Comparing Freshwater Benthic Macroinvertebrate Communities in Forest and Urban Streams of the Coastal Ecological Region of Cameroon

Onana, Fils Mamert; Togouet, Serge Hubert Zébazé; Tamsa, Antoine Arfao; Tchatcho, Nectaire Lié Nyamsi; Tchakonté, Siméon; Koji, Ernest; Yemeli, Armel William Yemtsa; Makong, Abigaelle Natacha Sandrine Mouto

doi:10.4236/oje.2019.912034

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…In addition, the habitats are diversified in these rivers. Indeed, References [16] and [40] noticed that insects dominate in forest waters. In addition, the high taxonomic richness of the class of insects (77 families) would be linked to the several microhabitats within streams seem to present and to testify the low degradation of the environment by anthropogenic activities.…”

Section: Diversity Of Benthic Macroinvertebratesmentioning

confidence: 99%

Spatiotemporal Variation of Benthic Macroinvertebrates in Some Tropical Forest Streams of the Nyong Catchment (Cameroon)

Dzavi¹,

Menbohan²,

Mboye³

et al. 2022

OJAppS

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With the aim of assessing the benthic macroinvertebrates' diversity, a study was carried out in some tropical forest streams of the Nyong River catchment in Cameroon from February 2019 to February 2020. A total of 167 samples were carried out from 13 stations during 13 months. Some environmental variables were measured. These parameters varied more or less from station to station but significantly at the temporal level. In this study, 13,690 benthic macroinvertebrates belonging to 4 phyla, 7 classes, 16 orders and 93 families were collected. The benthic macroinvertebrates were more abundant and more diversified in the stations whose waters are well oxygenated and present a moderate current compared to the stations with a very weak current. The diversity varied significantly from 1.33 ± 0.14 bits/ind to 2.00 ± 0.35 bits/ind and the high values were found in stations with multiple substrates and well-oxygenated waters. Temporally, the diversity varied significantly from 1.10 ± 0.16 bits/ind in NM sampling station in February 2020 to 1.87 ± 0.1 bits/ind in the OB sampling station in September. In addition, the settlement was more abundant during the short dry season, more precisely during the month of August (1471 individuals) but richer during the long dry season during the month of February (54 families). The distribution of the abundances of the benthic fauna in the different stations made it possible to identify five typological groups using the rarefaction curves, the ascending hierarchical classification and the principal component analyses. Each of these five groups is characterized by a specific taxonomic richness, composition and abundance.

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Section: Diversity Of Benthic Macroinvertebratesmentioning

confidence: 99%

Spatiotemporal Variation of Benthic Macroinvertebrates in Some Tropical Forest Streams of the Nyong Catchment (Cameroon)

Dzavi¹,

Menbohan²,

Mboye³

et al. 2022

OJAppS

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“…The aquatic biota is closely linked to water properties and changes in water abiotic variables will affect their population structure. For instance, phytoplankton, that form the basis of aquatic food webs may be used a biomonitors of water abiotic condition [6][7][8][9][10][11]; macrophytes are very useful in nutrient and heavy metals retention and may be exploited in the bioremediation of polluted ecosystems [12,13]; groups such as macroinvertebrates have been reported to be good bioindicators in tropical freshwaters bodies [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Limnology of the Ndongo stream (South-West Cameroon): wastes management, water physicochemical quality and phytoplankton species richness

Daniel Brice Nkontcheu Kenko,

Fabiola Mba Maffo,

Aimerance Donhachi Kenfack

et al. 2023

GSC Biol. Pharm. Sci.

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Freshwater ecosystems are subject to anthropogenic contaminants. This study aimed at assessing waste management stratagem by the local population and implications on water abiotic variables as well as phytoplankton species richness of the Ndongo stream, South-West Cameroon. For this purpose, 144 structured questionnaires were randomly administered to inhabitants around the stream to assess wastes management practices. Water and phytoplankton analysis was done in three selected sites. The mainstream of inhabitants (67%) dumped wastes in facilities provided by the Buea Council. The sorting of wastes before disposal was not common among respondents (72%). Recycling of wastes was done by only 37.8% of inhabitants. Half of the respondents (50.7%) claimed being ready to contribute financially for waste management while 81.2% said they were aware of the consequences of poor waste management. The main source of domestic water in the area was tap water (89.6%) and the Ndongo stream was mainly utilised for washing clothes (47.9%). Water abiotic variables that exhibited significant spatial trends included conductivity, TDS, velocity, width, depth and flow rate. There was no significant difference in the spatial distribution of temperature, pH, salinity and dissolved oxygen. The phytoplankton community was made of 36 species distributed in 37 families. Taxa such as Lynbya sp., Oscillatoria sp. and Closterium sp. were found in all the sampling sites, making them resident species of the stream. The sampling site at the lower course of the stream had the highest phytoplankton species richness. The highest algal pollution index was found in site 3at the lower course of the stream. Species richness had a positive and non-significant correlation with temperature, conductivity, TDS, salinity, velocity, depth and discharge. Water pH, dissolved oxygen and width had a negative and non-significant correlation with species richness. The local population should be educated on wastes management and its implications on the environment.

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“…In industrialized countries, the impact of agriculture, urbanization, industrialization and poor waste management on aquatic environments are well documented [4] [5] [6] [7]. In Cameroon, on the other hand, studies are very patchy, with most of the work carried out so far having been limited to assessing the effects of urbanization on streams [8]- [13]. So far, no study has been devoted to assessing the effects of industrial agriculture on the ecological integrity of streams.…”

Section: Introductionmentioning

confidence: 99%

Effects of Industrial Agriculture and Urbanization on Structure and Functional Organization of Macroinvertebrate of Coastal Streams in Cameroon

Onana¹,

Tamsa²,

Tchakonté³

et al. 2021

JWARP

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The impact of land use changes on watercourses is poorly documented in Cameroon. Therefore, this study examines the effects of agriculture and urbanization on water quality, the structure and functional organization of macroinvertebrates of streams in the coastal zone of Cameroon. Nine sampling stations including three per catchment area with different land occupations (agricultural, urban and forest) were selected. Benthic macroinvertebrates were sampled monthly from February to July 2018 and the physicochemical variables were measured simultaneously. The urban and agricultural streams showed highly polluted waters with high nutrient and suspended matter content, whereas the forest stream waters are moderately polluted. In addition, the hierarchical ascending classification indicated a proximity in water quality between the agricultural and forest streams for which the main physicochemical variables did not vary significantly. With regards to macroinvertebrates, the forest watercourse is characterized by the proliferation of pollution-sensitive taxa, high diversity indices and complex trophic structuring, indicating its good ecological status. In contrast the urban watercourse, heavily polluted is characterized by low diversity indices reflecting a simplification of the structure of stands dominated by the pollution-tolerant collector-gatherer stands. The majority of biological indices and functional feeding groups were not significantly different between the agricultural and forest streams, sug

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Comparing Freshwater Benthic Macroinvertebrate Communities in Forest and Urban Streams of the Coastal Ecological Region of Cameroon

Cited by 5 publications

References 16 publications

Spatiotemporal Variation of Benthic Macroinvertebrates in Some Tropical Forest Streams of the Nyong Catchment (Cameroon)

Spatiotemporal Variation of Benthic Macroinvertebrates in Some Tropical Forest Streams of the Nyong Catchment (Cameroon)

Limnology of the Ndongo stream (South-West Cameroon): wastes management, water physicochemical quality and phytoplankton species richness

Effects of Industrial Agriculture and Urbanization on Structure and Functional Organization of Macroinvertebrate of Coastal Streams in Cameroon

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