Closed Ecological Systems

Possible nutrient limiting factor in long term operation of closed aquatic ecosystem

“…Moreover, soluble carbohydrate byproducts were found to be negatively correlated with TP and NO 3 AN. Metabolite interaction is considered one possible interaction between populations (Taub, 1974). Hansen et al (2008) also found that in P-and N-rich tests, poor elemental food quality reduces the toxicity of fluoxetine against D. magna, the metabolism needs further discussion.…”

“…Here we define a closed ecological system as one in which no materials such as oxygen and carbon dioxide are exchanged with the environment (Taub, 1974;Morowitz et al, 2005). The biogeophysical conditions of closed ecological system regulate and determine future biogeochemical circulations.…”

Agriculture for Space: People and Places Paving the Way

“…He even included a sketch of a greenhouse power requirements ranging from ~10 kW to 100 kW of electrical power for lighting, and 5 to 50 m 2 surface area to produce enough oxygen for one human (Miller and Ward;. Other algae and cyanobacteria were also studied, including Anacystis, Synechocystis, Scenedesmus, Synechococcus, and Spirulina (Miller and Ward, 1966;Taub, 1974). At the same time as these US studies were occurring, Russian researchers both in Krasnoyarsk, Siberia (Gitelson et al, 1975;1976) and in Moscow (Gazenko, 1967) were conducting human life support studies using algal bioreactors and plants to provide O 2 in closed habitats, and I will expand on this below.…”

Properties of an aquatic micro-ecosystem

“…The objective of building microsystems is to provide tools for (a) doing observations under less variable environmental circumstances, and (b) doing experiments to test hypotheses. Especially in aquatic ecology, microsystems have been built more or less successfully (see review by Taub, 1974, and discussion in Ringelberg & Kersting, in press). …”