Temperature and interspecific interactions drive differences in carbon use efficiencies and biomass stoichiometry among aquatic fungi
Temperature and interspecific interactions drive differences in carbon use efficiencies and biomass stoichiometry among aquatic fungi
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温度和种间相互作用导致水生真菌碳利用效率和生物量化学计量的差异
DOI：
10.1093/femsec/fiad021
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发表时间：
2023
影响因子：
4.2
通讯作者：
Gulis, Vladislav
中科院分区：
文献类型：
--
作者：
Tomczyk, Nathan J.;Rosemond, Amy D.;Whiteis, Ally M.;Benstead, Jonathan P.;Gulis, Vladislav
腐食性真菌在水环境中碳、氮、磷的转化过程中起着重要作用。然而，目前还不清楚变暖将如何改变C、N和P的真菌循环。我们用四种水生丝孢菌（四枝关节孢菌、毛枝Hydrocina chaetocladia、鞭毛孢菌，和Aquanectria penicillioides），以及相同分类群的组合，以测试温度如何改变C和养分利用。具体来说，我们评估了生物量增加，C：N，C：P，δ 13 C和C利用效率（CUE）在35天的实验中，温度范围从4ºC到20ºC。生物量积累和CUE的变化主要是二次曲线，峰值在7ºC和15ºC之间。H的C：P。在温度梯度下，毛枝藻的C：P值增加了9倍，而其它类群的C：P值不受温度的影响。C：N的变化在不同温度下相对较小。生物量δ 13 C随温度变化，表明碳同位素分馏的差异。此外，在生物量增加、C：P、δ 13 C和CUE方面，4种组合与基于单一栽培的零期望不同，表明分类群之间的相互作用改变了C和养分利用。这些结果表明，温度和真菌种间的相互作用可以改变影响碳和养分循环的性状。
Saprotrophic fungi play important roles in transformations of carbon (C), nitrogen (N), and phosphorus (P) in aquatic environments. However, it is unclear how warming will alter fungal cycling of C, N, and P. We conducted an experiment with four aquatic hyphomycetes (Articulospora tetracladia, Hydrocina chaetocladia, Flagellosporasp., andAquanectria penicillioides), and an assemblage of the same taxa, to test how temperature alters C and nutrient use. Specifically, we evaluated biomass accrual, C:N, C:P, δ13C, and C use efficiency (CUE) over a 35-d experiment with temperatures ranging from 4ºC to 20ºC. Changes in biomass accrual and CUE were predominantly quadratic with peaks between 7ºC and 15ºC. The C:P ofH. chaetocladiabiomass increased 9× over the temperature gradient, though the C:P of other taxa was unaffected by temperature. Changes in C:N were relatively small across temperatures. Biomass δ13C of some taxa changed across temperatures, indicating differences in C isotope fractionation. Additionally, the 4-species assemblage differed from null expectations based on the monocultures in terms of biomass accrual, C:P, δ13C, and CUE, suggesting that interactions among taxa altered C and nutrient use. These results highlight that temperature and interspecific interactions among fungi can alter traits affecting C and nutrient cycling.