• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Limnologica >The replacement of native plants by exotic species may affect the colonization and reproduction of aquatic hyphomycetes
【24h】

The replacement of native plants by exotic species may affect the colonization and reproduction of aquatic hyphomycetes

机译：外来物种替代本地植物可能会影响水生菌丝的定殖和繁殖

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The tropical riparian zone has a high diversity of plant species that produce a wide variety of chemical compounds, which may be released into streams. However, in recent decades there has been an extensive replacement of tropical native vegetation by Eucalyptus monocultures. Our objective was to compare fungal colonization of Eucalyptus camaldulensis leaves with fungal colonization of native plant species from riparian zones in Brazilian Cerrado (savannah) streams. The fungal colonization and enzymatic activity significantly influenced leaf litter decomposition. Fungal sporulation rates from leaf litter varied significantly with leaf species, with E. camaldulensis showing the highest sporulation rate (1226 conidia mg(-1) AFDM day(-1))and leaf mass loss (23.2 +/- 0.9%). This species has the lowest lignin content and highest N concentration among the studied species. Among the studied native species, we observed the highest sporulation rate for Protium spruceanum (271 conidia mg(-1) AFDM day(-1)), Maprounea guianensis (268 conidia mg(-1) AFDM day(-1)) and Copaifera langsdorffii (196 conidia mg(-1) AFDM day(-1)). Overall, native plant species of the Brazilian Cerrado exhibited recalcitrant characteristics' and a higher lignin:N ratio. Therefore, variations in the physical and chemical characteristics of the leaf litter could explain the higher decay rate and reproductive activity observed for E. camaldulensis. However, the detritus of this species were colonized almost exclusively by Anguillospora filiformis (99.6 +/- 0.4%) and exhibited a reduction in aquatic hyphomycetes species diversity. Our results suggest that the disturbance in the composition of riparian vegetation and consequently, in the diversity of leaf litter input into streams, could change the patterns and rates of leaf litter utilization by microbial decomposers. These changes may have important consequences in the processing of organic matter and, consequently, in the functioning of freshwater ecosystems. (C) 2016 Elsevier GmbH. All rights reserved.
机译：热带河岸带植物种类繁多，可产生多种化学化合物，并可能释放到河流中。但是，近几十年来，桉树单一栽培已广泛替代了热带原生植被。我们的目的是比较巴西桉树（Savannah）河岸沿岸带的桉树叶的真菌定殖与河岸带的天然植物的真菌定殖。真菌的定植和酶活性显着影响叶片凋落物的分解。树叶凋落物的真菌孢子形成率随叶片种类的不同而有很大差异，E。camaldulensis显示最高的孢子形成率（1226分生孢子mg（-1）AFDM天（-1））和叶片质量损失（23.2 +/- 0.9％）。该物种在研究的物种中具有最低的木质素含量和最高的N浓度。在研究的本地物种中，我们观察到云杉Protium spruceanum（271分生孢子mg（-1）AFDM day（-1）），Maprounea guianensis（268分生孢子mg（-1）AFDM day（-1））和Copaifera的孢子形成率最高。 langsdorffii（196分生孢子mg（-1）AFDM天（-1））。总体而言，巴西Cerrado的本地植物物种表现出顽强的特性和较高的木质素：N比。因此，叶片凋落物的物理和化学特征的变化可以解释对卡马尔杜氏大肠杆菌观察到的较高的腐烂率和生殖活性。然而，该物种的碎屑几乎只被丝状鳗（Anguillospora filiformis）定殖（99.6 +/- 0.4％），并表现出水生丝菌物种多样性的降低。我们的研究结果表明，对河岸植被组成的干扰，以及由此导致的凋落物输入河流的多样性，可能会改变微生物分解者对凋落物利用的方式和速率。这些变化可能对有机物的加工，进而对淡水生态系统的功能产生重要影响。 （C）2016 Elsevier GmbH。版权所有。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号