THE MICROHABITAT OF CULICOIDES-IMPUNCTATUS (DIPTERA, CERATOPOGONIDAE) LARVAE IN SCOTLAND
THE MICROHABITAT OF CULICOIDES-IMPUNCTATUS (DIPTERA, CERATOPOGONIDAE) LARVAE IN SCOTLAND
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DOI：
10.1017/s0007485300032399
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发表时间：
1994-09-01
影响因子：
1.9
通讯作者：
MORDUE, W
中科院分区：
文献类型：
--
作者：
BLACKWELL, A;YOUNG, MR;MORDUE, W
土壤样品取自两个样带（共63个采样点，25厘米的样方），代表桦（桦木科）林地，灯心草牧场和泥炭沼泽植被的西海岸和苏格兰高地，试图与土壤和植被特征的发生库蠓impunctatus Goetghebuer幼虫。 在每个采样点记录了植被群的覆盖情况，并在任意尺度上评估了土壤湿度。 库蠓属从每个样品的一半中提取幼虫并储存用于随后的C.将剩余的一半用于分析土壤pH值和有机物含量（烧失量，LOI）。 对应分析（DECORANA）将样地和植被组分开，排序轴与C.土壤有机质含量和土壤湿润指数。 一元回归分析表明，灯心草科植物锐花灯心草（Juncus acutiflorus/J. articulatus）的密度和土壤湿度指数与灯心草的总体变异呈正相关。无斑螟幼虫密度 湿度指数有最强的关系，这仍然是逐步多元回归的情况。 幼虫密度和土壤pH值之间没有关系。这种信息的幼虫的特定微生境的喜好，可以帮助殖民化的尝试，这占主导地位的重要物种的咬蠓在英国。
Soil samples were taken from two transects (total 63 sampling points; 25 cm quadrats) representing the Betula pubescens (Betulaceae) woodland, rush-pasture and peat-based mire vegetation of the west coast and Highlands of Scotland, in an attempt to relate soil and vegetation features to the occurrence of Culicoides impunctatus Goetghebuer larvae. The covers of vegetation groups were recorded at each sample site and soil wetness was assessed on an arbitrary scale. Culicoides spp. larvae were extracted from half of each sample and stored for subsequent identification of C. impunctatus larvae, while the remaining half was used for analysis of soil pH and organic content (loss on ignition, LOI). Correspondence analysis (using DECORANA) separated the sample sites and vegetation groups and the ordination axes were significantly correlated with the density of C. impunctatus larvae, soil organic content and soil wetness index. Simple regression analyses revealed that the density of Juncus acutiflorus/J. articulatus (Juncaceae) and soil wetness index were positively related to the overall variation in C. impunctatus larval density. The wetness index had the strongest relationship and this remained the case in step-wise multiple regression. There was no relationship between larval density and soil pH. This information on the specific microhabitat preferences of the larvae could aid colonization attempts of this dominantly important species of biting midge in the UK.