In an effort to counteract these adverse effects, the New Hampshire Department of Agriculture, Markets & Food (DAMF) has been given the authority ( RSA 430:51) to create rules ( Agr 3800) and regulations to preserve and protect the states economic integrity and ecological stability. Unfortunately, New Hampshire is not immune, every community in the state is currently impacted by at least one invasive plant and as the number of invasive populations grow so does the potential for greater dispersions. Within the United States, the adverse economic impacts resulting from invasive species currently exceeds $100 billion annually. Furthermore, studies have shown that invasives can reduce natural diversity, impact endangered or threatened species, reduce wildlife habitat, create water quality impacts, stress and reduce forest and agricultural crop production, damage personal property, and cause health problems. Other species as Norway maple - Acer platanoides or Tree of heaven - Ailanthus altissima rely on their ability to excrete toxic chemicals from their roots (called Allelopathy) that interfere with or prevent the establishment of native species within its rooting zone. In some instances the sheer density of an invasive species like Purple loosestrife - Lythrum salicaria, within a wetland ecosystem can affectively result in the loss of native flora and fauna normally found occupying those habitats. These traits combined allow certain non-native species such as Oriental bittersweet - Celastrus orbiculatus, Japanese barberry - Berberis thunbergii, and others to become highly competitive and dominant in many of New Hampshire's natural and artificial landscapes. The most common traits include the production of many offspring, early and rapid development, adaptability and tolerance of a broad range ofĮnvironmental conditions and, the lack of natural controls to keep them under control. ![]() Invasive species typically possess certain traits that give them an advantage over most native species. Throughout the United States and Canada, non-native invasive species have become an overwhelming problem resulting in impacts to the natural environment and managed landscapes. What is the state doing to educate the public? ![]() What regulations apply to invasive species in New Hampshire? Why are landscape plants such as Norway maple, Japanese barberry, and Burning bush considered invasive in New Hampshire? Which aquatic (those that occur in surface waters) species are considered invasive in New Hampshire? Which terrestrial (upland) plants are considered invasive in New Hampshire? This is a selection of a native North American species.What are the criteria used to determine which species warrant prohibition in New Hampshire? It is somewhat tolerant of urban pollution. It is not particular as to soil type, but has a definite preference for acidic soils, and is subject to chlorosis (yellowing) of the foliage in alkaline soils. It is quite adaptable, prefering to grow in average to wet conditions, and will even tolerate some standing water. This tree should only be grown in full sunlight. It grows at a medium rate, and under ideal conditions can be expected to live for 80 years or more. As it matures, the lower branches of this tree can be strategically removed to create a high enough canopy to support unobstructed human traffic underneath. It has a high canopy with a typical clearance of 7 feet from the ground, and should not be planted underneath power lines. October Glory Red Maple will grow to be about 50 feet tall at maturity, with a spread of 40 feet. October Glory Red Maple is recommended for the following landscape applications It has no significant negative characteristics. This is a relatively low maintenance tree, and should only be pruned in summer after the leaves have fully developed, as it may 'bleed' sap if pruned in late winter or early spring. Its average texture blends into the landscape, but can be balanced by one or two finer or coarser trees or shrubs for an effective composition. October Glory Red Maple is a deciduous tree with a shapely oval form. The furrowed silver bark and brick red branches add an interesting dimension to the landscape. ![]() The lobed leaves turn an outstanding red in the fall. It has green deciduous foliage which emerges red in spring. It features showy clusters of red flowers along the branches in early spring before the leaves. October Glory Red Maple is primarily valued in the landscape for its decidedly oval form. ![]() A popular selection of red maple with good form and excellent red fall color year after year a shapely large shade tree, perfect for larger landscapes, makes a fine street or boulevard tree intolerant of alkaline soils
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