Temperature responses and evolution of thermal traits in Cladophoropsis membranacea (Siphonocladales, Chlorophyta)

摘要: Temperature tolerances and relative growth rates were determined for different isolates of the tropical to warm temperate seaweed species Cladophoropsis membranacea (C. Agardh) Boergesen (Siphonocladales, Chlorophyta) some related taxa. Most C. survived undamaged at 18 degrees C least 8 weeks. Lower temperatures (5 degrees-15 C) tolerated shorter periods time but caused damage cells. All up 34 C, whereas from eastern Mediterranean Red Sea higher 36 Growth occurred between 32 an isolate had extended range, reaching its maximum 35 Struvea anastomosans (Harvey) Piccone & Grunow, sundanensis Reinbold, c. Hawaii slightly less cold- tolerant, with occurring Upper survival in these response data mapped onto a phylogenetic tree. Tolerance low appears be derived character state that supports hypothesis originated strictly ancestor. Isolates Canary Islands, which is near northern limit distribution, are ill adapted local temperature regimes. show adaptation stress. They isolated those Atlantic by thermal barrier entrance Mediterranean.