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Land‐use history determines ecosystem services and conservation value in tropical agroforestry
Conservation Letters ( IF 8.5 ) Pub Date : 2020-06-14 , DOI: 10.1111/conl.12740
Dominic Andreas Martin 1 , Kristina Osen 2 , Ingo Grass 3 , Dirk Hölscher 2, 4 , Teja Tscharntke 4, 5 , Annemarie Wurz 5 , Holger Kreft 1, 4
Affiliation  

Agroforestry is widely promoted as a potential solution to address multiple UN Sustainable Development Goals, including Zero Hunger, Responsible Consumption and Production, Climate Action, and Life on Land. Nonetheless, agroforests in the tropics often result from direct forest conversions, displacing rapidly vanishing and highly biodiverse forests with large carbon stocks, causing undesirable trade‐offs. Scientists thus debate whether the promotion of agroforestry in tropical landscapes is a sensible policy. So far, this debate typically fails to consider land‐use history, that is, whether an agroforest is derived from forest or from open land. Indeed, 57% of papers which we systematically reviewed did not describe the land‐use history of focal agroforestry systems. We further find that forest‐derived agroforestry supports higher biodiversity than open‐land‐derived agroforestry but essentially represents a degradation of forest, whereas open‐land‐derived agroforestry rehabilitates formerly forested open land. Based on a conceptual framework, we recommend to (a) promote agroforestry on suitable open land, (b) maintain tree cover in existing forest‐derived agroforests, and (c) conserve remaining forests. Land‐use history should be incorporated into land‐use policy to avoid incentivizing forest degradation and to harness the potential of agroforestry for ecosystem services and biodiversity.

中文翻译:

土地使用历史决定了热带农林业的生态系统服务和保护价值

广泛推广农林业作为解决联合国多个可持续发展目标的潜在解决方案,包括零饥饿,负责任的消费和生产,气候行动以及陆地上的生命。尽管如此,热带地区的农用林通常是由直接的林地转换而产生的,它们以大量的碳储量取代了迅速消失的高生物多样性森林,造成了不利的权衡。因此,科学家们争论在热带地区推广农林业是否是明智的政策。到目前为止,这场辩论通常没有考虑土地使用历史,即农用林是来自森林还是来自开放土地。确实,我们系统地审查的论文中有57%没有描述重点农林业系统的土地使用历史。我们还发现,森林农用农林业比开放土地农用农林业支持更高的生物多样性,但本质上代表着森林的退化,而开放土地农用农林业则恢复了原先林木的开放土地。根据概念框架,我们建议(a)在合适的空地上促进农林业,(b)在现有的森林农林中保持树木的覆盖,并(c)保护剩余的森林。土地使用历史应纳入土地使用政策中,以避免激励森林退化,并利用农林业的潜力来提供生态系统服务和生物多样性。我们建议(a)在合适的空地上促进农林业,(b)在现有的森林农林中保持树木覆盖,以及(c)保护剩余的森林。土地使用历史应纳入土地使用政策中,以避免激励森林退化,并利用农林业的潜力来提供生态系统服务和生物多样性。我们建议(a)在合适的空地上促进农林业,(b)在现有的森林农林中保持树木覆盖,以及(c)保护剩余的森林。土地使用历史应纳入土地使用政策中,以避免激励森林退化,并利用农林业的潜力来提供生态系统服务和生物多样性。
更新日期:2020-06-14
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