Morales Pamela K, Yunusa Isa A M, Lugg Glenys, Li Zheng, Gribben Paul, Eamus Derek
Plant Functional Biology and Climate Change Cluster, University of Technology, Broadway, Sydney, NSW 2007, Australia.
School of Environmental and Rural Sciences, University of New England, Armidale, NSW 2350, Australia.
Landsc Urban Plan. 2013 Dec;120:16-24. doi: 10.1016/j.landurbplan.2013.06.007.
Restoration of belowground ecology is seldom a priority in designing revegetation strategies for disturbed landscapes. We determined earthworm abundance and diversity in a 16-year old grass sward (grassland), a 6-year old (Plantation-04) and a 4-year old (Plantation-06) plantation, both of mixed woody species, on a reclaimed waste disposal site, and in nearby remnant woodland, in suburban Sydney, Australia. While no catches were made in autumn, more earthworms were found in spring (21 ± 8.6 m) than in winter (10.2 ± 5.9 m) or summer (14.4 ± 5.5 m). Earthworm abundance in spring was in the order grassland ≈ Plantation-04 (35.2 m) > woodland (12.8 m) > Plantation-06 (0.8 m). None of the revegetated covers had restored earthworm diversity to levels found in the woodland. Exotic species, mostly , dominated in the four vegetation covers at any time; the only two native species ( sp. and sp.) found were in the woodland. We also assessed how quality of the evolving soils from the three revegetated covers, compared with that from the woodland, impacted viability of common exotic earthworm species. Both weight gain and cocoon production by the exotic earthworms were higher in the soil from Plantation-04 than in soils from the other vegetation covers, including the woodland; the two variables were positively correlated with the pH and mineral nutrient content (as indicated by electrical conductivity that was in turn correlated with clay content) of the soil. Age of vegetation rather than its composition explained differences in the level of earthworm recovery observed.
在为受干扰景观设计植被恢复策略时，地下生态系统的恢复很少被列为优先事项。我们测定了澳大利亚悉尼郊区一个已复垦的垃圾处理场以及附近残留林地中，16年生草地（草原）、6年生（人工林-04）和4年生（人工林-06）人工林（均为混合木本物种）中的蚯蚓丰度和多样性。秋季未捕获到蚯蚓，春季捕获到的蚯蚓（21±8.6米）比冬季（10.2±5.9米）和夏季（14.4±5.5米）更多。春季蚯蚓丰度排序为草地≈人工林-04（35.2米）＞林地（12.8米）＞人工林-06（0.8米）。没有一个植被恢复区域的蚯蚓多样性恢复到林地中的水平。外来物种在任何时候都在这四种植被覆盖区域中占主导；仅在林地中发现了两种本土物种（ 属和 属）。我们还评估了与林地相比，三种植被恢复区域土壤质量的演变对常见外来蚯蚓物种生存能力的影响。外来蚯蚓在人工林-04土壤中的体重增加和茧产量均高于其他植被覆盖区域的土壤，包括林地；这两个变量与土壤的pH值和矿质养分含量（由电导率表示，电导率又与粘土含量相关）呈正相关。观察到的蚯蚓恢复水平差异是由植被年龄而非其组成来解释的。
