Pedobiologia最新文献_第4页

Litter decomposition of epiphytic lichens, bryophytes, and vascular plants on the forest floor and canopy in a cool-temperate old-growth forest 寒温带原始森林地表和树冠上附生地衣、苔藓植物和维管植物凋落物的分解

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-07-18 DOI: 10.1016/j.pedobi.2025.151064

Ren Sugimoto , Wakana A. Azuma , Natsuki Komada , Yuya Ogawa

The litter of non-vascular plants, such as epiphytic lichens and bryophytes, contributes to soil formation in the forest floor and tree canopy of old-growth forests. In this study, we investigated litter decomposition to elucidate the ecological functions of non-vascular plants in forest ecosystems. Focusing on a cool-temperate old-growth forest in Japan, we conducted litter bag experiments to examine rates of change in the mass of litter from epiphytic lichens, epiphytic bryophytes, and vascular plants (host tree leaves) after three months and one year. Litter bags were installed at three microsites: on the ground, in thick canopy soil, and in thin canopy soil. The results showed that lichen and bryophyte litter decomposed more slowly than vascular plant litter in ground and thick canopy soil. No significant differences in mass loss rates were observed between the ground and thick and thin canopy soils. However, the contributions of lichens and bryophytes to decomposition at the ground and canopy levels were slightly influenced by environmental variables, such as soil temperature, soil volumetric water content, and canopy openness. A litter bag experiment with a mixture of the three litter species showed no general synergistic effect of mixed litter on vascular plants. This study provides insights into the ecological functions of non-vascular plants in forest ecosystems, emphasizing their role in the dynamics of litter decomposition.

非维管植物的凋落物，如附生地衣和苔藓植物，有助于在原生林的森林地面和树冠形成土壤。本研究通过研究凋落物分解来阐明非维管植物在森林生态系统中的生态功能。以日本寒温带原生林为研究对象，进行了凋落物袋实验，研究了3个月和1年后附生地衣、附生苔藓和维管植物（寄主树叶）凋落物质量的变化率。在地面、厚冠层土壤和薄冠层土壤三个微点设置凋落物袋。结果表明：地衣和苔藓凋落物在地上和厚冠层土壤中比维管植物凋落物分解慢；土壤和厚、薄冠层土壤的质量损失率无显著差异。地衣和苔藓植物对地表和冠层分解的贡献受土壤温度、土壤体积含水量和冠层开度等环境变量的影响较小。三种凋落物的混合凋落物袋试验表明，混合凋落物对维管植物没有普遍的增效作用。本研究揭示了非维管植物在森林生态系统中的生态功能，强调了它们在凋落物分解动力学中的作用。

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引用次数: 0

Disentangling the effect of temperature and moisture on boreal peatland microbial activity and function 温度和湿度对北方泥炭地微生物活动和功能的影响

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-06-10 DOI: 10.1016/j.pedobi.2025.151063

Paige Ferguson , Zoë Lindo

Climate change may reduce the stability of large soil carbon stores within boreal peatlands by altering microbial communities, the main contributors to decomposition in peatlands. Both temperature and moisture levels are known to dictate microbial community composition and activity, and both are sensitive to climate change. Whether alterations in soil microbial activity are predominantly caused by the direct effects of temperature or moisture, or a warming-induced drying effect, is not clear. This study examines experimental warming and drying on peatland surface (oxic) soil samples collected from a southern boreal site in Ontario, Canada. The aim was to disentangle the effects of temperature and moisture variables through a mesocosm approach with two temperature treatments (12°C and 20°C) and two moisture treatments (Field-moist and Dry-induced) in a full factorial experimental design. We measured respiration over the duration of the experiment, with subsequent measurements of microbial biomass using substrate induced respiration, and microbial function through EcoPlate™ and oxidative (phenol oxidase and peroxidase) enzyme assays. While temperature often drove the variation seen in the observed variables (respiration, biomass, functionality), this was often mitigated by moisture levels. Shifts in functional indicators suggest that warming may increase community homogeneity, amplified by drying, and favour species better able to utilize recalcitrant substrates, like polymers. Oxidative enzyme assay results contradict trends in respiration and functionality, suggesting moisture may complicate oxidative enzymatic pathways. Overall trends indicate the potential for peatland soil carbon stores to become liberated with higher average temperatures while moisture levels decrease or are maintained; the conditions predicted throughout boreal peatland distribution with climate change.

