Question

a. why are these new species harmful to the environment?
since they are new the can unstadle the food cain.
ex:a wolf comes in to a new area and eats all of the bunnys.know there are no bunny for the others to eat and no bunnys to eat plants.
b. how can people in a community work together to get rid of them?
move the wolf back to where it came from, and mabye and bard wires for it not to happen again.

1. what are the four ways people have harvested (gathered) oysters from the chesapeak bay? how does each method affect the water and the oyster habitat?

Explanation:

The problem is about oyster harvesting methods and their environmental impacts, which falls under Environmental Sciences (a subfield of Natural Science). To answer, we recall the four main oyster harvesting methods in the Chesapeake Bay:

1. Tonging: Using long-handled tongs. It can disturb the oyster bed but has less impact if done carefully.
2. Dredging: Using dredges to scoop oysters. It heavily disturbs the oyster habitat and stirs up sediment, reducing water clarity.
3. Hand - picking: Collecting oysters by hand. Minimal habitat disturbance but is labor - intensive and less efficient.
4. Aquaculture (Farming): Cultivating oysters. It can improve water quality as oysters filter water, and if managed well, has a positive or minimal negative impact on the natural habitat.

For each method, the effect on water (sedimentation, clarity, nutrient filtering) and oyster habitat (disturbance, creation of new habitats in aquaculture) is analyzed.

Answer:

The four ways people have harvested oysters from the Chesapeake Bay and their effects are:

1. Tonging:

• Method: Using long - handled tongs to grab oysters from the bay floor.
• Effect on water: Minimal sediment disturbance if done properly. Effect on oyster habitat: Can disturb the oyster bed, but less so than some other methods.

1. Dredging:

• Method: Dragging a dredge (a metal frame with a net) along the bay floor to collect oysters.
• Effect on water: Stirring up large amounts of sediment, reducing water clarity. Effect on oyster habitat: Significantly disturbs the oyster bed, damaging the habitat for other oysters and marine life.

1. Hand - picking:

• Method: Collecting oysters by hand, usually in shallow waters or from reefs.
• Effect on water: Little to no impact on water quality. Effect on oyster habitat: Minimal disturbance to the oyster habitat as it is a more selective and gentle method.

1. Aquaculture (Oyster Farming):

• Method: Cultivating oysters in controlled areas (e.g., cages, bags, or on racks) in the bay.
• Effect on water: Oysters filter water, improving water clarity and quality by removing nutrients and particles. Effect on oyster habitat: Can create new habitats if managed sustainably, and has a relatively low impact on natural oyster beds.