Metabolic Diversity of Microbial Communities in the Lower Reaches of the Yangtze River and the Influencing Factors

doi:10.11924/j.issn.1000-6850.casb2020-0212

Abstract

Abstract:

The purpose is to analyze the metabolic diversity of microbial community and the impact of environmental factors on it, so as to provide reference for the improvement and restoration of ecological environment in the lower reaches of the Yangtze River. Biolog-ECO technology was used to analyze the microbial metabolic diversity in the lower reaches of the Yangtze River, and to explore the relationship between the changes of physical and chemical factors of water quality and the metabolic diversity of microbial communities. The results showed that except TP and TN, other water quality indexes in the lower reaches of the Yangtze River met the above class II standards; the overall metabolic capacity of the microbial community in Anqing and Nanjing river sections was relatively strong; the richness index of microbial community was the highest in Nanjing river section; the sequence of diversity index and evenness index from high to low was Anqing river section, Nanjing river section, Jingjiang river section, Tongling river section and Wuhu river section. The results of RDA analysis showed that TP and Pb were positively correlated with the six major carbon sources. Based on the analysis of water quality index and microbial metabolic diversity, the eutrophication degree of Anqing and Nanjing river section is relatively high, and TP and Pb can promote the metabolic diversity of microbial communities in the lower reaches of the Yangtze River.

Key words: Biolog-ECO technology, environmental factors, microbial community, metabolic diversity

CLC Number:

S931.3

Dong Xinxu, Fan Limin, Qiu Liping, Li Dandan, Dong Yuanyuan, Guo Nannan, Liu Xiangli, Qin Lu, Deng Ru, Chen Jiazhang. Metabolic Diversity of Microbial Communities in the Lower Reaches of the Yangtze River and the Influencing Factors[J]. Chinese Agricultural Science Bulletin, 2020, 36(33): 58-65.

Figures/Tables 6

References 30

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组别	AQ	TL	WH	NJ	JJ
DO/(mg/L)	7.2267±0.0717^b	7.4933±0.0285^a	7.6767±0.1244^a	7.5333±0.0433^a	7.6667±0.0318^a
COD/(mg/L)	2.1362±0.1402	1.8758±0.0401	2.0861±0.2011	2.0360±0.1877	1.8958±0.0856
TN/(mg/L)	1.3309±0.0372^b	1.6745±0.0548^a	1.6901±0.0428^a	1.7064±0.0138^a	1.4504±0.0209^b
TP/(mg/L)	0.2493±0.0045^a	0.1613±0.0181^b	0.1388±0.0195^b	0.1613±0.0098^b	0.1365±0.0060^b
ammonia/(mg/L)	0.0574±0.0119	0.0520±0.0210	0.0465±0.0048	0.0520±0.0079	0.0501±0.0032
As/(μg/L)	2.4540±0.0101^ab	2.4148±0.0449^b	2.2487±0.0146^c	2.5250±0.0178^a	2.4052±0.0347^b
Cu/(μg/L)	7.6809±0.1175	7.8216±0.1362	8.0935±0.1976	7.7184±0.0733	8.3186±0.5256
Pb/(μg/L)	0.0243±0.0023^a	0.0259±0.0015^a	0.0224±0.0017^a	0.0246±0.0018^a	0.0152±0.0022^b
非离子氨/(mg/L)	0.0049±0.0010	0.0044±0.0018	0.0040±0.0004	0.0044±0.0007	0.0043±0.0003

组别	AQ	TL	WH	NJ	JJ
DO/(mg/L)	7.2267±0.0717^b	7.4933±0.0285^a	7.6767±0.1244^a	7.5333±0.0433^a	7.6667±0.0318^a
COD/(mg/L)	2.1362±0.1402	1.8758±0.0401	2.0861±0.2011	2.0360±0.1877	1.8958±0.0856
TN/(mg/L)	1.3309±0.0372^b	1.6745±0.0548^a	1.6901±0.0428^a	1.7064±0.0138^a	1.4504±0.0209^b
TP/(mg/L)	0.2493±0.0045^a	0.1613±0.0181^b	0.1388±0.0195^b	0.1613±0.0098^b	0.1365±0.0060^b
ammonia/(mg/L)	0.0574±0.0119	0.0520±0.0210	0.0465±0.0048	0.0520±0.0079	0.0501±0.0032
As/(μg/L)	2.4540±0.0101^ab	2.4148±0.0449^b	2.2487±0.0146^c	2.5250±0.0178^a	2.4052±0.0347^b
Cu/(μg/L)	7.6809±0.1175	7.8216±0.1362	8.0935±0.1976	7.7184±0.0733	8.3186±0.5256
Pb/(μg/L)	0.0243±0.0023^a	0.0259±0.0015^a	0.0224±0.0017^a	0.0246±0.0018^a	0.0152±0.0022^b
非离子氨/(mg/L)	0.0049±0.0010	0.0044±0.0018	0.0040±0.0004	0.0044±0.0007	0.0043±0.0003

组别	Shannon指数	Simpson指数	Mclntosh指数	Richness指数
AQ	3.0220±0.0119	0.9457±0.0012	4.13±0.41	18.00±1.00^a
TL	2.8907±0.0409	0.9333±0.0039	2.82±0.24	14.00±1.00^b
WH	2.8752±0.0859	0.9323±0.0073	3.10±0.68	13.00±1.00^c
NJ	3.0031±0.0640	0.9439±0.0037	3.95±0.20	18.67±1.21^a
JJ	2.9315±0.0492	0.939±0.0032	3.87±0.39	16.00±0.00^abc

组别	Shannon指数	Simpson指数	Mclntosh指数	Richness指数
AQ	3.0220±0.0119	0.9457±0.0012	4.13±0.41	18.00±1.00^a
TL	2.8907±0.0409	0.9333±0.0039	2.82±0.24	14.00±1.00^b
WH	2.8752±0.0859	0.9323±0.0073	3.10±0.68	13.00±1.00^c
NJ	3.0031±0.0640	0.9439±0.0037	3.95±0.20	18.67±1.21^a
JJ	2.9315±0.0492	0.939±0.0032	3.87±0.39	16.00±0.00^abc