Experimental study on the survival of the water hyacinth (Eichhornia crassipes (Mart.) Solms—Pontederiaceae) under different oil doses and times of exposure

摘要: In the last decades, petroleum activities have in- creased in BrazilianAmazon where there is oil exploration on Urucu River, a tributary of Amazon about 600 km from city Manaus. Particularly, transportation via River to reach refinery Manaus may compromise integrity large floodplains that flank hundreds kilometers this major river. floodplains, plant growth and nutrient cycling are related flood pulse.When spills occur, floating onthe water surface dispersed through wind wave action littoral region, thus affecting vegetation terrestrial aquatic environments. If pollutants enter system, they absorbed by plants distributed food chain consumption, mortality, decomposition. The effect survival these environ- ments virtually unknown. hyacinth (Eichhornia crassipes (Mart.) Solms) has pantropical distribution but native Amazon, often growing high-density popula- tions it plays an important role as shelter source for biota. species well known its high capacity absorb tolerate levels heavy metal ions. To study response under six different doses, ranging 0 150 ml l �1 ,