7.1.1 Communities

• What is a community in ecological terms?

  Group of interacting species
• Organisms in a community are interdependent because they rely on each other for resources, food, and shelter.


  True
• The Amazon Rainforest is an example of a forest community
• What is a key characteristic of aquatic communities?

  Dependence on water
• Order the abiotic factors that influence community composition:

  1️⃣ Temperature

  2️⃣ Rainfall

  3️⃣ Soil pH

  4️⃣ Nutrient availability
• Biotic factors influence the abundance and distribution of species
• How are communities classified into types?

  Based on key characteristics
• Match the type of community with its key characteristic:

  Forest ↔️ Diverse vegetation

  Grassland ↔️ Dominance of grasses

  Aquatic ↔️ Dependence on water
• Abiotic factors include physical and chemical conditions like temperature, rainfall, and soil pH
• Biotic factors in a community include competition, predation, and symbiosis.


  True
• Deserts support drought-tolerant plants due to low rainfall
• The composition of a community is influenced by abiotic and biotic factors.
• Biotic relationships shape species distribution and abundance.

  True
• What are example species found in a forest community?

  Trees, squirrels, deer
• Forest communities support a complex food web due to their diverse vegetation.


  True
• What type of symbiotic relationship benefits both species involved?

  Mutualism
• Match the interaction type with its description:

  Symbiosis ↔️ Close relationship between species

  Predation ↔️ One species eats another

  Competition ↔️ Struggle for resources
• Why is biodiversity crucial for maintaining ecosystem health?

  Supports key ecosystem functions
• Order the stages of primary succession:

  1️⃣ Pioneer species colonize bare rock

  2️⃣ Soil begins to form

  3️⃣ Grasses and shrubs establish

  4️⃣ Climax community develops
• Primary succession starts on bare rock or new land.
• A community is a group of different species that live together and interact in a specific habitat
• Match the type of interaction with its description:

  Competition ↔️ Organisms compete for resources

  Predation ↔️ One organism eats another

  Mutualism ↔️ Both species benefit
• Grassland communities have diverse vegetation and complex food webs.

  False
• In a forest community, fungi aid in nutrient recycling
• What determines which species can survive in a particular habitat?

  Abiotic factors
• Abiotic and biotic factors together shape the overall structure and diversity of a community.


  True
• Forest communities have diverse vegetation and a complex food web
• What are three common types of communities mentioned in the material?

  Forest, grassland, aquatic
• What are abiotic factors in an ecosystem?

  Physical and chemical conditions
• What is a biotic factor in an ecosystem?

  Interactions among organisms
• Name an example of an abiotic factor.

  Soil pH
• Match the type of community with its key characteristic:

  Forest Community ↔️ Diverse vegetation, complex food web

  Grassland Community ↔️ Dominance of grasses, sparse tree cover

  Aquatic Community ↔️ Dependent on water availability
• Which type of community is characterized by its dependence on water availability?

  Aquatic Community
• Interactions within a community fall into three primary categories: symbiosis, predation, and competition.
• Competition occurs when different species vie for the same resources.


  True
• Biodiversity refers to the variety and abundance of different living species within a community.
• Greater biodiversity makes a community more resilient to disturbances.


  True
• What type of succession occurs after a disturbance like a wildfire?

  Secondary Succession
• Secondary succession takes decades to centuries to reach a climax community.

  True