AP Bio ecosystem disruptions and invasive species
Study the impacts of ecosystem disruptions and invasive species on biodiversity and ecosystem stability. This includes understanding definitions, examples, mechanisms, and consequences relevant for AP Biology.
Quiz(80 questions)
1. What is the primary cause of habitat destruction in ecosystems worldwide?
Terms in this Study Set(80)
Ecosystem Disruptions(20)
Ecosystem disruption → definition
A significant change to an ecosystem due to human activity or natural events, leading to alterations in structure and function.
True or False: All ecosystem disruptions are caused by human activities.
False. Natural events like wildfires, hurricanes, and volcanic eruptions can also disrupt ecosystems.
Common cause of ecosystem disruption?
Pollution, habitat destruction, climate change, invasive species, and overexploitation.
Effect of deforestation on biodiversity?
Reduces habitat availability, leading to population declines and extinctions of various species.
Fill in the blank: Overfishing leads to __________.
decreased fish populations, altered food webs, and ecosystem imbalance.
Natural disaster impacts on ecosystems
Can lead to habitat destruction, altered water flow, and species displacement.
Eutrophication → definition
Nutrient enrichment of water bodies, often from runoff, leading to algal blooms and oxygen depletion.
Cause → effect of acid rain
Cause: Emission of sulfur and nitrogen oxides. Effect: Soil nutrient depletion and aquatic ecosystem damage.
How does climate change disrupt ecosystems?
Alters temperature and precipitation patterns, shifts species ranges, and affects seasonal cycles.
Question: What is habitat fragmentation?
The process where large habitats are broken into smaller, isolated patches, impacting species movement and gene flow.
True or False: Invasive species always enhance biodiversity.
False. They often outcompete native species, reducing biodiversity and altering ecosystem dynamics.
Impact of urbanization on ecosystems?
Leads to habitat loss, increased pollution, and altered species interactions and distributions.
Example of a direct ecosystem disruption?
Oil spills contaminate water, affecting marine life and altering food webs.
Comparison: Natural vs. anthropogenic disruptions
Natural: Driven by environmental forces (e.g., floods). Anthropogenic: Result from human actions (e.g., deforestation).
Define trophic cascades.
Disruptions at one trophic level that cause cascading effects throughout the food web.
Fill in the blank: Invasive plants often __________ native species.
outcompete, leading to reduced native plant diversity.
Effect of ocean acidification
Decreases calcium carbonate availability, impacting shellfish and coral reef survival.
What role do keystone species play?
They have a disproportionately large impact on their environment, maintaining the structure of the ecosystem.
True or False: Biodiversity loss is reversible.
False. While some recovery is possible, complete restoration of ecosystems is often unattainable.
Main cause of coral reef degradation?
Climate change, pollution, overfishing, and invasive species, leading to loss of biodiversity.
Invasive Species(20)
Invasive species definition
Non-native species that spread rapidly and disrupt local ecosystems. Examples include zebra mussels and kudzu.
Characteristics of invasive species
- High reproductive rates - Broad ecological tolerances - Lack of natural predators - High dispersal potential
Example of an invasive species in the U.S.
The Burmese python, which disrupts native wildlife in Florida.
True or False: All non-native species are invasive.
False. Not all non-native species cause harm; some coexist peacefully.
Impact of invasive species on biodiversity
They can outcompete native species for resources, leading to population declines or extinctions.
Fill in the blank: Invasive species often lack __________, allowing them to thrive.
natural predators and diseases.
Cause and effect of invasive species
Cause: Introduction of non-native species → Effect: Disruption of local food webs.
Comparison: Native vs. Invasive species
Native species: evolved in the ecosystem; Invasive species: introduced and harmful.
Example of an aquatic invasive species
The Asian carp, which threatens native fish populations in the Great Lakes.
Economic impact of invasive species
Costs U.S. economy approximately $120 billion annually in damages and control efforts.
True or False: Invasive species have no economic impact.
False. They can cause significant economic loss through damage to agriculture and fisheries.
How do invasive species affect habitat?
They alter habitats, reducing native plant cover and changing soil chemistry.
Example of an invasive plant species
Purple loosestrife, which displaces native wetland vegetation.
Invasive species and disease spread
They can introduce pathogens that affect native species, leading to declines.
Impact on food webs
Invasive species can disrupt trophic levels, leading to cascading effects on the ecosystem.
Fill in the blank: The __________ is a common invasive species in U.S. forests.
Emerald ash borer.
Name an invasive species impacting agriculture.
The corn earworm, which damages crops and reduces yields.
True or False: Invasive species can help restore ecosystems.
False. They typically harm rather than help ecosystems.
Kudzu's ecological impact
It outcompetes native plants for sunlight and nutrients, leading to decreased biodiversity.
Invasive species control methods
Physical removal, chemical treatments, and biological controls (e.g., introducing natural predators).
Ecological Consequences(20)
Ecological Consequence: Loss of Biodiversity
Loss of species due to invasive species can lead to ecosystem instability. Biodiversity is crucial for ecosystem resilience.
