Temporal Variations of Water Quality Parameters, Phytoplankton, And Invertebrates In Environmental Change Hotspots: A Case of Lake Wamala, Uganda
Journal Title: JOURNAL OF ADVANCES IN AGRICULTURE - Year 2019, Vol 10, Issue 0
Abstract
Lake Wamala (Uganda) is a small shallow lake (maximum mean depth = 4.5m) that has periodically undergonefluctuations in depth and area because of changes in rainfall, temperature and wind speed. No study, however,has been done to assess how these changes, in addition to catchment degradation, which are likely to intensify in future, have affected aquatic productivity processes. Data on Secchi depth (SD), turbidity, conductivity, dissolved oxygen (DO), total phosphorous (TP), soluble reactive phosphorus (SRP), soluble reactive silicon (SRSi), ammonia (NH4-N), nitrite nitrogen (NO2-N), nitrate nitrogen (NO3-N), Chlorophyl a, composition and abundance of algae, and invertebrates were compared between periods 1998-2000 and 2011-2013. Results showed a twofold increase in conductivity and TP, a threefold increase in SRSi, chlorophyll a > 25 ?g l-1, and persistence by low water transparency (SD < 0.7 m). In consequence, algal biomass increased by >70%, with emergence of new species, especially among the dinoflagellate and euglenophyte groups. Although rotifers, which are known to have capacity to withstand stressful habitat conditions, dominated the zooplankton, their density decreased by >80%. The phantom-midge, chaoborus, and the midge, chironomid, larvae dominated macro-invertebrate, but did not show clear trends between the two periods.
Authors and Affiliations
Shamim Naigaga
Keywords
Related Articles
- EP ID EP652495
- DOI 10.24297/jaa.v10i0.8396
- Views 181
- Downloads 0
SUGAR BEET YIELD AND QUALITY AS AFFACTED BY WATER REGIME BEFOR HARVEST, DENSITY AND SOME CULTIVARS IN NEW RECLAIMED SOILS.
Field experimental was carried out at Kalabsho - El-Dakhlia Governorate, Egypt,  in 2013/14 and 2014/2015 winter growing seasons. To study effect of last regime irrigation before harvest by 15 and 30 days and spacing...
The Mechanism Behind the Promotive Effect of Foliar Application of 5-Aminolevulinic Acid (ALA) in Tomato Plants Under Salt Stress
The effect of foliar ALA application on the internal ALA concentration in tomato plants grown in soil containing high levels of NaCl was investigated. Six week old plants were treated with 100, 50, and 25 mmol/L Na...
The Effect of Harvesting Time and Variety on Fiber andCottonStalkYield Potential and its Companent for Use in the Pulp andPaperIndustry
Survey of cotton fiber yield, in addition to the identification of its best variety can cause cotton residual enhancement. The remainder of cotton stalk in farms is an illness-causing agent and leads to yield reduction i...
Fluidized bed technology for biooil production: Review
Fast pyrolysis is an emerging technique by which a liquid product, biooil is formed. The fast pyrolysis can be done using various reactors such as fluidized bed reactors, transported and circulating fluidized bed reactor...
Evaluation of Endogenous Sugars, Chlorogenic Acid and Caffeine Associated with Direct Somatic Embryogenesis of Coffee (Coffea arabica L.)
Coffee is one of the most important cash crops cultivated in the world with great economic importance. During the induction of somatic embryogenesis, there are different endogenous compounds involved in the success or fa...