quiz - mrs. connor's website st. james...
TRANSCRIPT
Quiz
What are the 3 main components of soil?
Explain the difference between weathering and erosion.
Define leaching. How is it related to acidification?
Plant Uses
Oxygen Food Store and clean water
Protect soil from erosion
Fire/Fuel
Materials Clothes Home/Shelter (building)
Medicine
Other Flowers – reproductive organs.
Fruits – ovaries of flowering plants which contain seeds.
Seeds – single unit of reproduction – embryonic plant.
Types
Angiosperms – flowering plants. Ex. Lily.
Gymnosperms – non-flowering plants. Ex. Pine tree.
Non-seed bearing plants include mosses and ferns. Both still
produce sexually through spores.
Plants can also reproduce asexually. Ex. grafting.
Problems - Invasive Species
An organism that is not native to a specific location that has been
introduced from another environment.
Tends to take over the new environment and cause problems for the native
plant and animal life. Ex. competition for resources.
Usually introduced by humans, but can continue to spread naturally.
¼ all plants in Canada are invasive species.
In Canada, $7.5 billion is lost each year due to forest and agricultural pests.
Invasive Species Facts First invasive species into North America came with European
settlers.
Today, invasive species to North America come from all over the
world by land, air, and sea.
Can be on purpose, ex. ornamental plants – purple loosestrife.
Can be by accident, ex. hidden seeds – leafy spurge.
Invasive Species Facts
Not all introduced species become invasive.
Most of the domestic crops we are familiar with are introduced species
that are not harmful. Ex. wheat.
When introduced species do not have any natural predators or
diseases in their new environment they have a competitive advantage
and can overtake the native species. This is when they become
invasive.
Invasive Plant Species in Manitoba
http://invasivespeciesmanitoba.com/site/index.php?page=t
errestrial-species#Category%201
Invasive Species Management
Prevent initial introduction of the invasive species.
Need to have a system of early detection and rapid response
(public reporting, education, weed supervisors).
Eradication (pulling, spraying, bio controls – introduce
predators).
Dutch Elm Disease First found in North America in 1930.
Introduced in logs from Europe.
A fungus that is spread by beetles,
which affects elm trees.
First see symptoms such as yellowing,
wilting, and curling of leaves.
Will eventually kill the entire tree.
Management of Dutch Elm Disease Sticky tree bands trap adult cankerworms, which lay their eggs on elm trees.
When cankerworms eat the foliage, it weakens the tree, making it more
attractive to elm bark beetles.
Cut down infected trees immediately (city employees – orange marks).
Properly dispose of elm firewood – buried.
Assignment
http://www.cbc.ca/news/canada/manitoba/city-of-winnipeg-axes-trees-program-to-fight-dutch-elm-disease-1.2997775
http://www.cbc.ca/news/canada/manitoba/assiniboine-park-s-grandma-elm-diseased-cut-down-1.2713865
Read both of the articles and watch both of the videos and write a page about the pros and cons of the removal of infected Dutch elm diseased trees and how they relate to the three sections of sustainability we have discussed – environment, society, and the economy.