4/1/2023 0 Comments Norway maple![]() The introduced Asian longhorn beetle ( Anoplophora glabripennis) has been found eating this tree, among numerous other species it has been widely introduced in North America but is viewed as invasive and has been intentionally eradicated from some areas. ![]() The introduced Norway Maple aphid ( Periphyllus lyropictus) is a specialist on this species, and it has been found in the U.S., both in the area around New York City, and in the northwest. It likely has unique defenses that make it harder for native insects specializing on maples to consume, such as the milky sap, a feature native maples lack. ↑Faunal AssociationsĪlthough native maples ( Acer sp.) support a variety of insects, and this species supports many insects in its native range, in North America it is eaten by few insects. Plants that are top-killed will resprout vigorously. In their native range, trees typically live to an age of about 150 years, possibly as long as 250 max lifespan in the wild in North America is not well-known but may be dramatically shorter. Germination is enhanced by soil disturbance, and inhibited somewhat by deep litter, but contact with mineral soil is not required. The samara is wider and flatter than most other maples. The seeds mature slowly and are not distributed until fall they are enclosed in a samara and are wind-dispersed. Flowering occurs in the spring, around when the tree is leafing out, and flowers are insect-pollinated. Some seeds are produced every year, but bumper crops may occur at 2-3 year intervals. Seed production tends to peak between 20 and 60 years of age. Seedlings in shade grow slowly and persist for years, until taking advantage of a gap.Īge of first seed production is variable seeds may be produced as young as 10 years but this may be much later in shade-suppressed trees. Seedlings are highly shade-tolerant and will grow even in low light conditions. Snow may protect seedlings from cold damage. Seedlings are vulnerable to temperature extremes sufficient cold can kill the young leaves, although the cotyledons are slightly more cold-tolerant than leaves. Seeds germinate in spring on the surface of the ground and spread their cotyledons true leaves are grown around 3 weeks after germination. Habitat preferences overlap with those of the native Sugar Maple ( Acer saccharum), and the two species can be found growing together, but Norway maple is more tolerant of urban conditions, including slightly drier and nutrient-poor conditions, pollution, and disturbance. Although its absolute tolerance of cold is high, it can be damaged by early severe cold in autumn. This species may be less adapted to North America's unpredictable climate than the more predictable, moderate climate of Europe. Most often found in small woodland fragments in suburbs and cities, near where it is planted, but has also invaded natural woodlands. ![]() It response to fire is not well-known.įound in a variety of different deciduous woodlands, and some mixed deciduous-coniferous woodland its range and prevalence may be expanding. It is rare on acidic soils, and has more stunted growth on sandy soils. ![]() It prefers deep and well-drained soils, high nitrogen availability, and mesic conditions. This tree is very shade tolerant, more so than all but a few deciduous trees in North America, but it can also tolerate high light conditions, even full sun, with sufficient moisture. The habitat requirements of this species in North America are not well understood. In its native habitat, Norway maple is primarily found in lowland areas and low uplands, and also grows in mixed deciduous/coniferous forest. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |