Problems introduced species can cause: out native populations. European Gypsy (2)
... i.e.- The chestnut blight fungus arrived in N.Y.C in the late 19th century on a nursery stock from Asia. In less than 50 years it spread over the eastern U.S., destroying virtually all chestnut trees. ...
... i.e.- The chestnut blight fungus arrived in N.Y.C in the late 19th century on a nursery stock from Asia. In less than 50 years it spread over the eastern U.S., destroying virtually all chestnut trees. ...
Document
... Habitat destruction is a leading cause of species extinction. The primary reason for this is the needed expansion of land for the human population. Humans have introduced countless species out of their natural range. The few introduced species that do well are superior competitors impact the habitat ...
... Habitat destruction is a leading cause of species extinction. The primary reason for this is the needed expansion of land for the human population. Humans have introduced countless species out of their natural range. The few introduced species that do well are superior competitors impact the habitat ...
Slow Worm - Scottish Environment LINK
... juveniles have dark flanks and, often, a stripe down the back. They can grow up to 40cm. These lizards love compost heaps, where their invertebrate prey thrives and are popular with gardeners due to their slug-eating habits. Slow Worms are widely distributed throughout Britain, however populations t ...
... juveniles have dark flanks and, often, a stripe down the back. They can grow up to 40cm. These lizards love compost heaps, where their invertebrate prey thrives and are popular with gardeners due to their slug-eating habits. Slow Worms are widely distributed throughout Britain, however populations t ...
Bot3404_11_week4.2
... technology into botanical collections and studies. A bit of plant ecology but will also allow you to practice identifying trees that you will see on a daily basis. ...
... technology into botanical collections and studies. A bit of plant ecology but will also allow you to practice identifying trees that you will see on a daily basis. ...
Decline in amphibian populations
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.