Scientists have been studying four populations in one area of the Atlantic Ocean. In this area, both tuna and dolphins eat squid, and squid eat herring (a type of fish).



The data shows that recently the tuna population increased. How will the increase in the tuna population affect the other populations? Be sure to explain whether the dolphin population, the squid population, and the herring population will change, and why.

Answer:

the squid population could decrease, because the tuna population is increasing and they would eat more squid, so the dolphin population would also decrease because there would be less squid to eat, and because there are less squid the herring population would increase.

In trophic webs, there is an equilibrium between species until a change occurs. The increase in tuna's population causes a decrease in dolphins' and squids' populations, and an increase in herring's one.

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To answer this question, let us first review some theoretical framework.

The trophic web is a relationship process between different organisms, through which occurs transference of energy.

The ones placed at lower levels pass energy to the ones at the higher levels.

Organisms at each level feed on the preceding one and become food for the next one.  

As it is a web, all organisms are equilibrated until a change occurs.

When the change affects any of the involved links, there can be a cascade effect on the web.

A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.

Also, when two or more species are competing for the same source of food, a change in any of the population sizes will affect the other ones.

Now, let us analyze the exposed example.

We know that,

We need to figure out what is the cascade effect caused by the increase in the tuna population.

We know that tuna and dolphins compete for food items -squids-.

An increase in the number of tuna individuals means a higher competition pressure for dolphins.

The more tuna there are, the more squids they eat, and the less food available there is for dolphins.

Since there are not enough squids for dolphins, their population decreases in size.

Dolphins are negatively affected by tuna's increase.

**** Tuna population increases  ⇒  Dolphins population decreases ****

Tuna applies a significant predation pressure on squids, which are their main source of food.

The more tuna there are, the more squids they eat.

Squids probably can not reach sexual maturity or do not get to successfully reproduce, because they are eaten by tuna.

So squids population is negatively affected by the tuna population increase.

**** Tuna population increases  ⇒  Tuna population decreases. ****

Since squids feed on herring, any change in squids' population size affects herrings directly.

When the squids' population decreases in size, the herring population increases. More fishes get to survive and successfully reproduce.

The predation pressure of squids on herring decreases.

The herring population is positively affected by the squids' population decrease.

*** Squids population decreases  ⇒  Herring population increases. ***

Summing up, the cascade effect is as follows,

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You can learn more about trophic webs at the following link: https://brainly.com/question/516534?referrer=searchResults

how are elements in the same group in the periodic table alike

Connect as many terms that you can think of. Each term should be related to
the term at the center,
LIGHT​

Materials with small, connected pores are _____.
A. Impermeable
B. Permeable
C. Unsaturated
D. Saturated
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When vinegar, an acid, is mixed with baking soda, a base, the reaction is similar to the reaction of Alka-Seltzer and water; a salt, water and carbon dioxide are produced. In two or more complete sentences, describe how your knowledge of balancing chemical equations can help you to determine the missing compound.


NaHCO3 + HC2H3O2 ⟶ ________ + H2O + CO2

How do unicellular and multicellular organisms differ in structure and function?

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Sample Density (g/cm3)
W 5.1
X 1.7
Y 7.3
Z 3.5

Which sample has the greatest mass?

which of the following can cause an algal bloom ?

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The motion of ball B will increase.
The motion of ball B will decrease.
The motion of ball B will stay the same.
The motion of ball B will become the same as ball A.

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of charge on of the molecule is called
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Acrylic

Cotton

Nylon

Polyester

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The object produces less friction.
The object gradually stops moving.
The motion of the object reduces.
The motion of the object becomes greater.

It is important that engineers build a structure that is safe. What do they look for when testing their designs?

Failure points
Fair tests
Prototypes
Variables

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Help! Please :) Thank you

How are the scientific method and the engineering method similar?

Both methods identify failure points.
Both methods construct a hypothesis.
Both methods focus on designing things.
Both methods work on finding solutions to problems.

Can you help answer BOTH questions pleaseee!!!

4 QUESTIONS PLEASEEE HELP WILL GIVE BRAINLIEST!!!!
1. How are features like trenches, plains, ridges and valleys formed on the ocean floor?
2. Where does 90% of the marine life live in oceans?
3. a. Where are nutrients abundance? b. Where do these nutrients come from?
4. How do organisms deep I the ocean get their nutrients?

Can someone please help me with this it's for a grade.

strong acids and bases can be harmful to both plants and animals in our waterways. which of the following is not a consequence of acidity ?

Water is less dense as ice than liquid

Your answer:

true


false

please help me answser this, its a photo

o element
o subscribe
o coefficient

One atom of (blank) bonded to two atoms of (blank).

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The motion of ball B will increase.
The motion of ball B will decrease.
The motion of ball B will stay the same.
The motion of ball B will become the same as ball A.

At room temperature, aluminum is a solid and water is a liquid. How do the particles of the solid aluminum compare to the particles of the liquid water?
A. The particles in the liquid water and the solid aluminum are the same. They both vibrate and move slowly.
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C. The particles in the liquid water vibrate and are tightly packed and particles in the solid aluminum slide past each other.
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I WILL GIVE BRAINLIEST BUT THE QUESTIONS MUST ALL BE ANSWERED

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HINT: If (fill in manipulated variable), then (fill in responding variable)

1. If plants are watered, then growth height will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

2. If chocolate is given to teachers, then amount of homework will decrease.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

3. If trees have leaves, then bird nests will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

4. If acid rain is in water, then fish population will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: ________________________________________________________________________

5. If calcium is given, then bone strength will increase.
Manipulated variable: ________________________________________________________________________
Responding variable: _______________________________________

What happens when weathering and erosion work together? A.Weathering B.Raining C.Erosion D.breaking
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