Behavior of Simple Closed Ecological Systems; Lower Nutrient Concentrations Allow Longer Persistence of Grazer Populations DOI Creative Commons
Frieda B. Taub,

Kate M McGrath-Flinn,

Natalie E Stillwell

et al.

Life Sciences in Space Research, Journal Year: 2024, Volume and Issue: 44, P. 47 - 57

Published: Dec. 10, 2024

We expect to develop self-sustaining extraterrestrial colonies, and they will approach being closed ecological systems. Using simple ecosystems containing Daphnia magna, three species of algae, microbes, we tested multiple conditions study long-term organism survival, which is only possible with adequate nutrient recycling. Closed open systems behaved differently from one another at high nitrate concentrations; in systems, the animals were dead by day 14; populations persisted beyond 273 days. deaths associated increased pH O2 caused greater algal photosynthesis lack exchange atmosphere. Replicate variability that used small suggested inadequate grazing capability allowed algae create unfavorable survival. Over months, abundance decreased, presumably because recycling; these temporarily after addition nutrients. The natural lake organisms did not increase nutrient-recycling capabilities Understanding mechanisms be useful implementing biological processes managing life support

Language: Английский

Zebrafish Selection Strategy for the First Zebrafish Cultivation Experiment on the Chinese Space Station DOI

Chaoxian Jia,

Xianyuan Zhang,

Haoyuan Sun

et al.

Life Sciences in Space Research, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

Citations

0
Behavior of Simple Closed Ecological Systems; Lower Nutrient Concentrations Allow Longer Persistence of Grazer Populations DOI Creative Commons
Frieda B. Taub,

Kate M McGrath-Flinn,

Natalie E Stillwell

et al.

Life Sciences in Space Research, Journal Year: 2024, Volume and Issue: 44, P. 47 - 57

Published: Dec. 10, 2024

We expect to develop self-sustaining extraterrestrial colonies, and they will approach being closed ecological systems. Using simple ecosystems containing Daphnia magna, three species of algae, microbes, we tested multiple conditions study long-term organism survival, which is only possible with adequate nutrient recycling. Closed open systems behaved differently from one another at high nitrate concentrations; in systems, the animals were dead by day 14; populations persisted beyond 273 days. deaths associated increased pH O2 caused greater algal photosynthesis lack exchange atmosphere. Replicate variability that used small suggested inadequate grazing capability allowed algae create unfavorable survival. Over months, abundance decreased, presumably because recycling; these temporarily after addition nutrients. The natural lake organisms did not increase nutrient-recycling capabilities Understanding mechanisms be useful implementing biological processes managing life support

Language: Английский

Citations

0