Green algal interactions with physicochemical parameters of some manmade ponds in Zaria, northern Nigeria

Abstract

-(Green algal interactions with physicochemical parameters of some manmade ponds in Zaria, northern nigeria). Green algal species and their association with physicochemical parameters in some manmade ponds in Zaria, nigeria were studied from november 2005 to august 2006. Phytoplankton and water samples were collected, preserved and analyzed using standard methods. a total of 27 green algal species divided into 16 families were recorded. shannon diversity indices ranged from 1.75 to 2.39 in all ponds, dominance index from 0.14 to 0.23 and species evenness 0.56 to 0.64. Closterium sp. and Rhizoclonium hookeri kuetz. were positively associated with the concentration of Fe, however they were negatively correlated (sensitive) to alkalinity, total dissolved solids and electrical conductivity. Stichococcus bacillaris naegeli, Staurastrum rotula nordst. and Sphaeroplea sp. had significant positive relationship with biochemical oxygen demand (BOD), Mn, and Mo levels in the water. Pseudouvella americana (snow) Wille. and Scenedesmus quadricauda (turp.) de Bréb. showed a close positive association with alkalinity but were sensitive to Fe, Bod, Mn and Mo. the species reported here showed closed association with physicochemical factors in these ponds.key words -Chlorophyta, diversity, ecology, lenthic water bodies, trace metals RESUMO -(Interação de algas verdes com parâmetros físico-químicos em lagoas artificiais em Zaria, Norte da Nigéria). As espécies de algas verdes e sua associação com parâmetros físico-químicos em lagoas artificiais de Zaria, Nigéria foram estudados entre novembro de 2005 e agosto de 2006. As amostras de fitoplâncton e de água foram coletadas, preservadas e analisadas usando métodos padrões. Foram registradas um total de 27 espécies de algas verdes divididas em 16 famílias. os indices de diversidade de shannon variaram de 1,75 a 2,39 em todas as lagoas; índice de dominância de 0,14 a 0,23 e a eqüidade de espécies de 0,56 a 0,64. Closterium sp. e Rhizoclonium hookeri kuetz. foram associados positivamente com a concentração de Fe, porém eles foram correlacionados negativamente (sensíveis) à alcalinidade, condutividade elétrica e sólidos totais dissolvidos. as espécies Stichococcus bacillaris naegeli, Staurastrum rotula nordst. e Sphaeroplea sp. tiveram relação positiva e significativa com a demanda bioquímica de oxigênio, e com os níveis de Mn e Mo na água. Pseudouvella americana (snow) Wille. e Scenedesmus quadricauda (turp.) de Bréb. mostraram estreita associação positiva com a alcalinidade, mas foram sensíveis ao Fe, dBo, Mn e Mo. as espécies relatadas aqui apresentaram associação próxima com fatores físico-químicos nessas lagoas.

Toxicity of atrazine to Scenedesmus quadricauda under different nitrogen concentrations

“…The S. quadricauda ABU12 strain used in this study was isolated from the Department of Biological Sciences Fish Pond, Ahmadu Bello University Zaria, Nigeria (Chia et al 2011;Chia and Musa 2014). The microalga was cultured in a slightly modified OECD medium (pH 7.0;OECD 1984) under controlled laboratory conditions (continuous lighting, light intensity of 40 lmol m -2 s -1 and temperature of 23 ± 2°C).…”

“…For example, nitrogen content which determines the trophic status of aquatic ecosystems is known to vary spatially and temporally in aquatic ecosystems (Chia et al 2011;Sugimoto et al 2014). Most studies of nutrient influence on atrazine toxicity have been biased toward periphyton communities (Guasch et al 2007;Murdock et al 2013;Dalton et al 2015).…”

Appraising the Physico-chemical Characteristics and Heavy Metals in Pond Water at Quarry Site in Ngwogwo, Ebonyi State, Nigeria

“…Dark brown glass bottles (1 litre) were used to collect water samples for pH and dissolved oxygen, DO analyses. Polyethylene bottles were used for collection and storage of water samples for other chemical analyses (Chia et al, 2011). Each sampling bottles of one (1) liter by volume were preconditioned with 5% nitric acid and later rinsed thoroughly with distilled de-ionized water.…”

Algicidal effects of aqueous leaf extracts of neem (Azadirachta indica) on Scenedesmus quadricauda (Turp.) de Brébission

“…The microalga was isolated from a freshwater pond in Zaria, Nigeria (Chia et al 2011;Chia & Musa 2014; and maintained in OECD medium (OECD 1984 ) using cool white fluorescent lamps. The reagents used for culture medium preparation were of analytical grade, and were obtained from Sigma Aldrich (USA).…”