气候变化可能通过改变微生物群落（泥炭地分解的主要贡献者）而降低北方泥炭地土壤碳储量的稳定性。众所周知，温度和湿度水平决定了微生物群落的组成和活动，两者都对气候变化很敏感。土壤微生物活动的变化主要是由温度或湿度的直接影响引起的，还是由变暖引起的干燥效应引起的，目前尚不清楚。本研究考察了从加拿大安大略省南部北部地区收集的泥炭地表面（含氧）土壤样本的实验性增温和干燥。目的是在全因子实验设计中，通过两种温度处理（12°C和20°C）和两种湿度处理（田间湿和干诱导）的中观方法来解算温度和湿度变量的影响。我们在实验期间测量呼吸作用，随后使用底物诱导呼吸测量微生物生物量，并通过EcoPlate™和氧化（苯酚氧化酶和过氧化物酶）酶测定微生物功能。虽然温度通常会导致观察到的变量（呼吸、生物量、功能）的变化，但这通常会被湿度水平所缓解。功能指标的变化表明，变暖可能会增加群落的同质性（由于干燥而被放大），并有利于能够更好地利用顽固基质（如聚合物）的物种。氧化酶分析结果与呼吸和功能的趋势相矛盾，表明水分可能使氧化酶途径复杂化。总体趋势表明，随着平均气温升高，泥炭地土壤碳储量有可能释放，而湿度水平降低或保持不变；气候变化对整个北方泥炭地分布的预测。

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引用次数: 0

Corrigendum to “Microplastics lead to behavioral disorders in soil nematode movement, foraging and food choice” [Pedobiol. - J. Soil Ecol. 111 (2025) 151054] “微塑料导致土壤线虫运动、觅食和食物选择的行为障碍”[Pedobiol]的勘误表。[j] .土壤生态学报，2011(5):554 - 554。

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-06-05 DOI: 10.1016/j.pedobi.2025.151062

Xuchao Zhang, Liliane Ruess

引用次数: 0

Inter- and intra-site variation of microarthropod communities in urban parks 城市公园微节肢动物群落的点间和点内变异

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-05-31 DOI: 10.1016/j.pedobi.2025.151061

Tania De Almeida , Eva Baraud , Sophie Joimel

Urban parks are one of the most represented green spaces in cities and can support biodiversity. However, most of the studies demonstrating the role of urban biodiversity do not take into account soil biodiversity, which represents at least ¼ of the world's taxonomic diversity. Among these soil organisms, microarthropods are recognised bioindicators because of their role in soil functioning but also because of their high abundance and sensitivity to a variety of environmental and anthropogenic factors. With high heterogeneity due to soil, management or localisation, nothing looks less like a park than another park. In this study, our aim is rather to understand how soil biodiversity is affected by the spatial configuration of the parks. To do this, we studied inter- and intra-park variation in microarthropod communities using taxonomic and functional approaches based on traits. Our results show communities dominated by Acari, with high abundances of Collembola but low specific richness. Inter-park variations were recorded for the species richness and functional composition of Collembola, Oribatidae abundance, texture and metal levels. That may be linked to the age of the sites in relation with soil physicochemical parameters. Intra-park variations were also observed, particularly for biodiversity indices, which could be explained by the fragmentation of the site and patch size. Despite their small size, soil organisms should be considered in park studies and design (configuration and connectivity). Indeed, understanding the distribution patterns of these organisms is important for improving the role of parks within a functional green and brown urban network.

城市公园是城市中最具代表性的绿色空间之一，可以支持生物多样性。然而，大多数证明城市生物多样性作用的研究都没有考虑到土壤生物多样性，而土壤生物多样性至少占世界分类多样性的四分之一。在这些土壤生物中，微节肢动物是公认的生物指标，因为它们在土壤功能中的作用，也因为它们的高丰度和对各种环境和人为因素的敏感性。由于土壤、管理或本地化的高度异质性，没有什么比另一个公园更不像公园了。在本研究中，我们的目的是了解土壤生物多样性如何受到公园空间配置的影响。为此，我们采用基于性状的分类学和功能学方法研究了小节肢动物群落间和园内的变异。结果表明，群落以蜱螨为主，弹尾虫丰度高，比丰富度低。在不同的公园内，弹虫的种类丰富度和功能组成、甲螨的丰度、质地和金属含量均有不同的变化。这可能与地点的年龄与土壤理化参数有关。公园内的生物多样性指数也发生了变化，这可以用场地的破碎化和斑块大小来解释。尽管土壤生物体积小，但在公园研究和设计（配置和连通性）中应考虑土壤生物。事实上，了解这些生物的分布模式对于改善公园在绿色和棕色城市网络中的作用非常重要。

