Kristůfek V, Pizl V, Ravasz K
Institute of Soil Biology, Czechoslovak Academy of Sciences, Ceské Budĕjovice.
Acta Microbiol Immunol Hung. 1995;42(1):39-44.
Epifluorescent microscopy was employed to compare the bacterial live counts (BC) in the gut of two earthworm species Aporrectodea caliginosa and Lumbricus rubellus, representing different ecophysiological groups. The average number of BC was 10.9 x 10(9) g-1 dry weight in the gut of A. caliginosa, 5.9 x 10(9) in that of L. rubellus, 8.1 x 10(9) in earthworm casts and 6.0 x 10(9) in the soil. The number of BC showed a great seasonal variability in all the materials studied, exhibiting maxima in spring and autumn, and a minimum in summer. The BC increased in number during the passage of food material through the gut of both L. rubellus and A. caliginosa. The difference between BC in fore-gut and hind-gut were significantly higher in L. rubellus (4.2 x 10(9) vs. 8.8 x 10(9)) than that in A. caliginosa (10.3 x 10(9) vs. 13.4 x 10(9)). Interspecific differences in the number of BC may result from the different chemical and microbiological composition of the material consumed by earthworms as related to different feeding habits of both species.
采用落射荧光显微镜比较了两种代表不同生态生理类群的蚯蚓——背暗异唇蚓和红色爱胜蚓肠道中的细菌活菌数（BC）。背暗异唇蚓肠道中BC的平均数量为10.9×10⁹个/克干重，红色爱胜蚓肠道中的为5.9×10⁹个，蚯蚓粪中的为8.1×10⁹个，土壤中的为6.0×10⁹个。在所研究的所有材料中，BC的数量都表现出很大的季节性变化，在春季和秋季达到最大值，在夏季达到最小值。在食物通过红色爱胜蚓和背暗异唇蚓肠道的过程中，BC数量增加。红色爱胜蚓前肠和后肠中BC的差异（4.2×10⁹个对8.8×10⁹个）显著高于背暗异唇蚓（10.3×10⁹个对13.4×10⁹个）。BC数量的种间差异可能是由于蚯蚓消耗的物质具有不同的化学和微生物组成，这与两个物种不同的摄食习惯有关。
