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Effect of invasive Hovenia dulcis on microbial decomposition and diversity of hyphomycetes in Atlantic forest streams
Fungal Ecology ( IF 2.9 ) Pub Date : 2019-12-09 , DOI: 10.1016/j.funeco.2019.100890
Cristiane Biasi , Lucas Eugênio Fontana , Rozane Maria Restello , Luiz Ubiratan Hepp

The replacement of native vegetation in riparian areas by invasive species may cause homogenization, and change the quality of allochthonous material entering streams. It may also affect colonization by aquatic hyphomycetes, which are essential for leaf decomposition. We tested the effects of non-native Hovenia dulcis on aquatic hyphomycete communities in a field experiment, as well as the litter decomposition mediated by microbial decomposers. Our findings showed that: (i) the Hovenia leaves had a faster decomposition rate than a mixture of leaves from native species; (ii) fungal sporulation rates were lower on the invasive species; (iii) Hovenia reduced the beta diversity of aquatic hyphomycetes; (iv) Hovenia made a greater contribution to alpha diversity (across litter bags) than the native mix (i.e. higher species richness), but the contribution of the native mix to the community beta diversity (across streams) was high. Our results illustrated that the composition of the riparian forest had important effects on hyphomycete communities.



中文翻译:

入侵性金丝桃对大西洋森林溪流中微生物分解和菌丝多样性的影响

入侵物种代替河岸地区的原生植被可能导致均质化,并改变进入河流的异源物质的质量。它也可能影响水生丝菌的定殖,而水生丝菌对于叶片的分解至关重要。我们在野外试验中测试了非本地Hovenia dulcis对水生疏水菌群落的影响,以及由微生物分解剂介导的凋落物分解。我们的发现表明:(i)霍文尼亚叶的分解速率比来自本地物种的叶的混合物快;(ii)入侵物种的真菌孢子形成率较低;(iii)Hovenia降低了水生疏水菌的β多样性;(iv)ven相比本地混合饲料(即更高的物种丰富度),它对阿尔法多样性(跨垃圾袋)的贡献更大,但本地混合对社区β多样性(跨溪流)的贡献很大。我们的结果表明,河岸林的组成对菌丝群落具有重要影响。

更新日期:2019-12-09
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