Spatial variation in potential photosynthesis in Northern European bogs
Spatial variation in potential photosynthesis in Northern European bogs
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北欧沼泽潜在光合作用的空间变化
DOI：
10.1111/jvs.12355
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发表时间：
2015
影响因子：
2.8
通讯作者：
Tuittila
中科院分区：
文献类型：
--
作者：
Wilson;Schneider;Tuittila
问题生态系统碳（C）交换的测量通常是劳动密集型且昂贵的。在泥炭地中，这些时间和空间有限的测量通常会在类似的生态系统（例如反营养沼泽）上进行放大，以提供对生态系统水平二氧化碳（CO2）通量的估计。泥炭地的湿度变化通常反映在微形态（例如小丘和空洞）的存在上，每种微形态都具有特征性的植物生命形式。然而，到目前为止，泥炭地类型（例如沼泽、沼泽）或缩微形态对于放大的适用性尚未得到评估。相同类型的泥炭地之间的植被组成或相关物种的功能是否差异如此之大以至于无法扩大规模？位置北欧的五个营养沼泽；在爱尔兰、芬兰和俄罗斯西部。方法我们使用多变量分析描述了微营养沼泽内部和之间的植被微形态的变化。此后，我们测量了不同微形态的二氧化碳交换，并评估了植被结构与光合作用的光响应之间的关系。结果我们的结果表明，在植物生命体水平上，小丘、草坪和空洞的群落组成相当均匀。在不同沼泽的微形态类中，单位叶面积单位的光合能力非常相似。观察到的站点之间的容量差异主要与叶面积的变化有关。结论对生态系统水平光合作用的可靠估计需要了解一个区域中不同微形态的比例以及相关年份中每种微形态的叶面积特征。生态系统层面的光合作用评估对于当前和未来的气候变化非常重要，因为泥炭地最显着的变化涉及水位下降，这反过来可能导致泥炭地内微形态的相对比例发生变化。
QuestionMeasurements of ecosystem carbon (C) exchange are usually labour‐intensive and expensive. In peatlands, these temporally and spatially limited measurements are often up‐scaled over comparable ecosystems, such as ombrotrophic bogs, to provide an estimate for ecosystem level carbon dioxide (CO2) fluxes. Peatlands typically have moisture variations reflected in the presence of microforms (e.g. hummocks and hollows), each with characteristic plant life forms. However, so far the applicability of peatland type (e.g. bog, fen) or microforms for up‐scaling has not been assessed. Does the vegetation composition or function of associated species differ so greatly between the same types of peatland that up‐scaling is impossible?LocationFive ombrotrophic bogs in Northern Europe; in Ireland, Finland and western Russia.MethodsWe described the variation in vegetation of microforms within and between ombrotrophic bogs using multivariate analyses. Thereafter, we measured CO2exchange at different microforms and evaluated the relationship between vegetation structure and the light response of photosynthesis.ResultsOur results show that the community composition of hummocks, lawns and hollows was rather uniform at the plant life‐form level. The photosynthetic capacity per leaf area unit was quite similar within microform classes over the different bogs. The observed differences between sites in capacity were mainly related to variation in leaf area.ConclusionsA reliable estimate of ecosystem‐level photosynthesis requires knowledge of the proportion of different microforms in an area and the leaf area characteristics for each microform in the year(s) in question. Assessments of ecosystem‐level photosynthesis are important with regard to current and future changes in climate, as the most dramatic changes in peatlands involve water level drawdown, which in turn is likely to lead to changes in the relative proportions of microforms within peatlands.
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影响因子：
4
作者：
Liisa Maanavilja;T. Riutta;M. Aurela;M. Pulkkinen;T. Laurila;E. Tuittila
通讯作者：
Liisa Maanavilja;T. Riutta;M. Aurela;M. Pulkkinen;T. Laurila;E. Tuittila
缅因州和新不伦瑞克芬迪湾地区凸起沼泽植被格局的地理变化
DOI：
--
发表时间：
1977
期刊：
Vegetatio
影响因子：
--
作者：
A. W. Damman
通讯作者：
A. W. Damman
DOI：
10.1111/j.1600-0889.2007.00302.x
发表时间：
2007-01
期刊：
Tellus B: Chemical and Physical Meteorology
影响因子：
--
作者：
T. Riutta;Jukka Laine;M. Aurela;J. Rinne;T. Vesala;T. Laurila;S. Haapanala;M. Pihlatie;E. Tuittila
通讯作者：
T. Riutta;Jukka Laine;M. Aurela;J. Rinne;T. Vesala;T. Laurila;S. Haapanala;M. Pihlatie;E. Tuittila
泥炭藓对水位的耐受性
影响因子：
1.9
作者：
H. Rydin;A. McDonald
通讯作者：
A. McDonald
俄罗斯西北部科米共和国北方泥炭地在整个生长季节的二氧化碳交换通量
影响因子：
4
作者：
Schneider;Kutzbach;M. Wilmking
通讯作者：
M. Wilmking