Yao Fu Long, Xia Qian Qian, Zhang Jing, Yang Hai Jun
College of Biology and Geography, Yili Normal University, Yining 835000, Xinjiang, China.
Ying Yong Sheng Tai Xue Bao. 2019 Jul;30(7):2301-2308. doi: 10.13287/j.1001-9332.201907.013.
We analyzed 52 pollen samples of surface soils from the southern slope of western Tian-shan, China, to understand the relationship between the surface pollen and modern vegetation, and the significance of the Artemisia/Chenopodiaceae (A/C). The results showed that there were five vegetation zones from the mountain top to the foot, i.e., alpine desert zone, alpine meadow zone, meadow and steppe zone, mountain desert zone, and typical desert zone. The typical taxa were Artemisia, Chenopodiaceae, Poaceae and Ephedra. The surface pollen assemblages greatly differed across different vegetation zones in this area. Surface pollen in the southern slope of the western Tianshan Mountains was affected by the northern slope, with the impacts increasing with the increases of altitude. The A/C increased with altitude, peaked in the alpine meadow zone, and then decreased, which could effectively indicate the vertical moisture change. Given the great fluctuation of A/C value, when using this ratio to reconstruct climate and environment, attention should be paid to the fact that high values caused by human activities and other factors may lead to misjudgments.
我们分析了中国天山南坡52份表层土壤的花粉样本，以了解表层花粉与现代植被之间的关系，以及蒿属/藜科（A/C）的意义。结果表明，从山顶到山脚有五个植被带，即高山荒漠带、高山草甸带、草甸和草原带、山地荒漠带和典型荒漠带。典型的分类群有蒿属、藜科、禾本科和麻黄属。该地区不同植被带的表层花粉组合差异很大。天山南坡的表层花粉受到北坡的影响，且随着海拔升高影响增强。A/C随海拔升高而增加，在高山草甸带达到峰值，然后下降，这可以有效地指示垂直湿度变化。鉴于A/C值波动较大，在利用该比值重建气候和环境时，应注意人类活动等因素导致的高值可能会导致误判。