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引用次数: 0

Microplastics lead to behavioral disorders in soil nematode movement, foraging and food choice 微塑料导致土壤线虫运动、觅食和食物选择的行为障碍

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-05-21 DOI: 10.1016/j.pedobi.2025.151054

Xuchao Zhang, Liliane Ruess

Generally, studies related to microplastic (MP) effects on soil nematodes use agar plate assays, while test conditions with soil are scarce. The overlooked fact is that nematodes can behave differently in their natural soil environment. This study investigated three common soil species, Acrobeloides buetschlii, Cephalobus sp., and Diploscapter coronatus, and the model nematode Caenorhabditis elegans in a modular soil system. The responses in movement, foraging and food choice to two MP types, i.e., non-biodegradable low-density polyethylene (LDPE) and a biodegradable blend of poly(lactic acid) and poly(butylene adipate-co-terephthalate) (PLA/PBAT), were evaluated. Additionally, food choice assays on agar plates were performed to compare these with the test under soil conditions. MP presence in soil reduced nematode movement, with the extent of effect depending on MP amount and nematode species. The foraging behavior of A. buetschlii and C. elegans was more affected by MP than that of Cephalobus sp. and D. coronatus. Soil phospholipid fatty acid analysis indicated that microbial diet was consumed by all nematodes, most prominent by D. coronatus in the presence of LDPE. The food choice index in soil was not dependent on MP type and nematode species, while on agar plate, it was affected by all factors: MP amount and type, nematode species and time. Linear regression revealed a dose-response relationship between the choice index on agar and increasing MP amounts. In conclusion, MPs in soil hampered nematode movement and had the potential to change food foraging and choice. The effects of MPs in agar plate and soil assays differed, highlighting the importance of using semi-natural test conditions. Finally, species-specific responses drive the ecological impact of MPs on soil nematodes.

一般来说，有关微塑料（MP）对土壤线虫影响的研究使用琼脂平板法，而土壤的试验条件很少。一个被忽视的事实是，线虫在自然土壤环境中可以表现出不同的行为。本研究在模数土壤系统中调查了3种常见的土壤物种：毛囊棘球线虫（Acrobeloides buetschlii）、头线虫（Cephalobus sp.）和冠状线虫（Diploscapter coronatus）以及模式线虫秀丽隐杆线虫（Caenorhabditis elegans）。研究了非生物可降解低密度聚乙烯（LDPE）和生物可降解聚乳酸-聚己二酸丁二酯-对苯二甲酸酯（PLA/PBAT）共混物两种聚乳酸/对苯二甲酸酯（PLA/PBAT）在运动、觅食和食物选择方面的反应。此外，在琼脂板上进行食物选择试验，将这些试验与土壤条件下的试验进行比较。土壤中MP的存在减少了线虫的运动，其影响程度取决于MP的数量和线虫的种类。小蠹蛾和秀丽隐杆线虫的觅食行为受MP的影响大于头蠹蛾和冠状螨。土壤磷脂脂肪酸分析表明，在LDPE存在的情况下，所有线虫都消耗微生物饲料，冠状棘球线虫消耗最多。土壤中的食物选择指数不受MP类型和线虫种类的影响，而琼脂板上的食物选择指数受MP数量和类型、线虫种类和时间等因素的影响。线性回归显示琼脂上的选择指数与MP量的增加呈量效关系。综上所述，土壤中的MPs阻碍了线虫的运动，并有可能改变食物的觅食和选择。MPs在琼脂平板和土壤试验中的效果不同，突出了使用半自然测试条件的重要性。最后，物种特异性反应驱动MPs对土壤线虫的生态影响。

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引用次数: 0

Conservation agriculture enhances soil biodiversity and fertility: Evidence from contrasting soil textures in Cambodia 保护性农业提高土壤生物多样性和肥力：来自柬埔寨土壤质地对比的证据

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-05-18 DOI: 10.1016/j.pedobi.2025.151053

Pao Srean , Didier Lesueur , Sophary Khin , Channaty Ngang , Sam Art Horn , Sreynget Lo , Sothea Rien , Fidero Kuok , Robert Martin , David R. Ader , Ricky M. Bates