True or False: Invasive species can enhance ecosystem productivity.
False. Invasive species often outcompete native species, reducing overall productivity and biodiversity.
Biomagnification
The process where toxic substances accumulate in higher concentrations at higher trophic levels. Example: Mercury in fish.
Fill in the blank: Invasive species can lead to __________ of native species.
extinction
Question: How do invasive species affect nutrient cycling?
They disrupt nutrient cycling by altering soil composition and nutrient availability, affecting native plant growth.
Cause → Effect: Habitat Fragmentation
Causes isolation of species → Reduces genetic diversity and increases extinction risk.
Long-term effect of invasive plants
Alteration of fire regimes and water availability; example: Kudzu in the Southeastern U.S.
Comparison: Native vs. Invasive Species
Native: Evolved in region; Invasive: Introduced, disrupts ecosystem balance.
Question: What role do invasive predators play?
Invasive predators can decimate native prey populations, leading to trophic cascades and ecosystem changes.
Concept: Trophic Cascade
A process where the removal or addition of a top predator impacts multiple trophic levels below.
Impact of Invasive Species on Ecosystem Services
Reduction in services like pollination, water purification, and soil fertility, leading to economic and ecological consequences.
True or False: Ecosystem disruptions can lead to increased resilience.
False. Disruptions typically decrease resilience, making ecosystems more vulnerable to future changes.
Fill in the blank: The __________ of ecosystems can be altered by invasive species.
functionality
Long-term change: Algal Blooms
Nutrient runoff from invasive species impacts leads to algal blooms, reducing oxygen levels in water bodies.
Question: What happens to food webs with invasive species?
Food webs can become simplified, leading to loss of species and altered energy flow.
Term: Ecosystem Stability
Ecosystem stability is the ability to resist or recover from disturbances. Invasive species reduce this stability.
Cause → Effect: Overgrazing by Invasive Herbivores
Leads to soil erosion and loss of native plant species, impacting ecosystem structure.
Impact on Local Economies
Invasive species can disrupt local fisheries and agriculture, costing millions in management and lost revenue.
Long-term effect of climate change and invasives
Increases vulnerability of ecosystems, causing shifts in species distribution and habitat loss.
Long-term effects of invasive species on ecosystem structure?
- Altered species composition - Changes in nutrient dynamics - Disruption of trophic levels - Decreased ecosystem resilience - Potential extinction of native species - Altered habitat structure and function.
Management and Prevention(20)
What is prevention in invasive species management?
Prevention involves strategies to avoid the introduction and establishment of invasive species. This can include: - Public education - Legislation - Import regulations - Early detection systems
True or False: Eradication is always the best solution for invasive species.
False. Eradication is often impractical or impossible; management strategies may focus on control instead.
What are biocontrol agents?
Biocontrol agents are natural predators, parasites, or pathogens used to control invasive species populations. Example: The use of the beetle, Galerucella calmariensis, to control purple loosestrife.
Fill in the blank: _____ is a technique for restoring ecosystems after invasive species removal.
Rehabilitation is a technique for restoring ecosystems after invasive species removal, often involving native species planting.
List three methods of controlling invasive species.
- Mechanical removal - Chemical control - Biological control
What is integrated pest management (IPM)?
IPM is a holistic approach that combines multiple control methods (biological, cultural, mechanical, and chemical) for managing invasive species sustainably.
Comparison: Prevention vs. Management.
Prevention: Focuses on stopping invasives before they arrive. Management: Involves controlling and mitigating impacts of established invasives.
What role do native species play in ecosystem restoration?
Native species provide ecosystem stability, support biodiversity, and enhance resilience. Restoring native populations is crucial for successful ecosystem recovery.
True or False: Chemical controls are always environmentally safe.
False. Chemical controls can harm non-target species and ecosystems if not used carefully.
What is the purpose of habitat restoration?
Habitat restoration aims to return ecosystems to their original state, improving biodiversity and ecological function after disruption.
Cause → Effect: Overgrazing by invasive species.
Overgrazing leads to soil erosion, loss of native plant species, and increased vulnerability to other invasives.
What is the significance of monitoring in invasive species management?
Monitoring helps track the effectiveness of management strategies and detect new invasives early, allowing for timely intervention.
List two legislative measures for managing invasives.
- Lacey Act (1900): Prohibits trade of invasive species. - Federal Invasive Species Council (1999): Coordinates federal efforts.
What are the challenges of invasive species eradication?
Challenges include: - Economic costs - Ecological risks of removal - Difficulty in complete eradication - Potential for reinvasion
Fill in the blank: _____ control is often used as a last resort in invasive management.
Chemical control is often used as a last resort in invasive management due to potential side effects.
What is restoration ecology?
Restoration ecology is the scientific study of repairing disturbed ecosystems through active intervention and restoration techniques.
List three ecological benefits of managing invasive species.
- Improved biodiversity - Enhanced ecosystem services - Increased resilience to environmental changes
True or False: Only governments can manage invasive species.
