Windstorms as mediator of soil nematode community changes: Evidence from European spruce forest
Windstorms as mediator of soil nematode community changes: Evidence from European spruce forest
复制标题
DOI：
10.1515/helm-2017-0004
复制
发表时间：
2017-03
期刊：
影响因子：
1
通讯作者：
M. Renčo;A. Čerevková
中科院分区：
文献类型：
--
作者：
M. Renčo;A. Čerevková
摘要对斯洛伐克High Tatra国家公园挪威云杉林中的线虫群落进行了为期数年(2006年和2013年)的监测。不幸的是，2014年5月，自然风暴破坏了森林。这一灾难性事件，加上初步获得的结果，使我们能够比较风暴破坏森林生境对土壤线虫群落的直接影响。风暴对森林的破坏对线虫总丰度、杂食和草食动物丰度以及线虫物种多样性都有显著影响。在所研究的样地中，优势种最多，占总线虫区系的55%，其次是甜菜圆角线虫、普通细管线虫、普通侧耳线虫、微小侧耳线虫和奇异圆线虫。风暴过后，食菌类的丰度显著增加，而杂食性、真菌食性、草食性、体外寄生虫和表皮/根毛食性动物的丰度则呈现相反的趋势。在评价指标中，香农物种多样性(H‘spp)、成熟度指数(MI)、成熟度指数2-5(MI2-5)、西格玛成熟度指数(ΣMI)、丰富度指数(EI)和结构指数(SI)在风暴过后显著降低。EI和SI指数表明，风暴前(2006-2013年)土壤生态系统处于轻度或中度干扰的成熟期，而在风暴(2014)之后不久，土壤生态系统退化，养分枯竭。这也与土壤食物网代谢足迹特征的图形化显示相对应。总体而言，在森林遭到破坏前后，线虫群落发生了显著的变化。这些结果表明，线虫群落作为环境条件质量或其破坏的指示器所起的作用。
Summary Nematode communities in a Norway spruce forest in High Tatra National Park, Slovakia were monitored for the period of several years (2006 and 2013). Unfortunately, in May 2014 natural windstorm damaged the forest. This disastrous event, together with preliminary obtained results allowed us to compare the direct impact of windstorm damage of forest habitat on soil nematode assemblages. The forest destruction by windstorm had a significant effect on the total nematode abundance, the abundance of omnivores and herbivores, as well as the nematode species diversity. The most dominant species, representing 55 % of the total nematode fauna, in the plot studied were Acrobeloides nanus followed by Malenchus exiguus, Filenchus vulgaris, Plectus communis, Plectus parvus and Tylencholaimus mirabilis. The abundance of bacterivorous signifi cantly increased after the windstorm, meanwhile the abundance of omnivores, fungivores, and herbivores ectoparasites and epidermal/root hair feeders showed an opposite trend. Of the evaluative indicators, Shannon species diversity (H’spp), maturity index (MI), maturity index 2-5 (MI2-5), sigma maturity index (ΣMI), enrichment index (EI) and structure index (SI) decreased significantly after windstorm. The EI and SI indexes characterized soil ecosystems before windstorm (2006 - 2013) as maturing with low or moderate disturbance, but soil ecosystems shortly after the windstorm (2014) were degraded and nutrient depleted. This also corresponded with graphical display of metabolic footprints characteristics of soil food web. Overall, the nematode communities differed significantly before and after forest damage. These results suggest the role of nematode communities as indicators of environment condition quality or its disruption.