home icon user icon
Welcome to International Network for Natural Sciences | INNS Pub.
Home My Account
Submit Manuscript
double_slash
breadcumb_bg

Estimation of primary production along gradients of the middle course of Imo River in Etche, Nigeria

Paper Details

Research Paper 01/08/2011
Views (308) Download (6)
current_issue_feature_image
publication_file

Estimation of primary production along gradients of the middle course of Imo River in Etche, Nigeria

Dike Henry Ogbuagu, Adedolapo Abeke Ayoade
Int. J. Biosci.1( 4), 68-73, August 2011.
Certificate: IJB 2011 [Generate Certificate]
Key: Community respirationEtcheOligotrophicPhytoplanktonPrimary production

Abstract

Dynamics in spatial yields of primary production in the middle course of the Imo River in Etche, South-eastern Nigeria has been investigated. At seven sampling locations along the course of the river, in situ measurements for water temperature, pH, turbidity, and dissolved oxygen (DO) were made with HORIBA U-10 Water Quality Checker. The light and dark bottle technique was used to measure primary production. Wide variations were observed in turbidity (11.0-279.0, mean = 96.7 ± 9.3 NTU), DO (4.50-8.81, mean = 6.96 ± 0.14mg/l), and sulphate (0.90-8.10, mean = 4.35 ± 0.25mg/l) across the sampling locations. Gross and net primary production (GPP & NPP) as well as community respiration (CR) ranged from 0.10-11.2 (0.9 ± 0.2), 0.1-1.0 (0.4 ± 0.03), and 0.02-0.5 (0.2 ± 0.02) mgO2l-1d-1, respectively. Sampling location 1 showed the highest GPP, NPP, and CR of 0.9, 0.6, and 0.3 mgO2l-1d-1, respectively while location 7 showed the least GPP of 0.6 mgO2l-1d-1, and locations 2-7 the least CR of 0.2mgO2l-1d-1each. At P<0.01, GPP correlated negatively with turbidity (r=-0.322) and sulphate (r=-0.297), NPP correlated negatively with turbidity (r=-0.592), nitrate (r=-0.435), phosphate (r=-0.365), and sulphate (r=-0.594) and CR correlated negatively with turbidity (r=-0.547), nitrate (r=-0.405), phosphate (r=-0.304), and sulphate (r=-0.551). Marked variance in means of primary production attributes at P<0.05 was mostly observed in sampling locations 1 and 4.The observed oligotrophic production of the river was most probably due to low nutrient levels and high turbidity, which blankets off sunlight necessary for photosynthesis.

VIEWS 7
Cover PDF

Adams SM. 2003. Establishing causality between environmental stressors and effects on aquatic ecosystems. Human and Ecol. Risk Assess. 9(1), 17-35.

Adeniji HA. 1980. Vertical distribution of pelagic primary production in Kainji Lake.K.L.R.I. Annual Report 23-27.

Adeniji HA. 1990. Limnology and biological production in the pelagic zone of Jebba Lake, Nigeria.Ph.D. Thesis, University of Ibadan, Nigeria, p. 293.

APHA (American Public Health Association). 1998. Standard  Methods  for  the  Examination  of Water and Wastewater. 20th ed. APHA/AWWA/WEF: Washington DC.

Bortnikova SB, Smolyakov BS, Sidenko NV, Kolonin GR, Bessonova EP, Androsova NV. 2001. Geochemical consequences of acid mine drainage into a neutral reservoir: inorganic precipitation and effects on plankton activity. Jr. Geochem. Explor. 74, 127-139.

Campbell PGC, Stokes PM. 1985. Acidification and toxicity of metals to aquatic biota. Can. Jr. Fish. Aquat. Sci. 42, 2034-2049.

Global Change. 2008. The flow of energy: primary production to higher trophic levels. The Reagents of the University of Michigan, from http://www.globalchange.umich.edu (Retrieved 09/01/2011).

Guildford SJ, Hecky RE. 2000. Total nitrogen. Total phosphorus, and nutrient limitation in lakes and oceans: Is there a common relationship? Limnol. Ocean. 45, 1213-1223.

Hargreaves JW, Whitton BA. 1976. Effect of pH on tolerance of Hormidium rivulare to zinc and copper. Oecologia 26, 235-243.

Ikenweiwe NB, Otubusin SO. 2005. An evaluation of the pelagial primary productivity and potential fish yield of Oyan Lake, South Western Nigeria. The Zoologist 3, 46-57.

Mbagwu IE, Adeniji HA. 1994. A review of the studies on the limnology of Kainji Lake, Nigeria. A Report submitted to the Nigerian/German (ETZ) Kainji Lake Fisheries Promotion Project, New Bussa, Niger State, Nigeria, p. 10.

Samaan AA. 1971. Report on the trip on Lake Nasser to investigate its primary production during March 1971. Alexander Institute of Oceanography and Fisheries.

Simmons JA, Long JM, Ray JW. 2004. What limits the productivity of acid mine drainage treatment ponds? Mine Water and the Env. 23, 44-53.

Spaak P, Bauchrowitz M. 2010. Environmental influences and plankton dynamics. Eawag: Swiss Federal Inst. Aquat. Sc. Technol. 69e, 25-27.

Vaillancourt RD, Marra J, Barber RT Jr. WO. 2003. Primary  productivity  and in  situ quantum yields  in  the  Ross  Sea  and  Pacific  Sector  of  the Antarctic  Circumpolar  Current.   Deep-Sea  Res. 11(50), 559-578.

Submit Manuscript