Gutterman Y, Golan T, Garsani M
The Jacob Blaustein Institute for Desert Research and Department of Biology, Ben-Gurion University of the Negev, Sde Boker Campus, 84993, Israel.
Department of Biology, Ben-Gurion University of the Negev, P.O. Box 653, 84105, Beer-Sheva, Israel.
Oecologia. 1990 Nov;85(1):122-127. doi: 10.1007/BF00317352.
The influence of porcupine diggings upon annual vegetation on a north-facing hillslope in the Negev Desert, Israel, has been observed for some 10 years. It was found that within the porcupine diggins there are changes over time in terms of species richness, plant density and plant biomass, and that such changes take place in three stages. During the initial growing season (stage 1), species richness, plant density and plant biomass are lower than in the surrounding non-disturbed area, followed by progressive plant succession. Subsequently, a maximum level is attained when a dig becomes 50-60% filled in (stage 2). As the extent of filling exceeds 60%, a decrease in species richness, plant density and plant biomass is observed (stage 3). This process concurs with models derived in other ecosystems with animals that create surface disturbances. The role of porcupine diggings as a model of disturbance and recovery is discussed.
在以色列内盖夫沙漠一个朝北的山坡上，对豪猪挖掘行为对一年生植被的影响进行了约10年的观察。研究发现，在豪猪挖掘区域内，物种丰富度、植物密度和植物生物量会随时间发生变化，且这种变化分为三个阶段。在最初的生长季节（阶段1），物种丰富度、植物密度和植物生物量低于周围未受干扰的区域，随后植物逐渐演替。当挖掘区域填充至50%-60%时（阶段2），达到最高水平。当填充程度超过60%时，物种丰富度、植物密度和植物生物量会下降（阶段3）。这一过程与其他有造成地表干扰动物的生态系统中得出的模型一致。本文讨论了豪猪挖掘行为作为干扰和恢复模型的作用。