Land use and farming practices significantly influence soil health. This three-year study evaluated the effects of transitioning from conventional tillage (CT) to conservation agriculture (CA) on soil properties and fauna communities in vegetable production systems in Battambang (clay loam) and Siem Reap (sandy loam), Cambodia. Soil samples (0–20 cm) were analyzed for physicochemical properties, soil macro- and meso-fauna abundance, richness, and diversity. CA significantly improved soil fertility, increasing nitrogen (N), phosphorus (P) and soil organic carbon. Soil mesofauna abundance, richness, and diversity increased under CA, particularly in Battambang, with Entomobryomorpha, Poduromorpha, Symphypleona and Diptera showing greater abundance. While CA had positive effects in Siem Reap, the improvement was less pronounced. Soil mesofauna response to CA varied by soil type, with clay loam soils exhibiting a greater positive response than sandy loam. These findings emphasize the significance of soil type in optimizing CA practices to improve soil health and mesofauna communities in these agroecological conditions.

土地利用和耕作方式显著影响土壤健康。这项为期三年的研究评估了从传统耕作（CT）向保护性农业（CA）过渡对柬埔寨马德望（粘土壤土）和暹粒（砂壤土）蔬菜生产系统中土壤特性和动物群落的影响。对土壤样品（0-20 cm）进行了理化性质分析，分析了土壤中、宏观动物的丰度、丰富度和多样性。CA显著提高了土壤肥力，增加了氮、磷和土壤有机碳。土壤中动物群的丰度、丰富度和多样性均有所增加，尤其是在马德望地区，昆虫苔藓目、豆科、合翅目和双翅目的丰度较高。虽然CA在暹粒有积极作用，但改善并不明显。土壤中系动物对CA的响应因土壤类型而异，粘土壤土比砂壤土表现出更大的正响应。这些发现强调了土壤类型在优化CA实践以改善这些农业生态条件下土壤健康和中游动物群落的重要性。

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引用次数: 0

The amount of soil used for DNA extractions has a minimal effect on characterization of microbial communities in a temperate agricultural region 在温带农业地区，用于DNA提取的土壤量对微生物群落的表征影响很小

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-04-28 DOI: 10.1016/j.pedobi.2025.151051

Linsey Van Koppen , Harini S. Aiyer , Jesse Davis , Julien Tremblay , Jillian D. Bainard , Luke D. Bainard

The ability to analyze soil microbial communities continues to improve with methodological advancements. The amount of soil used for DNA extractions to characterize the microbial community has been suggested to alter results. However previous efforts to quantify this variation have not always utilized consistent methodology, making it difficult to assess when and how the amount of soil impacts the results. In this study, we pooled technical replicates of DNA extractions using a standardized protocol with the most commonly used kit (i.e., 0.25 g starting soil weight with the Qiagen PowerSoil Pro kit) into five treatments: 0.25 g, 0.5 g, 1.0 g, 2.0 g, and 4.0 g to characterize the soil microbial communities from four distinct land use systems (grazed pasture, conventional forage, woodlot, and blueberry). Following DNA extraction, we assessed total DNA yield, fungal and bacterial abundance (qPCR), and alpha and beta diversity (amplicon sequencing) of the soil microbial community to determine the effect of soil weight on these metrics. Soil weight did not have a significant effect on any of these metrics. Land use system had a significant effect on all metrics except for prokaryotic Shannon diversity. The land use systems and the spatial organization within each system (i.e., field replicates) were easily distinguishable regardless of the amount of soil used to assess the samples. These results confirm the suitability of 0.25 g soil to accurately (and affordably) assess soil microbial communities in temperate agricultural soils, and accentuate the importance of methodological consistency within a study.

分析土壤微生物群落的能力随着方法学的进步而不断提高。用于提取DNA以表征微生物群落特征的土壤量已被建议改变结果。然而，以前量化这种变化的努力并不总是使用一致的方法，这使得很难评估土壤的数量何时以及如何影响结果。在这项研究中，我们使用最常用的试剂盒（即使用Qiagen PowerSoil Pro试剂盒，起始土壤重量为0.25 g）的标准化方案，将DNA提取的技术重复汇总为0.25 g, 0.5 g, 1.0 g， 2.0 g和4.0 g处理，以表征四种不同土地利用系统（放牧牧场，传统饲料，林地和蓝莓）的土壤微生物群落。在提取DNA后，我们评估了土壤微生物群落的总DNA产量、真菌和细菌丰度（qPCR）以及α和β多样性（扩增子测序），以确定土壤重量对这些指标的影响。土壤重量对这些指标均无显著影响。土地利用系统对除原核生物Shannon多样性外的其他指标均有显著影响。无论用于评估样品的土壤数量如何，土地利用系统和每个系统内的空间组织（即田间重复）都很容易区分。这些结果证实了0.25 g土壤在温带农业土壤中准确（且经济地）评估土壤微生物群落的适用性，并强调了研究中方法一致性的重要性。

