Vertical stratification of testate amoebae in the Elatia Mires, northern Greece: palaeoecological evidence for a wetland response to recent climatic change, or autogenic processes?
Vertical stratification of testate amoebae in the Elatia Mires, northern Greece: palaeoecological evidence for a wetland response to recent climatic change, or autogenic processes?
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希腊北部埃拉蒂亚泥沼中有睾丸变形虫的垂直分层：湿地对近期气候变化或自生过程做出反应的古生态学证据？
DOI：
10.1007/s11273-008-9112-8
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发表时间：
2009
影响因子：
1.8
通讯作者：
J. Pates
中科院分区：
文献类型：
--
作者：
R. Payne;J. Pates
希腊北方的埃拉蒂亚沼泽是具有高度保护价值的独特生态系统。沼泽是气候边缘，可能是敏感的水文气候变化，而北方希腊经历了显着增加干旱自世纪末。为了研究近期气候变化对沼泽水文的影响，从两个地点提取的三个近地表整料的古生态记录进行了调查。有壳变形虫作为水文敏感指标进行了分析。结果进行了解释，使用传递函数模型，以提供定量重建不断变化的地下水位深度和pH值。AMS放射性碳测年和210铅建议泥炭沉积在过去的c。50年，但不允许建立一个安全的年表。所有三个配置文件的结果显示了一个明显的转变，特别是在Euglypha物种的增加，向一个更嗜旱的社会。传递函数的结果推断在此期间的地下水位明显降低。水文响应最近的气候变化是一个站得住脚的假设来解释这种变化，但其他可能的解释包括选择性测试衰减，垂直地带性的生活变形虫，富营养化和当地的水文变化。建议泥炭地对气候变化的响应是最可能的假设，表明边缘泥炭地对近期气候变化的敏感性。
The Elatia Mires of northern Greece are unique ecosystems of high conservation value. The mires are climatically marginal and may be sensitive to changing hydroclimate, while northern Greece has experienced a significant increase in aridity since the late twentieth century. To investigate the impact of recent climatic change on the hydrology of the mires, the palaeoecological record was investigated from three near-surface monoliths extracted from two sites. Testate amoebae were analysed as sensitive indicators of hydrology. Results were interpreted using transfer function models to provide quantitative reconstructions of changing water table depth and pH. AMS radiocarbon dates and 210Pb suggest the peats were deposited within the last c. 50 years, but do not allow a secure chronology to be established. Results from all three profiles show a distinct shift towards a more xerophilic community particularly noted by increases in Euglypha species. Transfer function results infer a distinct lowering of water tables in this period. A hydrological response to recent climate change is a tenable hypothesis to explain this change; however other possible explanations include selective test decay, vertical zonation of living amoebae, ombrotrophication and local hydrological change. It is suggested that a peatland response to climatic change is the most probable hypothesis, showing the sensitivity of marginal peatlands to recent climatic change.
影响因子：
14.6
作者：
Martijn Gough
通讯作者：
Martijn Gough