Balanced Aquatic Microcosms: Their Implications for Space Travel
نویسندگان
چکیده
منابع مشابه
Effects of pharmaceutical mixtures in aquatic microcosms.
Pharmaceuticals have a wide range of biological properties and are released into the environment in relatively large amounts, yet little information is available regarding their effects or potential ecological risks. We exposed outdoor aquatic microcosms to combinations of ibuprofen (a nonsteroidal anti-inflammatory drug), fluoxetine (a selective serotonin reuptake inhibitor), and ciprofloxacin...
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The effects of the parasiticide ivermectin were assessed in plankton-dominated indoor microcosms. Ivermectin was applied once at concentrations of 30, 100, 300, 1000, 3000, and 10,000 ng/l. The half-life (dissipation time 50%; DT₅₀) of ivermectin in the water phase ranged from 1.1 to 8.3 days. The lowest NOEC(community) that could be derived on an isolated sampling from the microcosm study by m...
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John C. Holz is an Assistant Professor at the University of Nebraska-Lincoln, where he received his M.S. and Ph.D. degrees in aquatic ecology. He has established an active lake water quality extension program that provides information on common Midwest management issues (e.g., algal control, aquatic weed management, nutrient management) to lake owners, users, and managers. His research interest...
متن کاملCreosote toxicity to photosynthesis and plant growth in aquatic microcosms.
To assess photosynthesis as a bioindicator of toxicity from polycyclic aromatic hydrocarbons (PAHs), the response of chlorophyll-a fluorescence to creosote exposure was compared with effects on population-level plant growth. Large, outdoor, freshwater microcosms containing Eurasian watermilfoil (Myriophyllum spicatum) received either a single application or multiple applications of liquid creos...
متن کاملNo evidence of aquatic priming effects in hyporheic zone microcosms
The priming effect refers to quantitative changes in microbial decomposition of recalcitrant organic matter upon addition of labile organic matter and is a phenomenon that mainly has been reported and debated in soil science. Recently, priming effects have been indicated in aquatic ecosystems and have received attention due to the potential significance for ecosystem carbon budgets. Headwater s...
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ژورنال
عنوان ژورنال: The American Biology Teacher
سال: 1963
ISSN: 0002-7685
DOI: 10.2307/4440414