Use figure one and two, and table one to answer these questions: 1. Do nutrients
ID: 193323 • Letter: U
Question
Use figure one and two, and table one to answer these questions:
1. Do nutrients appear to limit the production of aquatic plants such as algae? What evidence supports your answer?
bcswebdav/pid-776083-dt-content-rid-5648790 1/courses/S 201820 22402 BIOL 01204/Control: Figure 1. Effects of nutrient limitation on marine phytoplankton production in coastal waters of Long Island. a.) indicates the location of experimental sampling stations. b.) shows the results of nutrient-enrichment experiments with the alga Nannochloris atomus in water from the bay From: Ryther, JM and WM Dunstan. 1971. Nitrogen, phosphorus, and eutrophication in the coastal marine environment, Science 171: 1008-1013 50 30 LONG ISLA Shinnacoc Moriches Bay 40 3*00 72 30 30 24 Ammonium enriched Phosphate enriched A Unenriched control 18 Inoculum 231 15 30 19 21 eStation numberExplanation / Answer
1) Yes , the nutrients greatly manifests the growth of aquatic plants. From the figures given here it is evident that Ammonium enriched plants have almost 10 folds greater yields. The highest uptake of C14 is seen in case of N+P+metals and ions.
2) Light is a key variable controlling primary productions in oceans, since solar radiation can penetrate upto a certain depth known as the photic zones.
Temperature is another key factor as metabolic activities are greatly dependent on it.
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