Tafkin Bermin

Tafkin Bermin (wani lokacin ana rubuta shi Bemin ko Beme) ƙaramin tafki ne a cikin sarkar dutsen wuta a Yankin Kudu maso Yamma Kamaru . tafkin dutsen wuta ne mai diamita kusan 700 metres (2,300 ft) m (2,300 da kuma rami wanda ya tashi zuwa tsawo na kimanin 150 feet (46 m) . Wannan tafkin da aka ware sosai yana da siffar zagaye, ba shi da shigarwa, amma yana da fitowa cikin tsarin Cross River. Ilimin halittu Duk da ƙanƙantar girmansa, yana tallafawa nau'ikan kifayen coptodonine cichlid guda tara ( C. bakossiorum, C. bemini, C. bythobates, C. flava, C. gutturosa, C. imbriferna, C. snyderae, C. spongotroktis, da C. thysi ). Wannan adadin kifayen da ke cikin yanayi a kowane yanki shine mafi girman da aka rubuta a ko'ina. Shaidun farko na kwayoyin halitta sun nuna cewa waɗannan wataƙila sakamakon sympatric speciation ne. Nazarin da aka yi daga baya ya nuna matakin kwararar kwayoyin halitta na biyu tsakanin Bermin cichlids da Cross River C. guineensis, kodayake ba a san ko wannan ya sauƙaƙa rarrabuwar kwayoyin halitta tsakanin tsohuwar ƙungiyar ba. Su ne radiation na baya-bayan nan. Suna da kama sosai a yanayinsu na gabaɗaya da yanayin halittarsu amma sun bambanta sosai a yanayin ciyarwa, gami da ƙwararru kamar C. spongotroktis waɗanda ke cin guntun manyan soso da ke girma a cikin tafkin. Cichlids na Tafkin Bermin ƙananan kifaye ne, babu wanda ya wuce 14 cm (5.5 in) a tsawon da aka saba . A har zuwa 5 cm (2 in) a tsayin da aka saba, C. snyderae shine mafi ƙarancin tilapia da aka sani. Dukkanin Bermin cichlids suna cikin haɗari ta hanyar 2" href="./Pollution" id="mwhQ" rel="mw:WikiLink" title="Pollution">gurɓataccen yanayi da raguwa daga ayyukan ɗan adam, kuma mai yiwuwa kuma ta hanyar manyan hayaki na carbon dioxide (CO2) daga kasan tafkin (idan aka kwatanta da Tafkin Nyos), kodayake Bermin ya yi zurfi sosai don ƙunshe da yawan wannan gas. Manazarta