikka,Petri
;
Phillips,Oliver L.
;
Plumptre,Andrew
;
Qie,Lan
;
Rovero,Francesco
;
Sainge,Moses N.
;
Schmitt,Christine B.
;
Sedlacek,Ondrej
;
Ngute,Alain S. K.
;
Sheil,Douglas
;
Sheleme,Demisse
;
Simegn,Tibebu Y.
;
Simo-Droissart,Murielle
;
Sonke,Bonaventure
;
Soromessa,Teshome
;
Sunderland,Terry
;
Svoboda,Miroslav
;
Taedoumg,Hermann
;
Taplin,James
;
Taylor,David
;
Thomas,Sean C.
;
Timberlake,Jonathan
;
Tuagben,Darlington
;
Umunay,Peter
;
Uzabaho,Eustrate
;
Verbeeck,Hans
;
Vleminckx,Jason
;
Wallin,Goran
;
Wheeler,Charlotte
;
Willcock,Simon
;
Woods,John T.
;
Zibera,Etienne
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浏览/下载：235/0
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提交时间：2022/04/02
EASTERN ARC MOUNTAINS
GLOBAL PATTERNS
BIOMASS
STORAGE
DIVERSITY
SINK
MAP
Impact of climate change on the spatial distribution of endemic legume species of the Guineo-Congolian forest, Africa
期刊论文
ECOLOGICAL INDICATORS, 2021, 卷号: 122, 页码: 107282
作者:
Oyebanji,O. O.
;
Salako,G.
;
Nneji,L. M.
;
Oladipo,S. O.
;
Bolarinwa,K. A.
;
Chukwuma,E. C.
;
Ayoola,A. O.
;
Olagunju,T. E.
;
Ighodalo,D. J.
;
Nneji,I. C.
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浏览/下载：205/0
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提交时间：2022/04/02
Climate change
Leguminosae
SDM
Spatial distribution
Guineo-Congolian
EVOLUTION
DIVERSIFICATION
MADAGASCAR
RESPONSES
HABITAT
MODELS
WEST
Plastome phylogenomics of the East Asian endemic genus Dobinea
期刊论文
PLANT DIVERSITY, 2021, 卷号: 43, 期号: 1, 页码: 35-42
作者:
Liu,Changkun
;
Yang,Jin
;
Jin,Lei
;
Wang,Shuying
;
Yang,Zhenyan
;
Ji,Yunheng
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浏览/下载：364/150
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提交时间：2022/04/02
Neo-endemism
Divergence
Dobinea delavayi
Dobinea vulgaris
Dobineeae
Anacardiaceae
QUANTITATIVE RECONSTRUCTION
MOLECULAR PHYLOGENETICS
EVOLUTIONARY HISTORY
CHLOROPLAST GENOME
SAPINDALES
MONSOON
NUCLEAR
CHINA
DIVERSIFICATION
ANACARDIACEAE
Spatiotemporal maintenance of flora in the Himalaya biodiversity hotspot: Current knowledge and future perspectives
期刊论文
ECOLOGY AND EVOLUTION, 2021, 卷号: 11, 期号: 16, 页码: 10794-10812
作者:
Wambulwa,Moses C.
;
Milne,Richard
;
Wu,Zeng-Yuan
;
Spicer,Robert A.
;
Provan,Jim
;
Luo,Ya-Huang
;
Zhu,Guang-Fu
;
Wang,Wan-Ting
;
Wang,Hong
;
Gao,Lian-Ming
;
Li,De-Zhu
;
Liu,Jie
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浏览/下载：346/83
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提交时间：2022/04/02
biodiversity hotspot
climate change
elevational gradient
Himalayan flora
mountain ecosystem
spatiotemporal diversification
SPECIES RICHNESS PATTERNS
QINGHAI-TIBET PLATEAU
SOUTH ASIAN MONSOON
ELEVATIONAL GRADIENT
HENGDUAN MOUNTAINS
CLIMATE-CHANGE
BETA-DIVERSITY
QUATERNARY GLACIATION
GENETIC CONSEQUENCES
ARTIFICIAL DISPERSAL
Testing the causes of richness patterns in the paleotropics: time and diversification in cycads (Cycadaceae)
期刊论文
ECOGRAPHY, 2021, 卷号: 44, 期号: 11, 页码: 1606-1618
作者:
Liu,Jian
;
Lindstrom,Anders J.
;
Nagalingum,Nathalie S.
;
Wiens,John J.
;
Gong,Xun
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浏览/下载：276/52
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提交时间：2022/04/02
Cycadaceae
diversification
paleotropics
species richness
time-for-speciation effect
Wallace's line
PALAEOTROPICAL INTERCONTINENTAL DISJUNCTIONS
GEOGRAPHIC RANGE EVOLUTION
SPECIES RICHNESS
SOUTHEAST-ASIA
HISTORICAL BIOGEOGRAPHY
FLORISTIC EXCHANGE
DIVERSITY
DISPERSAL
BORNEO
RATES
Patterns of phylogenetic beta diversity measured at deep evolutionary histories across geographical and ecological spaces for angiosperms in China
期刊论文
JOURNAL OF BIOGEOGRAPHY, 2021, 卷号: 48, 期号: 4, 页码: 773-784
作者:
Qian,Hong
;
Jin,Yi
;
Leprieur,Fabien
;
Wang,Xianli
;
Deng,Tao
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Adobe PDF(1074Kb)
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浏览/下载：269/86
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提交时间：2022/04/02
Chinese flora
environmental gradient
flowering plants
latitudinal gradient
phylogenetic beta diversity
1ST FOSSIL RECORD
VASCULAR PLANTS
SPECIES RICHNESS
ASIAN MONSOON
COMMUNITY STRUCTURE
NICHE CONSERVATISM
EASTERN ASIA
SCALE
TERRESTRIAL
ENVIRONMENT
