Salvage logging is thought to have negative impacts on soil functionality because it may increase soil compaction and reduce vegetation cover and soil organic matter content. We investigated whether and to what extent burning and subsequent logging initially altered soil functionality of a Mediterranean forest of Pinus halepensis M. Soil functionality indicators (e.g. soil enzyme activities, basal soil respiration, glomalin-related soil protein, and microbial carbon) were measured in March and October 2017 in unburned forest plots, nearby plots severely burned by wildfire in July 2016, and nearby burned plots severely burned by wildfire and then logged in December 2016 using a lightweight agricultural tractor. The results showed significant differences among three groups: unburned soils sampled in spring (1) and autumn (2), and burned soils (not subject or subject to logging) sampled in spring and autumn. In unburned plots, seasonality had a significant effect, which disappeared in burned plots regardless of whether they had been logged. The burned plots had higher content of organic matter and total nitrogen than the unburned soils but they were not correlated to higher soil respiration or microbial biomass. There were not any differences in any of the soil functionality indicators between the unlogged and logged burned plots. In addition, the burned plots had a higher glomalin-related soil protein content than the unburned soil in the autumn measurement. Overall, the results suggest a short-term wildfire impact of soil properties whereas logging using a lightweight tractor produced no significant impacts in this sparse Mediterranean pine forest.

中文翻译：

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短期野火和伐木对黑松林土壤功能的影响

抢救性伐木被认为对土壤功能有负面影响，因为它可能会增加土壤压实并减少植被覆盖和土壤有机质含量。我们调查了燃烧和随后的伐木是否以及在多大程度上改变了地中海松林的土壤功能。 土壤功能指标（例如土壤酶活性、基础土壤呼吸、与球藻素相关的土壤蛋白质和微生物碳）在2017 年 3 月和 10 月未燃烧的森林地块，2016 年 7 月附近被野火严重烧毁的地块，以及附近被野火严重烧毁的地块，然后在 2016 年 12 月使用轻型农用拖拉机伐木。结果显示三组之间存在显着差异：春季（1）和秋季（2）采样的未燃烧土壤，和在春季和秋季采样的烧毁土壤（不受或受伐木影响）。在未烧毁的地块中，季节性有显着的影响，在烧毁的地块中，无论是否被采伐，季节性都会消失。燃烧的地块比未燃烧的土壤具有更高的有机质和总氮含量，但它们与更高的土壤呼吸或微生物生物量无关。未记录和已记录的燃烧地块之间的任何土壤功能指标没有任何差异。此外，在秋季测量中，烧过的地块与未烧过的土壤相比，与球藻素相关的土壤蛋白质含量更高。总体而言，结果表明土壤性质受到短期野火影响，而使用轻型拖拉机进行伐木对这片稀疏的地中海松林没有产生重大影响。