Pernin Céline, Cortet Jérôme, Joffre Richard, Le Petit Jean, Torre Franck
Inst. Méditerranéen d'Ecologie et Paléoécologie, Univ. Paul Cézanne, case 441, F-13397 Marseille cedex 20, France.
J Environ Qual. 2006 Oct 27;35(6):2283-92. doi: 10.2134/jeq2005.0441. Print 2006 Nov-Dec.
Effects of sewage sludge on litter mesofauna communities (Collembola and Acari) and cork oak (Quercus suber L.) leaf litter decomposition have been studied during 18 mo using litterbags in an in situ experimental forest firebreak in southeastern France. The sludge (2.74 t DM ha(-1) yr(-1)) was applied to fertilize and maintain a pasture created on the firebreak. Litterbag colonization had similar dynamics on both the control and fertilized plots and followed a typical Mediterranean pattern showing a greater abundance in spring and autumn and a lower abundance in summer. After 9 mo of litter colonization, Collembola and Acari, but mainly Oribatida, were more abundant on the sludge-fertilized plot. Leaf litter decomposition showed a similar pattern on both plots, but it was faster on the control plot. Furthermore, leaves from the fertilized plot were characterized by greater nitrogen content. Both chemical composition of leaves and sludges and the decomposition state of leaves have significantly affected the mesofauna community composition from each plot.
在法国东南部一处实地实验性森林防火带，利用凋落物袋对污水污泥对小型土壤动物群落（弹尾目和蜱螨目）以及栓皮栎（Quercus suber L.）落叶分解的影响进行了为期18个月的研究。污泥（2.74吨干物质公顷⁻¹ 年⁻¹）被用于施肥并维持在防火带上创建的牧场。凋落物袋在对照区和施肥区的定殖动态相似，遵循典型的地中海模式，即春季和秋季丰度较高，夏季丰度较低。在凋落物定殖9个月后，弹尾目和蜱螨目，尤其是甲螨亚目，在污泥施肥区更为丰富。落叶分解在两个区域呈现相似模式，但对照区更快。此外，施肥区的树叶氮含量更高。树叶和污泥的化学成分以及树叶的分解状态均显著影响了每个区域的小型土壤动物群落组成。
