Q1.7. Another set of nutrient addition experiments is conducted on two additiona
ID: 258429 • Letter: Q
Question
Q1.7. Another set of nutrient addition experiments is conducted on two additional unknown species of phytoplankton. Results are summarized in the table below. If the two species are grown together under default (baseline) conditions, which of the following will most likely occur and why? Results of Nutrient Addition Experiments, Round Three: Species 4 Species 5 PopN Si Pop N Nutrient Input Rate size (ug/L (ug/) (ug/) 100 4000 100 5000 80 3000 29 4000 99 7999 99 4998 81 6001 23 4003 200 4002 101 4995 152 3001 29 3998 100 4001 98 9999 81 2999 29 7998 size (ug/L (ug/L) (ug/L) Baseline (1x all) 2x P 2x Si Species 4 will outcompete species 5 because it stabilizes at a larger population size than species 5 Species 4 will outcompete species 5 because it has a higher R* than species 5 Species 5 will outcompete species 4 because it has a higher R than species 4 Species 5 will outcompete species 4 because it has a lower R* than species 4Explanation / Answer
Ans. species 4 will outcompete species 5, because it has a higher R than 5.
r-selection predominates in unstable or unpredictable environments. It is advantageous in adaptations that allow successful competition with other organisms.
And this can be seen that the requirement of the nutrition of species 4 is lesser, and they produce large no. of progeny. So it will be more stable over the species 5.
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