Development of a fish-based index of biotic integrity (FIBI) for monitoring riverine ecosystems in the Lake Victoria drainage Basin, Kenya

2010 ◽  
Vol 28 (1) ◽  
pp. 23-38 ◽  
Author(s):  
P. O. Raburu ◽  
F. O. Masese
Keyword(s):  
Drainage Basin ◽  
Lake Victoria ◽  
Index Of Biotic Integrity ◽  
Biotic Integrity ◽  
Riverine Ecosystems

scholarly journals Using the Multi-metric Index of Biotic Integrity methodological approach to determine the major river catchment that most pollutes a lake

2021 ◽  
Vol 24 (1) ◽  
pp. 12-20
Author(s):  
Christopher Mulanda Aura ◽  
Chrisphine S. Nyamweya ◽  
James M. Njiru ◽  
Reuben Omondi ◽  
Julius Manyala ◽  
...  
Keyword(s):  
Lake Victoria ◽  
Methodological Approach ◽  
Index Of Biotic Integrity ◽  
Environmental Data ◽  
Biotic Integrity ◽  
Lake Ecosystem ◽  
Wet Season ◽  
Pollution Levels ◽  
Fish Samples ◽  
Major River

Abstract We present the Multi-metric Index of Biotic Integrity methodological approach that allows for the ranking of major river catchments based on pollution status in the Kenyan portion of Lake Victoria, Africa. The study has a broader applicability to all of Lake Victoria, other African Great Lakes, and all lakes that have riverine discharge. The method presented utilizes water quality and environmental data, local knowledge, and pre-existing literature. The parameters considered were sampled from 2016 to 2018 during the dry season (July sampling) and the wet season (March sampling). Separation power of Mann-Whitney U test (p < 0.05) qualified 11 discriminant metrics for both macroinvertebrate and fish samples into the scoring system of 1, 3 and 5 in the formulation of final Multi-metric Index of Biotic Integrity methodological approach. Rivers in the northern section had lower Multi-metric Index of Biotic Integrity methodological approach scores, as compared to southern counterparts. The Multi-metric Index of Biotic Integrity methodological approach ranking herein was validated by community perceptions on pollution levels. River Nzoia catchment emerged as the most polluted, followed by River Yala, River Kuja, and Sondu-Miriu. Siltation, domestic washing, litter and refuse emerged as the main agents of pollution. Management authorities ought to reinforce a balanced utilization of the vital water resources to minimize future impacts, and promote catchment wide practices that ensure ecological health sustainability of the lake ecosystem.

AN INDEX OF BIOTIC INTEGRITY FOR FISH ASSEMBLAGES IN OZARK HIGHLAND STREAMS OF ARKANSAS

2003 ◽  
Vol 2 (3) ◽  
pp. 447-468 ◽  
Author(s):  
Daniel C. Dauwalter ◽  
Edmund J. Pert ◽  
William E. Keith
Keyword(s):  
Fish Assemblages ◽  
Index Of Biotic Integrity ◽  
Biotic Integrity ◽  
Highland Streams

Development of an Index of Biotic Integrity for the Mid-Atlantic Highlands Region

2001 ◽  
Vol 130 (5) ◽  
pp. 857-877 ◽  
Author(s):  
Frank H. McCormick ◽  
Robert M. Hughes ◽  
Philip R. Kaufmann ◽  
David V. Peck ◽  
John L. Stoddard ◽  
...  
Keyword(s):  
Index Of Biotic Integrity ◽  
Biotic Integrity

scholarly journals Effect of environmental quality and mesohabitat structure on a Biotic Integrity Index based on fish assemblages of cerrado streams from Rio Cuiabá basin, Brazil

2011 ◽  
Vol 71 (3) ◽  
pp. 577-586 ◽  
Author(s):  
NG Machado ◽  
EM. Venticinque ◽  
J. Penha
Keyword(s):  
Environmental Quality ◽  
Fish Assemblages ◽  
Index Of Biotic Integrity ◽  
Biotic Integrity ◽  
Spearman Correlation ◽  
Aquatic Habitats ◽  
Integrity Index ◽  
Negative Impacts ◽  
Composition Structure ◽  
Biotic Integrity Index

Over the last 30 years, the Cerrado has been experiencing various antropic impacts that have brought about alterations to species composition, structure and functioning of aquatic habitats. Therefore, studies on negative impacts are useful to prevent future damage and restore environmental quality. The objectives of our study were: i) to adapt an index of biotic integrity of streams in the Rio Cuiabá Basin and ii) to analyze if the Index of Biotic Integrity (IBI) correlated with the environmental quality measured by the Index of Environmental Quality (IEQ) and with the mesohabitat structure. We sampled 26 streams in sub-basins of the Cuiabá River. In each stream, we closed a stretch of 50 m with blockage nets and used electrofishing to capture fish. To obtain a measure of environmental quality in sampled units, we characterized the stream and its micro basin. For the analyses, we used the Spearman Correlation, Kruskal-Wallis test and Analysis of Multiple Regression. We collected 697 individuals distributed into 6 orders, 15 families and 49 species. The IBI followed changes on environmental quality measured by IEQ when we removed streams that present natural barriers from the analysis (r² = 0.4; r² = 0.58). Types of land use did not affect the biotic integrity (n = 26; df = 4; H = 4,860; p = 0.302), but natural and artificial barriers affected it (n = 26; df = 4; H = 11,027; p = 0.026). The IBI was not sensitive to variations in mesohabitat structure (F2,23 = 0.373; r² = 0.031; Axe 1 p = 0.620; Axe 2 p = 0.490). The IBI is certainly a reasonable instrument for evaluating changes in the environment, but we cannot ignore the fact that we were able to obtain the same result with any combinations of metrics. This makes its analysis and interpretation difficult.

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