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Şimdi ise yok oluşun altıncı dalgasının başlangıcıyla ilgili ilk işaretleri gören bilim insanları, toplu ölümlerin bu sefer insanoğlunu da etkileyebileceğine dikkati çekiyor.</p> <p class="MsoNormal">Science Advances dergisinde yayımlanan araştırmada altıncı dalga toplu ölümlerinin başladığı ve bu dalgada türlerin daha önceki evrelere kıyasla yüz misli daha çabuk yol olacakları belirtilmekte. Princeton, Stanford ve Berkeley Üniversiteleri yakında insanların da kurbanlar arasında yer alabilecekleri konusunda uyardılar.</p> <p class="MsoNormal">Meksika Ulusal Özerk Üniversitesi’nden Gerardo Ceballos ise bu sürecin geriye çevrilmemesi halinde gezegenimizdeki şartların ancak milyonlarca yıl sonra düzelebileceğini söylüyor.</p> <p class="MsoNormal"><b style="mso-bidi-font-weight:normal">TÜR ÖLÜMLERİNİN NEDENLERİ</b></p> <p class="MsoNormal">Araştırmacılar analizleri için fosillerle veya diğer verilerle belgelenen omurgalı türlerin yok oluşlarını değerlendirdi. Bulgular kaba tahminlere dayanıyor. Bilim insanları günümüzdeki tür ölümleriyle ilgili oranları, dünyada henüz insanın bulunmadığı zamanlardaki yok oluşlarla karşılaştırdı. Daha önceki evrelerde yüzyıl başına 10.000 omurgalıdan ikisi ölmüş. Bu oran geçen yüzyılda 114 misli kadar daha yüksekti. Üstelik de bu en iyimser tahmindi.</p> <p class="MsoNormal">Tür ölümlerindeki hızlanma nedenleri arasında en başta iklim değişimi, çevre kirliliği ve ormanların yok oluşu gösteriliyor. Dünya Doğayı Koruma Birliği’nin (IUCN) verilerine göre tüm amfibyum türlerinin yüzde 41’i ve tüm omurgalı türlerinin yüzde 26’sının soyları tükenme tehlikesiyle karşı karşıya.</p> <p class="MsoNormal">Araştırmaya katılan bilim insanlarının ortak önerisi şu: 'İnsanlık tehdit altında bulunan türlerin korunması için çok daha fazla çaba harcamalı.' 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