Pesticide residues in foods are caused by which of the following phenomena?
Food items such as wheat, rice, vegetables, fruits and meat contain varying amounts of pesticide residues due to which of the following phenomena?
गेहूँ, चावल, सब्ज़ियाँ, फल और मांस जैसे खाद्य पदार्थों में निम्नलिखित में से किस घटना के कारण उनमें अलग-अलग मात्रा में कीटनाशी (पेस्टिसाइड) अवशेष पाए जाते हैं?
Detailed Solution & Logic
Biological magnification/ जैविक आवर्धन
📘 Explanation
Biological magnification (Biomagnification) is the process in which the concentration of harmful chemicals such as pesticides increases at each successive level of the food chain.
When pesticides are sprayed on crops, small organisms absorb them. These organisms are eaten by larger organisms, and the chemicals accumulate in their bodies. As the food chain progresses, the concentration of pesticide residues increases.
Therefore, food items like wheat, rice, vegetables, fruits, and meat contain different amounts of pesticide residues because of biological magnification.
🌟 Extra Facts
Biomagnification mainly occurs with non-biodegradable chemicals such as DDT and mercury.
Top consumers in the food chain usually accumulate the highest concentration of toxins.
The harmful environmental effects of pesticides were highlighted in the famous book Silent Spring by Rachel Carson in 1962.
Biomagnification can affect birds, animals, and humans through contaminated food.
📗 व्याख्या
जैविक आवर्धन (Biomagnification) वह प्रक्रिया है जिसमें खाद्य शृंखला के प्रत्येक उच्च स्तर पर कीटनाशकों जैसे हानिकारक रसायनों की सांद्रता बढ़ती जाती है।
जब फसलों पर कीटनाशक छिड़के जाते हैं, तो छोटे जीव इन्हें अपने शरीर में जमा कर लेते हैं। बाद में बड़े जीव इन छोटे जीवों को खाते हैं, जिससे उनके शरीर में कीटनाशकों की मात्रा और अधिक बढ़ जाती है।
इसी कारण गेहूँ, चावल, सब्ज़ियाँ, फल और मांस जैसे खाद्य पदार्थों में कीटनाशक अवशेष अलग-अलग मात्रा में पाए जाते हैं।
🌟 अतिरिक्त तथ्य
जैविक आवर्धन मुख्यतः अविघटनीय (non-biodegradable) रसायनों जैसे DDT और पारा (Mercury) के कारण होता है।
खाद्य शृंखला के उच्चतम स्तर के जीवों में विषैले पदार्थों की मात्रा सबसे अधिक होती है।
कीटनाशकों के पर्यावरणीय प्रभाव को Silent Spring नामक पुस्तक में Rachel Carson ने उजागर किया था।
यह प्रक्रिया मनुष्यों सहित कई जीवों के स्वास्थ्य पर नकारात्मक प्रभाव डाल सकती है।
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