Raised peat bog development and possible responses to environmental changes during the mid- to late-Holocene. Can the palaeoecological record be used to predict the nature and response of raised peat bogs to future climate change?
Raised peat bog development and possible responses to environmental changes during the mid- to late-Holocene. Can the palaeoecological record be used to predict the nature and response of raised peat bogs to future climate change?
复制标题
全新世中晚期泥炭沼泽的发展和对环境变化的可能反应。
DOI：
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发表时间：
2008
影响因子：
3.4
通讯作者：
D. Yeloff
中科院分区：
文献类型：
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作者：
D. Mauquoy;D. Yeloff
对欧洲西北部隆起泥炭沼泽沉积物的古生态学分析表明，这些生态系统的自然性、古老性和对环境变化的强烈反应，从公元前200年开始。距今7800年。对用于识别这些长期特征的技术进行了回顾，并讨论了气候变化、自生变化过程和人类干扰的作用。泥炭沉积物中记录的植被变化的千年记录表明，在全新世中期，青铜时代/铁器时代过渡和小冰期的气候变化的泥炭沼泽植被的反应（往往是快速的）。温室变暖情景超过了重建的全新世气候变化记录（c。过去的11500年），沼泽地的地下水位可能会大幅下降。百年的古生态分析相结合的沼泽受人类干扰和实验操作已被用作模拟物提出泥炭沼泽植被对这些变化的潜在反应。这些表明，可能的温室气体气候强迫情景可能超过泥炭藓为主的提高泥炭沼泽的能力，以应对预计的夏季温度上升和夏季降水减少。在结合增加氮沉降，泥炭藓丰富的植被和增加的丰富的维管植物的损失可能会发生在十年的时间尺度。
Palaeoecological analyses of raised peat bog deposits in northwest Europe show the naturalness, antiquity and robust response of these ecosystems to environmental changes from c. 7800 years ago to the present. A review of the techniques used to identify these long-term features is presented and the role of climate change, autogenic change processes and human disturbance is discussed. Millennial records of vegetation changes recorded in peat deposits demonstrate the response (often rapid) of raised peat bog vegetation to climatic changes during the mid-Holocene, Bronze Age/Iron Age transition and the Little Ice Age. Greenhouse warming scenarios exceed the reconstructed Holocene record of climatic changes (c. the last 11, 500 years), and bog-water tables may fall considerably. A combination of centennial palaeoecological analyses of bogs affected by human disturbance and experimental manipulations have been used as analogues for the potential response of raised peat bog vegetation to these changes. These show that possible greenhouse gas climate forcing scenarios may exceed the ability of Sphagnum- dominated raised peat bogs to respond to projected increases in summer temperature and decreases in summer precipitation. In combination with increasing N deposition, a loss of their Sphagnum-rich vegetation and increases in the abundance of vascular plants could occur on decadal timescales.