How has man's intervention affected the survival of Krill and the food chain?

1. What would happen if the krill were removed from the food chain?
2. How does human activities affect marine life?
3. Why are krill dying?
4. What factors affect krill population?
5. How can krill survive through the harsh winter?
6. What would happen if krill didn't exist?
7. How human activities affect our coastline?
8. How are humans affected by ocean pollution?
9. Can krill survive in warm water?
10. Do people eat krill?
11. What is the environmental impact of using krill for animal feed?
12. What factors are impacting on the krill populations in Antarctica?
13. How can we manage fisheries to prevent the competition with penguins?

What would happen if the krill were removed from the food chain?

If the krill were to disappear, all of the creatures which feed upon them would also disappear. In general, most animals bigger than krill will eat it, from whales, seals, penguins, other seabirds and fish.

How does human activities affect marine life?

Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. ... It has been estimated only 13% of the ocean area remains as wilderness, mostly in open ocean areas rather than along the coast.

Why are krill dying?

Krill populations have declined by 80 percent since the 1970s. Global warming has been blamed for part of that decrease because the ice that is home to the algae and plankton they feed on is receding. Campaigners say recent developments in fishing technology are worsening the problem.

What factors affect krill population?

We wanted to project how climate change will affect the Southern Ocean's krill “growth habitat” – essentially, ocean areas where krill can thrive in high numbers. Krill growth depends largely on ocean temperature and the abundance of its main food source, phytoplankton (microscopic single-celled plants).

How can krill survive through the harsh winter?

Krill have the ability to shrink their bodies and undergo long periods of starvation. These adaptations allow them to survive the winter months in the Antarctic. Krill travel in swarms so dense they can actually be seen from space.

What would happen if krill didn't exist?

If krill disappeared from the Antarctic ecosystem, it would have a dramatic, negative impact on nearly all Antarctic species, especially on large Antarctic animals such as whales, seals and penguins.

How human activities affect our coastline?

Human activities in coastal areas have affected many of the natural environmental processes there. This has led to a wide range of issues including a loss of biodiversity, high levels of pollution, erosion, and rising sea levels due to climate change.

How are humans affected by ocean pollution?

Every day, toxic chemicals are entering our oceans. ... If humans are exposed to these toxic chemicals for long periods of time, then this can result in dangerous health problems, which include hormonal issues, reproductive issues, and damage to our nervous systems and kidneys.

Can krill survive in warm water?

While warmer ocean temperatures help the krill hatch faster, declines in sea ice area, delayed sea ice formation, and a drop in phytoplankton populations meant that overall, the habitat suitable for young krill could decline by up to 80 percent, they found.

Do people eat krill?

Most of the krill catch is used for aquaculture and aquarium feeds, as bait in sport fishing, or in the pharmaceutical industry. In Japan, the Philippines, and Russia, krill are also used for human consumption and are known as okiami (オキアミ) in Japan. They are eaten as camarones in Spain and Philippines.

What is the environmental impact of using krill for animal feed?

It threatens not just krill, but the entire ecosystem that depends on them, say environmental campaigners. Krill are also believed to be important in removing the greenhouse gas carbon dioxide by eating carbon-rich food near the surface and excreting it when they sink to lower, colder water to escape predators.

What factors are impacting on the krill populations in Antarctica?

Researchers and environmental campaigners warn that a combination of climate change and industrial-scale fishing is threatening the krill population in Antarctic waters, with a potentially disastrous impact on larger predators.

How can we manage fisheries to prevent the competition with penguins?

How can we manage fisheries to prevent the competition with penguins? Prevent over catching, monitor krill populations, and set catching limits and limit catching areas. During breeding season, Adelie penguins cannot swim too far from their nesting site. Restricting those areas would be helpful.