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Food Chains and Food Webs

A food chain is a indicator of the producers and consumers of different habitats. Ask questions about the food chains of different ecosystems here.

4,128 Questions

How do you fish in the Mediterranean?

You can make it as simple or as complicated as you wish:-) I'm in the UK, so am able to fish around the Med several times each year, as a part of vacation trips, and the methods vary very little from country to country. If you are in an urban centre / city, it is possible / probable that you will be able to take part in organised fishing trips on board a boat, which can be anything from dangling a line overboard to big-game fishing. Most fishing probably takes place from shores / breakwaters, in harbours etc ... and remember, tides are not really an issue in the Med, as for all intents and purposes, they do not exist!:-) Fishing methods can range from the lightest rod that you own, with a naural bait (virtually anythiung edible!), to a powerful rod capable of casting 5 ounces (160grams) well over 150 yards / metres .. or anything in between, including the full range of lure / baitcasting rods. It REALLY is that flexible .. take what you have and simply enjoy yourself .. like the world over, you'll find that anglers talk to each other:-)

What is a squirrel in the food chain?

In the food chain, a squirrel is typically considered a primary consumer, as it primarily feeds on nuts, seeds, fruits, and sometimes insects. By consuming these plants, squirrels play a crucial role in seed dispersal, aiding in plant reproduction and ecosystem health. Additionally, they serve as prey for various predators, including birds of prey, snakes, and carnivorous mammals, thus contributing to the ecological balance.

What are examples of how the food chain can be broken between producer and consumer or predator and prey?

One way a food chain can become "broken" is when humans disrupt the food chain.

For example, in Yellowstone Park and nearby States, humans had killed off wolves in the area. Scientists noted how big game populations of deer and elk started increasing. After many decades, scientists noted that the increased big game ate most of the foliage, which changed the forests and soil. Trees started to die. Without trees and foliage, Yellowstone had more erosion especially near rivers. Rivers reacted to the higher soil quantities of runoff deposited into the water. Waters became more stagnant and flowed less vigorously.


Eventually, scientists decided to reintroduce wolves into the ecosystem. Wolves mated, had babies, thus increasing their population. Scientists added more wolves to prevent cycles of in-breeding genes. The wolves began to kill big game, lessening the ill and elderly populations of elk and deer. Foliage began to grow again. Wolves added nutrients to the soil from the wolves' wastes. New sapling trees started to grow again. But most interesting...the re-introduction of wolves changed the river! With more trees and foliage, there was less erosion. With less erosion, the rivers became less stagnant. The rivers began to flow faster and because the water erodes rocks, the river narrowed back into its original bed (rather than expanding when it was stagnant).




Really cool information to know!

What effect would a drop in the size of the of the krill population have on the Antarctic food web and why?

Euphasia superba, Antarctic krill, are the base of the food chain in the Southern Ocean that surrounds Antarctica.

Any decline in their population would mean that the remainder of the food chain would be forced into warmer water to find food.

What does arrows in a food chain represents?

It represents the flow of energy from one organism (food) to another (the consumer or predator). The one that is gaining the energy has the arrow pointing to it. For example: A mouse would be pointing to a snake, and the snake would be pointing to a hawk.

What resources do organisms compete for in caves?

The same resources as they do everywhere else: food, water and shelter. In a cave, there is no light, so there are no plants to eat. Animals and fungi who live in caves have to survive by eating other animals or their waste products.

Why are decomposers so important in food chains and food webs?

When organic matter decomposes, it becomes fertilizer, releasing nutrients that plants need in order to grow. It is basically a recycling process. If this was not happening, soil fertility would become exhausted as plants continue to take minerals out of the soil.

What would is Happen to the food web if forest fire occurred?

If a forest fire occurs, it can significantly disrupt the food web by destroying habitats and killing organisms at various trophic levels. Primary producers, such as plants, may be severely damaged or wiped out, leading to a decrease in food availability for herbivores. This, in turn, affects carnivores that rely on those herbivores for food. However, over time, the ecosystem can recover, with new growth and species adaptations reshaping the food web.

How energy flows from the sun as it is transferred along the food chain through the producersto the consumers?

As you might expect, the Sun's energy is depleted as it moves through a food chain in any environment. The organisms that capture energy directly from the Sun always have the most energy content, or in a predator prey scenario, the most nutrients. On land plants are eaten by herbivores allowing them to get the most rich and concentrated energy and nutrition. This is why herbivores tend to be the LARGEST organisms, not only on land but in the ocean as well. They get tons of energy without have to do a lot of work. Now as you move down the food chain this energy becomes more and more diluted. Animals that are predators (carnivores in particular) have had to adapt to either be smaller, eat more frequently, reduce their metabolisms, etc. In fact, the Sun's energy is so quickly depleted as it moves through the food chain that in any ecosystem there are few examples of more than about 5 steps in the food chain. Here's some examples: plankton use sunlight, small organisms eat plankton, small fish like sardines eat them, large fish like tuna eat them, and sharks eat the tuna. Yes you could argue human then eat sharks but we eat at will and thus the need for energy isn't a factor.

Prove that all energy comes from the sun in a food chain?

To do this simply you need to trace back the food source of an animal. For example:

lion eats deer, deer eats grass, grass uses sun's energy to produce food via photosynthesis.

What food company does the prisons use?

In a prison food is cooked and made in the prison. Many even grow some things. A company wouldn't be needed.