A new European testate amoebae transfer function for palaeohydrological reconstruction on ombrotrophic peatlands
A new European testate amoebae transfer function for palaeohydrological reconstruction on ombrotrophic peatlands
复制标题
DOI：
10.1002/jqs.1026
复制
发表时间：
2007-03
影响因子：
2.3
通讯作者：
D. Charman;A. Blundell
中科院分区：
文献类型：
--
作者：
D. Charman;A. Blundell
代用气候数据可以通过使用生物指标（如有遗嘱的变形虫）重建雨养（雨养）泥炭地的水文变化来获得。重建的基础上的传递函数，现代组合组成的地下水位和水分含量，适用于化石序列。欧洲和其他地方现有的转移函数在地理上是有限的，经常存在类似物缺失或不佳的问题。本文提出了一个新的古水文转换函数的基础上采样提出了沼泽从欧洲各地。组合和水文变量之间的关系进行了描述，使用排序分析。转换函数的深度地下水位（n = 119）和含水量（n = 132）的均方根误差（RMSEP）分别为5.6厘米和2.7%。基于“留一法”交叉验证，两个传递函数的r2均为0.71。与现有的英国的传递函数的比较表明，欧洲的传递函数在推断英国测得的地下水位，但英国的数据不能用来推断其他欧洲网站的地下水位的信心。解决了以往传递函数中遇到的几个关键缺失和相似性差的问题。新的传递函数将成为欧洲地区泥炭基古气候重建的重要工具。版权所有© 2006约翰威利父子有限公司。
Proxy climate data can be obtained from reconstructions of hydrological changes on ombrotrophic (rain‐fed) peatlands using biological indicators, such as testate amoebae. Reconstructions are based on transfer functions, relating modern assemblage composition to water table and moisture content, applied to fossil sequences. Existing transfer functions in Europe and elsewhere are limited geographically and there are often problems with missing or poor analogues. This paper presents a new palaeohydrological transfer function based on sampling raised mires from across Europe. Relationships between assemblages and hydrological variables are described using ordination analyses. Transfer functions are developed for depth to water table (n = 119) and moisture content (n = 132) with root mean squared errors (RMSEP) of 5.6 cm and 2.7% respectively. Both transfer functions have an r2 of 0.71, based on ‘leave one out’ cross‐validation. Comparisons with an existing transfer function for Britain show that the European transfer function performs well in inferring measured water tables in Britain but that the British data cannot be used to infer water tables for other European sites with confidence. Several of the key missing and poor analogue taxa problems encountered in previous transfer functions are solved. The new transfer function will be an important tool in developing peat‐based palaeoclimatic reconstructions for European sites. Copyright © 2006 John Wiley & Sons, Ltd.