Reliability of the Artemisia/Chenopodiaceae pollen ratio in differentiating vegetation and reflecting moisture in arid and semi-arid China
Reliability of the Artemisia/Chenopodiaceae pollen ratio in differentiating vegetation and reflecting moisture in arid and semi-arid China
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中国干旱半干旱地区蒿/藜花粉比区分植被及反映水分的可靠性
DOI：
10.1177/0959683620902219
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发表时间：
2020-02
期刊：
影响因子：
--
通讯作者：
Scott A. Mensing
中科院分区：
文献类型：
--
作者：
Yuang Wang;Wei Wang;Lina Liu;Yajuan Jiang;Zhimei Niu;Yuzhen Ma;Jiang He;Scott A. Mensing
蒿属和藜科植物花粉百分比(A/C)在区分植被和反映干旱半干旱地区水分状况方面的可靠性一直存在争议，这阻碍了它在古气候重建中的潜在应用。本文对干旱半干旱地区的内蒙古高原和柴达木盆地45个湖泊表层沉积物的A/C比进行了调查，并对其与植被和水分的关系进行了数值研究。结果表明，湖心表层沉积物A/C比值可作为区分荒漠草原的有效指标，也可作为推断干旱半干旱地区内蒙古高原和柴达木盆地年平均降水量(MAP)的有效指标。此外，湖心表层沉积物的A/C比在区分植被和反映水分状况方面比土壤表面样品更可靠和更稳健，这可能与其更大的孢粉、来源面积和区域代表性有关。此外，(A−C)/(A+C)指数有助于克服A/C比非线性的固有弱点，在古植被重建中可能是有用的。这些发现为干旱半干旱地区中国湖芯的花粉植被和气候重建提供了有益的参考。
The reliability of the ratio between Artemisia and Chenopodiaceae pollen percentage (i.e. A/C) in differentiating vegetation and reflecting moisture.conditions in arid and semi-arid regions has been disputed and this hindered its potential application in palaeoclimate reconstructions. In this paper, we.investigated the A/C ratios of lake-centre surface sediment from 45 lakes in the Inner Mongolia Plateau and the Qaidam Basin in arid and semi-arid China,.and numerically studied the relationships of A/C ratios with vegetation and moisture. We found that the A/C ratio of lake-centre surface sediments can.be used as an effective index to differentiate desert and steppe and also can be used as a valid indicator to infer mean annual precipitation (MAP) in the.Inner Mongolia Plateau and the Qaidam Basin in arid and semi-arid China. Moreover, the A/C ratio from lake-centre surface sediments is more reliable and.robust than that of soil-surface samples in differentiating vegetation and reflecting moisture conditions, and this might be attributed to its larger pollen.source area and regional representation. In addition, the (A − C)/(A + C) index helps to overcome the inherent weakness of non-linearity of the A/C ratio and may be useful in paleo-vegetation reconstruction. These findings provide useful references for pollen-based vegetation and climate reconstructions of lake cores in arid and semi-arid China.
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DOI：
--
发表时间：
2002
期刊：
--
影响因子：
--
作者：
T. Braak;F. Cateten;P. Šmilauer
通讯作者：
T. Braak;F. Cateten;P. Šmilauer
DOI：
10.1016/0031-0182(71)90019-8
发表时间：
1971
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Colin R. Janssen
通讯作者：
Colin R. Janssen
影响因子：
3.9
作者：
Demske, D;Heumann, G;Oberhänsli, H
通讯作者：
Oberhänsli, H
DOI：
10.1016/0031-0182(95)00037-2
发表时间：
1996-02
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
T. Rhodes;F. Gasse;R. Lin;J. Fontes;K. Wei;P. Bertrand;E. Gibert;F. Mélières;P. Tucholka
通讯作者：
T. Rhodes;F. Gasse;R. Lin;J. Fontes;K. Wei;P. Bertrand;E. Gibert;F. Mélières;P. Tucholka
影响因子：
3.9
作者：
U. Herzschuh
通讯作者：
U. Herzschuh