Sev2c and D Review

invasive cause harm in a new ecosystem endemic only naturally found in one place endangered in danger of becoming extinct indicator reflects the health of the environment - shows us if something has changed keystone necessary to the ecosystem - if it is removed the ecosystem will change dramatically native naturally found in an area How does biodiversity contribute to ecosystem sustainability? It decreases the resilience of ecosystems to environmental changes. It increases the stability and productivity of ecosystems by providing a variety of species with different roles. It has no effect on the overall health or functioning of ecosystems. It reduces the variety of available habitats within an ecosystem. What is the role of a keystone species in an ecosystem? It is the most abundant species, contributing to a large portion of the ecosystem's biomass. It exclusively interacts with other species of the same trophic level. It has a extremely large impact on the structure and functioning of its ecosystem It is the top predator in the food chain and controls the population of other species. How do invasive species typically affect ecosystems? They usually enhance biodiversity and improve ecosystem stability. They have no impact on the native species or ecosystem functions. They help maintain the balance of native species populations. They can outcompete native species for resources, potentially leading to a loss of biodiversity. Watch the video and use it to answer the following questions. Primary succession starts in places where there is no soil or life, like after a volcano eruptsor a glacier melts. The first organisms to grow in these areas are pioneer species, like lichens and mosses, which can survive in tough conditions. These species help break down rock and start to form soil. Over time, other plants and animals move in, and the ecosystem becomes more stable, reaching what is called a climax community. Secondary succession happens in areas where a disaster, like a fire or human activity, has damaged an ecosystem but left the soil behind. Pioneer species like grasses and small plants quickly grow, and over time, shrubs and trees return. Secondary succession happens faster than primary succession because the soil is already there. Both types lead to a stable climax community, but primary succession takes longer since soil needs to be created first. What is the first step in primary succession? Grasses and shrubs begin to grow. Pioneer species like lichens and mosses start to colonize the area. Trees begin to form a forest. The ecosystem reaches a climax community. Which would NOT lead to secondary succession? a forest fire paving a parking lot a tornado a hurricane