Question

Phytoplanktons→Zooplanktons→Insects→Small fish→Water bird

(i) Which organism in this chain will have lowest energy and highest concentration of

pollutants?​

Answer 1

Answer:

2.7.7 Stratospheric Ozone

The other potential global problem from increased atmospheric pollutant levels, and of chlorofluorocarbons, stable chlorocarbons, and fixed nitrogen in particular, concerns the destructive impact of these gases on the stratospheric concentrations of ozone [81, 82]. The ozone layer, consisting of ozone (O3) concentrations of about 1011 to 1013 molecules/cm3, exists largely in the stratosphere, 11–50 km above the earth’s surface. Ozone formation in this region occurs by the interaction of molecular oxygen with sunlight, followed by the reaction of the atomic oxygen with further oxygen (Fig. 2.10). The details have recently been surveyed [83]. Its value to life on earth is the powerful filtering function that it passively performs on the short-wavelength UV-B (ca. 280–320 nm region) of sunlight before it reaches the earth’s surface (Fig. 2.10). The equilibrium concentrations of ozone present are a resultant of these primary ozone formation and photolytic removal processes.