Molecular phylogeography of Fagus engleriana (Fagaceae) in subtropical China: limited admixture among multiple refugia

2012 ◽  
Vol 8 (6) ◽  
pp. 1203-1212 ◽  
Author(s):  
Ming Lei ◽  
Qun Wang ◽  
Zhen-Jian Wu ◽  
Jordi López-Pujol ◽  
De-Zhu Li ◽  
...  
Keyword(s):  
Subtropical China ◽  
Molecular Phylogeography ◽  
Multiple Refugia ◽  
Fagus Engleriana

Reconstructions of the past distribution of Testudo graeca mitochondrial lineages in the Middle East and Transcaucasia support multiple refugia since the Last Glacial Maximum

2021 ◽  
pp. 10-17
Author(s):  
Oguz Turkozan
Keyword(s):  
Middle East ◽  
Last Glacial Maximum ◽  
Glacial Maximum ◽  
Testudo Graeca ◽  
Last Glacial ◽  
The Past ◽  
Precipitation Seasonality ◽  
Multiple Refugia ◽  
The Last Glacial Maximum ◽  
The Last Glacial

A cycle of glacial and interglacial periods in the Quaternary caused species’ ranges to expand and contract in response to climatic and environmental changes. During interglacial periods, many species expanded their distribution ranges from refugia into higher elevations and latitudes. In the present work, we projected the responses of the five lineages of Testudo graeca in the Middle East and Transcaucasia as the climate shifted from the Last Glacial Maximum (LGM, Mid – Holocene), to the present. Under the past LGM and Mid-Holocene bioclimatic conditions, models predicted relatively more suitable habitats for some of the lineages. The most significant bioclimatic variables in predicting the present and past potential distribution of clades are the precipitation of the warmest quarter for T. g. armeniaca (95.8 %), precipitation seasonality for T. g. buxtoni (85.0 %), minimum temperature of the coldest month for T. g. ibera (75.4 %), precipitation of the coldest quarter for T. g. terrestris (34.1 %), and the mean temperature of the driest quarter for T. g. zarudyni (88.8 %). Since the LGM, we hypothesise that the ranges of lineages have either expanded (T. g. ibera), contracted (T. g. zarudnyi) or remained stable (T. g. terrestris), and for other two taxa (T. g. armeniaca and T. g. buxtoni) the pattern remains unclear. Our analysis predicts multiple refugia for Testudo during the LGM and supports previous hypotheses about high lineage richness in Anatolia resulting from secondary contact.

Community dynamics of a montane Fagus engleriana–Cyclobalanopsis multiervis mixed forest in Shennongjia, Hubei, China

2013 ◽  
Vol 20 (6) ◽  
pp. 643-653
Author(s):  
Ge Jielin ◽  
Xiong Gaoming ◽  
Deng Longqiang ◽  
Zhao Changming ◽  
Shen Guozhen ◽  
...  
Keyword(s):  
Community Dynamics ◽  
Mixed Forest ◽  
Fagus Engleriana

Comparason of Litter Decomposition of Six Species of Coniferous and Broad-leaved Trees in Subtropical China

2010 ◽  
Vol 2009 (5) ◽  
pp. 655-659 ◽  
Author(s):  
Peipei GUO ◽  
Hong JIANG ◽  
Shuquan YU ◽  
Yuandan MA ◽  
Rongpeng DOU ◽  
...  
Keyword(s):  
Litter Decomposition ◽  
Subtropical China

scholarly journals Tree diversity and functional leaf traits drive herbivore‐associated microbiomes in subtropical China

2021 ◽  
Author(s):  
Yi Li ◽  
Douglas Chesters ◽  
Ming‐Qiang Wang ◽  
Tesfaye Wubet ◽  
Andreas Schuldt ◽  
...  
Keyword(s):  
Leaf Traits ◽  
Tree Diversity ◽  
Subtropical China

scholarly journals Cytotype distribution and chloroplast phylogeography of the Actinidia chinensis complex

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Zhi Wang ◽  
Caihong Zhong ◽  
Dawei Li ◽  
Chunlin Yan ◽  
Xiaohong Yao ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Demographic History ◽  
Wide Distribution ◽  
Historical Demography ◽  
Actinidia Chinensis ◽  
Ecological Niche Models ◽  
Subtropical China ◽  
Modeling Tools ◽  
Climatic Fluctuations ◽  
Ploidy Levels

Abstract Background Plant phylogeographic studies of species in subtropical China have mainly focused on rare and endangered species, whereas few studies have been conducted on taxa with relatively wide distribution, especially polyploid species. We investigated the cytotype and haplotype distribution pattern of the Actinidia chinensis complex, a widespread geographically woody liana with variable ploidy in subtropical China comprising two varieties, with three chloroplast fragments DNA (ndhF-rpl132, rps16-trnQ and trnE-trnT). Macroevolutionary, microevolutionary and niche modeling tools were also combined to disentangle the origin and the demographic history of the species or cytotypes. Results The ploidy levels of 3338 individuals from 128 populations sampled throughout the species distribution range were estimated with flow cytometry. The widespread cytotypes were diploids followed by tetraploids and hexaploids, whereas triploids and octoploids occurred in a few populations. Thirty-one chloroplast haplotypes were detected. The genetic diversity and genetic structure were found to be high between varieties (or ploidy races) chinensis and deliciosa. Our results revealed that these two varieties inhabit significantly different climatic niche spaces. Ecological niche models (ENMs) indicate that all varieties’ ranges contracted during the Last Inter Glacial (LIG), and expanded eastward or northward during the Last Glacial Maximum (LGM). Conclusions Pliocene and Plio-Pleistocene climatic fluctuations and vicariance appear to have played key roles in shaping current population structure and historical demography in the A. chinensis complex. The polyploidization process also appears to have played an important role in the historical demography of the complex through improving their adaptability to environmental changes.

scholarly journals ENSO modulates wildfire activity in China

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Keyan Fang ◽  
Qichao Yao ◽  
Zhengtang Guo ◽  
Ben Zheng ◽  
Jianhua Du ◽  
...  
Keyword(s):  
Continuous Monitoring ◽  
Southern Oscillation ◽  
Fire Suppression ◽  
Winter Season ◽  
Plant Tissues ◽  
Fire Occurrence ◽  
Subtropical China ◽  
Southeastern China ◽  
Temperature Ranges ◽  
Low Precipitation

AbstractChina is a key region for understanding fire activity and the drivers of its variability under strict fire suppression policies. Here, we present a detailed fire occurrence dataset for China, the Wildfire Atlas of China (WFAC; 2005–2018), based on continuous monitoring from multiple satellites and calibrated against field observations. We find that wildfires across China mostly occur in the winter season from January to April and those fire occurrences generally show a decreasing trend after reaching a peak in 2007. Most wildfires (84%) occur in subtropical China, with two distinct clusters in its southwestern and southeastern parts. In southeastern China, wildfires are mainly promoted by low precipitation and high diurnal temperature ranges, the combination of which dries out plant tissue and fuel. In southwestern China, wildfires are mainly promoted by warm conditions that enhance evaporation from litter and dormant plant tissues. We further find a fire occurrence dipole between southwestern and southeastern China that is modulated by the El Niño-Southern Oscillation (ENSO).

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