• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Plant invasion and the soil microbial community: Interactions and implications for native plant performance and ecosystem function.
【24h】

Plant invasion and the soil microbial community: Interactions and implications for native plant performance and ecosystem function.

机译：植物入侵与土壤微生物群落：相互作用及其对本地植物性能和生态系统功能的影响。

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

Plant invasions present a serious threat to native ecosystem structure and function. Little is known about the role rhizosphere soil microbial communities play in facilitating or resisting the spread of invasive species into native plant communities. I examined if two invasive annual plants, Centaurea solstitialis (yellow starthistle) and Aegilops triuncialis (barb goatgrass), change the soil microbial community composition as they invade and whether invasion-induced changes in the soil community affect native plant performance or soil aggregation, an ecosystem function strongly influenced by microbial processes. The rhizosphere microbial communities of starthistle and goatgrass are different from those of five native species that may be competitively impacted by these invasive species in the field (Lotus wrangelianus, Hemizonia congesta, Holocarpha virgata, Plantago erecta, and Lasthenia californica). Rhizosphere microbial communities in newly invaded areas are more similar to the original native soil communities than are microbial communities in areas that have been invaded for several years. A greenhouse experiment found that L. californica performance was reduced when grown in goatgrass-invaded soil compared to native soil; whereas P. erecta and goatgrass performance were unaffected when grown in goatgrass-invaded versus native soil. Changing the soil microbial community in invaded areas may be a mechanism of increased plant invasion in some cases. A field study examined the effects of invaded soil microbial communities on soil aggregation. Root biomass, two fungal-derived carbon concentrations (glomalin-related soil protein (GRSP) and ergosterol), and aggregate mean weight diameter were measured in soils dominated by goatgrass, starthistle, or the native plants L. californica, P. erecta, and H. congesta. Root biomass tended to increase with invasion. GRSP concentrations varied with invasion and were either negatively or non-correlated with soil aggregation. There were no differences in ergosterol concentrations. Soil aggregation increased with goatgrass invasion, but did not increase with starthistle invasion. Abiotic factors may play a large role in aggregation of these highly-aggregated serpentine soils. Plant invasion-induced changes in the soil microbial community affect native plant performance and ecosystem function; these changes may promote future plant invasions and continued ecosystem change.
机译：植物入侵严重威胁着本地生态系统的结构和功能。根际土壤微生物群落在促进或抵抗入侵物种向本地植物群落扩散中所起的作用鲜为人知。我检查了两种入侵性一年生植物，矢车菊（黄色叫声）和尖顶羊草（倒钩山羊草）在入侵时是否改变了土壤微生物群落组成，以及入侵引起的土壤群落变化是否影响了本地植物的生长或土壤聚集，生态系统功能受到微生物过程的强烈影响。始哨和山羊草的根际微生物群落不同于五个原生物种的根际微生物群落，在该领域中这些入侵物种可能对这些入侵物种产生竞争性影响（莲属黄莲花，海地黄He，大鳞car，车前草和加州Last）。与已入侵多年的微生物群落相比，新入侵地区的根际微生物群落与原始原生土壤群落更相似。温室实验发现，在入侵山羊草的土壤中生长的加州乳杆菌性能比本地土壤低。当在入侵山羊草的土壤中生长时，直立假单胞菌和山羊草的性能不受影响。在某些情况下，改变入侵地区的土壤微生物群落可能是增加植物入侵的一种机制。现场研究检查了入侵的土壤微生物群落对土壤聚集的影响。在以山羊草，鸡叫声或本地植物加州乳杆菌，直立假单胞菌和天然植物为主的土壤中，测量了根生物量，两种真菌衍生的碳浓度（glomalin相关的土壤蛋白（GRSP）和麦角固醇）以及总平均重径。 H.拥塞。根系生物量倾向于随入侵而增加。 GRSP浓度随入侵而变化，与土壤聚集呈负相关或不相关。麦角固醇浓度没有差异。土壤团聚随着山羊草的入侵而增加，但并未随着始哨虫的入侵而增加。非生物因子可能在这些高度聚集的蛇形土壤的聚集中起很大作用。植物入侵引起的土壤微生物群落变化影响原生植物的性能和生态系统功能；这些变化可能会促进未来植物的入侵和持续的生态系统变化。

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