Estimation of absolute pollen productivity based on the flower counting approach: A review
Estimation of absolute pollen productivity based on the flower counting approach: A review
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DOI：
10.1016/j.quaint.2022.04.015
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发表时间：
2022-05
影响因子：
2.2
通讯作者：
Ryoma Hayashi;Naoko Sasaki;H. Takahara;S. Sugita;H. Saito
中科院分区：
文献类型：
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作者：
Ryoma Hayashi;Naoko Sasaki;H. Takahara;S. Sugita;H. Saito
花粉生产力估算（PPE）是过去基于花粉的植被定量重建所必需的参数之一。本文综述了20世纪70年代以来用面积数花法获得的绝对花瓣数（aPPEs）。日本有23种树种资料，日本、西班牙和摩洛哥有22种禾本科树种资料。aPPE值在1 ~ 60[1012粒·公顷- 1·年- 1]之间变化，与以前在欧洲报道的使用不同方法和途径的结果相当。温带针叶树的平均appe与一些常见阔叶树如木栗、东北木栗和桤木的appe相当。冷杉、山毛榉和白桦的平均apes较低，而密松、栎树的平均apes较低。、核桃、石竹、七叶树和豆科属中等。本文提出的aPPEs计算的木栖类群（相对于禾科）的相对PPE （rPPE）值小于基于扩展r值模型方法在西欧和中国得到的相对PPE值。取样和分析方法的差异以及禾科花粉产量的区域间差异可能是造成上述差异的原因。虽然还需要进一步的研究，但花计数方法对于特定物种的绝对花粉产量估计是实用的和信息丰富的，并为利用沉积物中的花粉积累率以绝对单位定量重建过去的植被提供了关键参数。
Pollen productivity estimate (PPE) is one of the parameters necessary for pollen-based quantitative reconstruction of vegetation in the past. This paper summarizes and reviews the absolute PPEs (aPPEs) that were obtained with the area-based flower counting approach since the 1970s. The data for 23 species of trees are available from Japan and for 22 species of Poaceae from Japan, Spain, and Morocco. The aPPE values vary from 1 to 60 [1012grains·ha−1·year−1], and are comparable to those previously reported in Europe and using different methods and approaches. The mean aPPEs of temperate conifers, such asSciadopitysverticillata,Cryptomeria japonica, andChamaecyparis obtusa, are as high as those of some of the common broadleaved trees,Castanea mollissima,Castanopsis cuspidata, andAlnusspp. The mean aPPEs ofAbies firma,Fagus crenata, andBetula platyphyllaare low, and those ofPinus densiflora,Quercusspp.,Juglans ailanthifolia,Carpinus tchonoskii,Aesculus turbinata, and Poaceae spp. are intermediate. The relative PPE (rPPE) values of the arboreal taxa (relative to Poaceae), calculated using the aPPEs presented here, are smaller than those obtained in Western Europe and China based on the Extended R-value model approach. Differences in the sampling and analytical methods, as well as the interregional differences in Poaceae pollen productivity, might have contributed to the discrepancies observed. Although further studies are necessary, the flower counting approach is practical and informative for species-specific estimates of absolute pollen productivity and provides critical parameters for quantitatively reconstructing past vegetation in absolute units using the rates of pollen accumulation in sediments.