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An annotated vascular flora and floristic analysis of the Nature Conservancy Davis Mountains Preserve, Jeff Davis County, Texas.

机译：德克萨斯州杰夫·戴维斯县自然保护区戴维斯山自然保护区的带注释的维管束植物区系分析。

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摘要

The Nature Conservancy Davis Mountains Preserve (DMP) is located 40 km north of Fort Davis, Texas, in the northeastern region of the Chihuahuan Desert and consists of some of the most complex topography of the Davis Mountains, including their summit, Mount Livermore, at 8378 ft (2554 m). The cool, temperate, "sky island" ecosystem caters to the requirements that are needed to accommodate a wide range of unique diversity, endemism, and vegetation patterns, including desert grasslands and montane savannahs. Dominant species of these higher elevation forests include Juniperus deppeana (alligator juniper), Quercus grisea (grey oak), Q. gravesii (Chisos red oak), Q. hypoleucoides (silverleaf oak), Pinus cembroides (Mexican pinyon), P. ponderosa (ponderosa pine), and P. strobiformis (southwestern whitepine).;The current study began in May of 2011 and aimed to catalogue the entire vascular flora of the 18,360 acres of Nature Conservancy property south of Highway 118 and directly surrounding Mount Livermore. Previous botanical investigations are presented, as well as biogeographic relationships of the flora. The numbers from herbaria searches and from the recent field collections combine to a total of approximately 2,153 voucher specimens, representing 473 species, 286 genera, and 85 families. The best-represented families are Asteraceae (87 species, 18.6% of the total flora), Poaceae (77 species, 16.2% of the total flora), and Fabaceae (21 species, 4.4% of the total flora). The subsequent analysis of the results, compared to those of previous regional-flora catalogues, presents the flora of the DMP as one that is unique to the higher elevations and igneous substrates of western Texas and the northern Chihuahuan Desert. Multiple influences from overlapping and neighboring ecoregions, including the Great Plains, Madrean, and Sonoran provinces, are all seen to have varying degrees of authority in regards to the shaping of the modern-day vegetation.
机译：大自然保护区戴维斯山脉保护区（DMP）位于德克萨斯州戴维斯堡以北40公里，位于奇瓦瓦沙漠的东北地区，由戴维斯山脉最复杂的地形组成，包括山顶利弗莫尔山（Mount Livermore）。 2554 m（8378英尺）。凉爽，温带的“天空岛”生态系统可以满足各种独特多样性，地方特有性和植被模式（包括沙漠草原和山地稀树草原）的需求。这些高海拔森林的主要物种包括杜松杜松（Juniperus deppeana），灰栎（Quercus grisea），红橡栎（Chisos red oak），次生栎（Q. hypoleucoides）（银橡树），松柏松（Cinebroides）（墨西哥松子），美国黄松（P. purerosa）。目前的研究始于2011年5月，旨在对118号高速公路以南和利弗莫尔山周围的18360英亩自然保护区的全部维管束进行分类。介绍了以前的植物学调查，以及该植物群的生物地理关系。来自草本植物搜索的数量和来自最近田间采集的数量合在一起，总共构成了大约2153个凭证标本，代表473种，286属和85个科。代表性最强的科是菊科（87种，占植物总数的18.6％），禾本科（77种，占植物总数的16.2％）和豆科（21种，占植物总数的4.4％）。与之前的区域植物区系目录的结果相比，对结果的后续分析显示，DMP的植物区系是德克萨斯州西部和奇瓦瓦沙漠北部较高海拔和火成岩底物特有的。来自重叠地区和邻近生态区的多重影响，包括大平原，马德雷安和索诺兰省，在塑造现代植被方面都具有不同程度的权威。

著录项

  • 作者

    Keeling, Jeffrey James.;

  • 作者单位

    Sul Ross State University.;

  • 授予单位 Sul Ross State University.;
  • 学科 Biology Botany.
  • 学位 M.S.
  • 年度 2014
  • 页码 296 p.
  • 总页数 296
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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