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The potential effect of high atmospheric CO2 on soil fungi-invertebrate interactions

机译：大气中高浓度二氧化碳对土壤真菌-无脊椎动物相互作用的潜在影响

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Litter mixtures of four meadow plant species, Cardamine hirsuta, Poa annua, Senecio vulgaris, and Spergula arvensis, were produced from laboratory model terrestrial ecosystems maintained at either ambient or enriched (ambient + 200 mumol mol(-1)) CO2 concentrations. The effect of litter source on the oviposition attractivity of fungi to the sciarid fly Lycoriella ingenua was tested for seven fungal species (Absidia glauca, Cladosporium cladosporioides, C. herbarum, Fusarium oxysporum, Penicillium arenicola, P. chrysogenum, and P. janthinellum). For all species, except F, oxysporum, oviposition attractivity increased when the fungi were growing on litter derived from CO2-enriched environments. The relative increase of the oviposition attractiveness of fungi growing on CO2-enriched litter differed substantially and resulted in a shift in sciarid fly oviposition preference. For example, when P. chrysogenum and C. herbarum grew on ambient litter, P. chrysogenum was more attractive; the opposite was true for mycelia growing on enriched litter. The effect of litter source on the suitability of four fungal species for larval development was also tested. In two species of fungi (A. glauca and C. herbarum) suitability was significantly higher if growing on CO2-enriched litter. With P. chrysogenum the opposite was true. The consequences of these rarely considered CO2-induced trophic interactions on ecosystem processes such as nutrient feedback cycles between plants and soil decomposition are considered.
机译：四种草甸植物的凋落物混合物是Cardamine hirsuta，Poa annua，Senecio vulgaris和Spergula arvensis，它们是从陆地模型生态系统中产生的，其维持在环境或富集（环境+ 200μmolmol（-1））的CO2浓度下。测试了七种真菌种类（Absidia glauca，Cladosporium cladosporioides，C.herbarum，Fusarium oxysporum，Anicolaium，niconicola，P.chrysogenum和P. janthinin）凋落物源对真菌对坐着的fly蝇Lycoriella ingenua的产卵吸引力的影响。当真菌在富含CO2的环境中生长的凋落物上生长时，除F，oxysporum以外的所有物种的产卵引诱力均增加。在富含CO2的垫料上生长的真菌的产卵吸引力的相对增加存在显着差异，并导致虫蝇产卵偏好发生变化。例如，当绿脓假单胞菌和植物标本蝇在环境垫料上生长时，绿脓假单胞菌更具吸引力。相反，对于富含垃圾的菌丝体则是正确的。还测试了凋落物来源对四种真菌物种对幼体发育的适应性的影响。如果在富含CO2的垫料上生长，则在两种真菌（A. glauca和C.herbarum）中的适应性要高得多。对于产黄青霉，情况恰恰相反。考虑了这些很少考虑的CO 2引起的营养相互作用对生态系统过程（如植物之间的养分反馈循环和土壤分解）的后果。

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