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15-16-18 Mile Creek - Niagara Peninsula Conservation Authority

15-16-18 Mile Creek - Niagara Peninsula Conservation Authority

TABLE 2: SIGNIFICANT

TABLE 2: SIGNIFICANT FLORA NATIONALLY AND PROVINCIALLY RARE Small Beggarticks Pignut Hickory Wild Chestnut Tulip Tree Pin Oak Provincially Rare Sedge (Carex artitecta) Sedge (Carex hirsutella) REGIONALLY RARE Yellow Giant Hyssop Ebony Spleenwort Wild Yam Hairy Wild-rye Muhly Grass Virginia Creeper Chinquapin Oak Water Pimpernel Table 2: significant flora rare and endangered species are found in the Carolinian life zone (Johnson 2005). The ANSI supports 60 southern species, with most of these species entirely or largely confined to the Carolinian life zone. For example, typical Carolinian species include Sassafras, Wild Yam, Shagbark Hickory, Pignut Hickory, Wild Chestnut, Tulip Tree, Pin Oak, Black Oak, and Flowering Dogwood, which tend to occur on sites with warmer microclimates such as south and west facing slopes. In 1992, a total of 482 species of vascular plants were reported in the Fifteen-Sixteen Mile Creek Valleys ANSI of which 360 species are native and 122 species are introduced. In addition, the ANSI supports rare and otherwise significant flora. Five species are considered nationally and provincially rare and 2 species are provincially rare. Another 8 species are considered rare in the Ministry of Natural Resources “old” Central Region (OMNR 1992) in this portion of the watershed. An additional 23 species are considered locally significant, which means there are 5 or less stations in Regional Niagara. All rare and significant species are reported in Table 2 (after Ontario Ministry of Natural Resources 1992). The Upper Rockway Escarpment is an environmentally sensitive area that is part of the Fifteen and Sixteen Mile Creek Valleys ANSI. Located on the Niagara Escarpment, it provides a linkage to other escarpment sites. Numerous and diverse biological communities related to a series of geomorphological features and associated habitats, such as upland forest, successional margin and exposed bedrock scarp characterize the area. The Upper Rockway Escarpment site contains a waterfall measuring approximately 8 metres high. This 295 hectare site contains 24 different tree species. Some of the more notable species that make up this diverse area include Eastern Cottonwoods, Hemlock and White Pine. Other species include Black Walnut, Butternut, Juniper, Black Cherry, Pin Cherry, Yellow Birch, Black Ash, Red Ash, White Ash, Rock Elm, Sugar Maple and Red Oak. Rockway Falls is also part of the Fifteen and Sixteen Mile Creek Valleys ANSI. This site contains one of the best terrace-valley complexes on the Niagara Peninsula. Measuring approximately 105 hectares, Rockway Falls is part of the continuous forested area of the Upper Rockway Escarpment Environmentally Sensitive Area. The valley is dominated by a Maple/Hickory association and a Maple/Beech association is common above. Other species found in this part of the ANSI include Butternut, Basswood, White Elm, Slippery Elm, White Oak, Red Oak, White Birch, Eastern Red Cedar, Pignut Hickory, Black Willow, Flowering Dogwood, Sugar Maple, Black Cherry and the rare Canada Plum. 18

Figure 10: Cores and connections of carolinian canada 19

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