Living organisms influence on environmental conditions: pH modulation by amphibian embryos versus aluminum toxicity.

摘要: Abstract The LC10, 50 and 90/24 h of aluminum for Rhinella arenarum embryos at complete operculum stage were 0.55, 0.75 1 mgAl3+/L respectively. Those values did not change significantly by expanding the exposure period till 168 h. toxicity was evaluated in different pH conditions means a citrate buffer resulting instance, 4, 4.1, 5 6 100%, 70%, 35% 0% lethality As an outstanding feature, changed maintaining media both case Al3+ or treatments toward neutral. 10 40 mL AMPHITOX solution able to increase from 4.2 7.05, fact related with metabolic shift nitrogen loss as ammonia. Our study point out natural selection most resistant amphibian well capacity living organisms (as population) alter their chemical environment optimal survival. these facts occur early life stages, it expand concept that ontogenic stages are biomarker environmental signatures evolutionary process (Herkovits, 2006) global Onto-Evo which imply also feedback mechanisms shape way benefits them.