Vegetation gradients in Atlantic Europe: the use of existing phytosociological data in preliminary investigations on the potential effects of climate change on British vegetation
Vegetation gradients in Atlantic Europe: the use of existing phytosociological data in preliminary investigations on the potential effects of climate change on British vegetation
复制标题
大西洋欧洲的植被梯度：利用现有的植物社会学数据初步调查气候变化对英国植被的潜在影响
DOI：
10.1046/j.1365-2699.2000.00161.x
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发表时间：
2000
影响因子：
6.4
通讯作者：
A. Malloch
中科院分区：
文献类型：
--
作者：
J. Duckworth;R. Bunce;A. Malloch
1本文旨在展示在初步分析中使用植物社会学文献中的可用植被数据来生成有关植被和气候变化的假设。
2 超过 3000 个钙质草原、中营养草原、荒地和林地植被样本的数据取自大西洋欧洲西部某个地区的文献，并通过去趋势对应分析进行排序，以确定存在的主要梯度。
3气候数据是从现有数据库中以 0.5° 的分辨率获得的。通过每个 0.5° 单元的前两个排序轴的平均得分与气候和位置变量的相关性来研究植被组成与气候之间的关系。
4这些排序为钙质草原、石南荒地和林地带来了明显的地理梯度，但对于中营养草原却没有。一些植被梯度与气候变量之间显示出显着的相关性，其中钙质草原梯度与七月温度、纬度和海洋性之间的相关性最强。还推断了一些植被梯度以反映土壤因素、管理和植被历史。
5那些与温度相关的梯度被假设反映了气候逐渐变暖对物种组成的影响，为进一步研究气候变化对物种组成的影响提供了基线。
6 文献数据的有效性是通过收集石灰质草原的原始实地数据集以及随后对包含文献和实地样本的数据集进行排序来评估的。文献样本和现场样本之间相当大的重叠表明，尽管存在一定的局限性，但可以使用文献数据。因此，利用现成数据进行的初步分析可以取得有用的结果，从而节省漫长且昂贵的实地考察。
1This paper aims to demonstrate the use of available vegetation data from the phytosociological literature in preliminary analyses to generate hypotheses regarding vegetation and climate change.
2Data for over 3000 samples of calcareous grassland, mesotrophic grassland, heath and woodland vegetation were taken from the literature for a region in the west of Atlantic Europe and subjected to ordination by detrended correspondence analysis in order to identify the main gradients present.
3Climate data were obtained at a resolution of 0.5° from an existing database. The relationship between vegetation composition and climate was investigated by the correlation of the mean scores for the first two ordination axes for each 0.5° cell with the climate and location variables.
4The ordinations resulted in clear geographical gradients for calcareous grasslands, heaths and woodlands but not for mesotrophic grasslands. Significant correlations were shown between some of the vegetation gradients and the climate variables, with the strongest relationships occurring between the calcareous grassland gradients and July temperature, latitude and oceanicity. Some of the vegetation gradients were also inferred to reflect edaphic factors, management and vegetation history.
5Those gradients that were related to temperature were hypothesized to reflect the influence of a progressively warmer climate on species composition, providing a baseline for further studies on the influence of climate change on species composition.
6The validity of the literature data was assessed by the collection of an original set of field data for calcareous grasslands and the subsequent ordination of a dataset containing samples from both the literature and the field. The considerable overlap between the samples from the literature and the field suggest that literature data can be used, despite certain limitations. Such preliminary analyses, using readily available data, can thus achieve useful results, thereby saving lengthy and costly field visits.