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6. True or False? A minor issue is the volume of invasive species that have been introduced to wetlands.

7. Why do invasive plant species thrive in wetlands?

8. Name two ways people try to control invasive plant species.

9. Undesired plants or weeds can be pulled in what two ways?

10. Why would it be a bad idea to introduce an animal that eats a hard-to-eradicate invasive plant to the area where the plant grows?

11. True or False? Once introduced, plant populations are well-established, and removal is a labor-intensive, ongoing task.

12. What drained wetlands past the point of return?

13. How were ditches created?

14. What is sheet flow?

15. Why is it so hard to level back out ditches when returning wetlands to their original state?

16. What does reconnecting floodplains, restoring backwaters, channels, and bends do?

17. What serves as a refuge and nursery for young fish and other aquatic life?

18. What do risers do?

19. Are culverts good for wetlands? Why or why not?

20. True or False? Tidal creek flow is maintained perfectly by culverts or pipes and allows full tidal flushing of these wetlands.

Answer :

Final answer:

Invasive species disrupt wetland ecosystems by outcompeting native plants and altering habitat conditions. Controlling these invaders involves methods such as mechanical removal and chemical treatment, but restoration poses significant challenges. Culverts can impede natural flow, affecting tidal flushing and overall wetland health.


Explanation:

Understanding Invasive Species in Wetlands

Invasive species are non-native plants or animals that can establish and spread in a new environment, often at the expense of native species. The volume of invasive species introduced to wetlands can significantly disrupt local ecosystems, leading to the decline of native biodiversity. This statement is True, as the introduction of these plants can also affect water quality, soil composition, and overall habitat health.

Reasons for Thrive in Wetlands

Invasive plant species tend to thrive in wetlands due to several factors:

  • Adaptability: Many invasive species have strong survival traits, allowing them to adapt quickly to wetland conditions.
  • Rapid Growth: These plants often grow faster than native species, outcompeting them for sunlight and nutrients.

Ways to Control Invasive Plant Species

People employ various methods to control invasive plants, including:

  1. Mechanical Removal: This involves physically removing the plants, which can be labor-intensive.
  2. Chemical Control: Herbicides can be used to kill invasive plants, but they may also harm native vegetation.

Destruction of Wetlands

Wetlands can be drained to a point of no return due to agricultural expansion and urban development, which destroy their natural habitats.

Ditches and Sheet Flow

Ditches are created through excavation, altering the natural flow of water in wetlands. Sheet flow refers to the slow, even distribution of water across the ground, which is essential for healthy wetland ecosystems.

Challenges in Restoration

Leveling ditches or restoring wetlands is challenging as it often requires considerable alterations to the landscape without suitable natural drainage.

The Importance of Floodplains

Reconnecting floodplains and restoring backwaters enhances biodiversity, providing habitats for various aquatic species, including young fish.

Role of Culverts

Culverts can hinder natural flow in wetlands, as they may not allow for full tidal flushing, which is necessary to maintain ecosystem health. Therefore, the statement that tidal creek flow is perfectly maintained by culverts is False.


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