ISSN:
1573-5117
Keywords:
Eutrophication
;
pollution indicator
;
mineral element
;
nitrogen
;
phosphorus
;
Ulva lactuca
;
Hong Kong
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The amounts of tissue nitrogen, phosphorus, potassium, sodium, calcium and iron were estimated in the green alga Ulva lactuca L. collected from 9 rural and 14 urban littoral sites in the waters around Hong Kong Island during 1978 and 1979. The mean levels of tissue nitrogen and phosphorus were respectively 65% and 87% more in urban sites than in rural ones. Very significant correlation (r = 0.920) was found between the logarithmic concentration of seawater inorganic nitrogen and that of tissue nitrogen. The same applied to soluble reactive phosphorus in seawater and tissue phosphorus (r = 0.886). The levels of potassium, sodium and calcium in the alga were relatively uniform. However considerable variation in the level of iron was detected. The potential use of Ulva as an indicator species for eutrophication is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00006386
