Department of Experimental Design, Faculty of Agriculture and Biology, Warsaw University of Life Sciences (SGGW), Nowoursynowska 159, 02-776, Warsaw, Poland.
Exp Appl Acarol. 2010 Feb;50(2):115-22. doi: 10.1007/s10493-009-9291-x. Epub 2009 Aug 19.
Although Eriophyoidea is one of the most important phytophagous mite taxa owing to its negative impact on plants, reports on associations between occurrences of eriophyoid species are scarce. The aim of this paper is to test the hypothesis that the occurrence of one species is correlated with the occurrence of another in some predictive manner. Analyses are carried out for two popular coniferous trees in Poland, i.e., Norway spruce (Picea abies) and Scots pine (Pinus sylvestris). Observations were made in four locations in Poland, from three age groups of trees, namely adult trees (thirty 15-cm shoot samples from each of ten trees), young trees (ten 15-cm shoot samples from each of ten trees) and seedlings (100 whole-seedling samples). The associations were estimated by Yule's V index. Among four eriophyoid species observed on Scots pine, and the same number of species on Norway spruce, in general no association pattern was observed. It means that their occurrence is independent. The most likely explanation for the absence of co-occurrence is the abundance of microhabitats on coniferous trees for eriophyoid mites, combined with the low mite density on these plant hosts.
尽管瘿螨总科是最重要的植食性螨类之一，因为它们对植物有负面影响，但有关瘿螨物种发生的报道却很少。本文的目的是检验这样一个假设，即一个物种的发生与另一个物种以某种预测方式相关。分析针对波兰两种流行的针叶树进行，即挪威云杉（Picea abies）和欧洲赤松（Pinus sylvestris）。在波兰的四个地点进行了观察，从三个年龄组的树木，即成年树（每棵树 30 个 15 厘米长的枝条样本）、幼树（每棵树 10 个 15 厘米长的枝条样本）和幼苗（100 个完整幼苗样本）中进行了观察。通过 Yule 的 V 指数估计关联。在观察到的欧洲赤松上的四种瘿螨和挪威云杉上相同数量的物种中，通常没有观察到关联模式。这意味着它们的发生是独立的。在针叶树上缺乏共生的最可能解释是瘿螨微生境的丰富度，加上这些植物宿主上的螨密度较低。
