Why Are Mussels In Mukkaw Bay Able To Quickly Cover Rock Face In Paine’s Experiment?

Which statement do Letourneau and Dyer’s results support?

What statement do Letourneau and Dyer’s results support? Adding beetles reduced ant numbers and triggered a trophic cascade that decreased the mean leaf area left on plants.

What species was at the top of the food chain in Mukkaw Bay?

One of his study sites, located at Mukkaw Bay, contained a community consistently dominated by the same species of mussels, barnacles, and the starfish, Pisaster ochraceus, which preys upon the other species as a top predator (Figure 1).

What does he mean by his claim that some species are more equal than others?

What does he mean by his claim that some species are more equal than others? some species have a bigger effect on the community than others. What evidence does he have to support that cliam?

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How did the Green hypothesis differ from this bottom up view?

a. How did the green world hypothesis differ from this “ bottom-up ” view? -Essentially, the green world hypothesis differs from the bottom-up view because it states that populations of terrestrial herbivores are regulated by the predators that exist above their trophic level.

What conclusion did Paine arrive at after seven years?

What conclusion did Paine arrive at after seven years? 4 7:06 8:44 • Keystone species are species in a food web that have large direct and indirect effects on the abundance and number of species in an ecosystem. Keystone species are often apex predators and are instrumental in maintaining the structure of an ecosystem.

Are some animals more equal than others CER?

Some Animals are More Equal than Others: Keystone Species and Trophic Cascades. Some Animals Are More Equal than Others explores the work of ecologists Robert Paine and James Estes. Robert Paine’s experiments showed that removing starfish from tidal pools has a big impact on the population sizes of other species.

Which kind of ecosystem is most likely to have the largest amount of biodiversity?

Species richness is greatest in tropical ecosystems. Tropical rain forests on land and coral reefs in marine systems are among the most biologically diverse ecosystems on Earth and have become the focus of popular attention.

What is a bottom up food chain?

In contrast, a bottom – up system focuses on the lower trophic levels and the factors that drive interactions at the base of the food chain. This could be thought of as a resource driven (resources being food or habitat availability) system.

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What did Robert Paine do with the purple star fish?

Paine found great value in deliberately disrupting an environment in the interest of science, as he did on Makah Bay, when he threw the predator starfish into the waves, away from the shore. “Experimental manipulation is not only more interesting, it’s much more fun,” he told The Seattle Times in 2013.

Are all species equal in an ecosystem?

abstract Species egalitarianism is the view that all species have equal moral standing. To have moral standing is, at a minimum, to command respect, to be something more than a mere thing. Species egalitarianism is the view that all species have equal moral standing[1].

What does the quote All animals are equal but?

A proclamation by the pigs who control the government in the novel Animal Farm, by George Orwell. The sentence is a comment on the hypocrisy of governments that proclaim the absolute equality of their citizens but give power and privileges to a small elite.

Who is having dinner with the pigs at the end of Chapter 10?

At the end of Animal Farm, Pilkington and other human farmers come to eat dinner with the pigs at the farmhouse. As the other animals watch through the window, they find they are unable to tell pigs and humans apart.

Why are apex predators critical to ecosystem structure?

Apex predators are important because they operate as a negative feedback on the prey populations, providing ecological stability. Essentially, apex predators promote stability in ecosystems by keeping their prey populations balanced correctly.

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How did the removal of starfish affect the ecosystem?

Altogether, the removal of the predatory starfish had quickly reduced the diversity of the intertidal community from the original 15 species to eight. For the animals and algae of the intertidal zone, the important resource was real estate—space on the rocks.

How did the kelp forest ecosystem change after sea otters were removed?

They eat sea urchins and other invertebrates that graze on giant kelp. Without sea otters, these grazing animals can destroy kelp forests and consequently the wide diversity of animals that depend upon kelp habitat for survival.

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