{"title":"密西西比北部一些高地森林的现状和预定居树种组成","authors":"J. Stephen Brewer","doi":"10.2307/3088666","DOIUrl":null,"url":null,"abstract":"compared present-day tree species composition of the two old-growth forests and the two younger forests with the composition of bearing trees (i.e., trees identified by land surveyors in the 1830s) in upland and lowland areas within townships encompassing the four sites. Bearing tree samples were similar in composition to an explorer's account of old-growth woodlands that dominated the region during sparse subsistence settlement by Chickasaw Indians. There were striking differences between present-day and bearing-tree samples. One of the old-growth forests (Bailey Woods) was more similar in species composition to the mid-successional secondgrowth forests than to bearing-tree samples. The shade-intolerant, but fire-tolerant, Quercus marilandica Muenchh. was nearly absent from present-day upland forests (< 1% of all stems 2 10 cm dbh; range 0-3%) but was the most common species among presettlement upland trees (42% of all bearing trees in the township containing the field sites). Liquidambar styraciflua L., often regarded as both a pioneer species and a common constituent of alluvial floodplain and mesophytic terrace forests, was the single most abundant tree species in the understory and midcanopy of one of the old-growth forests (Bailey Woods) and in all size classes of trees of both younger forests. It was completely absent from presettlement records of upland trees, but was an abundant bearing tree in nearby sections containing lowland alluvial forests. I hypothesize that open oak woodlands dominated the upland landscape of Lafayette County, Mississippi before extensive settlement. These woodlands were neither mid-successional nor late-successional forests but were a unique fire-dependent community type that is absent from north Mississippi today.","PeriodicalId":49977,"journal":{"name":"Journal of the Torrey Botanical Society","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2001-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2307/3088666","citationCount":"59","resultStr":"{\"title\":\"Current and presettlement tree species composition of some upland forests in northern Mississippi1\",\"authors\":\"J. Stephen Brewer\",\"doi\":\"10.2307/3088666\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"compared present-day tree species composition of the two old-growth forests and the two younger forests with the composition of bearing trees (i.e., trees identified by land surveyors in the 1830s) in upland and lowland areas within townships encompassing the four sites. Bearing tree samples were similar in composition to an explorer's account of old-growth woodlands that dominated the region during sparse subsistence settlement by Chickasaw Indians. There were striking differences between present-day and bearing-tree samples. One of the old-growth forests (Bailey Woods) was more similar in species composition to the mid-successional secondgrowth forests than to bearing-tree samples. The shade-intolerant, but fire-tolerant, Quercus marilandica Muenchh. was nearly absent from present-day upland forests (< 1% of all stems 2 10 cm dbh; range 0-3%) but was the most common species among presettlement upland trees (42% of all bearing trees in the township containing the field sites). 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引用次数: 59
摘要
将这两种原生林和两种年轻林的现今树种组成与四个地点周围城镇内高地和低地地区的树木组成(即19世纪30年代土地测量员确定的树木)进行比较。在契卡索印第安人稀疏的生存定居点期间,一个探险家对古老林地的描述与结果树样本的成分相似。现在的样本和结果树样本之间存在着显著的差异。其中一种原生林(贝利林)的物种组成与中期演替次生林的物种组成更相似,而与结果树样品的物种组成更相似。不耐阴,但耐火的栎。几乎不存在于今天的山地森林中(< 1%的所有茎2 10 cm dbh;范围0-3%),但在预先定居的山地树木中最常见(占包含田间立地的乡镇所有有结果树木的42%)。通常被认为是冲积洪泛平原和中生阶地森林的先驱物种和共同组成部分,是其中一种原生林(贝利森林)的林下和冠层中部以及两种年轻森林的所有大小级别中最丰富的树种。在高原树木的预定居记录中完全没有它,但在附近含有低地冲积林的剖面中却是一种丰富的结果树。我假设,在大规模定居之前,开放的橡树林地主导着密西西比州拉斐特县的高地景观。这些林地既不是中期演替森林,也不是晚期演替森林,而是一种独特的依赖火的群落类型,这在今天的北密西西比州是不存在的。
Current and presettlement tree species composition of some upland forests in northern Mississippi1
compared present-day tree species composition of the two old-growth forests and the two younger forests with the composition of bearing trees (i.e., trees identified by land surveyors in the 1830s) in upland and lowland areas within townships encompassing the four sites. Bearing tree samples were similar in composition to an explorer's account of old-growth woodlands that dominated the region during sparse subsistence settlement by Chickasaw Indians. There were striking differences between present-day and bearing-tree samples. One of the old-growth forests (Bailey Woods) was more similar in species composition to the mid-successional secondgrowth forests than to bearing-tree samples. The shade-intolerant, but fire-tolerant, Quercus marilandica Muenchh. was nearly absent from present-day upland forests (< 1% of all stems 2 10 cm dbh; range 0-3%) but was the most common species among presettlement upland trees (42% of all bearing trees in the township containing the field sites). Liquidambar styraciflua L., often regarded as both a pioneer species and a common constituent of alluvial floodplain and mesophytic terrace forests, was the single most abundant tree species in the understory and midcanopy of one of the old-growth forests (Bailey Woods) and in all size classes of trees of both younger forests. It was completely absent from presettlement records of upland trees, but was an abundant bearing tree in nearby sections containing lowland alluvial forests. I hypothesize that open oak woodlands dominated the upland landscape of Lafayette County, Mississippi before extensive settlement. These woodlands were neither mid-successional nor late-successional forests but were a unique fire-dependent community type that is absent from north Mississippi today.
期刊介绍:
The Journal of the Torrey Botanical Society (until 1997 the Bulletin of the Torrey Botanical Club), the oldest botanical journal in the Americas, has as its primary goal the dissemination of scientific knowledge about plants (including thallopyhtes and fungi). It publishes basic research in all areas of plant biology, except horticulture, with an emphasis on research done in, and about plants of, the Western Hemisphere.