Örümcek Ağları ve Elektrik


Oxford Üniversitesi'nin Zooloji Bölümü’nde çalışan araştırmacılar, örümcek ağlarının, üzerlerindeki yapışkan maddelerin elektriksel özellikleri sayesinde esneyebildiğini gösterdi. Örümcek ağları, yakınlarından elektrik yüklü bir cisim geçtiği zaman esniyor ve böylece avların yakalanması kolaylaşıyor.

Araştırma grubunun lideri Prof. Vollrath, neredeyse tüm uçan böceklerin elektriksel alandaki değişimleri algılayabildiğini belirtiyor. Bu hayvanların sahip olduğu antenler, bir duyu işlevi görüyor. Antenlerin uç kısımları elektrik yüklü ve antenler gövdeye yalıtkan malzemelerle bağlı olduğu için bu elektrik yükü vücudun diğer kısımlarındakinden farklı. Böcekler elektrik yüklü cisimlere yaklaştığı zaman antenler elektriksel kuvvetler nedeniyle hareket ediyor ve bu hareket böcekler tarafından algılanıyor. Böylece elektrik yüklü cisimler fark edilebiliyor. Araştırmacılar, antenleri sayesinde böceklerin örümcek ağlarını da algılayabileceğini belirtiyor. Ancak örümcek ağlarındaki elektrik yükü görece küçük olduğu için böcekler, ağları ancak ağlara birkaç milimetre mesafedeyken algılayabilir ki, bu mesafe böceklerin örümceklere yem olmaktan kurtulabilmesi için yeterli olmayabilir.

Örümcek ağlarına takılanlar sadece avlar değil. Hava ile taşınan pek çok madde de örümcek ağlarına takılıyor. Araştırmacılar bu durumun çevre kirliliği hakkında veri toplamak için kullanılabileceğini söylüyor. Çevre kirliliğine sebep olan bazı maddeler de hava ile taşınırken örümcek ağlarına yapışıyor. Teknoloji ürünü pahalı aletler kullanmak yerine örümcek ağlarına takılan maddeleri inceleyerek de çevre kirliliği hakkında bilgi toplanabilir.

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