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Land-use change and windstorms legacies drove the recolonization dynamics of laurel forests in Tenerife, Canary islands
Forest Ecosystems ( IF 3.8 ) Pub Date : 2023-02-18 , DOI: 10.1016/j.fecs.2023.100098
Vicente Rozas , María A. García-López , José M. Olano , Gabriel Sangüesa-Barreda , Miguel García-Hidalgo , Susana Gómez-González , Roberto López-Rubio , José M. Fernández-Palacios , Ignacio García-González , Laura Lozano-López , Paula García-González , Ana I. García-Cervigón

Laurel forests are quite relevant for biodiversity conservation and are among the island ecosystems most severely damaged by human activities. In the past, Canary laurel forests have been greatly altered by logging, livestock and agriculture. The remains of laurel forests are currently protected in the Canary Islands (Spain). However, we miss basic information needed for their restoration and adaptive management, such as tree longevity, growth potential and responsiveness to natural and anthropogenic disturbances. Using dendrochronological methods, we studied how forest dynamic is related to land-use change and windstorms in two well-preserved laurel forests on Tenerife Island. Wood cores were collected from over 80 trees per stand at three stands per forest. We used ring-width series to estimate tree ages and calculate annual basal area increments (BAI), cumulative diameter increases, and changes indicative of released and suppressed growth. Twelve tree species were found in all stands, with Laurus novocanariensis, Ilex canariensis and Morella faya being the most common species. Although some individuals were over 100 years old, 61.8%–88.9% of the trees per stand established between 1940 and 1970, coinciding with a post-war period of land abandonment, rural exodus and the onset of a tourism economy. Some trees have shown growth rates larger than 1 ​cm diameter per year and most species have had increasing BAI trends over the past decades. Strong growth releases occurred after windstorms at both sites, but the effects of windstorms were site-dependent, with the 1958 storm affecting mainly the eastern tip of the island (Anaga massif) and the 1991 storm the western tip (Teno massif). Given the great ability of laurel forest trees to establish after land use cessation and to increase growth after local disturbances such as windstorms, passive restoration may be sufficient to regenerate this habitat in currently degraded areas.



中文翻译:

土地利用变化和风暴遗留物推动了加那利群岛特内里费岛月桂林的再殖民化动态

月桂林与生物多样性保护密切相关,是受人类活动破坏最严重的岛屿生态系统之一。过去,金丝雀月桂树森林因伐木、畜牧业和农业而发生了巨大变化。月桂林的遗迹目前在加那利群岛(西班牙)受到保护。然而,我们错过了它们恢复和适应性管理所需的基本信息,例如树木寿命、生长潜力以及对自然和人为干扰的反应。我们使用树木年代学方法,研究了特内里费岛上两片保存完好的月桂树森林的森林动态与土地利用变化和风暴之间的关系。每个林分三个林分,每个林分从 80 多棵树中收集木芯。我们使用年轮宽度系列来估计树龄并计算年度断面积增量 (BAI)、累积直径增加以及表明释放和抑制生长的变化。在所有林分中发现了 12 种树种,其中Laurus novocanariensis , Ilex canariensisMorella faya是最常见的物种。尽管有些人的树龄超过 100 岁,但 61.8%–88.9% 的树木是在 1940 年至 1970 年间建立的,恰逢战后土地荒废、农村人口外流和旅游经济兴起的时期。一些树木的生长速度每年超过 1 厘米直径,并且大多数物种在过去几十年中都有增加的 BAI 趋势。两个地点的风暴过后都出现了强劲的生长释放,但风暴的影响因地点而异,1958 年的风暴主要影响岛的东端(Anaga 地块),1991 年的风暴主要影响西端(Teno 地块)。鉴于月桂树林在土地使用停止后恢复生长的能力很强,并在暴风等局部干扰后增加生长,

更新日期:2023-02-18
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