Results 131 to 140 of about 3,149,602 (290)

Sodium sulfite can reliably induce chemical hypoxia without toxic effects in the model sea anemone species, Exaiptasia diaphana

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract Climate change is accelerating the deoxygenation of aquatic ecosystems, so understanding its effects on biological processes is increasingly critical. An emerging method for inducing hypoxia during experimentation utilizes sodium sulfite (SSI) to scavenge oxygen; however, it remains unclear if hypoxia‐inducing concentrations of SSI are toxic ...
Zhen Qin   +3 more
wiley   +1 more source

Storage treatment and diluent cause inconsistencies in commonly used fluorometric microplate enzyme assays conducted with saltmarsh soils

open access: yesLimnology and Oceanography: Methods, EarlyView.
Abstract Fluorometric enzyme assays are a tool for determining potential enzyme activity in soils. A wide array of methodological approaches is adopted by different studies, making comparisons difficult. An important consideration is whether assay conditions replicate the environment of the samples or optimize potential enzyme activity.
Catrina Gore   +4 more
wiley   +1 more source

Blue-Green Algae and the Seasonal Succession of Daphnia

open access: yes, 2001
The cladoceran Daphnia lumholtzi invaded North America from the Old World tropics and has since spread across much of the southern United States. This exotic cladoceran is most common during midsummer, when native Daphnia are rare and Cyanobacteria (blue-
Pattinson, Kristen
core  

A potential cyanobacterial ancestor of Viridiplantae chloroplasts [PDF]

open access: yes, 2011
The theory envisaging the origin of plastids from endosymbiotic cyanobacteria is well-established but it is difficult to explain the evolution (spread) of plastids in phylogenetically diverse plant groups.
Sabyasachi Bhattacharya   +5 more
core  

Forecasting the impact of food‐provisioning and other stressors on a marine top‐predator population

open access: yesOikos, EarlyView.
Wildlife tourism can alter animal behavior, affect vital rates and diminish population viability but its impact in the context of other human‐ and environmental disturbances, remain largely unstudied. Using simulation models and leveraging a robust long‐term dataset spanning eight years, we evaluated the contribution of wildlife feeding, in the context
Valeria Senigaglia   +4 more
wiley   +1 more source

Resource competition between buoyancy‐regulating and sinking phytoplankton species along a stratified water column

open access: yesOikos, EarlyView.
In temperate lakes, plankton dynamics are closely linked to seasonal shifts in water stratification, following air temperature. The onset of summer stratification typically coincides with the formation of an algal spring bloom in the well‐mixed surface layer (epilimnion).
Arthur F. Rossignol, Sabine Wollrab
wiley   +1 more source

Influence of selected abiotic factors on the decomposition of chlorophylls

open access: yesOceanologia, 2001
The paper presents the results of experiments to determine the influence of selected physico-chemical factors - oxygen, visible light and temperature - on the decomposition of (1) chlorophylls a, b and c, chlorophyll a derivatives and beta-carotene in ...
Gra¿yna Kowalewska   +1 more
doaj  

Biosurfactant production by Pseudomonas aeruginosa isolated from mining waste: From genomic analysis to development of a polymeric composite for removal of hexavalent chromium

open access: yesPolymer International, EarlyView.
Biosurfactant was produced by Pseudomonas aeruginosa using andiroba waste from Amazonia. A biosurfactant–alginate composite (Alg/BioS) was successfully synthesized via ionotropic gelation, and achieved up to 70% Cr6+ removal from water. Abstract Environmental contamination by heavy metals represents a significant challenge due to their persistence in ...
Paulo Diniz Austriaco   +11 more
wiley   +1 more source

MOLECULAR CHARACTERIZATION OF A GREEN ALGAE ISOLATE BY 16S rRNA IN IMPROVEMENT OF CAROTENOID PRODUCTION [PDF]

open access: yes, 2009
Sintesis karotenoid alami belum pernah melebihi produk sintetik pada skala komersial. Kurangnya pemahaman mengenai aspek mikrobiologis dan ekofisiologis isolat penghasil karotenoid seringkali menyebabkan terjadinya kesalahan penamaan spesies.
Kusdiyantini, Endang   +2 more
core  

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