Plants are an important component in many natural ecosystems. They influence soil properties, especially in arid ecosystems. The selection of plant species based on their adaptations to site conditions is essential for rehabilitation of degraded sites and other construction sites such as check-dams. Other factors to be considered in species selection include their effects on soil properties and their abilities to meet other management objectives. The purpose of this study was to assess the effects of native ( Populus euphratica Oliv. and Tamarix ramosissima Ledeb.) and introduced ( Eucalyptus camaldulensis Dehnh. and Prosopis juliflora (Swartz) DC.) woody species on soil properties and carbon sequestration (CS) in an arid region of Iran. Soil sampling was collected at three soil depths (0–10, 10–20 and 20–30 cm) at the sites located under each woody species canopy and in an open area in 2017. Soil physical-chemical property was analyzed in the laboratory. The presence of a woody species changed soil characteristics and soil CS, compared with the open area. For example, the presence of a woody species caused a decrease in soil bulk density, of which the lowest value was observed under E. camaldulensis (1.38 g/cm 3 ) compared with the open area (1.59 g/cm 3 ). Also, all woody species significantly increased the contents of soil organic matter and total nitrogen, and introduced species had more significant effect than native species. The results showed that CS significantly increased under the canopy of all woody species in a decreasing order of P. euphratica (9.08 t/hm 2 )> E. camaldulensis (8.37 t/hm 2 )> P. juliflora (5.20 t/hm 2 )> T. ramosissima (2.93 t/hm 2 )>open area (1.33 t/hm 2 ), thus demonstrating the positive effect of a woody species on CS. Although the plantation of non-native species had some positive effects on soil properties, we recommend increasing species diversity in plantations of native and introduced woody species to provide more diversity for the increased ecosystem services, resilience, health and long-term productivity.

中文翻译：

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根据土壤特性和碳固存，优先考虑木本物种以恢复伊朗西部的干旱土地

植物是许多自然生态系统的重要组成部分。它们影响土壤特性，尤其是在干旱生态系统中。根据对场地条件的适应性选择植物物种对于退化场地和其他建筑工地（例如拦河坝）的恢复至关重要。在物种选择中需要考虑的其他因素包括它们对土壤特性的影响以及它们满足其他管理目标的能力。本研究的目的是评估本地 (Populus euphratica Oliv. 和 Tamarix ramosissima Ledeb.) 和引入 (Eucalyptus camaldulensis Dehnh. 和 Prosopis juliflora (Swartz) DC.) 木本物种对土壤特性和碳封存 (CS) 的影响在伊朗的干旱地区。在三个土壤深度（0-10，10-20 和 20-30 cm) 于 2017 年在位于每个木本树种冠层下和空旷区域的地点。 在实验室中分析了土壤理化性质。与开放区域相比，木本物种的存在改变了土壤特征和土壤 CS。例如，木本物种的存在导致土壤容重降低，其中与空地 (1.59 g/cm 3 ) 相比，在 E. camaldulensis (1.38 g/cm 3 ) 下观察到的最低值。此外，所有木本物种都显着增加了土壤有机质和总氮的含量，引入物种的影响比本地物种更显着。结果表明，在所有木本树种冠层下，CS显着增加，其递减顺序为胡杨（9.08 t/hm 2 ）> 金缕梅（8.37 t/hm 2 ）> 胡杨（5. 20 t/hm 2 )> T. ramosissima (2.93 t/hm 2 )>开放区域(1.33 t/hm 2 )，从而证明了木本物种对CS的积极影响。虽然种植非本地物种对土壤特性有一些积极影响，但我们建议增加本地和引进木本物种种植园的物种多样性，为增加的生态系统服务、恢复力、健康和长期生产力提供更多多样性。