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Impoverishment of local wild resources in western Amazonia: a large-scale community survey of local ecological knowledge
Environmental Research Letters ( IF 6.7 ) Pub Date : 2020-06-30 , DOI: 10.1088/1748-9326/ab83ad
Oliver T Coomes 1 , Yoshito Takasaki 2 , Christian Abizaid 3
Affiliation  

A growing number of studies point to the depletion of flora and fauna along rivers of the Brazilian Amazon but the status of wild resources over large areas in Western Amazonia remains poorly known. In this paper we report on findings from the Peruvian Amazon based on the first large-scale community survey that uses local ecological knowledge to assess the presence of indicator species and expected harvest yields of game, fish and timber along four major rivers. Our findings from nearly 700 communities suggest that the forest and lakes near riverine communities have been impoverished over the past 50 years, especially of vulnerable species of high commercial value. A zone of species depletion is detected around the two major regional cities of Iquitos and Pucallpa as well as around an important oil town. Local extirpations are common though some recovery is noted for specific fish and timber species. Expected yields are falling and evidence is found for harvesting of previously non-preferred species. Newer communities face lower initial availability of wild resources and forest impoverishment is driven by market demand over subsistence needs. Our findings illustrate the value of drawing on local ecological knowledge and the importance of considering historical baseline conditions in assessments of the fate of wild resources in tropical forests.

中文翻译:

亚马逊西部当地野生资源的贫化:当地生态知识的大规模社区调查

越来越多的研究表明,巴西亚马逊河流域的动植物正在枯竭,但亚马逊西部大片地区的野生资源状况仍知之甚少。在本文中,我们根据第一次大规模社区调查报告了秘鲁亚马逊的发现,该调查利用当地生态知识来评估指示物种的存在以及四大河流沿线的猎物、鱼类和木材的预期收获产量。我们对近 700 个社区的调查结果表明,河流社区附近的森林和湖泊在过去 50 年里一直处于贫困​​状态,尤其是具有高商业价值的脆弱物种。在伊基托斯和普卡尔帕这两个主要地区城市以及一个重要的石油城镇周围发现了一个物种枯竭区。当地的灭绝很常见,尽管对特定的鱼类和木材物种进行了一些恢复。预期产量正在下降,并且有证据表明收获了以前不受欢迎的物种。较新的社区面临较低的野生资源初始​​可用性,森林贫困是由市场需求超过生存需求驱动的。我们的研究结果说明了利用当地生态知识的价值以及在评估热带森林野生资源的命运时考虑历史基线条件的重要性。
更新日期:2020-06-30
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