Research Article
Diversity of Cyanobacteria in Some Polluted Wetlands of Nkwen in Bamenda (North-West, Cameroon)
Issue:
Volume 4, Issue 2, June 2024
Pages:
42-54
Received:
6 January 2024
Accepted:
23 January 2024
Published:
6 June 2024
Abstract: Human activities more and more intensify the pollution of aquatic ecosystems. These pollutants lead to some Cyanobacteria proliferation causing “blooms” or “efflorescence” and disappearance of sensitive species. The aim of the study was to determine the composition and variation of Cyanobacteria community in some polluted wetlands of Nkwen in Bamenda. Sampling of Cyanobacteria took place from October 2022 to September 2023 by using plankton net for phytoplankton and scrubbing for periphyton. Some hydromorphological and physicochemical parameters of water were measured in situ and in the laboratory. Results showed that species richness of microalgae amounted to 11 families divided into 22 genera and 46 species. Oscillatoriaceae constituted the most important family (26.66% with 12 species) of the Cyanobacteria community, in the study sites. Shannon-Weaver’s index was weak and varied between 1.24 (site 6) and 2.65 (site 2). These results showed that wetlands of Nkwen had a Cyanobacteria community more abundant where the water velocity is low, with high nitrates and phosphates contents. Different Cyanobacteria families with strong proliferation in polluted waters (sites 1, 2 and 3) were: Oscillatoriaceae, Gloeotrichiaceae, Rivulariaceae, Nostocaceae, Merismopediaceae, Microcoleaceae, Microcystaceae and Tolypotrichaceae. On the other hand, the families abundantly present in less polluted waters (sites 4, 5 and 6) were: Chroococcaceae, Pseudanabaenaceae and Aphanizomenonaceae. Thus, physicochemical parameters have an influence on the composition and structure of Cyanobacteria community in wetlands of Nkwen in Bamenda. Monitoring, based on biological indices of Cyanobacteria, could be developed to prevent the risks of perturbation of these wetlands.
Abstract: Human activities more and more intensify the pollution of aquatic ecosystems. These pollutants lead to some Cyanobacteria proliferation causing “blooms” or “efflorescence” and disappearance of sensitive species. The aim of the study was to determine the composition and variation of Cyanobacteria community in some polluted wetlands of Nkwen in Bamen...
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Research Article
Honeybee Floral Diversity of Gemachis Forest, West Hararghe Zone, Oromia Regional State, Ethiopia
Dema Dugda*,
Admassu Addi
Issue:
Volume 4, Issue 2, June 2024
Pages:
55-67
Received:
27 December 2023
Accepted:
29 May 2024
Published:
14 June 2024
Abstract: The study was conducted in Gemachis forest from October 2019 to November 2020, which is an important area of biodiversity conservation, tourism attraction and carbon sequestration for modulating climate change. The forest is also very important for honey production and other non-timber forest products. The study was designed with the objective of assessing honey bee floral diversity of the forest. For the inventory of bee forages a transect line were made in three selected altitudinal strata. Honey samples also were obtained from the three agro ecologies of the forest: Arer (high altitude), Chafe kebene (medium altitude) and Sororo (low altitude). The pollen spectrum of the honey was analyzed to determine the botanical and geographical origin of the honey. According to inventory of the honeybee flora, forty-eight (48) bee plant species were identified; belonging to 33 families, of which Fabaceae, Roseaceae and Verbenaceae were the most frequent families in the study area. Among these bee forages 54.1% were shrub 16.6% were trees and 29.1% were herbs. From identified bee forages, Solanium spp, Andropogon abyssinica, Guizotia spp and Hypoestes forskaolii were the most abundant bee flora species in the study area. The pollen analysis of honey revealed that, two types of monofloral honey types were identified in the area which includes Guizotia spp and Eucalyptus globulus accounting for 74.9% and 54.9% pollen frequency respectively. Thus, beekeepers should conserve the forest for sustainable honey production since the forest is endowed with good honeybee plant diversity.
Abstract: The study was conducted in Gemachis forest from October 2019 to November 2020, which is an important area of biodiversity conservation, tourism attraction and carbon sequestration for modulating climate change. The forest is also very important for honey production and other non-timber forest products. The study was designed with the objective of a...
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,
Muyang Rosaline Fosah