False. Community involvement, NGOs, and researchers also play crucial roles in managing invasive species.
What is the role of public awareness in prevention?
Public awareness raises understanding of invasive species threats, promoting responsible behavior and community involvement in prevention efforts.
What are two key strategies for ecosystem restoration?
- Reintroduction of native species - Habitat reconstruction and enhancement
Questions in this Study Set(80)
1. What is the primary cause of habitat destruction in ecosystems worldwide?
2. What is a primary ecological consequence of invasive species on native biodiversity?
3. What is the primary characteristic of an invasive species?
4. What is a primary goal of prevention in invasive species management?
5. Which of the following is an example of a natural ecosystem disruption?
6. True or False: Invasive species can contribute positively to ecosystem services.
7. Which of the following is NOT a characteristic of invasive species?
8. True or False: Managing invasive species typically requires only one method of control to be effective.
9. What is eutrophication primarily caused by?
10. What describes the process of biomagnification?
11. Which species is a well-known invasive species in the U.S. that threatens local wildlife?
12. Which of the following is an example of a biocontrol agent?
13. Which of the following is NOT a consequence of pollution?
14. Fill in the blank: Invasive species can cause the __________ of local ecosystems.
15. True or False: All non-native species are considered invasive.
16. Fill in the blank: _____ involves the reestablishment of native species in an area after invasive species removal.
17. How does climate change disrupt ecosystems?
18. How do invasive species typically affect nutrient cycling?
19. What effect do invasive species have on biodiversity?
20. What is one common method of controlling invasive species populations?
21. What is habitat fragmentation?
22. Cause → Effect: Habitat fragmentation leads to __________.
23. Fill in the blank: Invasive species often lack __________, which contributes to their success.
24. What does integrated pest management (IPM) emphasize?
25. Which term describes the significant impact of one species on an ecosystem's structure?
26. What is a long-term effect of invasive plants like kudzu in the Southeastern U.S.?
27. What is a common cause of invasive species introduction?
28. Comparison: What is the main difference between prevention and management of invasive species?
29. Which is a potential effect of overfishing?
30. Which is NOT a characteristic distinguishing native species from invasive species?
31. Which of the following is an example of an aquatic invasive species?
32. Which of the following is NOT a benefit of restoring native species?
33. True or False: All invasive species are detrimental to ecosystems.
34. What role do invasive predators have in ecosystems?
35. What is the economic impact of invasive species in the U.S.?
36. True or False: Chemical controls are always effective and safe for non-target species.
37. Fill in the blank: Urbanization often leads to __________.
38. What defines a trophic cascade?
39. True or False: Invasive species can lead to economic benefits.
40. What is the purpose of monitoring in invasive species management?
41. Which of the following is a direct result of acid rain?
42. How do invasive species impact ecosystem services?
43. How do invasive species affect habitats?
44. Which legislative act prohibits the trade of invasive species in the United States?
45. What is a common consequence of deforestation?
46. True or False: Ecosystem disruptions can increase resilience.
47. Which plant species is known to be invasive in U.S. wetlands?
48. What is a significant challenge in the eradication of invasive species?
49. Which of the following describes the process of invasive species outcompeting native species?
50. Fill in the blank: The __________ of ecosystems is often reduced by invasive species.
51. What role do invasive species play in disease spread?
52. Fill in the blank: _____ is often required before implementing chemical controls to manage invasive species.
53. True or False: Biodiversity loss can be reversed in all cases.
54. What effect can nutrient runoff from invasive species lead to?
55. What is the impact of invasive species on food webs?
56. What is the goal of restoration ecology?
57. What type of ecosystem disruption is caused by oil spills?
58. What happens to food webs when invasive species are introduced?
59. Fill in the blank: The __________ is a common invasive species in U.S. forests.
60. List one ecological benefit of effective invasive species management.
61. Which of the following factors contributes to coral reef degradation?
62. What is ecosystem stability?
63. Which of the following is an invasive species impacting agriculture?
64. True or False: Only government agencies have the authority to manage invasive species effectively.
65. What effect does ocean acidification have on marine organisms?
66. Cause → Effect: Overgrazing by invasive herbivores leads to __________.
67. True or False: Invasive species can help restore ecosystems.
68. What role does public awareness play in preventing invasive species?
69. Which of the following is NOT a common cause of ecosystem disruptions?
70. What is a potential economic impact of invasive species?
71. What is the ecological impact of kudzu?
72. Which of the following is a key strategy for ecosystem restoration?
73. What is the primary consequence of habitat fragmentation on animal populations?
74. What long-term effect do climate change and invasive species have on ecosystems?
75. Which method is commonly used for controlling invasive species?
76. What is an important aspect of habitat restoration?
77. Which of the following is an example of an anthropogenic ecosystem disruption?
78. Which of the following best describes the impact of invasive species on food webs?
79. Which of the following statements accurately describes the impact of the emerald ash borer on native ecosystems?
80. Which of the following is NOT a common strategy in the prevention of invasive species?
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