Interpret the Data: Feeding Relationships Among Sea Otters, Sea Urchins, and Kel

Question

Interpret the Data: Feeding Relationships Among Sea Otters, Sea Urchins, and Kelp 3of 16 You decide to study fooding relationships among soa otters, soa urchins, and loelp. You know that sca oters prey on sea urchina and that urchins eat kolp. At four coastal ahes, you measuro kelp abundance Then you spend one day at each site and mark whother otters are present or absent every S minutos during the day Otter Density n sightings per day) 08 18 85 36 Kelp Abundance (% cover) 75 15 60 25 Site -Part A Mako a graph that shows how koip abundance depends on ator danaity, using the data in the tabla For more help using the graphing tool open the Use the data in the table to make a line graph. To create the graph first click on add graph and select the label Kelp abundance % cover). hint.) View Available Hints) Correct -Part B What hypothesis best explains the pattern seen in your graph? Otter activity aeraies the water and makes itmore suitable fer kelp growth Otters prey on sea urchins, which reduces urchin feeding on kelp When sea urchins are present, otlers prefer to eat urchins rather than kelp Otters compete with sea urchins for kelp, which reduoes urchin feeding on kelp.

Explanation / Answer

Kelp are brown algae. These sea weeds produce oxygen by absorbing carbon dioxide. Sea urchins feed on sea Kelp. Sea otters prey on sea urchins which feed on Kelp. Thus by feeding on sea urchins, sea otters help in increasing the abundance of Kelp. So, the correct option is option B, Otters prey on sea urchins, which reduces urchin feeding on kelp.

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