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首页> 外文期刊>The holocene >Estimates of 'relative pollen productivity' and 'relevant source area of pollen' for major tree taxa in two Norfolk (UK) woodlands
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Estimates of 'relative pollen productivity' and 'relevant source area of pollen' for major tree taxa in two Norfolk (UK) woodlands

机译：两个诺福克（英国）林地主要树类群的“相对花粉生产力”和“花粉相关来源面积”的估算

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摘要

Surface sample pollen assemblages and vegetation data collected from two East Anglian fen carr sites with adjacent dry woodland belts are analysed to estimate the relevant source area of pollen (RSAP) and the relative pollen productivity (RPP) values for the major canopy trees. The 'relevant source area of pollen' is found to be on the order of 50-150 m, comparable with but slightly greater than estimates for forest hollow contexts in dry woodlands. Estimates of pollen productivity relative to Quercus are then compared with published values from south Sweden. Betula and Corylus values are similar, but some values estimated for taxa characteristic of wetter habitats, and therefore competitively advantaged in the fen carr system (Alnus, Salix and Fraxinus), are substantially higher at one or both sites. The results suggest that palaeoecological records from fen carr systems should be interpreted as reflecting predominantly local vegetation signals once the tree canopy is established.
机译：分析了从两个东安格伦芬卡尔站点与邻近的干燥林地带收集的地表样品花粉组合和植被数据，以估计主要花冠树的花粉相关源面积（RSAP）和相对花粉生产率（RPP）值。发现“花粉的相关来源面积”在50-150 m的数量级，与干燥林地中森林空旷环境的估计值相当，但略大于估计值。然后将相对于栎属的花粉生产率的估计值与瑞典南部的已公布值进行比较。 Betula和Corylus的值相似，但是一些针对较湿的生境的类群特征估计的值，因此在芬卡尔系统（Alnus，Salix和Fraxinus）中的竞争优势，在一个或两个站点上都明显更高。结果表明，一旦树冠建立，来自芬卡尔系统的古生态记录应解释为主要反映局部植被信号。

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