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首页> 外文期刊>Pedobiologia >Temperature changes affect multi-trophic interactions among pines, mycorrhizal fungi, and soil nematodes in a microcosm experiment
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Temperature changes affect multi-trophic interactions among pines, mycorrhizal fungi, and soil nematodes in a microcosm experiment

机译：温度变化会影响微观微观实验中松树，菌根真菌和土壤线虫之间的多营养基相互作用

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Nematodes serve a key role in soil nutrient cycling by eating bacterial cells and fungal hyphae. However, little is known about how temperature changes affect multi-trophic interactions among host trees, root-associating fungi, and nematodes. The aim of this study was to identify abiotic and/or biotic factors that affect soil nematode communities. We constructed a pot microcosm with sandy soils from a coastal Pinus thunbergii forest. The soil-filled pots were incubated for 8 months at 20, 25, or 30 degrees C with or without pine seedlings. In the pots with seedlings, we measured the percentages of black, white, and brown ectomycorrhizal (ECM) formations on roots. Nematodes retrieved from the soils were morphologically identified to genus and differentiated by both trophic and community structures. The occurrence of ECM formation ranged from 85.7%-91.9%. Black ECM roots were significantly dominant at 30 degrees C (47.0 %), whereas white ones were significantly dominant at 20 degrees C (43.0 %) and 25 degrees C (53.0 %). The number of nematodes at 25 and 30 degrees C was significantly greater than that at 20 degrees C irrespective of the presence or absence of seedlings. In terms of trophic compositions, the relative abundance of fungivorous nematodes significantly increased from 10.4 % at 20 degrees C to 27.5 % at 25 degrees C to 44.6 % at 30 degrees C in the presence of pine seedlings. A non-metric multidimensional scaling scatter plot showed that the nematode communities clustered significantly among temperature treatments. Structural equation modeling indicated that nematode trophic compositions were directly regulated by temperature and the presence of pine seedlings. Our findings suggest that temperature has some cascading effects on the formation of nematode communities, and pine seedlings and associating ECM fungi contributed synergistically to the formation of their communities.
机译：Nematodes通过食用细菌细胞和真菌菌丝进行土壤营养循环的关键作用。然而，关于温度变化如何影响宿主树，根系关联真菌和线虫之间的多营养相互作用几乎熟知。本研究的目的是识别影响土壤线性社区的非生物和/或生物因素。我们建造了一个带有来自沿海丘比特森林的沙质土壤的锅微科。用松树幼苗在20,25℃，25℃下孵育1个土壤罐8个月。在具有幼苗的盆中，我们测量了根部上的黑色，白色和棕色喉（ECM）地层的百分比。从土壤中检索的线虫在形态学上鉴定给属的属，由营养和群落结构分化。 ECM形成的发生范围为85.7％-91.9％。黑色ECM根部在30摄氏度（47.0％）下显着显着，而白色在20摄氏度（43.0％）和25℃（53.0％）下显着显着显着。与幼苗的存在或不存在而言，25和30摄氏度的线虫数量明显大于20摄氏度。就营养组合物而言，在松树幼苗存在下，无菌线虫的相对丰度在20摄氏度下在25℃下以20℃的10.4％增加至27.5％至44.6％。非公制多维缩放散射图显示，线虫社区在温度处理中显着聚集。结构方程模型表明，线虫滋养剂组合物通过温度和松树幼苗的存在直接调节。我们的研究结果表明，温度对线虫社区的形成具有一些级联效应，松树苗和关联ECM真菌协同促进了它们的社区的形成。

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