Scheu S
Abteilung Ökologie, II. Zoologisches Institut der Universität Göttingen, Berliner Strasse 28, D-3400, Göttingen, Federal Republic of Germany.
Oecologia. 1987 May;72(2):192-196. doi: 10.1007/BF00379266.
Burrow formation (burrow length and faeces production) of the substrate feeding earthworm Aporrectodea caliginosa (Savigny) in relation to three temperatures (5, 10 and 15°C) and soil moisture contents (48, 60 and 73% water of dry wt) was determined. Soil moisture content affected the burrowing activity of A. caliginosa only below a distinct threshold (60% water of dry wt). At sufficient moisture an, increase in temperature by 5° C approximately doubled the amount of egesta produced. Another substrate feeding earthworm (Octolasion lacteum (Örley)) showed a similar pattern of burrowing activity.The data for the dependence of the faeces production of A. caliginosa on soil temperature and moisture content were combined with field data. The amount of faeces produced by the population of this earthworm species in a beechwood on limestone was calculated to be about 4.23 kg ha a. The amount of egesta produced by all substrate feeding species is assumed to exceed 6 kg ha a, which is equivalent to a soil layer of approximately 9 mm. This group of earthworms is therefore considered to be of greater importance for bioturbation and the formation of mull than previously assumed.
研究了取食基质的蚯蚓背暗异唇蚓（Savigny）的洞穴形成（洞穴长度和粪便产生量）与三种温度（5、10和15°C）以及土壤含水量（干重的48%、60%和73%水分）之间的关系。土壤含水量仅在一个明显的阈值（干重的60%水分）以下影响背暗异唇蚓的掘穴活动。在有足够水分的情况下，温度每升高5°C，产生的粪便量大约增加一倍。另一种取食基质的蚯蚓（乳色奥克蚓（Örley））表现出类似的掘穴活动模式。将背暗异唇蚓粪便产生量对土壤温度和含水量的依赖性数据与田间数据相结合。计算出在石灰岩山毛榉林中该蚯蚓种群产生的粪便量约为4.23千克/公顷·年。假定所有取食基质的物种产生的粪便量超过6千克/公顷·年，这相当于约9毫米厚的土层。因此，这组蚯蚓被认为在生物扰动和腐殖土形成方面比以前认为的更为重要。
