The structure of macrobenthic community in Pearl River Estuary

doi:10.17520/biods.2018321

Abstract

Abstract:

The macrobenthic communities of estuaries are often indicative of important community traits, such as the environmental pollution a community may experience. To better understand the structure of Pearl River Estuary’s macrobenthic community, macrobenthic species were identified based on investigations carried out from November 2014 to August 2015, and biodiversity analyses were performed. More specifically, biodiversity index calculations, cluster analysis, and nMDS (non-metric MDS) analysis were performed used PRIMER 6.0 software. While 52 macrobenthic species were identified in the Pearl River estuary, the dominant species in this study area were Potamocorbula laevis, Glaucomya chinensis, Potamocorbula ustulata and Dendroneris pinnaticirrus. The annual mean density of macrobenthos in the Pearl River Estuary was 269.3 ind./m ² and the annual mean biomass was 129.61 g/m ². The mean values of richness index (D), evenness index (J') and Shannon-Wiener diversity index (H') of 12 samplings were 1.81 ± 1.38、0.50 ± 0.27 and 1.60 ± 1.13, respectively. The results showed a range of environmental quality from clean to severe pollution, in which only P01 section indicated clean environmental quality in autumn and winter. Cluster and nMDS results revealed that low community similarity were observed among P01 section and P02 together with P03 sections, potentially due to the geographical distribution factors. Additionally, the P02 section and P03 section gathered crosswise with higher community similarity. Our results suggested the combination of environmental factors with physical and chemical sediment factors were significantly correlated with the distribution characteristics of communities. Also to note, water salinity and pH can help explain the biodiversity distribution pattern of the microbenthic community in the Pearl River Estuary.

Key words: Pearl River Estuary, macrobenthos, community structure

Xiping Zhou, Zhen Li, Peifang Wu, Xi Wu, Yixin Chen, Kangge Liu, Dongyan Liu, Yujue Wang, Yueqi Wang. The structure of macrobenthic community in Pearl River Estuary[J]. Biodiv Sci, 2019, 27(10): 1112-1121.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2018321

https://www.biodiversity-science.net/EN/Y2019/V27/I10/1112

Figures/Tables 10

References 28

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	P01			P02			P03
	高潮区 High tide	中潮区 Middle tide	低潮区 Low tide	高潮区 High tide	中潮区 Middle tide	低潮区 Low tide	高潮区 High tide	中潮区 Middle tide	低潮区 Low tide
粘土 Clay (%)	2.15	2.79	4.01	1.27	4.85	8.61	1.26	4.25	0.28
粉砂 Silt (%)	18.06	21.65	28.47	15.51	50.95	76.36	18.73	48.59	3.13
极细砂 Sand (%)	79.79	75.56	67.52	83.22	44.20	15.03	80.01	47.16	96.59
总氮 TN (%)	0.23	0.04	–	0.02	0.03	–	0.05	0.05	–
总有机碳 TOC (%)	1.83	0.37	–	0.22	0.21	–	0.60	0.70	–
温度 Temperature (℃)	24.23			24.50			23.87
盐度 Salinity (‰)	10.13			10.43			9.47
pH值	8.07			7.71			7.78

	P01			P02			P03
	高潮区 High tide	中潮区 Middle tide	低潮区 Low tide	高潮区 High tide	中潮区 Middle tide	低潮区 Low tide	高潮区 High tide	中潮区 Middle tide	低潮区 Low tide
粘土 Clay (%)	2.15	2.79	4.01	1.27	4.85	8.61	1.26	4.25	0.28
粉砂 Silt (%)	18.06	21.65	28.47	15.51	50.95	76.36	18.73	48.59	3.13
极细砂 Sand (%)	79.79	75.56	67.52	83.22	44.20	15.03	80.01	47.16	96.59
总氮 TN (%)	0.23	0.04	–	0.02	0.03	–	0.05	0.05	–
总有机碳 TOC (%)	1.83	0.37	–	0.22	0.21	–	0.60	0.70	–
温度 Temperature (℃)	24.23			24.50			23.87
盐度 Salinity (‰)	10.13			10.43			9.47
pH值	8.07			7.71			7.78

种类 Species	春季 Spring	夏季 Summer	秋季 Autumn	冬季 Winter
环节动物 Annelida
羽须鳃沙蚕 Dendroneris pinnaticirrus	-	-	-	0.022
软体动物 Mollusca
光滑河篮蛤 Potamocorbula laevis	0.512	0.143	0.326	0.603
中国绿螂 Glaucomya chinensis	0.067	0.128	0.020	0.031
焦河篮蛤 Potamocorbula ustulata	-	-	-	0.020

种类 Species	春季 Spring	夏季 Summer	秋季 Autumn	冬季 Winter
环节动物 Annelida
羽须鳃沙蚕 Dendroneris pinnaticirrus	-	-	-	0.022
软体动物 Mollusca
光滑河篮蛤 Potamocorbula laevis	0.512	0.143	0.326	0.603
中国绿螂 Glaucomya chinensis	0.067	0.128	0.020	0.031
焦河篮蛤 Potamocorbula ustulata	-	-	-	0.020

站次 Samplings	物种数 Species number	密度 Density (ind./m²)	生物量 Biomass (g/m²)	丰富度指数 Richness index (D)	均匀度指数 Evenness index (J')	Shannon-Wiener多样性指数 Shannon-Wiener diversity index (H')
P01
秋季 Autumn	19	183.1	89.47	3.92	0.80	3.39
冬季 Winter	14	113.8	45.69	3.18	0.81	3.09
春季 Spring	17	193.8	78.05	3.41	0.64	2.60
夏季 Summer	10	188.4	79.04	1.95	0.62	2.06
P02
秋季 Autumn	19	515.6	236.83	3.17	0.31	1.30
冬季 Winter	4	190.2	53.15	0.64	0.21	0.42
春季 Spring	4	391.1	100.12	0.56	0.54	1.08
夏季 Summer	4	236.4	63.18	0.61	0.51	1.02
P03
秋季 Autumn	7	446.2	222.87	0.92	0.40	1.03
冬季 Winter	4	469.3	323.93	0.54	0.22	0.45
春季 Spring	2	279.1	254.66	0.20	0.06	0.06
夏季 Summer	8	24.9	8.27	2.65	0.90	2.69
平均值 ± 标准差 Mean ± SD	9.3 ± 6.3	269.3 ± 153.1	129.61 ± 101.49	1.81 ± 1.38	0.50 ± 0.27	1.60 ± 1.13