Life Sciences - Term 4 - Week 2

An ecosystem is a community of living organisms interacting with their physical environment. It includes both biotic factors, such as plants and animals, and abiotic factors, such as water, soil, and climate. Ecosystems can vary in size and complexity, ranging from a small pond to a vast forest. The interactions among organisms and their environment create a dynamic system that supports life.

Biodiversity refers to the variety of life in a particular habitat or ecosystem. It includes the diversity of species, genetic diversity within species, and the variety of ecosystems themselves. Biodiversity is crucial for ecosystem resilience, providing stability and the ability to recover from disturbances. High biodiversity can enhance productivity and contribute to the overall health of the environment.

In an ecosystem, organisms can be classified into three main roles: producers, consumers, and decomposers. Producers, such as plants, convert sunlight into energy through photosynthesis. Consumers, including herbivores and carnivores, obtain energy by eating other organisms. Decomposers, like fungi and bacteria, break down dead organic matter, returning nutrients to the soil. Understanding these roles helps us appreciate the balance within ecosystems.

In groups, students will be given a list of various organisms (e.g., grass, rabbit, fox, mushroom). They will categorize each organism as a producer, consumer, or decomposer. After categorizing, groups will discuss how these organisms interact within their ecosystem and the potential consequences if one group were to be removed.

Students will choose an ecosystem (e.g., rainforest, desert, coral reef) and research its biodiversity. They will create a presentation that includes the types of organisms found in that ecosystem, their roles, and the importance of preserving that ecosystem. Students will present their findings to the class, fostering discussion on conservation efforts.

• A community of living organisms and their environment
• A type of plant
• A method of farming
• A climate zone

Answer: A community of living organisms and their environment

An ecosystem encompasses both living organisms and their physical surroundings, highlighting the interactions between them.

• Rabbit
• Fox
• Grass
• Mushroom

Answer: Grass

Producers, like grass, create their own energy through photosynthesis, unlike consumers that rely on other organisms.

Answer: Biodiversity is the variety of life in a particular habitat or ecosystem.

Biodiversity includes the diversity of species, genetic diversity, and the variety of ecosystems.

• They produce energy
• They consume plants
• They break down dead matter
• They compete with consumers

Answer: They break down dead matter

Decomposers recycle nutrients back into the ecosystem by breaking down dead organic material.

Answer: Biodiversity is important because it enhances ecosystem stability and resilience.

High biodiversity allows ecosystems to better withstand environmental changes and recover from disturbances.

• Herbivore
• Carnivore
• Omnivore
• Fungi

Answer: Fungi

Fungi are decomposers, not consumers, as they break down dead organic matter rather than consuming living organisms.

• The ecosystem will thrive
• The ecosystem may collapse