Question

human - caused disturbances
people live in the environment, and many of our actions affect ecosystems. human - caused disturbances include human settlements, agriculture, air and water pollution, clear - cutting forests, and mining. like natural disturbances, human - caused disturbances can affect both small and large areas. they destroy habitats, wipe out populations of organisms, and contribute to a loss of biodiversity. however, some disturbances are unique to humans because the changes are more or less permanent. for example, roads and highways can permanently fragment an ecosystem, changing the way populations of species interact with their habitat and altering the way abiotic factors cycle through ecosystems.
analyzing the effects of urbanization
as the human population grows, the amount of land used for human development increases. one phenomenon currently being studied by ecologists is urbanization. urbanization refers to the process by which human developments, such as cities and towns, are established and develop as more people begin living in central areas. in general, as urbanization increases, biodiversity in that area decreases.
habitat fragmentation refers to a situation where a large continuous habitat is broken up into many smaller habitats. as cities expand, habitat fragmentation worsens, and biodiversity decreases.
scale, proportion, and quantity
explain make a claim about the affect urbanization has on biodiversity. does urbanization always decrease biodiversity? use evidence to support your claim and explain your reasoning. address the following questions in your answer:

• what are the main factors that lead to biodiversity loss in urban areas?
• how is the size of a habitat related to its biodiversity and its stability?
• can an ecosystem in an urban area ever return to its previous state?

analyze how does urbanization affect your life and the area in which you live?

Explanation:

1. Claim about urbanization and biodiversity: Urbanization generally decreases biodiversity as it leads to habitat loss and fragmentation. For example, as cities expand, natural habitats are converted into buildings, roads, etc. Evidence includes studies showing a decline in species - richness in urban areas compared to natural areas. However, urbanization doesn't always completely eliminate biodiversity. Green spaces like urban parks can support some species.
2. Main factors for biodiversity loss in urban areas: Habitat destruction (removing natural habitats for construction), pollution (air, water, soil pollution harming organisms), and introduction of non - native species (which can out - compete native species).
3. Habitat size and biodiversity/stability: Larger habitats can support more species as they offer more resources and niches. They are also more stable as they can better withstand disturbances. Smaller habitats are more vulnerable and have lower biodiversity due to limited resources and increased edge - effects.
4. Ecosystem recovery in urban areas: It is possible for an urban ecosystem to return to its previous state to some extent. Restoration efforts like re - planting native species, creating green corridors, and cleaning up polluted areas can help. But complete restoration may be difficult due to long - term changes like soil compaction and the presence of non - native species.

Answer:

1. Urbanization generally decreases biodiversity but not always. Evidence: Decline in species - richness in urban areas; urban parks can support some species.
2. Main factors: Habitat destruction, pollution, introduction of non - native species.
3. Larger habitats have more biodiversity and are more stable; smaller habitats have less biodiversity and are more vulnerable.
4. It is possible to some extent through restoration efforts, but complete restoration may be difficult.