Changes in Ecosystems
What happens if a new predator is introduced to an ecosystem?
It can reduce the populations of native species.
How does the removal of plants affect the soil?
Less organic matter is added to the soil, decreasing nutrient levels.
What happens to energy flow if a primary producer is removed?
It decreases, as there are fewer resources for primary consumers.
What would happen if a lake dries up?
Aquatic life may decrease; land animals might increase.
What might happen to a forest if a disease kills many trees?
Fewer producers lead to less energy and matter cycling.
What is the effect of a drought on a grassland ecosystem?
Plants may die or go dormant, and animal populations may decline.
What happens to nutrient cycling if decomposers are reduced?
Nutrients remain locked in undecomposed material, not returning to the soil.
How does the absence of carnivores affect energy flow in a food web?
ncreased herbivore populations may lead to overgrazing.
How would the construction of a dam impact a river ecosystem?
Changes water flow and habitat; affects aquatic and terrestrial life.
Predict the effect of a wildfire on a woodland food web.
Initial reduction in species, followed by new growth and possibly new species dynamics.
What happens if an invasive plant species takes over an area?
It can outcompete native species, altering the ecosystem structure.
How does pollution impact the cycling of matter in an ecosystem?
Pollutants can accumulate in the food web, disrupting processes.
What happens to energy flow when a key herbivore species declines?
Energy flow to higher trophic levels is reduced.
What changes occur if bees are significantly reduced in an area?
Reduction in plant pollination and fruit/seed production.
How would the introduction of a non-native fish affect a lake ecosystem?
It could disrupt local species, potentially leading to declines in native fish.
What impact does excessive fertilizer use have on aquatic ecosystems?
Can lead to eutrophication, causing algae blooms and dead zones.
What effect does overgrazing have on the cycling of matter?
Soil degradation and reduced plant growth affect nutrient availability.
What would happen if a large number of decomposers were suddenly added to an ecosystem?
Accelerated decomposition, possibly depleting organic matter quickly.
What occurs if a major river is polluted?
Pollution affects water quality, impacting aquatic and land species.
Predict the consequences of removing a wetland for agriculture.
Loss of biodiversity, changes in water filtration, increased flooding.
How does climate change affect migration patterns in birds?
Changes in temperature and food availability alter timing and routes.
How do forest fires impact the cycling of nutrients?
They can release nutrients quickly, but also may lead to soil erosion.
What are the long-term effects of increased ocean temperatures on marine food webs?
Affect plankton populations, which could alter the entire food web.
What happens when urban expansion encroaches on a natural area?
Reduction in habitat size, potential loss of species.
What happens to an ecosystem if its main water source becomes contaminated?
Reduced species health and biodiversity, changes in food web dynamics.