Long-term persistence of wildlife populations in a pastoral area

Facilitating coexistence between people and wildlife is a major conservation challenge in East Africa. Some conservation models aim to balance the needs of people and wildlife, but the effectiveness of these models is rarely assessed. Using a case-study approach, we assessed the ecological performance of a pastoral area in northern Tanzania (Manyara Ranch) and established a long-term wildlife population monitoring programme (carried out intermittently from 2003-2008 and regularly from 2011-2019) embedded in a distance sampling framework. By comparing density estimates of the road-transect based long-term monitoring to estimates derived from systematically distributed transects, we found that the bias associated with non-random placement of transects was non-significant. Overall, cattle, and sheep and goat reached the greatest densities and several wildlife species occurred at densities similar (zebra, wildebeest, waterbuck, Kirk’s dik-dik) or possibly even greater (giraffe, eland, lesse...

促进人与野生动物共存是东非保护工作面临的重大挑战。部分保护模式旨在平衡人与野生动物的需求，但这些模式的有效性却鲜有评估。本研究采用案例分析方法，评估了坦桑尼亚北部的一个牧区（曼雅拉牧场，Manyara Ranch）的生态表现，并建立了一个嵌入距离抽样框架（distance sampling framework）的长期野生动物种群监测项目（2003-2008年为间歇性开展，2011-2019年为定期开展）。通过比较基于道路样线的长期监测密度估计值与系统分布样线得出的估计值，我们发现非随机样线布置相关的偏差并不显著。总体而言，牛、绵羊和山羊的密度最高，部分野生动物物种的密度与之相近（斑马、角马、水羚、柯克氏犬羚），甚至可能更高（长颈鹿、大羚羊、……）