Sometimes cattle are allowed to graze in these areas. The hooves of the cattle compact the topsoil making it less absorbent. Which environment concern is most likely to happen at the edge of the desert when cattle graze there? Due to recent rains, the fertilizer used on nearby crops has washed into a lake.
What would most likely result from the overfishing of a lake?
Overfishing can occur in water bodies of any sizes, such as ponds, rivers, lakes or oceans, and can result in resource depletion, reduced biological growth rates and low biomass levels. Sustained overfishing can lead to critical depensation, where the fish population is no longer able to sustain itself.
Which of these is a threat to the survival of an ecosystem?
Habitat loss, climate change, and a lack of biodiversity can all make ecosystems unhealthy, putting wildlife at greater risk for disease. … Habitat loss—due to destruction, fragmentation, or degradation of habitat—is the primary threat to the survival of wildlife in the United States.
What would a farmer most likely do to replenish nitrogen that was depleted from the soil?
Nitrogen is a nutrient needed by plants for growth. … What would a farmer MOST likely do to replenish nitrogen that was depleted from the soil? add fertilizer to the soil to provide a source of nitrogen. Which of the following is the greatest source of wild fish for human populations?
Which of these will most likely occur if chemicals from fertilizers run off into lakes and streams?
Which of these will most likely occur if chemicals from fertilizers run off into lakes and streams? Fish will die from a lack of oxygen.
How is overfishing affecting the environment?
It can change the size of fish remaining, as well as how they reproduce and the speed at which they mature. When too many fish are taken out of the ocean it creates an imbalance that can erode the food web and lead to a loss of other important marine life, including vulnerable species like sea turtles and corals.
How overfishing affects the ocean environment?
A major concern right now is the problem of overfishing. Ocean overfishing simply means catching fish from the sea at rates too high where fish stocks become too depleted to recover. … Catching too many fish seems like a profitable practice, but it endangers ecosystems and affects the balance of life in oceans.
What are major environmental threats?
Twenty-first century threats to our environment—including invasive species, diseases, pollution, and a warming climate—are putting wildlife populations at risk. The National Wildlife Federation unites Americans addressing these environmental threats and protecting our wildlife and their habitats.
What are the threats to survival?
They list the threats as extinction and eco-collapse, resource scarcity, nuclear arms race, climate change, global poisoning, food system failure, pandemic diseases, uncontrolled technologies, overpopulation/megacity collapse, and denial and delusion.
What is the most important way an artificial reef may support the development of a complex ecosystem?
What is the most important way an artificial reef, such as a sunken ship or railroad car, may support the development of a complex ecosystem? By providing habitat for algae and small invertebrates.
What is the basic concept of sustainable agriculture?
“Sustainable agriculture” as legally defined in U.S. Code Title 7, Section 3103 means an integrated system of plant and animal production practices having a site-specific application that will over the long term: Satisfy human food and fiber needs.
What does no till farming?
No-till farming (also known as zero tillage or direct drilling) is an agricultural technique for growing crops or pasture without disturbing the soil through tillage. … These methods may increase the amount and variety of life in and on the soil.
How does fertilizer runoff affect the environment?
Too much fertilizer can actually kill the plant and excess fertilizer can runoff into streams and lakes causing toxic algal blooms that are harmful to aquatic life and even people and their pets. Excess fertilizer runoff from lawns and agricultural applications also contribute to aquatic “dead zones” in coastal areas.
How does fertilizer affect the environment?
Fertilizers provide crops with nutrients like potassium, phosphorus, and nitrogen, which allow crops to grow bigger, faster, and to produce more food. … However, applying excessive amounts of fertilizer leads to the release of harmful greenhouse gases into the atmosphere and the eutrophication of our waterways.
How do fertilizers cause water pollution?
Fertilization of surface waters (eutrophication) results in, for example, explosive growth of algae which causes disruptive changes to the biological equilibrium [including fish kills]. This is true both for inland waters (ditches, river, lakes) and coastal waters. Groundwater is being polluted mainly by nitrates.