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首页> 外文期刊>Environmental Evidence >What evidence exists for the effectiveness of on-farm conservation land management strategies for preserving ecosystem services in developing countries? A systematic map
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What evidence exists for the effectiveness of on-farm conservation land management strategies for preserving ecosystem services in developing countries? A systematic map

机译：有什么证据表明农场保护土地管理战略对发展中国家保护生态系统服务的有效性？系统地图

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BackgroundAn extensive body of evidence in the field of agro-ecology claims to show the positive effects that maintenance of ecosystem services can have on meeting future food demand by making farms more sustainable, productive and resilient, which then contributes to improved nutrition and livelihoods of farmers. However, inconsistent effects have commonly been reported, while empirical evidence to support assumed improvements is largely lacking. Overall, a coherent synthesis and review of the evidence of these claims is largely absent from the literature.MethodsSystematic searches of peer-reviewed research were conducted in bibliographic databases of Web of Science, SCOPUS, AGRICOLA, AGRIS databases and CAB abstracts, and grey literature from Google Scholar, and 32 subject-specific websites. Searches identified 21,147 articles. After screening, 746 studies were included in the final map.ResultsOf the 19 conservation land management practices considered, soil fertilisation (24?%), tillage (23?%), agroforestry (9?%), and water conservation (7?%) were most commonly studied. Ecosystem services most commonly studied were supporting (55?%) and regulating (33?%), particularly carbon sequestration/storage, nutrient cycling and soil/water regulation/supply. Key data gaps identified included the absence of long-term records (with datasets spanning >20?years), studies located in North and Central Africa, research that focuses on smallholder landscapes, and studies that span different scales (regional and landscape levels).ConclusionsThe study employs systematic mapping combined with an online interactive platform that geographically maps results, which allows users to interrogate different aspects of the evidence through a defined database field structure. While studies are not directly comparable, the database of 746 studies brings together a previously fragmented and multidisciplinary literature base, and?collectively provides evidence concerning a wide range of conservation land management practices impacting key ecosystem services. The systematic map is easily updatable, and may be extended for additional coding, analysed to assess the quality of studies, or used to inform future systematic reviews.
机译：背景农业生态领域的大量证据表明，维持生态系统服务可以通过使农场更具可持续性，生产力和复原力，对满足未来粮食需求产生积极影响，进而有助于改善农民的营养和生计。但是，通常已经报道了不一致的效果，而在很大程度上缺乏支持假定的改进的经验证据。总体而言，文献中基本上没有对这些主张的证据进行连贯的综合和审查。方法在Web of Science，SCOPUS，AGRICOLA，AGRIS数据库和CAB摘要的书目数据库以及灰色文献中进行了同行评审研究的系统搜索来自Google学术搜索以及32个主题特定的网站。搜索到21,147篇文章。筛选后，最终地图中包含746个研究。结果在考虑的19种保护土地管理实践中，土壤肥力（24％），耕种（23 %%），农林业（9 %%）和节水（7 %%）。 ）是最常用的方法。最常研究的生态系统服务是支持（55％）和调节（33 %%），特别是碳固存/存储，养分循环和土壤/水调节/供应。确定的关键数据缺口包括缺乏长期记录（数据集跨越20年以上），位于北非和中非的研究，侧重于小农户景观的研究以及跨不同规模（区域和景观水平）的研究。结论该研究采用系统映射和在线交互式平台来对结果进行地理映射，该平台允许用户通过定义的数据库字段结构询问证据的不同方面。虽然研究没有直接可比性，但746项研究的数据库汇集了以前零散且多学科的文献基础，并共同提供了有关影响主要生态系统服务的广泛保护土地管理实践的证据。系统图很容易更新，可以扩展为其他编码，可以进行分析以评估研究质量，或用于将来的系统评价。

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