Stable isotope signals provide seasonal climatic markers for moss functional groups.
Stable isotope signals provide seasonal climatic markers for moss functional groups.
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DOI：
10.1098/rspb.2021.2470
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发表时间：
2022-01-26
期刊：
影响因子：
--
通讯作者：
Griffiths H
中科院分区：
文献类型：
--
作者：
Royles J;Young S;Griffiths H
活苔藓生物量和泥炭档案沉积物是现在和过去气候条件的关键指标，但对未来气候影响的预测需要在一系列当代条件下确定适当的标记物种的特征。高纬度苔藓沉积物中稳定的同位素信号提供了潜在的气候指标。比较了英国东英吉利地区具有代表性的功能基团中有机物质(纤维素)的δ13C和δ18O的季节变化以及相关的光合作用活动(如叶绿素荧光)作为组织水分含量的函数。从酸性沼泽、石南地和沼泽林地生境中选择具有代表性的物种，在2017年春季至2018年秋季每月对新近生长的组织进行采样，使用纯化纤维素中的同位素信号与组织水、降水和附近的地下水信号进行比较。在泥炭形成中占主导地位的泥炭属和多毛类植物，提供了碳同化季节变化的对比和互补指标。炭疽菌纤维素δ18O信号的研究展示了源降水输入的季节变化；多毛菌中的碳同位素信号。指示蒸发需求和光合作用限制。
Living moss biomass and archival peat deposits represent key indicators of present and past climatic conditions, but prediction of future climatic impacts requires appropriate marker species to be characterized under a range of contemporary conditions. Stable isotope signals in high latitude moss deposits offer potential climatic proxies. Seasonal changes in δ13C and δ18O of organic material (cellulose) in representative functional groups, and associated photosynthetic activity (as chlorophyll fluorescence) have been compared across East Anglia, UK, as a function of tissue water content. Representative species from contrasting acid bog, heathland, and fen woodland habitats were selected for monthly sampling of recent growth tissues between spring 2017 and autumn 2018, with isotopic signals in purified cellulose compared with tissue water, precipitation, and nearby groundwater signals. Sphagnum and Polytrichum groups, which tend to dominate peat formation, provided contrasting and complementary indicators of seasonal variations in carbon assimilation. Cellulose δ18O signals from Sphagnum spp. demonstrate seasonal variations in source precipitation inputs; carbon isotope signals in Polytrichum spp. indicate evaporative demand and photosynthetic limitation.
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影响因子：
3.8
作者：
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通讯作者：
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影响因子：
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作者：
Ashcroft, Michael B.;Casanova-Katny, Angelica;Robinson, Sharon A.
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作者：
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通讯作者：
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影响因子：
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作者：
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