Animals Short Answer
| # | Answer |
|---|---|
| 1 | A habitat is the physical place where an animal lives, while a niche is the role it plays in the ecosystem, including how it gets food, uses resources, and interacts with other organisms. |
| 2 | Animals can influence soil formation by burrowing, mixing organic matter into the ground, and increasing aeration and water movement in the soil. |
| 3 | Decomposers break down dead animal matter and wastes, releasing nutrients back into the soil and water for plants and other organisms to use. |
| 4 | Grazing animals can reduce the abundance of some plant species, create space for others to grow, and influence which plants dominate an area over time. |
| 5 | Keystone species have a disproportionately large effect on their ecosystems compared with their abundance, so their presence or absence can strongly alter community structure and ecosystem processes. |
| 6 | Animals can carry seeds on their fur, feathers, or feet, or transport them internally after eating fruit, helping plants spread into new areas and across different landforms. |
| 7 | Marine animals can disturb, mix, or redistribute sediment through burrowing, feeding, and movement, which changes seafloor structure and water clarity. |
| 8 | Biomineralization is the process of forming mineralized structures such as shells, skeletons, or teeth. Many animals, including corals, mollusks, and vertebrates, do this. |
| 9 | Reef-building corals produce calcium carbonate structures that accumulate over time, creating large reef landforms and influencing coastal erosion, sediment patterns, and habitat development. |
| 10 | Animals depend on suitable environmental conditions for survival, reproduction, and food availability, so shifts in temperature and precipitation can move their ranges or limit where they can live. |
| 11 | Animals transfer energy by consuming plants or other animals, and then passing that energy through food webs. Each feeding level loses some energy as heat and metabolism, affecting ecosystem energy flow. |
| 12 | Large herbivores can reduce fuel loads by eating grasses and shrubs, which may lower fire intensity or frequency. In some cases, their grazing patterns also help maintain open grassland conditions. |
| 13 | Changes in animal abundance, health, migration, or reproductive success can reflect pollution, habitat loss, climate shifts, or changes in water and soil quality, making them useful ecological indicators. |
| 14 | Human activities such as land conversion, overfishing, pollution, and climate change can reduce animal populations or change their behavior, which in turn affects soil mixing, nutrient cycling, seed dispersal, and habitat structure. |
| 15 | Beavers are a classic example of ecosystem engineers because they build dams that create wetlands, alter water flow, trap sediment, and change erosion and deposition patterns. These changes reshape the landscape and create new habitats for other species. |