Identify Human Impacts on Ecosystems - Biology

Reduces aquatic plants and disrupts food webs. Herbicides kill aquatic plants that form the base of food chains.

Habitat destruction and water contamination by tailings. Excavation destroys habitats and toxic waste pollutes surrounding areas.

Human-made noise interfering with communication and mating. Loud sounds mask important acoustic signals between animals.

Lawn fertilizer runoff. Nonpoint sources come from diffuse, widespread areas.

Burning gasoline. Gasoline combustion releases carbon stored in fossil fuels.

Lower pH that stresses or kills aquatic organisms. Acidic conditions harm fish gills and disrupt reproduction.

Human ignition sources and land management that increases fuels. Human activities create ignition sources and increase flammable materials.

Overgrazing and unsustainable farming in dry regions. Poor land management degrades soil and removes protective vegetation.

More dissolved $ ext{CO}_2$ forming carbonic acid in seawater. Atmospheric $\text{CO}_2$ dissolves and lowers ocean pH levels.

Reduced calcification, weakening coral skeletons. Lower pH makes it harder for corals to build calcium carbonate structures.

Human-made noise interfering with communication and mating. Loud sounds mask important acoustic signals between animals.

Artificial night light disrupting behavior and circadian rhythms. Artificial lighting confuses nocturnal animals and migration patterns.

Lower dissolved oxygen because warm water holds less $ ext{O}_2$. Warmer water cannot dissolve as much oxygen as cool water.

Warmer water released from power plant cooling systems. Power plants discharge heated water that raises aquatic temperatures.

Habitat destruction and water contamination by tailings. Excavation destroys habitats and toxic waste pollutes surrounding areas.

Overgrazing and unsustainable farming in dry regions. Poor land management degrades soil and removes protective vegetation.

Vegetation loss, soil compaction, and increased erosion. Too many animals damage vegetation and compact soil.

Severe habitat loss and increased soil erosion. Removes all vegetation and topsoil, devastating local ecosystems.

Dissolved oxygen decreases due to decomposition. Bacteria consume oxygen while breaking down dead algae.

Splitting habitats into smaller patches, reducing connectivity and biodiversity. Roads create isolated patches that limit animal movement and gene flow.

Excess fertilizer or sewage adding nitrogen and phosphorus. These nutrients fuel excessive algae growth in water bodies.

Toxins build up in organisms; often mercury or persistent pesticides. These substances resist breakdown and accumulate in fatty tissues.

Toxin concentration increases at higher trophic levels. Predators consume many contaminated prey, concentrating toxins.

Clearing forests for agriculture, logging, or urban development. These activities remove tree cover for human land use needs.

Reduced native biodiversity and altered nutrient cycling. Monoculture replaces diverse plant species and disrupts natural cycles.

Burning fossil fuels releasing $ ext{SO}_2$ and $ ext{NO}_x$. These gases react with water vapor to form acids in the atmosphere.

Favors fast-growing species, reducing diversity. Excess nitrogen allows weedy species to outcompete native plants.

Fertilizer use and burning fuels that emit $ ext{NO}_x$. Agriculture and vehicle emissions are major nitrogen sources.

Reduces aquatic plants and disrupts food webs. Herbicides kill aquatic plants that form the base of food chains.