THE LIFE-HISTORY AND ABUNDANCE OF THE INTRODUCED EARTHWORMS APORRECTODEA-TRAPEZOIDES AND A-CALIGINOSA (ANNELIDA, LUMBRICIDAE) IN PASTURE SOILS IN THE MOUNT LOFTY RANGES, SOUTH-AUSTRALIA

被引：51

作者：

BAKER, GH ^{[1
]}

BARRETT, VJ ^{[1
]}

GREYGARDNER, R ^{[1
]}

BUCKERFIELD, JC ^{[1
]}

机构：

[1] CSIRO, DIV SOILS, GLEN OSMOND, SA 5064, AUSTRALIA

来源：

AUSTRALIAN JOURNAL OF ECOLOGY | 1992年 / 17卷 / 02期

关键词：

D O I：

10.1111/j.1442-9993.1992.tb00796.x

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The introduced earthworms, Aporrectodea trapezoides and Aporrectodea caliginosa, are common in agricultural soils in southern Australia. The seasonal abundances of these species were monitored in five pastures in the Mount Lofty Ranges, South Australia. Highest numbers occurred from winter to early spring: densities of up to 407 and 446 m-2 were recorded for AA. trapezoides and AA. caliginosa, respectively. Adults were restricted to winter and spring, when breeding occurred. Subadults and juveniles survived summer. Aporrectodea trapezoides and AA. caliginosa were abundant in the surface layers of the soil (0-10 cm depth) for between 3 and 7 months (autumn to spring), when soils were moistest. During summer, most individuals were found > 20 cm below the surface where they were inactive, coiled tightly within sperical chambers. The abundance of AA. trapezoides and AA. caliginosa varied within and between pastures. Numbers were lowest where the clay content of the soil was low. AA dipteran parasite attacked aa small proportion of AA. trapezoides at one site in spring.

引用

页码：177 / 188

页数：12