Pond

• What is one impact of using fertilizers on the surrounding landscape by farmers?

  Nutrient runoff into the ecosystem
• How does nutrient runoff affect plant growth?

  It causes plants and algae to grow more rapidly
• What happens to oxygen levels when plants grow at a much faster pace than usual?

  Oxygen levels decrease as algae take up oxygen
• What is a consequence of rapid plant growth on ecosystems?

  It leads to unstable ecosystems due to plant die-off
• What downstream problems can arise from further oxygen deprivation?

  Reduction in fish numbers
• How does dredging a pond affect the surrounding environment?

  It distributes sediment throughout the water
• What happens to algae levels when oxygen levels drop?

  Algae levels decrease
• What is the effect of reduced algae levels on fish populations?

  It leads to less food for fish, reducing their populations
• What can happen when a non-native species is introduced into an ecosystem?

  New species can outcompete original species
• What is the consequence of producers being unable to create enough food?

  It leads to a decline in the food chain
• How does a new predator affect the population of original species?

  Original species quickly deplete in numbers
• What is one effect of lower water levels in an ecosystem?

  Less space for organisms
• What is a consequence of reduced numbers of producers?

  Less food available in the ecosystem
• What can a period of drought lead to in terms of consumer populations?

  Some consumers, like fish and birds, may die
• How can acid rain affect water chemistry?

  It can damage soil and be too acidic for plants
• What is the impact of acid rain on primary consumers in the food web?

  It results in not enough food for primary consumers
• What are the potential impacts of extreme rainfall events leading to flooding?

  • Increased nutrient runoff
  • Altered habitats for aquatic life
  • Potential for soil erosion
  • Disruption of local ecosystems