Monday, November 18, 2013

Microbes losing themselves in Heat



Microbes losing themselves in Heat
In this article presented by Nydahl, it is shown how the coastal zone is the productive area of the marine environment. In the article it is shown how climate change, increased temperature and precipitation are expected to influence the coastal food web. This experiment used a dark bottle as an incubation to show the short – term interactive effects of changes in salinity, temperature and riverine dissolved organic matter.in this there was found to be more microbial respiration, growth and abundance in the estuarine community. In the research, it was shown that when there was an increase in temperature, there was a reduction in bacterial abundance. Essentially, the study showed that hypoxia had the probability to increase in coastal zones due to respiration enhancement that are brought on by higher temperatures.
Table 1. Experimental design, including the environmental factors and their levels
Treatment
rDOM (μM)
Salinity (g kg−1)
Temperature (°C)
1.                   The in situ temperature 12 °C, 300 μM DOC and 3 g kg−1 salinity represent current levels.
1
300
1
12
2
300
1
15
3
300
3
12
4
300
3
15
5
600
1
12
6
600
1
15
7
600
3
12
8
600
3
15
Sampling and preparation of the media and inoculum

Original Article: Nydahl A and Panigrahi S. (2013) Increased Microbial activity in a warmer and wetter climate enhances the risk of coastal hypoxia. ISME J 85: 338-347

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