Philips AkinwoleDePauw University · Biology
Philips Akinwole
PhD
About
24
Publications
5,587
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254
Citations
Introduction
Impacts of UV- radiation treatment of secondary effluent from a municipal wastewater treatment plant on microbial and soil parameters
Additional affiliations
January 2011 - December 2013
Publications
Publications (24)
Bioplastics are considered sustainable alternatives to conventional microplastics which are recognized as a threat to terrestrial ecosystems. However, little is known about the potential ecotoxicological effects of bioplastics on soil fauna and ecosystems. The present study assessed the toxicity of microplastics [Polystyrene (PS), Polyethylene (PE)...
Urban rivers often contain elevated concentrations of contaminants such as organic pollutants and heavy metals which can be amplified in lotic ecosystems receiving effluents from wastewater treatment plants (WWTP). However, the impact of WWTPs on the microbial parameters of the urban river sediments has not been well documented compared to urban su...
Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban...
Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban...
Microorganisms in streams drive many biogeochemical reactions of global significance, including nutrient cycling and energy flow; yet, the mechanisms responsible for the distribution and composition of streambed microbial communities are not well known. We sampled sediments from multiple streams in two watersheds (Neversink River [New York] and Whi...
The effluents of wastewater treatment plants (WWTPs) represent a complex mixture of nutrients and toxic substances, thus, the potential exists for the effluents to significantly impact the biochemical characteristics and bacterial communities of the receiving water. We examined spatial and seasonal patterns, and the impact of effluents on microbial...
The effluents of wastewater treatment plants (WWTPs) represent a complex mixture of nutrients and toxic substances, thus, the potential exists for the effluents to significantly impact the biochemical characteristics and bacterial communities of the receiving water. We examined spatial and seasonal patterns, and the impact of effluents on microbial...
The spatial patterns of microbial communities are largely unknown compared to those of macro-fauna and flora. We investigated patterns of microbial community structure on streambed sediments from two watersheds across spatial scales spanning < 1m within a single stream to several hundred km between watersheds. Analyses of phospholipid fatty acids (...
Terrestrial dissolved organic matter (tDOM) is susceptible to microbiological and photolytic oxidations and contributes significantly to the energy flow in aquatic ecosystems. However, bacterial species actively utilizing this tDOM are still not determined. We here elucidated the microbial groups actively utilizing tDOM. We characterized sediment m...
The agricultural practices used today for farming produce crops generate major effects on microbial ecosystems. At the same time, soil microbes can stimulate a wide range of impacts on growing crops. Since changes in soil microbial communities may reflect changes in soil quality or differences in soil management practices, we examined the effects o...
Excessive organic matter input and nutrient loading are considered a major ongoing threat to water quality. Communal wastewater treatment is a process whereby sewage water is treated to remove contaminants before being discharged back to the environment. As most Wastewater Treatment Plants (WWTPs) do not remove all contaminants from sewage waters,...
Urban areas are functioning ecosystems with profound effects on the ecology and evolution of organisms. In fact, urban ecosystems with myriad deviations from natural systems provides potent evolutionary stimuli, however, the mechanisms through which urbanization drives natural selection on populations are poorly understood. To facilitate our unders...
Chytrid fungi are ubiquitous components of aquatic and terrestrial ecosystems yet they remain understudied. To investigate the use of phospholipid fatty acids as phenotypic characteristics in taxonomic studies and biomarkers for ecological studies, 18 chytrid fungi isolated from soil to freshwater samples were grown in defined media and their phosp...
Spatial scale is a critical consideration for understanding ecological patterns and controls of ecological processes, yet very little is known about how rates of fundamental ecosystem processes vary across spatial scales. We assessed litter decomposition in stream networks whose inherent hierarchical nature makes them a suitable model system to eva...
Feeding habits of members of two genera of macropyline oribatid mites ( Mesoplophora and Nothrus) and five genera of brachypyline mites ( Pergalumna, Scheloribates, Muliercula, Galumnella and Teleolides) from Nigeria were studied in laboratory experiments. Individuals extracted directly from the soil were observed in October 2002 for 287 days and M...
The vertical distribution, microenvironmental preference, canopy cover, as well as monthly fluctuations of recently described species of three genera of macropyline oribatid mites, Mesoplophora, Bicyrthermannia and Nothrus and three genera of brachypyline mites, Scheloribates, Muliercula and Galumnella were investigated over a 9-month period in sha...
Most studies of leaf decomposition in streams quantify decomposition rates in single riffles or short stream reaches and so we still know little about how decomposition varies at larger spatial scales. We used a leaf-bag approach and a hierarchical experimental design to investigate decomposition across three spatial scales spanning five orders of...
Questions
Question (1)
I have grown a bacterial isolate (using 0.5 Mcfarland standard) in an antibiotic microplate and took the optical density (OD) dynamically for 48h.
From the microplate reader, the OD for growth curves did not all start from zero (varied widely) and some growth curves susceptible to antibiotics were above growth control (GC-growth without antibiotics), though flat. Is there a particular growth equation or normalization for OD data (apart from natural log)? In summary, blank-corrected OD data not starting from zero or growths susceptible to antibiotics were above GC, see image below.
Any help will be appreciated.
Thank you.
Philips