Explain how the killer whale-sea otter-urchin food web is an example of top-down control.
Explain how the killer whale-sea otter-urchin food web is an example of top-down control.
Homework Answers
In the marine,food web top to
down control can be well seen in whale---->sea
otter------>sea urchin.
The density of sea otter is higher in , upper open zone of sea water so, killer whale fed upon them.
& For survival sea otters fed upon -sea urchin ,present at bottom portion of sea water.
Thus , the density of these marine animals is well maintained by their food web in top to down manner.
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Explain how the killer whale-sea otter-urchin food web is an
example of top-down control.
Using data provided in the table below, calculate how many whales feeding exclusively on sea otters...
Using data provided in the table below, calculate how many whales feeding exclusively on sea otters it would take to eat 40,000 sea otters. (p. 117) For this answer, you should do your calculation by hand on a separate paper, showing your work. Take a snapshot of that paper and insert it into this document using Insert Picture in Word. C. Could predation by killer whales account for a 90 percent decrease in otter numbers? If increased predation by killer...
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Using data provided in the table below, calculate how many whales feeding exclusively on sea otters it would take to eat 40,000 sea otters. (p. 117) For this answer, you should do your calculation by hand on a separate paper, showing your work. Take a snapshot of that paper and insert it into this document using Insert Picture in Word. C. Could predation by killer whales account for a 90 percent decrease in otter numbers? If increased predation by killer...
5. The study of marine food goes beyond that of following the fate of energy across levels (i.e., trophodynamics). Trophic relationships class we disscussed two ways in which trohic control change population abundance, the top- trophic can also control population abundance. In down and the bottom-up trophic control. Let's assume a food chain with four trophic levels: phyoplankton, krill, baleen whales, and killer whales. simplified Southern Ocean marine increasing their attack rate on baleen whales. Describe how top-down control changes...
Ecosystems How is food chain different from a food web? Explain the difference between gross primary production and net primary production? What is the role of plant metabolism (respiration) in productivity? Why is energy lost from a food chain? Where does it go? Is it destroyed'? What limits NPP? What patterns exist in NPP in oceans vs terrestrial ecosystems? Are nutrients involved with NPP? Which ones? What trophic level (group of organisms) is needed for every ecosystem? What do the...
5. Which is each of the following scenarios an example of:
bottom-up control or top-down control?
a. Adding nitrogen to grassland results in an increase in grass
production (biomass), grasshopper numbers and bird numbers.
b. Biomanipulation
6
Examine the visual above.
Which island has the greatest number of species?
Which island has the lowest extinction rate?
Mainland
Please draw/explain each step, thanks.
Perform Bellman-Ford algorithm to the following example, with edges ordered top down, left to right 1 A 5 2 -1 S 1 -2 4
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