+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Nutrient changes in Saginaw Bay, Lake Huron, after the establishment of the zebra mussel

, : Nutrient changes in Saginaw Bay, Lake Huron, after the establishment of the zebra mussel. Journal of Great Lakes Research 21(4): 449-464

Concentrations of particulate and dissolved nutrients in Saginaw Bay, Lake Huron, were examined relative to zebra mussel colonization which occurred summer 1991. The magnitude and spatial pattern of changes indicate that mussels had a significant impact on nutrients in Saginaw Bay. Annual means for total suspended solids, particulate organic carbon, particulate phosphorus, and particulate silica in the inner bay were significantly lower in 1992 and 1993 (post-zebra mussel) than in 1991 (pre-zebra mussel). Annual means decreased from 11.5 mg L-1, 1.45 mg C L-1 (121 mu-M), 20.4 mu-g P L-1 (0.66 mu-M), and 1.52 mg SiO-2 L-1 (24 mu-M) respectively in 1991 to 4.4 mg L-1, 0.79 mg C L-1 (66 mu-M), 11.2 mu-g P L-1 (0.36 mu-M), and 0.77 mg SiO-2 L-1 (12 mu-M) in 1993. In contrast, there were no significant differences among years for these parameters at control stations, which were located in the outer bay and had no known Populations of mussels. Annual means for nitrate, ammonium, and silica were significantly higher in the inner bay in 1992 than in 1991, but not significantly different in 1993. Means increased from 0.39 mg N L-1, 21.0 mu-g N L-1, and 1.11 Mg SiO-22 L-1 respectively in 1991 to 0.47 mg N L-1, 30.9 mu-g N L-1, and 1.71 mg SiO-2 L-1 in 1992. No significant differences were observed for these parameters in the control group. Differences between 1992 and 1993 may reflect differences in the amount of runoff and circulation between Saginaw Bay and Lake Huron. A phosphorus budget indicated that zebra mussels were a significant sink for phosphorus. Mussels from the inner bay accumulated 108, 682, and 52 t respectively in 1991, 1992, and 1993. Comparatively the annual pool of phosphorus in the water column of the inner bay decreased from a pre-zebra mussel (1979-1980) average of 712 t to 421 and 382 t in 1992 and 1993 respectively.


Other references

Pesce, L., 2007: Impact of chest radiography screening on healthcare spending. American Journal of Managed Care 13(4): 218; Author Reply 218-9

Ayupova, A.T.; Molchanov, L.V.; Kadyrov, C.S.; Aliev, N.A.; Giyasov, K.; Loi, N.P.; Tsoi, Z.; Umarov, A.A., 1979: Investigating the herbicidal activity of derivatives of benzoxazoline and benzoxazolinethione and the relating of activity to structure. The herbicidal activity of N-alkylbenzoxazolin-2-ones and S-alkylbenzoxazoline-2-thiones was investigated. Hansch's correlative equations were used to show that the critical factor determining herbicidal activity was the electron characterist...

Barman, A.K.; Ramakrishna, O.; Sarma, K.K., 1994: Effect of ultrasound on tendon healing in buffalo calves. The superficial digital flexor tendon of left hind limb of 20 buffalo calves were severed and sutured surgically by lateral trap technique. The clinical and histomorphological healing was compared between the control and the treated groups which r...

Patel, C.J.; Beekhan, A.; Paruk, Z.; Ramgoon, S., 2008: Work-family conflict, job satisfaction and spousal support: an exploratory study of nurses' experience. In recognising the highly stressful nature of the nursing profession, the added burden of hospital staff shortages, and patient overload, the present study explored the impact of work on family functioning, its relationship to job satisfaction and...

Biological-Society-Of-Chile, 2000: XLIII Annual Meeting of the Biological Society of Chile, Pucon, Chile, November 14-17, 2000. This meeting contains 282 abstracts in English and Spanish. The topics covered include ecology, neurobiology, microbiology, biochemistry, immunology, cellular biology, botany, and zoology.

Soc Biol Strasb, 1973: Meeting of the societe de biologie de strasbourg biological society of strasbourg strasbourg france june 16 1973. Comptes Rendus Des Seances De La Societe De Biologie Et De Ses Filiales 7: 1033-1051

Thieman, K.M.; Clark, J.; Johnson, P.J.; Essman, S.; Giuliano, E.A.; Mitchell, J., 2007: What is your diagnosis? Rhodococcus equi. Journal of the American Veterinary Medical Association 230(4): 509-510

Branas, J., 1939: Current notes. Development of mildew in southern vineyards in 1939. A detailed account is given of observations on the development of vine mildew made during 1939 in the south of France. Temperature did not appear to be an important factor locally in determining the duration of the incubation period, the chief inf...

Nakhjavani, M.; Esteghamati, A.; Khalilzadeh, O.; Asgarani, F.; Mansournia, N.; Abbasi, M., 2010: Association of macroalbuminuria with oxidized LDL and TGF-beta in type 2 diabetic patients: a case-control study. The pathogenesis of diabetic nephropathy, mainly characterized by macroalbuminuria, is still poorly understood, but it is reported that transforming growth factor-beta (TGF-beta) plays a key role. In vitro evidence suggests that administration of...

Sosa-Melgarejo, J.A.; Berry, C.L., 1992: Myoendothelial contacts in the thoracic aorta of rat fetuses. There is increasing documentation of the presence of endothelial-smooth muscle communication in both small and large arteries. We have found that morphological evidence of these contacts appears early in development. Intimate contacts between endo...