EVOLYUTSİYA VA EKOLOGİYA: TABİİY TANLANİSH HAMDA ATROF-MUHİT TA’SİRİNİNG SİNTEZİ
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Аннотация:
Kvaternary davrdagi iqlim o‘zgarishlari va turlarning javobi tahlil qilinadi hamda makroevolyutsiya jarayonida punctuated equilibria (to‘xtovsiz muvozanat) nazariyasi qo‘llab-quvvatlanadi. Tadqiqot shuni ko‘rsatadiki, stazis — turlarning uzoq vaqt davomida sezilarli o‘zgarishsiz qolishi — keng tarqalgan holat bo‘lib, hatto dramatik iqlim o‘zgarishlari mavjud bo‘lsa ham saqlanadi. Asta-sekin o‘zgarishlar tabiiy tanlanishdan tashqari jarayonlar natijasida yuz beradi. Allopatrik spesiyatsiya turlar ajralishining asosiy mexanizmi sifatida ko‘riladi, stazis esa orbital o‘zgarishlar ta’siridagi o‘zgaruvchan atrof-muhit sharoitida ham faol jarayon sifatida namoyon bo‘ladi.
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