How coniferous trees in northern China changed their distribution ranges in response to Quaternary climatic oscillations remains largely unknown. Here we report a study of the phylogeography of Pinus tabulaeformis, an endemic and dominant species of coniferous forest in northern China. We examined sequence variation of maternally inherited, seed-dispersed mitochondrial DNA (mtDNA) (nad5 intron ...

Water mass distribution was studied by analyzing historical hydrographic data in the South China Sea. Despite considerable modification of characteristics as a result of mixing, waters of both salinity maximum and minimum of the North Pacific origin were traced on the density surfaces around 25.0 and 26.73 su, respectively. In the salinity maximum layer, property distribution suggests an intrus...

Central Eastern Asia, foremost the area bordering northern China and Mongolia, has been thought to be the geographic region where Norway rats (Rattus norvegicus) have originated. However recent fossil analyses pointed to their origin in southern China. Moreover, whereas analyses of fossils dated the species' origin as ∼ 1.2-1.6 million years ago (Mya), molecular analyses yielded ∼ 0.5-2.9 Mya. ...

Abstract. During the winters (December–February) between 1985 and 2015, North China Plain (NCP, 30–40.5? N, 112–121.5? E) suffered many periods of heavy haze, these episodes were contemporaneous with extreme rainfall over southern China; i.e., south rainfall–north haze events. The formation such events depends on meteorological conditions which are related to atmospheric circulation associated ...

Oplegnathus punctatus (Temminck & Schlegel, 1844) is reported for the first time in southern South China Sea, off Pulau Tenggol, Malaysia. This species native to north-western and central Pacific Ocean mainly occurs subtropical warm temperate waters. record a significant southward extension of its range also represents documentation family Oplegnathidae Malaysia. 

Against the background of global warming, agricultural meteorological disasters such as waterlogging frequently occur, significantly restricting winter wheat yield and quality formation. Studying changing trend characteristics is beneficial to stabilizing yield. We collected data China’s main production areas in last 20 years explore impact different growth stages on production. The results sho...

the southern shores of caspian sea is subjected to several atmospheric factors due to its geographical position. north atlantic oscillation(nao) one of the effective phenomenon's affects the most part of hemisphere included caspian sea. in this research negative and positive phases of nao considered with variability of temperature and precipitation of southern shores of caspian sea in a 30...

BACKGROUND Self-rated health (SRH) status has been increasingly acknowledged as a valid and appropriate indicator of public health and chronic morbidity. However, limited research was conducted in China due to the different culture and socioeconomic situations. The aim of this study is to assess the SRH status of the population in Southern China using multiple-item SRH measurement scale (SRHMS)...

The bauxite layer in Western Henan supplies a large number of ores and is useful for studying tectonic movement. In this paper, the samples were selected to carry out LA-ICP-MS detrital zircons U-Pb dating Hf isotope testing. results indicated that with Early Paleozoic ages mainly derived from North Qinling Orogenic Belt. Precambrian age may be basement China Block study support opinion Belt ha...

The leaf beetle Diorhabda elongata Brullé subspecies deserticola Chen, collected in northwestern China, has been released in the western United States to control tamarisk (Tamarix spp.). While beetle establishment and saltcedar defoliation have been noted at northern study sites, this species has not established at latitudes south of the 38th parallel. Critical daylength for diapause induction ...