A food chain starts from grass → grasshopper → frog → snake → hawk
A food chain starts from grass → grasshopper → frog → snake → hawk. How much concentration of non-biodegradable pesticides is expected in hawk?
एक खाद्य श्रृंखला घास → टिड्डा → मेंढक → साँप → बाज से शुरू होती है। बाज में अजैवनिम्नीकरणीय पीड़कनाशियों की कितनी सांद्रता अपेक्षित है?
Detailed Solution & Logic
The highest concentration of pesticides/ पीड़कनाशकों की उच्चतम सांद्रता
Explanation
In the food chain:
Grass → Grasshopper → Frog → Snake → Hawk,
non-biodegradable pesticides accumulate in the bodies of organisms because they cannot be broken down easily.
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Grass absorbs a small amount of pesticide from the soil.
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Grasshoppers eat many grass plants, accumulating more pesticide in their bodies.
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Frogs eat multiple grasshoppers, so pesticide concentration increases.
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Snakes eat multiple frogs, further increasing the concentration.
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Finally, hawks eat multiple snakes, leading to the highest pesticide concentration in the hawk.
This process is called biological magnification or biomagnification, where the concentration of harmful substances increases at each trophic level of the food chain.
Extra fact: DDT is a classic example of a pesticide that biomagnifies, causing serious harm to birds like hawks and eagles.
इस खाद्य श्रृंखला में:
घास → टिड्डा → मेंढक → साँप → बाज,
अजैवनिम्नीकरणीय (non-biodegradable) पीड़कनाशक जीवों के शरीर में जमा हो जाते हैं क्योंकि ये आसानी से टूटते नहीं हैं।
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घास मिट्टी से थोड़ी मात्रा में कीटनाशक अवशोषित करती है।
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टिड्डे कई घास खाते हैं, इसलिए उनके शरीर में कीटनाशक की सांद्रता बढ़ जाती है।
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मेंढक कई टिड्डे खाते हैं, जिससे पीड़कनाशक और अधिक सांद्र हो जाता है।
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साँप कई मेंढक खाते हैं, और सांद्रता और बढ़ जाती है।
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आखिर में बाज कई साँप खाते हैं, जिससे पीड़कनाशक की सबसे अधिक सांद्रता बाज में होती है।
इस प्रक्रिया को जैविक वृद्धिकरण (Biological Magnification / Biomagnification) कहते हैं।
अतिरिक्त तथ्य: DDT एक प्रसिद्ध कीटनाशक है जो जैविक वृद्धिकरण के कारण बाज और अन्य पक्षियों को नुकसान पहुंचाता है।
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