PLANT COMMUNITIES AND ENVIRONMENTAL INTERRELATIONSHIPS IN A PORTION OF TILLAMOOK BURN NORTHWESTERN OREGON
PLANT COMMUNITIES AND ENVIRONMENTAL INTERRELATIONSHIPS IN A PORTION OF TILLAMOOK BURN NORTHWESTERN OREGON
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DOI：
10.2307/1933554
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发表时间：
1968-01-01
期刊：
影响因子：
4.8
通讯作者：
POULTON, CE
中科院分区：
文献类型：
--
作者：
BAILEY, AW;POULTON, CE
在1933年、1939年和1945年被森林大火烧毁的地区，对主要的焚烧后植物群落进行了特征描述和环境关系调查。在3次森林火灾后，森林植被的发育是可分类的，群落与环境因子的关系是一致的。不耐荫的早熟种和耐荫的晚熟种或高峰种都表现出对生长和生存的特殊环境要求。记录了42个林分的物种组成和优势度数据。六个同伙被认出。赤杨/赤杨主要发生在海拔1,200英尺以下、朝北的较低坡位上。这些林分通常占据着赫布雷或阿斯托里亚土壤系列的石质阶段。赤杨/小落叶悬钩子位于陡坡上，北向坡面，通常海拔略高于赤杨/垂穗悬钩子。这些林分主要与红壤系列的石质阶段有关。在700至1,200英尺的范围内发现的圆叶枫/小针茅，可随意地分为干物相和中生相。然而，社区通常与陡峭、较低的坡度位置相关联。它也被发现在石质相的血红石或阿斯托里亚土壤系列。小花悬钩子/宽叶悬钩子分布在陡峭的上坡位置和海拔1,200英尺以上的各个方面。它主要发生在基尔奇斯土壤系列上。在海拔1,200英尺以上的各方面，蕨菜/荷花的林分通常占据缓坡、中坡和上坡的位置。它是在深厚的、无石块的Hembre土壤系列中发现的。小叶越桔/白蜡树生长在700至2100英尺长的南向凸坡或山脊上。在该地区的所有土系中都不同程度地发生了这种情况。确认了两个临时群落：位于部分植被、朝南、露头岩石和距骨斜坡的大叶枫/红叶枫树群落，以及局限于溪流底部的大叶枫/红杉群落。讨论了植被异质性的一些原因，并提出了植被异质性的二分法。
Major post-burn plant communities were characterized and environmental relationships investigated on an area burned by forest fires in 1933, 1939, and 1945. Serai vegetation developing after 3 forest fires is classifiable, and the communities show consistent relationships to environmental factors. Both shade-intolerant, early seral species and shade-tolerant, late serai or climax species revealed specific environmental requirements for growth and survival. Species composition and dominance data were recorded in 42 stands. Six associes were recognized. The Alnus rubra/Polystichum munitum associes occurs predominantly below 1,200 ft elevation, on north-facing, lower slope positions. These stands usually occupy the stony phase of the Hembre or the Astoria soil series. The Alnus rubra/Rubus parviflorus associes is found on steeps north-facing slopes usually at slightly higher elevations than the Alnus/ Polystichum associes. These stands are predominantly associated with the stony phase of the Hembre soil series. The Acer circinatum/Poly-stichum munitum associes, found on all aspects between 700 and 1,200 ft, was arbitrarily classified into xeric and mesic phases. However, the community is usually associated with steep, lower slope positions. It is also found on the stony phase of the Hembre or the Astoria soil series. The Rubus parviflorus/Trientalis latifolia associes is found on all aspects, on steep, upper slope positions and above 1, 200 ft elevation. It occurs predominantly on the Kilchis soil series. Stands of the Pteridium aquilinum/Lotus crassifolius associes usually occupy gently, middle, and upper slope positions on all aspects above 1,200 ft elevation. It is found on the deep, stone-free Hembre soil series. The Vaccinium parvifolium/Gaultheria shallon associes is found on south-facing, convex slopes or ridgetops from 700 to 2,100 ft. It occurs to some degree on all soil series in the area. Two provisional associes were recognized: the Acer macrophyllum/Symphoricarpos mollis associes occupying partially-vegetated, south-facing, rock outcroppings and talus slopes, and the Acer macrophyllum/Alnus rubra associes limited to stream bottoms. Some of the causes of vegetation heterogeneity are discussed, and a dichotomous key to the vegetation is presented.