Characterization of the burrow system of the earthworms Lumbricus terrestris and Aporrectodea giardi using X-ray computed tomography and image analysis

被引:48
作者
Jégou, D [1 ]
Hallaire, V
Cluzeau, D
Tréhen, P
机构
[1] Univ Rennes 1, UMR Ecobio, Lab Ecol Sol & Biol Populat, Biol Stn, F-35380 Paimpont, France
[2] INRA, F-35042 Rennes, France
关键词
earthworms; burrow system; burrow orientation; Xray computed tomography; image analysis;
D O I
10.1007/s003740050558
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
The burrow systems of two earthworm species (Lumbricus terrestris and Aporrectodea giardi) were studied in artificially packed soil columns placed in controlled conditions in the laboratory. At the end of the incubation, which lasted 246 days, the burrow systems were characterized on the undisturbed columns using X-ray computed tomography. This method provided a set of digitized images corresponding to horizontal 3-mm-thick sections. The following parameters were measured using image analysis on each section: number of biopores, their volume, and their individual orientation calculated using an elliptical model of the earthworm channel. The profiles of these parameters through the columns showed that the burrow systems of L. terrestris and A. giardi, which are both anecic species, were very different in terms of total volume, number of burrows, burrow orientation and extension with soil depth. These results led us to conclude that the burrow system of L. terrestris can be considered as a permanent structure whereas that of A. giardi is closer to the burrow system of endogeic species.
引用
收藏
页码:314 / 318
页数:5
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