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引用次数: 0

Legacy effects of nematodes: Experimental evidence on live individuals and their residues in shaping plant nutrient acquisition 线虫的遗留效应：活个体及其残留物在塑造植物营养获取中的实验证据

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-04-17 DOI: 10.1016/j.pedobi.2025.151052

Qian Chi , Yangxin Shi , Peng Wang , Mengmeng Wang , Yuanhu Shao , Shenglei Fu

Soil nematodes are crucial constituents of terrestrial ecosystems and strongly influence the growth of both plants and soil microbes. Using a controlled factorial experiment, we investigated the distinct effects of live nematodes and dead nematode residues on soil microbial biomass and plant nutrient dynamics. Our results demonstrated that both live nematodes and nematode residues reduce microbial biomass carbon and cause a transient decrease in microbial biomass nitrogen, while increasing plant leaf nitrogen content. These findings underscore the important influence of nematodes, irrespective of their life state, on plant and soil microbial nutrient acquisition. They also highlight the pivotal yet underappreciated role of nematode residues in shaping soil ecosystem processes, suggesting that nematode contributions extend beyond their lifespan.

土壤线虫是陆地生态系统的重要组成部分，对植物和土壤微生物的生长有重要影响。通过控制因子试验，研究了活线虫和死线虫残留物对土壤微生物生物量和植物养分动态的不同影响。我们的研究结果表明，活线虫和线虫残留物都减少了微生物生物量碳，并导致微生物生物量氮的短暂减少，同时增加了植物叶片氮含量。这些发现强调了线虫对植物和土壤微生物养分获取的重要影响，而不管它们的生命状态如何。他们还强调了线虫残留物在塑造土壤生态系统过程中的关键但未被重视的作用，这表明线虫的贡献超出了它们的寿命。

引用次数: 0

Soil matrix affects the determination of p-nitrophenol and the estimation of β-glucosidase, arylsulfatase, and acid phosphatase activities in subtropical soils 土壤基质影响亚热带土壤中对硝基酚的测定以及β-葡萄糖苷酶、芳基硫酸盐酶和酸性磷酸酶活性的测定

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-04-11 DOI: 10.1016/j.pedobi.2025.151050

Alexandre Bertoldo da Silva, Glaciela Kaschuk

Increased soil enzyme activity is an indicator of excellent soil health. The activities of soil β-glucosidase, arylsulfatase, and acid phosphatase are determined by quantifying p-nitrophenol, the product of degradation of p-nitrophenyl substrates during soil incubation. However, some p-nitrophenol may adsorb to the soil matrix, leading to underestimations of soil enzyme activities. This study aimed to verify the effects of soil matrices on p-nitrophenol determination and to evaluate their consequences on enzyme activity estimations. Soil samples were collected from 18 locations in the Plateau and Coastal regions of Paraná, Southern Brazil, covering various land uses and subjected to physical and chemical characterization. Three 500 mg soil aliquots from each composite sample per site were incubated following standard procedures. Three calibration curves were then applied: 1) Multiple Point External Standard, with six p-nitrophenol concentrations; 2) Multiple Point Standard Addition, with the same six p-nitrophenol concentrations plus soil; and 3) Single-Point Standard Addition, with a median p-nitrophenol concentration plus soil. Significant differences in the slope coefficients of the linear regressions between the Multiple Point External Standard curve and the Multiple Point Standard Addition curve were attributed to soil matrix effects, resulting in lower enzyme activity estimates. Principal Component Analysis indicated that the soil matrix effect was associated with fine-textured soils high in organic matter. Enzyme activities estimated using the Multiple Point Standard Addition curve did not differ from those obtained with the Single-Point Standard Addition curve, suggesting that both methods are suitable for correcting soil matrix effects. Despite this, results from the first two calibration curves were highly correlated (β-glucosidase, r = 0.8357; acid phosphatase, r = 0.9779; and arylsulfatase, r = 0.9962), suggesting that the soil matrix effect does not significantly impact the interpretation of soil enzyme activity values in soil health assessments.

