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首页> 外文期刊>South-East European Forestry >Ecological, Typological Properties and Photosynthetic Activity (FAPAR) of Common Beech (Fagus sylvatica L.) Ecosystems in Croatia
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Ecological, Typological Properties and Photosynthetic Activity (FAPAR) of Common Beech (Fagus sylvatica L.) Ecosystems in Croatia

机译：克罗地亚常见山毛榉（Fagus sylvatica L.）生态系统的生态，类型学特征和光合活性（FAPAR）

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Background and purpose: The purpose of this study was to assess the structural and functional properties of common beech forest ecosystems in Croatia across a wide macro-climatic gradient (Mediterranean, Alpine and Continental) and to gain insight into the ways they adapt to progressing short-term climatic extremes and anomalies. Material and Methods: Research was undertaken by integration of the expert based, country scale typological delineation of 13 beech ecosystem types, climatic and topographic grids and indices of ecosystem performances such as the JRC FAPAR (Fraction of Absorbed Photosynthetically Active Radiation). Results: This study reveals preferential environmental conditions for beech ecosystem types together with limiting conditions in three margins of the beech distribution area: highest altitudinal zone, south-eastern continental Pannonian zone and the Mediterranean. The results show that the common beech can adapt to a very wide range of environmental conditions: annual mean temperatures from 2.1oC to 13.5oC, annual precipitation from 739 mm to 3444 mm, and altitudinal range from 20.3 m up to 1576 m above sea level. FAPAR reveals some new insight into the adaptive potential and response mechanisms of the common beech to emerging climate change. Conclusion: The common beech has great potential to adapt to increasing spring warming by a preterm shift of phenology onset and retain relatively stable productivity during the phenology peak in July and August, unrelated to external climatic forcing. These findings indicate that the flexibility of phenological timing, especially during springtime, present one of the important mechanisms of adaptation and resilience of the common beech.
机译：背景与目的：本研究的目的是评估整个宏观气候梯度（地中海，高山和大陆）克罗地亚常见的山毛榉森林生态系统的结构和功能特性，并深入了解它们如何适应短期发展。极端气候和异常。材料和方法：研究是通过对13种山毛榉生态系统类型，气候和地形网格以及生态系统性能指标（如JRC FAPAR（吸收的光合作用吸收的辐射））的基于专家的国家级类型学描述进行整合而进行的。结果：这项研究揭示了山毛榉生态系统类型的优先环境条件以及山毛榉分布区三个边缘的限制条件：最高海拔区，东南大陆潘诺尼带和地中海。结果表明，普通山毛榉可以适应各种环境条件：年平均温度从2.1oC到13.5oC，年降水量从739 mm到3444 mm，海拔范围从20.3 m到海拔1576 m 。 FAPAR揭示了一些常见山毛榉对新出现的气候变化的适应潜力和响应机制的一些新见解。结论：普通山毛榉具有很大的潜力，可以通过物候发生的提前转移来适应春季变暖，并在7月和8月的物候高峰期间保持相对稳定的生产力，与外部气候强迫无关。这些发现表明物候时机的灵活性，特别是在春季，是常见山毛榉适应和适应力的重要机制之一。

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