Quaternary glacier development and the relationship between the climate change and tectonic uplift in the Helan Mountain

Zhang, Wei; Mingyue, He; Li, Yonghua; Cui, Zhijiu; Wang, Zhilin; Yu, Yang

doi:10.1007/s11434-012-5283-z

Cited by 16 publications

(8 citation statements)

References 33 publications

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“…Based on the divergence time of chlorotype C1 (0.19 Ma), the demographic histories of T. austromongolica and T. chinensis could be traced back to 0.15 Ma and 0.02 Ma, respectively. As mentioned earlier, the Gonghe Movement started from around 0.15 Ma, which resulted in a substantial uplift of the QTP and promoted the formation of modern Yellow River 37,38 ; therefore, it appears that the expansion of these two species was closely matched to the formation of the modern Yellow River.…”

Section: Discussionmentioning

confidence: 68%

Demographic expansion of two Tamarix species along the Yellow River caused by geological events and climate change in the Pleistocene

Huang

Feng

Pei

et al. 2018

Sci Rep

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The geological events and climatic fluctuations during the Pleistocene played important roles in shaping patterns of species distribution. However, few studies have evaluated the patterns of species distribution that were influenced by the Yellow River. The present work analyzed the demography of two endemic tree species that are widely distributed along the Yellow River, Tamarix austromongolica and Tamarix chinensis, to understand the role of the Yellow River and Pleistocene climate in shaping their distribution patterns. The most common chlorotype, chlorotype 1, was found in all populations, and its divergence time could be dated back to 0.19 million years ago (Ma). This dating coincides well with the formation of the modern Yellow River and the timing of Marine Isotope Stages 5e-6 (MIS 5e-6). Bayesian reconstructions along with models of paleodistribution revealed that these two species experienced a demographic expansion in population size during the Quaternary period. Approximate Bayesian computation analyses supported a scenario of expansion approximately from the upper to lower reaches of the Yellow River. Our results provide support for the roles of the Yellow River and the Pleistocene climate in driving demographic expansion of the populations of T. austromongolica and T. chinensis. These findings are useful for understanding the effects of geological events and past climatic fluctuations on species distribution patterns.

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Section: Discussionmentioning

confidence: 68%

Demographic expansion of two Tamarix species along the Yellow River caused by geological events and climate change in the Pleistocene

Huang

Feng

Pei

et al. 2018

Sci Rep

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“…The Tibetan Plateau was a low-temperature environment as revealed by oxygen isotopic records from ice cores in the Guliya Ice Cap (Yao et al, 1997). The study area was also a low-temperature environment, as supported by glacier advancement that was revealed through a vestige of glaciations in the eastern neighbouring Helan Mountain (Zhang et al, 2012). During the LGM, the ASM was also weak, which was evidenced by the oxygen isotopic records of stalagmites from the Dongge and Hulu Caves (Figure 6a) within the ASM domain.…”

Section: Discussionmentioning

confidence: 99%

History and mechanisms for the expansion of the Badain Jaran Desert, northern China, since 20 ka: Geological and luminescence chronological evidence

Fan

Zhang

et al. 2015

The Holocene

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Desert landscapes are widely distributed in the arid northern China. The Badain Jaran Desert (BJD) is located north-west of the Tengger Desert (TD) and Ulan Buh Desert (UBD), with the Yabrai and Bayan Ulan Mountains separating the BJD from the TD and UBD. Many sand belts with an orientation of NW-SE, which is similar to that of the prevailing sand-transporting winds, connect the BJD with the TD and UBD, forming the sand transportation routes from the BJD to the TD and UBD. Thus, these sand belts are sensitive to the expansion or shrinkage of the BJD, whose chronologies could be critical for understanding the evolution of the BJD. However, age data are still very limited. In this study, field investigation and optically stimulated luminescence (OSL) dating have been conducted in 14 profiles, and 24 OSL ages are obtained. The OSL ages range from approximately 15 ka to modern. Our results and previous chronological data revealed that the BJD’s expansion initiated at 20 ka, and the present-day landscape formed within the latest 2 ka with periodic expansions at 19–15, 11–9, 7.3 and 6–5 ka. We propose that these expansions of the BJD before ~5 ka and during the 0.9–0.8 ka interval were responses to regionally low effective moisture conditions in north-western China, while the expansions at ~2 ka and within the latest 200 years were likely triggered by intensified human activity.

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“…The Helan Mountains are adjacent to the Yellow River Loop and the Ordos Plateau; they are adjacent to the Tengger Desert in the west, the Mu Us Sandy Land in the east, and the Ulan Buhe Desert in the north [ 40 ]. Snow cover is limited in the Helan Mountains [ 41 ] and vegetation distribution is strongly influenced by moisture conditions, exhibiting a typical temperate mountain forest ecosystem. Vegetation is distributed vertically and can be divided into four vertical vegetation zones from the foothills to the main peak [ 42 , 43 ]: (1) mountain steppe belt; (2) mountain sparse forest steppe belt; (3) mountain coniferous forest belt; and (4) subalpine shrub and meadow belt.…”

Section: Methodsmentioning

confidence: 99%

The Effect of Sexes and Seasons on the Morphological Structures of the Ruminant Digestive System of Blue Sheep (Pseudois nayaur)

Meng

Wang

et al. 2023

Animals

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Constant adaptation to environmental changes is required by ruminants to allow them to adapt to different ecological niches and feeding habits. In addition, the morphology and function of ruminant digestive systems reveal some adaptive evolutionary characteristics. Blue sheep (Pseudois nayaur) display a variety of morpho-physiological adaptations that are typical of grazers. In this study, we collected 64 adult blue sheep samples (whole animal carcasses) from the Helan Mountains, China, during different seasons. The external morphological parameters, digestive system morphological indexes, and rumen surface enlargement factors were determined. Our results reveal that the rumen and reticulum weights were positively correlated with the body weight (p = 0.004), while the food channel aperture, intestinal length, and weight of the blue sheep digestive tract presented no significant differences between different seasons (p > 0.05) and sexes (p > 0.05). There were significant differences (p < 0.001) in the density, length, and width of mastoids, and the rumen surface enlargement factor was 2.85 ± 1.37, which is typical of roughage feeders. The nutritional and ecological characteristics of blue sheep represent obvious morphological and physiological adaptations to an herbivorous diet. Adopting a quick foraging strategy allows blue sheep to rapidly consume and excrete large amounts of feed, thus obtaining the required energy for their activities and facilitating better adaption to environmental changes.

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Quaternary glacier development and the relationship between the climate change and tectonic uplift in the Helan Mountain

Cited by 16 publications

References 33 publications

Demographic expansion of two Tamarix species along the Yellow River caused by geological events and climate change in the Pleistocene

Demographic expansion of two Tamarix species along the Yellow River caused by geological events and climate change in the Pleistocene

History and mechanisms for the expansion of the Badain Jaran Desert, northern China, since 20 ka: Geological and luminescence chronological evidence

The Effect of Sexes and Seasons on the Morphological Structures of the Ruminant Digestive System of Blue Sheep (Pseudois nayaur)

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