The Living World: Biodiversity
Which example below represents a cultural ecosystem service offered by natural environments?
Recreational opportunities in a forest
Pest control by predatory insects
Fertilization of crops by nitrogen-fixing plants
Generation of oxygen by algae photosynthesis
Which of the following is an example of a regulating ecosystem service?
Pollination by bees
Decomposition of waste by bacteria
Formation of soil from weathered rock
Production of oxygen by plants
Considering an ocean reef ecosystem, what best describes the impact of algae serving as foundation species in the community?
Algae compete with coral for cover, limiting the space available for coral growth and development.
Algae act as predatory organisms, feeding on plankton and small fish, disrupting the lower tiers of the food web.
Algae provide essential food and shelter for various marine creatures, ultimately sustaining a diverse set of life.
Algae contribute directly to increased salinity levels, altering the chemical composition of seawater.
Considering an arid region where water scarcity threatens agricultural productivity, what method promotes ecosystem service retention alongside enhancing food security?
Instituting policies that promote drip irrigation technology adoption coupled with drought-resistant crop varieties research funding.
Imposing heavy tariffs on imported agricultural goods to protect domestic farmers, encouraging greater water consumption.
Removing regulations on water withdrawals from rivers and aquifers, giving farmers unrestricted access to water resources.
Encouraging widespread use of flood irrigation systems to expand farmland use at the expense of groundwater reserves and downstream water availability.
Which of the following best describes an ecosystem service provided by forests?
Production of pharmaceuticals
Water purification using chemicals
Generation of solar energy
Carbon sequestration
How might the removal of mangrove forests for shrimp farming most significantly affect coastal ecosystems' ability to provide ecosystem services?
Temporary boosts in shrimp populations benefiting certain predator species.
Enhanced nutrient cycling due to concentrated aquaculture waste products.
Reduced storm protection and increased erosion affecting local infrastructure and habitats.
Short-term increases in local employment opportunities through aquaculture development.
If a pharmaceutical company develops a drug derived from a plant found in a tropical rainforest, which of the following is the most likely negative consequence for that ecosystem if unsustainable harvesting practices are employed?
Enhanced carbon sequestration due to increased forest density
Improved nutrient cycling from increased leaf litter decomposition
Increased biodiversity from selective breeding programs
Loss of biodiversity due to habitat destruction

How are we doing?
Give us your feedback and let us know how we can improve
Bees are most recognized for their role in ecosystems as what type of service?
Predators
Pollinators
Decomposers
Soil aerators
What outcome would least likely occur if agroforestry practices were implemented widely across monoculture-dominated agricultural landscapes?
Potential migration of traditional farmers toward more technologically intensive agriculture methods to exploit new niches created by agroforestry.
Drastic reductions in water usage due to increased shade and moisture retention afforded by tree cover.
Diminished reliance on synthetic fertilizers detrimental to nearby aquatic systems.
Increased genetic diversity among cultivated crops due to the presence of various tree species serving as windbreaks and habitat for wildlife.
Which service provided by wetland ecosystems illustrates their importance in supporting both local biodiversity and human communities?
Wetlands filter pollutants from water, improving quality for wildlife habitat and human use.
Wetlands provide extensive fertile agricultural land due to regular flooding events.
Wetlands generate significant oxygen production surpassing that of large terrestrial forests.
Wetlands are pivotal locations for commercial fishing activities, providing most global fish catch.