Bias in butterfly distribution maps: the influence of hot spots and recorder's home range
Bias in butterfly distribution maps: the influence of hot spots and recorder's home range
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DOI：
10.1023/a:1009690919835
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发表时间：
2000-06-01
影响因子：
1.9
通讯作者：
Thomas, C. D.
中科院分区：
文献类型：
--
作者：
Dennis, R. L. H.;Thomas, C. D.
我们使用的数据从默西谷区（3 × 2公里的面积; N = 600我公顷平方米）的大曼彻斯特蝴蝶图集，调查记录访问是否有偏见的访问（即距离记录的家庭基地）和潜在的热点的位置。在多元回归分析中，访问被认为是显着相关的距离，从家庭基地的记录仪，并在广场上发现的物种的平均数和最大数。网站接近的家庭基地的记录更频繁地访问比那些更远的地方和广场，更多的物种比那些广场更频繁地访问与较少的物种。访问也作出了显着更频繁的广场与更多的蝴蝶资源（如寄主植物，花蜜）。此外，记录偏向于和远离不同的土地利用，这在物种丰富度上有很大差异。给出了为什么这些偏见是预期在所有尺度的原因。信息是，未来的分布映射应该基于严格的抽样方法。
We use data from the Mersey Valley zone (3 x 2 km area; N = 600 I ha squares) of the Greater Manchester butterfly atlas to investigate whether recorder visits are biased by access (viz. distance from recorder's home base) and by the locations of potential hot spots. In a multiple regression analysis, visits were found to correlate significantly both with distance from home base of the recorder and with the mean and maximum number of species found in squares. Sites close to the home base of the recorder were visited more frequently than those further afield and squares with more species were visited more frequently than those squares with fewer species. Visits were also made significantly more frequently to squares with greater numbers of butterfly resources (e.g. hostplants, nectar). Furthermore, recording is biased to and away from distinct land uses, which vary significantly in species richness. Reasons are given why these biases are to be expected at all scales. The message is that future distribution mapping should be based on rigorous sampling approaches.