Abstract：
:Seasonal shifts of dissolved inorganic nitrogen (DIN) and the dynamics of microbial communities for nitrogen transformation were investigated in the water column of Chesapeake Bay. The relative abundance of nitrogen over phosphorus (N) showed a strong seasonal and spatial pattern: gradually decreased from upstream to downstream; high in winter and low in summer. Because the phosphorus concentration remained relatively stable, the spatiotemporal pattern of N implied that a substantial fraction of DIN was removed in the bay, especially in summer. Correlation analyses indicated the functional microbial communities and environmental variables, such as temperature, dissolved oxygen, salinity, played important roles for connecting the seasonal variation of N. Among them, temperature was the trigger factor. High temperature in the summer induced the growth of functional microbes, which subsequently consumed a large portion of DIN inputted from the tributaries and reduced the N. The current study provided the relative importance of microbial communities and environmental variables in driving the DIN loss in the bay.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
Hong Y,Xu X,Kan J,Chen Fdoi
10.1007/s00253-013-5337-4subject
Has Abstractpub_date
2014-04-01 00:00:00pages
3219-29issue
7eissn
0175-7598issn
1432-0614journal_volume
98pub_type
杂志文章abstract：:Poly(ɛ-L-lysine) (ɛ-PL) is an unusual biopolymer composed of L-lysine connected between α-carboxyl and ɛ-amino groups. It has been used as a preservative in food and cosmetics industries, drug carrier in medicines, and gene carrier in gene therapy. Modern biotechnology has significantly improved the synthetic efficien...
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