Question

Food web

please explain following questions

1. How does the size of the organism generally relate to its position in the food web? Are there any exceptions to this generalization? Explain your answer.

2. Why is species diversity important to an ecosystem?

3. Some organisms are specialists and dependent on one food source while others are generalists and rely on many different food sources. Which is more able to withstand changes in the ecosystem, specialists or generalists and why is that?

4.What do you think would happen if an oil spill occurred that killed off most of the phytoplankton and zooplankton?

Answer 1

1) In a food chain, the size of an organism relate to its position because of the fact that organisms with larger size could attack & eat smaller & weaker organisms.

2) Species diversity is the amount & variety of species within a particular area. A rich species diversity is necessary for a better health of the biosphere of nation. We can understand the health of an ecosystem by looking at its diversity. If an ecosystem has rich diversity, it is healthy. Example : tropical rainforest. Also, a rich species diversity indicates that ecosystem has a higher stability.

hope it helps.