自然保护与休闲部保护·守护·共享
自然保护与休闲部
目录中生混合硬木林
These mixed hardwood forests are widespread in mesic to submesic, infertile habitats throughout the Coastal Plain and Piedmont. Forests in this group occupy mesic uplands, ravines, lower slopes, and well-drained "flatwoods" on deep, acidic, relatively nutrient-poor soils. The most typical overstories contain mixtures of American beech (Fagus grandifolia), oaks (Quercus spp., varying by region), tulip-tree (Liriodendron tulipifera), and hickories (Carya spp.), but a wide variety of hardwood associates occur. American hornbeam (Carpinus caroliniana ssp. caroliniana and ssp. virginiana), flowering dogwood (Cornus florida), American strawberry-bush (Euonymus americanus) and American holly (Ilex opaca var. opaca) are prominent understory plants. In mesic "flatwoods" or "swamp islands" of the southeastern Virginia Coastal Plain, silky camellia (Stewartia malacodendron) and big-leaf snowbell (Styrax grandifolius) are characteristic small trees. These communities lack the lush herbaceous layers of Basic Mesic Forests, although species such as Christmas fern (Polystichum acrostichoides), New York fern (Parathelypteris noveboracensis), and white wood aster (Eurybia divaricata) may form moderately dense populations. Along with Christmas fern, downy rattlesnake-plantain (Goodyera pubescens), Virginia heartleaf (Hexastylis virginica), and partridge-berry (Mitchella repens) are frequent evergreen herbs in mesic mixed hardwood forests. The name "Southern Mixed Hardwood Forest" has been applied to some Coastal Plain representatives of this group. Although mesic mixed hardwood forests still cover sizeable areas east of the mountains in Virginia, their extent and compositional integrity have been reduced by agriculture, development, and repeated logging.
参考文献：Abrams 和 Copenheaver ( 1999 )、Adams等人( 2003 )、Coulling ( 1999 )、Crouch ( 1990 )、DeWitt 和 Ware ( 1979 )、Fleming ( 2002 a)、Fleming ( 2002 b)、Fleming 等人 ( 2007 )、Frost 和 Musselman ( 1987 )、McCoy 和 Fleming ( 2000 )、Monette 和 Ware ( 1983 )、Plunkett 和 Hall ( 1995 )、Walton等人( 2001 )、Ware ( 1970 )、Ware ( 1978 )、Ware ( 1991 )、Wolff 和 Ware ( 1994 )。
© DCR-DNH，加里·P·弗莱明。
该组由170定量地块样本（图1 ）代表，其中大多数支持两种分类类型中的第一个。尽管弗吉尼亚州东南部沿海平原的该群体的代表明显不同，但需要更多的文献资料和对其区域亲缘关系的澄清。北部沿海平原/山麓类型包含一些与地理相关的成分变化，以及明显的场地水分潜力的相当大的梯度，从非常中性的沟壑底部到中性的、凸起的上坡和山顶。然而，尽管有大量的定量数据，但尝试将该单位分成两个或多个类型或亚型的尝试却很难根据植物区系组成来证明其合理性。单击下面任何突出显示的 CEGL 代码即可查看NatureServe Explorer 提供的全球 USNVC 描述。
下载下面列出的每个社区类型的组成汇总统计电子表格。
