How many of you would it take to light a 60 W light bulb

Describe two ways geologists can determine if two layers of rock in different locations formed at the same time.

kykrilka [37]

Radioisotopic dating and relative dating.

3 0

3 years ago

Monterey Bay, on the California coast, contains a diverse and complex ecological community. A variety of seaweeds and single-cel

Furkat [3]

The trophic web is the transference of energy through different trophic levels. TL1) algae, seaweed /TL2) urchins, abalone, snails, crabs / TL3) sea-stars, otter, fish /TL4) octopus, sea lions /TL5) orca / Detritivore) cucumbers.

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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.

• The first link corresponds to a producer organism -autotroph-.

• The following links are the consumers -heterotrophs-: herbivores and carnivores.

• The last links are the decomposers that degrade organic matter from dead organisms.

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.

Trophic pyramid:

The trophic web can be represented as a pyramid.

The base of the pyramid is always composed of producers, followed by primary consumers, secondary, tertiary, and so on.

Outside the pyramid and closing the cycle, we can find decomposers and detritivorous.

Now, to complete the trophic pyramid, let us analyse information provided by the statement.

We will see who feeds on who.

seaweeds and single-celled algae ⇒ photosynthetic organisms

sea urchins, abalone, snails, and crabs ⇒ feed on photosynthetic organisms

Sea stars ⇒ prey on urchins, abalone, snails

Octopus ⇒ eat crabs, fish, and sea stars

Otters and small fish ⇒ eat urchins, abalone, snails, and crabs

Sea lions and harbor seals ⇒ feed on fishes

Orcas and sharks ⇒ feed on otters, fishes, dolphins, sea lions, seals

Sea cucumbers ⇒ eat dead organic matter

The options to complete the pyramid are snail, abalone, orca, otter, single-celled algae, urchin, small fishes, seaweed, crabs, sea lion, cucumber, octopus, and sea-star.

According to the analysis we did before about who feeds on who, we will complete the pyramid.