土壤酶活性升高是土壤健康状况良好的标志。土壤β-葡萄糖苷酶、芳基硫酸酯酶和酸性磷酸酶的活性是通过对硝基酚的定量测定来确定的，对硝基酚是对硝基苯底物在土壤培养过程中降解的产物。然而，一些对硝基酚可能会吸附在土壤基质上，导致土壤酶活性被低估。本研究旨在验证土壤基质对对硝基酚测定的影响，并评估其对酶活性估计的影响。土壤样本从巴西南部帕拉纳高原和沿海地区的18个地点收集，涵盖各种土地利用并进行了物理和化学表征。按照标准程序从每个地点的每个复合样品中提取3个500 mg土壤分配液。采用三条校准曲线：1)多点外标，6种对硝基苯酚浓度；2)多点标准添加，用相同的六个对硝基苯酚浓度加上土壤；3)单点标准添加，对硝基苯酚中位数浓度加上土壤。多点外源标准曲线与多点标准添加曲线线性回归斜率系数的显著差异归因于土壤基质效应，导致酶活性估计值较低。主成分分析表明，土壤基质效应与有机质含量高的细质地土壤有关。用多点标准添加曲线估算的酶活与单点标准添加曲线估算的酶活没有差异，这表明两种方法都适用于校正土壤基质效应。尽管如此，前两条校准曲线的结果高度相关(β-葡萄糖苷酶，r = 0.8357；酸性磷酸酶，r = 0.9779；r = 0.9962)，说明土壤基质效应对土壤酶活性值在土壤健康评价中的解释没有显著影响。

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引用次数: 0

Short-term effects of microplastics and earthworms on greenhouse gases emissions from a sandy-loam soil 微塑料和蚯蚓对沙质壤土温室气体排放的短期影响

IF 2 3区农林科学 Q3 ECOLOGY

Pedobiologia

Pub Date : 2025-04-01 DOI: 10.1016/j.pedobi.2025.151036

Wenjing Ma , Daiyu Qiao , Huijie Lu , Carmelo Maucieri , Cancan Zhao , Lei Su , Yaojun Zhang

The widespread use of plastics in agriculture has led to the co-existence of microplastics (MPs) and earthworms in soil ecosystems. While both MPs and earthworms are known to influence soil greenhouse gas (GHG) emissions, their interactive effects on CO₂, N₂O, and CH₄ emissions remain poorly understood. To address this gap, a 21-day incubation experiment was conducted to examine the impact of MPs (0 %, 0.1 %, 0.5 %, 1 %) on soil GHG emissions in the presence and absence of earthworms. The results showed that MPs significantly reduced cumulative N₂O emission and enhanced CH₄ oxidation, with effects intensifying at higher concentrations, but had no significant effect on CO₂ emissions. In contrast, earthworms increased soil CO₂ and N₂O emissions while promoting CH₄ oxidation. MPs also lowered the global warming potential (GWP) by reducing N₂O emissions, whereas earthworms had an opposite effect. Interestingly, MPs reduced earthworm mortality in this study. Additionally, the interaction between MPs and earthworms significantly influenced soil pH and mineral N (NH₄⁺-N and NO₃^--N) content. These findings the critical role of earthworms in amplifying soil CO₂ and N₂O emissions and CH₄ oxidation. This study provides new insights into GHG emissions in sandy-loam soils under the combined influence of MPs and earthworms.

塑料在农业中的广泛使用导致土壤生态系统中微塑料（MPs）和蚯蚓共存。虽然已知MPs和蚯蚓都会影响土壤温室气体（GHG）排放，但它们对CO2、N2O和CH4排放的相互作用仍知之甚少。为了解决这一差距，进行了一项为期21天的孵化实验，以研究在蚯蚓存在和不存在的情况下，MPs（0 %、0.1 %、0.5 %、1 %）对土壤温室气体排放的影响。结果表明，MPs显著降低了N2O的累积排放，促进了CH4的氧化，且浓度越高，效果越明显，但对CO2的排放没有显著影响。蚯蚓增加了土壤CO2和N2O的排放，同时促进了CH4的氧化。MPs还通过减少一氧化二氮的排放来降低全球变暖潜能值（GWP），而蚯蚓则有相反的效果。有趣的是，在这项研究中，MPs降低了蚯蚓的死亡率。此外，MPs与蚯蚓的交互作用显著影响了土壤pH和矿质N （NH4+-N和NO3——N）含量。这些发现表明蚯蚓在增加土壤CO2和N2O排放以及CH4氧化中的关键作用。本研究对MPs和蚯蚓共同作用下的沙壤土温室气体排放提供了新的认识。

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引用次数: 0