عامة

إكتشف كيف استطاع “14 ذئبـــــــــا” تحسين و تغيير جغرافية منتزه يلوستون الامريكي الوطني!

في سنة 1995 ، تم إطلاق” 14 ذئبــــــا” في منتزه يلوستون الامريكي الوطني ، مساحته ضخمة حوالي 4000 ميل مربع ، لم يشك العلماء بتغيير النظام البيئي للحديقة بالكامل بشكل جذري .

لم يكن هناك ذئاب في الحديقة لمدة 70 سنه ، فساد الغزلان هناك طول ذك الوقت ، على مدار سنين من التكاثر غير المنضبط تم إلحاق أضرار جسيمة بالحياه النباتية ،

– طبعا الذئاب الــ14 لم تأكل كل الغزلان ، لكن أجبرهتم على اختيار أماكن للرعي بعناية وتجنب بعض أجزاء الحديقة ، بدأت النباتات في النمو والحياة . لمدة 6 سنين ، زاد عدد الأشجار خمس مرات ، ظهر القنادس التي تحتاج الأشجار لبناء السدود علي المجاري المائيه والانهار . ظهر الفطر والبط والأسماك في المناطق النائية ، قللت الذئاب من حيوان ابن آوى ، فادي لزيادة في عدد الأرانب البرية والفئران ، و بدورها اجتذبت الصقور والنسور والتعالب والدببة إلى الحديقة ،

لكن الأكثر إثارة للدهشة أن الذئاب غيرت مجرى الأنهار . قنواتهم تم تقويمها واستقرت ، انخفض التآكل الساحلي حصل كل هذا لأن تأثير الذئاب على الغزلان أدى إلى النمو الهائل للأشجار والعشب على ضفاف الأنهار ، مما أدى إلى تقويتها تغيرت جغرافية المتنزه نفسه ، بسبب الذئاب الأربعة عشر.

Wahid Mahad

تقييم المستخدمون: 4.6 ( 1 أصوات)

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