Reestablishment of endogonaceae on Mount St. Helens: survival of residuals
Reestablishment of endogonaceae on Mount St. Helens: survival of residuals
复制标题
圣海伦斯火山上内戈科植物的重建：残余物的生存
DOI：
10.2307/3793018
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发表时间：
1984
期刊：
影响因子：
2.8
通讯作者：
D. C. Andersen
中科院分区：
文献类型：
--
作者：
M. Allen;J. Macmahon;D. C. Andersen
1980年5月18日圣海伦斯火山喷发导致相对发育较好的土壤被埋在不同深度的无菌火山灰和火山灰下。1982年夏天，我们考察了一系列地点，并估计了通过非生物或生物媒介从埋藏的土壤转移到新地表的Endogonaceae孢子的数量。Endogone spp.的孢子数无差异。或球囊霉(Glomus spp.)在森林和伐木的埋藏土壤中，孢子在任何地点的苔藓中都很少见。在小于或等于50厘米的地区，孢子由地鼠(在以前的砍伐地区)和蚂蚁(在以前的森林和砍伐的栖息地)传播到地表。在浮石平原，一个没有地鼠和蚂蚁的地区，侵蚀使孢子暴露在地表。我们没有发现任何证据表明，内生真菌从埋藏的地平线上长回了根系。我们推测，大火山扰动之后的小范围扰动(侵蚀、地鼠和蚂蚁丘)可能通过暴露埋藏的菌根和分解真菌来驱动演替。参考文献26篇，附图2幅，表3篇。
The 18 May 1980 eruption of Mount St. Helens resulted in the burial of relatively well developed soils under variable depths of sterile tephra and ash. During summer 1982, we examined a series of sites and estimated the numbers of spores of Endogonaceae that had been transported from the buried soil to the new ground surface by either abiotic or biotic vectors. There was no difference between spore counts of Endogone spp. or Glomus spp. in the buried soils of forests and clear-cuts; spores were rare in the tephra at any site. In areas featuring less than or equal to 50 cm of tephra, spores were transported to the surface by gophers (in previous clear-cut areas) and by ants (in previous forest and clear-cut habitats). In the Pumice Plain, an area devoid of gophers and ants, erosion exposed spores to the surface. We found no evidence to suggest that endogonaceous fungi grow back up root systems from buried horizons. We hypothesize that small-scale perturbations (erosion, gopher and ant mounds) following the major volcanic disturbance may drive succession by exposing buried mycorrhizal and decomposer fungi. 26 references, 2 figures, 3 tables.