The role of mycorrhizal fungi and microsites in primary succession on Mount St. Helens.
The role of mycorrhizal fungi and microsites in primary succession on Mount St. Helens.
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DOI：
10.2307/2446330
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发表时间：
1998-03
影响因子：
3
通讯作者：
J. Titus;R. Moral
中科院分区：
文献类型：
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作者：
J. Titus;R. Moral
本研究旨在探讨泡囊丛枝菌根（VAM）和微位点对先锋物种生长的作用。在圣海伦斯山浮石平原的贫瘠地区的地块上，建立了平坦、细沟、近岩和死亡的羽扇豆微生境。将VAM繁殖体添加到一半地块的土壤中。将六个先锋物种种植到VAM和非VAM接种的微位点中。植物在死羽扇豆微网站的生物量大于那些在平坦，细沟，近岩石微网站。VAM对植物生物量没有显著影响。微点仍然是重要的植物定居在浮石平原，但VAM还没有出现发挥重要作用。这可能是由于有限的养分供应和寄生植物物种的兼性真菌营养性质。这是不太可能的，VAM在演替过程中发挥重要作用，在新安置的营养贫乏的表面。
This study was designed to examine the role of vesicular-arbuscular mycorrhizae (VAM) and microsites on the growth of pioneer species. Flat, rill, near-rock, and dead lupine microsites were created in plots in barren areas of the Pumice Plain of Mount St. Helens. VAM propagules were added to the soil in half of the plots. Six pioneer species were planted into both VAM and non-VAM inoculated microsites. Plants in dead lupine microsites were greater in biomass than those in flat, rill, and near-rock microsites. Significant effects of VAM on plant biomass did not occur. Microsites continue to be important to plant colonization on the Pumice Plain, but VAM do not yet appear to play an important role. This may be due to limited nutrient availability and the facultatively mycotrophic nature of the colonizing plant species. It is unlikely that VAM play an important role in successional processes in newly emplaced nutrient-poor surfaces.