Emily R. Wedel, Jesse B. Nippert, Rory C. O'Connor, Peace Nkuna, Anthony M. Swemmer
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引用次数: 0
摘要
许多热带稀树草原的树木和灌木覆盖率正在增加，导致草本生产力下降、热带稀树草原功能结构发生变化以及生态旅游可能减少。清除木本植物被认为是一种有效的管理策略，可减轻这些影响，并将这些系统恢复到开放状态，提高产草率和草食率。本研究调查了在南部非洲半干旱稀树草原中反复清除灌木作为缓解灌木侵蚀的一种工具的有效性。我们展示了在与南非克鲁格国家公园接壤的 Mthimkhulu 野生动物保护区进行的为期 7 年的实验数据。我们通过粪便计数监测土壤水分、草地生物量和食草动物活动的变化。我们利用非结构性碳水化合物和稳定水同位素评估了 C. mopane 对反复砍伐的生理反应，以推断能量储存和功能性根深的变化。与对照处理相比，清除处理的土壤湿度和草的生物量更高。粪便计数显示，黑斑羚和水牛光顾清除处理的频率高于对照处理。在最初清理后的头 2-3 年，重复砍伐对 C. mopane 的存活率影响有限，但 7 年后 80% 的个体死亡。与对照地块中的毛竹相比，重复砍伐的毛竹地下淀粉浓度较低，使用的土壤水较浅。综合应用。反复砍伐可增加土壤水分供应量和草地生物量，并吸引有魅力的食草动物来吃草。虽然这种方法比一次性砍伐成本更高，但却为邻近的农村社区创造了更多就业机会。通过改善开放系统中的野味观赏，将部分生态系统转变为草地为主的状态可能会增加生态旅游的潜力。
期刊介绍：
Journal of Applied Ecology publishes novel, high-impact papers on the interface between ecological science and the management of biological resources.The editors encourage contributions that use applied ecological problems to test and develop basic theory, although there must be clear potential for impact on the management of the environment.
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