Modelling hydrological relationships of testate amoebae (Protozoa: Rhizopoda) on New Zealand peatlands
Modelling hydrological relationships of testate amoebae (Protozoa: Rhizopoda) on New Zealand peatlands
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DOI：
10.1080/03014223.1997.9517549
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发表时间：
1997-12-01
影响因子：
2.2
通讯作者：
Charman, DJ
中科院分区：
文献类型：
--
作者：
Charman, DJ
在北方的研究表明，有壳变形虫的物种分布和丰度的主要控制因素是当地的水文，在雨养沼泽中，水文直接与气候有关。因此，化石动物群可以用来推断过去的水文和气候条件。本研究调查是否可以找到类似的关系，新西兰泥炭地，作为第一步，发展一种方法，古气候重建。57个样本从13个泥炭地进行了分析，有遗嘱阿米巴和相关的网站水文，pH值和电导率的沼泽沃茨，气候和植被类型，采用典型对应分析（CCA）。地下水位和土壤水分是主导因子，其与物种组合的关系采用4种传递函数：加权平均（WA）、容许下加权加权平均（WA-Tol）、偏最小二乘法（PLS）和加权平均偏最小二乘法（WA-PLS）。PLS和WA-PLS表现最好，并建议古水文可以准确地推断出化石动物群。结果与那些发现在北方泥炭地。
Research in the Northern Hemisphere shows the principal control on species distribution and abundance of testate amoebae to be local hydrology, which in ombrotrophic mires is linked directly to climate. Fossil faunas can therefore be used to infer past hydrological and climatic conditions. This study investigates whether a similar relationship can be found for New Zealand peatlands, as a first step towards developing a method for palaeomoisture reconstructions. Fifty-seven samples from 13 peatlands were analysed for testate amoebae and related to site hydrology, pH and conductivity of mire waters, climate, and vegetation type using canonical correspondence analysis (CCA). Water table and soil moisture were the dominant factors, and their relationship with species assemblage was modelled using four transfer functions: weighted averaging (WA), tolerance downweighted weighted averaging (WA-Tol), partial least squares (PLS), and weighted average partial least squares (WA-PLS). PLS and WA-PLS performed best, and suggest that palaeohydrology could be accurately inferred from fossil faunas. Results are contrasted with those found in the northern peatlands.