invasive animals in temperate forest

Keystone species fall into several broad categories. Depending on the species and location, invasive plants can: Invasive species are the second-largest contributing factor causing native species to become at-risk of extinction in the United States. Priority must be placed on preventing the introduction of new species. Ranchers brought them to North America in the 1900s, hoping to raise them for their fur. While most of these plants have little environmental effect, some like the Scotch broom, Japanese knotweed, and Armenian (Himalayan) blackberry can escape into natural areas. Scientists estimate that between 5,000 and 10,000 species are traveling around the world in ballast water at any given time. Water hyacinth prevented sunlight from reaching underwater. Find information about invasive diseases here. Temperate Deciduous Forest Temperature The average daily temperatures range between -30C (-22F) and 30C (86F) with a yearly average of 10C (50F). These rain forests once stretched from southern Oregon to southeast Alaska, but little remains outside of protected areas.