3.1 Understanding Systems and Ecosystems

What is a system in general terms?

• A network of interdependent components and processes

• A single independent component

• A random collection of elements

• A static entity with no energy flow

What is the main goal of managing nutrients in the Gulf of Mexico?

• To restore a stable system

• To increase the population of a single species

• To eliminate all microorganisms

• To create an imbalance in the ecosystem

What do the plants use to create carbohydrates?

• Carbon, water, and sunlight

• Nitrogen, oxygen, and water

• Carbon dioxide, nitrogen, and sunlight

• Oxygen, water, and sunlight

What role does a rabbit play in the described system?

• Herbivore

• Carnivore

• Decomposer

• Producer

What is the role of decomposers in the system?

• Recycle wastes from all previous compartments

• Consume plants

• Create carbohydrates

• Store energy and matter

What can help us diagnose disturbances or changes in ecological systems?

• Understanding the characteristics of ecological systems

• Ignoring the characteristics of ecological systems

• Increasing herbivory

• Reducing oxygen levels in water

What can happen if rabbits become too numerous in an ecological system?

• Herbivory can become too rapid for plants to sustain

• Photosynthesis will increase

• Decomposition will slow down

• Predation will decrease

What has led to excess algal growth in the Gulf of Mexico?

• Excess nitrogen and phosphorus

• Reduced herbivory

• Increased predation

• Decreased decomposition

What is the result of reduced oxygen levels in water due to excess algal growth?

• It kills fish and other aquatic organisms

• It increases photosynthesis

• It reduces herbivory

• It increases decomposition

What type of system is the Gulf of Mexico described as?

• An open system

• A closed system

• A static system

• A dynamic system