Impact of cattle density on the structure and natural regeneration of a turkey oak stand on an agrosilvopastoral farm in central Italy

IF 3.4 2区 农林科学 Q1 FORESTRY
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Abstract

On an agrosilvopastoral farm in central Italy where Maremmana cattle graze in Turkey oak forests, we evaluated the impact of different livestock densities on stand structure, tree diversity and natural regeneration in four types of grazed areas based on the grazing regime adopted: calf-grazed, high-intensity-grazed, low-intensity-grazed, ungrazed control. For each area, we set up three permanent circular plots (radius of 15 m) to survey the structural and dasometric characteristics of the overstorey, understorey, and regeneration layer. The results showed that grazing negatively affected the complexity of the forest structure and its potential to regenerate and maintain a high level of biodiversity. The differences in stand structure observed between the grazing areas were closely related to livestock density. The most sensitive components of the system were the understorey and the regeneration layers. Contrarily, the current grazing management did not affect the dominant tree structure or its composition. Our findings identified medium-term monitoring and regeneration management as the two significant aspects to consider when assessing sustainable livestock. New forests can be established by excluding grazing for about 20–25 years.

牛群密度对意大利中部农牧场火鸡栎林结构和自然再生的影响
摘要 在意大利中部的一个农-草-牧农场,马雷马纳牛在土耳其橡树林中吃草,我们评估了不同牲畜密度对四种放牧区林分结构、树木多样性和自然再生的影响,这四种放牧区分别是:小牛放牧区、高密度放牧区、低密度放牧区和非放牧控制区。我们在每个区域设置了三个永久性圆形地块(半径为 15 米),调查林上层、林下层和再生层的结构和形态特征。结果表明,放牧对森林结构的复杂性及其再生和保持高水平生物多样性的潜力产生了负面影响。在不同放牧区观察到的林分结构差异与牲畜密度密切相关。系统中最敏感的部分是林下和再生层。与此相反,当前的放牧管理并没有影响主要树种结构或其组成。我们的研究结果表明,中期监测和再生管理是评估可持续畜牧业时需要考虑的两个重要方面。通过 20-25 年的禁牧可以建立新的森林。
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来源期刊
CiteScore
7.30
自引率
3.30%
发文量
2538
期刊介绍: The Journal of Forestry Research (JFR), founded in 1990, is a peer-reviewed quarterly journal in English. JFR has rapidly emerged as an international journal published by Northeast Forestry University and Ecological Society of China in collaboration with Springer Verlag. The journal publishes scientific articles related to forestry for a broad range of international scientists, forest managers and practitioners.The scope of the journal covers the following five thematic categories and 20 subjects: Basic Science of Forestry, Forest biometrics, Forest soils, Forest hydrology, Tree physiology, Forest biomass, carbon, and bioenergy, Forest biotechnology and molecular biology, Forest Ecology, Forest ecology, Forest ecological services, Restoration ecology, Forest adaptation to climate change, Wildlife ecology and management, Silviculture and Forest Management, Forest genetics and tree breeding, Silviculture, Forest RS, GIS, and modeling, Forest management, Forest Protection, Forest entomology and pathology, Forest fire, Forest resources conservation, Forest health monitoring and assessment, Wood Science and Technology, Wood Science and Technology.
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