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Patchy landscapes support more plant diversity and ecosystem services than wood grasslands in Mediterranean silvopastoral agroforestry systems
Agricultural Systems ( IF 6.1 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.agsy.2020.102945
Simonetta Bagella , Maria Carmela Caria , Giovanna Seddaiu , Laura Leites , Pier Paolo Roggero

Abstract Plant diversity and proxy indicators of ecosystem services were assessed for three structural components of Mediterranean silvopastoral agroforestry systems: WL = cork oak woodlands, WG = cork oak wood grasslands, and OG = open grasslands. Our study was conducted in a long-term observatory located in NE Sardinia, characterized by fragmented land ownership and land use, which generates a patchy landscape that is different from the extensively studied large scale Iberian dehesas and montados. Our research question was focused on assessing whether, a “patchy” land use scenario made of the combination of WL, WG and OG or a “specialized” scenario could provide more plant diversity and ecosystem services than a “dehesa type” scenario including only WG under the same overall tree cover. The results showed that γ and β diversity, species unique to a position, C stock, cork and acorn production, Hemicryptophytes cover, nectariferous species cover, decreased and pastoral value, excellent and good forage species and legume cover, increased along the WL➔WG➔OG land use gradient. Isolated trees in WG and clearings in WL highly contributed to achieving mainly high C stock and plant diversity respectively. The results also showed that the “specialized” scenario can support higher biodiversity and better ecosystem services than the “dehesa type” scenario, but the “patchy” scenario made of all three components proved to support the highest level of both biodiversity and ecosystem services in Mediterranean silvopastoral agroforestry systems.

中文翻译:

与地中海林牧混农林业系统中的木草地相比,斑驳的景观支持更多的植物多样性和生态系统服务

摘要 对地中海林牧混农林业系统的三个结构组成部分评估了植物多样性和生态系统服务的代理指标:WL = 栓皮栎林地,WG = 栓皮栎林草地,和 OG = 开阔草地。我们的研究是在位于撒丁岛东北部的一个长期天文台进行的,其特点是土地所有权和土地使用分散,产生了与广泛研究的大规模伊比利亚 dehesas 和 montados 不同的斑驳景观。我们的研究问题集中在评估由 WL、WG 和 OG 组合构成的“不完整”土地利用场景或“专门”场景是否比仅包括 WG 的“dehesa 类型”场景可以提供更多的植物多样性和生态系统服务在相同的整体树木覆盖下。结果表明,γ和β多样性,位置特有的物种、C 种群、软木和橡子生产、半隐生植物覆盖、蜜源物种覆盖、减少和牧区价值、优良和良好的牧草物种和豆类覆盖,沿着 WL➔WG➔OG 土地利用梯度增加。WG 中的孤立树木和 WL 中的空地分别对实现高碳储量和植物多样性做出了很大贡献。结果还表明,与“dehesa 类型”情景相比,“专业化”情景可以支持更高的生物多样性和更好的生态系统服务,但由所有三个组成部分组成的“不完整”情景被证明支持最高水平的生物多样性和生态系统服务。地中海林牧混农林业系统。沿 WL➔WG➔OG 土地利用梯度增加的优良牧草种类和豆科植物覆盖率。WG 中的孤立树木和 WL 中的空地分别对实现高碳储量和植物多样性做出了很大贡献。结果还表明,与“dehesa 类型”情景相比,“专业化”情景可以支持更高的生物多样性和更好的生态系统服务,但由所有三个组成部分组成的“不完整”情景被证明支持最高水平的生物多样性和生态系统服务。地中海林牧混农林业系统。沿 WL➔WG➔OG 土地利用梯度增加的优良牧草品种和豆类覆盖率。WG 中的孤立树木和 WL 中的空地分别对实现高碳储量和植物多样性做出了很大贡献。结果还表明,与“dehesa 类型”情景相比,“专业化”情景可以支持更高的生物多样性和更好的生态系统服务,但由所有三个组成部分组成的“不完整”情景被证明支持最高水平的生物多样性和生态系统服务。地中海林牧混农林业系统。
更新日期:2020-11-01
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