Forest Diversity - 1485 Words

Discussion The distribution and presence of tree species within forests at various successional stages can be attributed to the shade tolerance of the tree. Late successional forests contain all age classes of trees growing in a multi-layered canopy where there is a high abundance of shade-tolerant species reproducing under their own shade. Therefore, it is logical that sugar maple, which is a very shade tolerant species is more frequently found in late successional stages according to figure 3. Likewise, sugar maple can occupy mid successional forests, but cannot endure high sunlight exposure of early successional habitats. Mid successional forests allow the growth of plants that are semi or shade tolerant such as sugar maple, red†¦show more content†¦Till parent materials are a mix of rocks, sand, silt and clay. In the Arboretum, most till sites were associated with mesic moisture regimes (Fig. 6) where water is removed at a moderate rate leaving the soil moist for short periods of t ime. Fluvial parent materials are mainly composed of sorted sand and are associated with sub-mesic moisture regimes as sand allows water to drain relatively rapidly. According to figure 4, sugar maple is largely associated with sub-mesic to mesic moisture conditions and should thus grow on both till and fluvial parent materials based on moisture regime only. However, Sugar Maple seems to only grow on till in the Morgan Arboretum (Fig. 4). Perhaps sand alone does not provide enough nutrients required for sugar maples to grow whilst the mixture of sand, silt and clay of till does. Conversely, wetter sites characterized by hygric or sub-hygric water regimes often have lacustrine parent materials (Fig. 6). These parent materials are made of clay which slows down drainage due to smaller pore size. However, Red Maple, Basswood and White Ash did not necessarily follow the â€Å"typical† moisture regime of each parent material. Red maple occupies mostly wet sites with moisture regime s that are sub-hygric to hygric overall, especially on glacial till where drainage is moderate. Furthermore, Red maple isShow MoreRelatedRelationship Between Functional Diversity And C Stocks On Different Forest Ecosystems1417 Words   |  6 Pages Relationships between functional diversity and C stocks in different forest ecosystems Recent studies focused on biodiversity have begun to include the concept of functional diversity, which measures the range, value, and distribution of functional traits of organisms in a community ecosystem (Tilman et al. 1997; Mouchet et al. 2010). 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