巴西东南部废弃牧场和种植牧场中土壤微生物活动以及无脊椎动物丰度和丰富度的比较恢复

IF 4.8 2区 农林科学 Q1 SOIL SCIENCE
Tatiana Cabral de Vasconcelos , Vinícius Londe , Anani Morilha Zanini , Ricardo Ribeiro Rodrigues
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引用次数: 0

摘要

牧场的生态恢复是一个复杂的过程,因为这些地方可能会出现土壤质量退化、无脊椎动物的数量和多样性减少等问题。尽管如此,牧场的恢复仍有助于恢复生态系统的基本服务,因此成为一个重要的研究领域。为了更好地了解热带牧场土壤恢复的初始过程,我们考察了巴西东南部土地利用梯度上的土壤微生物活动、枯落物无脊椎动物的丰度和物种丰富度。该梯度包括一个连续使用的牧场(PCU)、三个有 5 年历史的中度辅助恢复牧场(MAR)和无辅助自然恢复牧场(UNR)以及一个参考森林(REF)。我们假设,与 UNR(自然恢复)相比,由于土壤制备和结构复杂性的提高,MAR(人工种植)场地将表现出更高的微生物活性,并支持更多样、更丰富的无脊椎动物种群。我们还预测,MAR 和 REF 地块将促进更高的土壤质量、树种丰富度和树木丰度,这也是微生物活动和枯落物无脊椎动物变化的主要原因。与我们的假设相反,UNR地点的微生物活动水平略高于MAR地点,PCU的微生物生物量碳、微生物呼吸和β-葡萄糖苷酶水平最高。在无脊椎动物的丰度和丰富度方面,MAR 和 UNR 两个地点的情况类似,两者的总丰度和分类群数量都与 REF 相当。我们没有发现微生物活动与植被或土壤质量之间的相关性。只有鞘翅目和半翅目无脊椎动物群与垃圾产量和土壤质量有微弱的联系。我们的研究结果表明,对于缺乏自然再生潜力的地区来说,植树前的场地准备工作是必不可少的,但它似乎会暂时破坏土壤条件。这意味着微生物活动的恢复期较长。不过,这并不是植树的缺点,而是植树过程中不可或缺的一部分,有助于生态系统的长期恢复。植被变量和总体土壤质量可能会对微生物活动和枯落物无脊椎动物产生间接影响。考虑更多变量将有助于更全面地了解这些相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative recovery of soil microbial activity and invertebrate abundance and richness in abandoned and planted pastures in Southeastern Brazil
The ecological restoration of pastures is a complex process, as these sites may suffer from degraded soil quality and reduced abundance and diversity of invertebrates. Nevertheless, their restoration can contribute to the return of essential ecosystem services, making them an important research area. To better understand the initial process of soil restoration in tropical pastures, we examined soil microbial activity, litter invertebrate abundance and species richness across a land-use gradient in southeastern Brazil. This gradient included a pasture in continuous use (PCU), three 5-year-old moderately assisted recovery (MAR) and unassisted natural recovery (UNR) pastures, and a reference forest (REF). We hypothesized that, owing to soil preparation and enhanced structural complexity, MAR (planted) sites would exhibit higher microbial activity and support a more diverse and abundant invertebrate population than UNR (naturally regenerating) sites. We also predicted that the MAR and REF sites would foster higher soil quality, tree species richness, and tree abundance, accounting for most of the variation in microbial activity and litter invertebrates. Contrary to our hypotheses, the UNR sites showed slightly better levels of microbial activity than the MAR sites, and PCU exhibited the highest levels of microbial biomass carbon, microbial respiration, and β-glucosidase. The MAR and UNR sites were similar in terms of invertebrate abundance and richness, both showing total abundance and taxonomic group numbers comparable to those of REF. We found no correlation between microbial activity and vegetation or soil quality. Only Thysanoptera and Hemiptera invertebrate groups showed a weak association with litter production and soil quality. Our findings suggest that site preparation for tree planting, which is indispensable for areas lacking natural regeneration potential, appears to temporarily disrupt the soil conditions. This implies a longer recovery period for the microbial activity. However, this is not a drawback of tree planting but rather an integral part of the process that contributes to long-term ecosystem restoration. Vegetation variables and general soil quality may have an indirect effect on microbial activity and litter invertebrates. It would be beneficial to consider additional variables to gain a more comprehensive understanding of these interactions.
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来源期刊
Applied Soil Ecology
Applied Soil Ecology 农林科学-土壤科学
CiteScore
9.70
自引率
4.20%
发文量
363
审稿时长
5.3 months
期刊介绍: Applied Soil Ecology addresses the role of soil organisms and their interactions in relation to: sustainability and productivity, nutrient cycling and other soil processes, the maintenance of soil functions, the impact of human activities on soil ecosystems and bio(techno)logical control of soil-inhabiting pests, diseases and weeds.
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