Chaire de Recherche Industrielle CRSNG-Université Laval en Sylviculture et Faune, Centre d'étude de la forêt, Département de Biologie, Université Laval, Québec, Québec, G1V 0A6, Canada.
Chaire de recherche industrielle CRSNG - Université du Québec en Abitibi-Témiscamingue et Université du Québec à Montréal en aménagement forestier durable, Centre d'étude de la forêt, Département des sciences biologiques, Université du Québec à Montréal, Montréal, Canada.
Sci Rep. 2017 Jul 25;7(1):6370. doi: 10.1038/s41598-017-06672-4.
Primary production can determine the outcome of management actions on ecosystem properties, thereby defining sustainable management. Yet human agencies commonly overlook spatio-temporal variations in productivity by recommending fixed resource extraction thresholds. We studied the influence of forest productivity on habitat disturbance levels that boreal caribou - a threatened, late-seral ungulate under top-down control - should be able to withstand. Based on 10 years of boreal caribou monitoring, we found that adult survival and recruitment to populations decreased with landscape disturbance, but increased with forest productivity. This benefit of productivity reflected the net outcome of an increase in resources for apparent competitors and predators of caribou, and a more rapid return to the safety of mature conifer forests. We estimated 3-fold differences in forest harvesting levels that caribou populations could withstand due to variations in forest productivity. The adjustment of ecosystem provisioning services to local forest productivity should provide strong conservation and socio-economic advantages.
初级生产可以决定管理行动对生态系统特性的结果，从而确定可持续管理。然而，人类机构通常通过建议固定的资源开采阈值而忽略了生产力的时空变化。我们研究了森林生产力对生境干扰水平的影响，而这些生境干扰水平是受自上而下控制的受威胁的晚生期有蹄类动物——驯鹿——应该能够承受的。基于 10 年的驯鹿监测，我们发现成年个体的存活率和对种群的补充随景观干扰而下降，但随森林生产力而增加。这种生产力的好处反映了为驯鹿的明显竞争者和捕食者增加资源的净结果，以及更快地回到成熟针叶林的安全地带。我们估计，由于森林生产力的变化，驯鹿种群能够承受的森林采伐水平相差 3 倍。对当地森林生产力的生态系统供应服务的调整应该提供强大的保护和社会经济效益。
