Talbot L M, Turton S M, Graham A W
School of Tropical Environment Studies and Geography, James Cook University, Cairns, Qld 4870, Australia.
J Environ Manage. 2003 Sep;69(1):63-9. doi: 10.1016/s0301-4797(03)00119-1.
Controlled trampling was conducted to investigate the trampling resistance of contrasting high fertility basaltic and low fertility rhyolitic soils and their associated highland tropical rainforest vegetation in north east Australia's Wet Tropics. Although this approach has been taken in numerous studies of trampling in a variety of ecosystem types (temperate and subtropical forest, alpine shrubland, coral reef and seagrass beds), the experimental method does not appear to have been previously applied in a tropical rainforest context. Ground vegetation cover and soil penetration resistance demonstrated variable responses to trampling. Trampling, most noticeably after 200 and 500 passes reduced organic litter cover. Bulk density increased with trampling intensity, particularly on basalt soils as rhyolite soils appeared somewhat resistant to the impacts of trampling. The permeability of the basalt and rhyolite soils decreased markedly with increased trampling intensity, even after only 75 passes. These findings suggest physical and hydrological changes may occur rapidly in tropical rainforest soils following low levels of trampling, particularly on basalt soils.
在澳大利亚东北部湿热带地区，进行了受控践踏试验，以研究高肥力玄武岩土壤和低肥力流纹岩土壤及其相关的高地热带雨林植被的抗践踏能力。尽管这种方法已在多种生态系统类型（温带和亚热带森林、高山灌丛、珊瑚礁和海草床）的大量践踏研究中采用，但该实验方法似乎以前未在热带雨林环境中应用过。地面植被覆盖度和土壤抗穿透性对践踏表现出不同的响应。践踏，尤其是在200次和500次通过后，最明显地减少了有机凋落物覆盖。容重随践踏强度增加而增加，特别是在玄武岩土壤上，因为流纹岩土壤似乎对践踏影响有一定抗性。玄武岩和流纹岩土壤的渗透率随着践踏强度增加而显著降低，即使仅75次通过后也是如此。这些发现表明，在热带雨林土壤中，低水平践踏后可能会迅速发生物理和水文变化，特别是在玄武岩土壤上。
