光裸方格星虫增养殖对滩涂底质的影响

doi:10.11978/2017037

Abstract

Abstract:

To study the effects of culturing and proliferation of Sipunculus nudus on tidal flat sediment, we carried out an investigation in a culturing zone located in Suixi, Beibu Gulf, China in spring and autumn 2016. The organic matter content (OM), grain size and oxidation reduction potential (ORP) of the sediment were determined in the S group (Sipunculus nudus monoculture), P group (polyculture of S. nudus and Meretrix lyrata) and C group (blank zone without S. nudus). The OM and fine sand of the layer (20~30 cm) in the S group accumulated obviously, but only the surface layer (0~3 cm) in the C group had a similar tendency, which indicated that S. nudus can migrate down the surface sediment, and the migration depth was about 20~30 cm in the tidal flat. The ORP of the pore water in the C group had no significant decrease, and most of the layers in the S group had similar changing trends except that the layer of 10~20 cm decreased to some extent, which indicated that the culture of S. nudus in tidal flat will not result in significant deterioration of sediment. The OM and fine sand of the five layers in the P group increased significantly than those in the S and C groups, which indicated that the Meretrix lyrata had strong filter feeding and deposition ability, and the bioturbation of S. nudus can accelerate the migration of OM and fine sand. The ORP value of the two layers (0~3, 3~10 cm) in the P group decreased significantly than that in the S group (p<0.05), and the results indicated that the high density of Meretrix lyrata will result in significant deterioration of their habitat. S. nudus can migrate down and bury surface organic matter, and M. lyrata can promote the deposition of particulate matter; the complementary functions of the two animals help improve the nutrient utilization and carbon sequestration function of the tidal flat.

Key words: Sipunculus nudus Linnaeus, Meretrix lyrata, culturing, sediment

CLC Number:

P735.12

Junwei LI, Xiaoyong XIE, Yongjian GUO, Changbo ZHU, Suwen CHEN, Xian DING, Ting LI, Zhenguo CHEN. Influence of aquaculture of Sipunculus nudus on sediment[J].Journal of Tropical Oceanography, 2018, 37(1): 37-44.

Figures/Tables 9

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References 29

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粒径组成	处理组	0~3cm	3~10cm	10~20cm	20~30cm	30~40cm
d>0.85mm 沙粒占比/%	对照区	38.62±3.36	23.21±3.02	23.68±3.18	29.27±3.62	31.39±2.89
	沙虫区	23.26±1.69	25.03±2.33	26.93±3.26	33.23±2.59	34.29±3.65
	混养区	22.56±2.56	23.68±2.69	27.38±3.02	32.16±3.23	32.31±2.98
0.85mm>d>0.43mm 沙粒占比/%	对照区	20.32±3.02	26.58±2.21	29.59±2.37	30.79±4.03	32.92±2.61
	沙虫区	38.57±4.23	36.38±3.69	35.59±2.13	35.56±5.32	37.75±3.26
	混养区	36.52±4.31	35.61±4.10	34.13±3.41	36.57±4.67	37.66±4.09
0.43mm>d>0.18mm 沙粒占比/%	对照区	31.53±3.18	38.76±4.35	37.25±2.72	31.13±3.02	29.09±2.69
	沙虫区	29.39±3.04	32.69±3.52	30.52±2.61	24.31±3.68	21.94±2.23
	混养区	32.41±3.08	33.26±2.06	29.31±2.83	26.41±3.76	24.23±2.51
0.18mm>d>0.1mm 沙粒占比/%	对照区	7.63±1.02	9.36±1.69	8.12±1.15	6.31±0.96	4.91±1.35
	沙虫区	6.84±0.69	4.57±0.93	4.68±0.52	4.23±0.38	4.18±0.25
	混养区	5.92±0.81	4.23±0.62	4.92±0.12	4.13±0.64	4.68±0.58
d<0.1mm 沙粒占比/%	对照区	0.65±0.13	1.32±0.20	0.83±0.09	1.69±0.16	1.36±0.08
	沙虫区	0.63±0.05	0.52±0.08	0.65±0.11	0.68±0.14	0.85±0.20
	混养区	0.71±0.18	0.56±0.13	0.59±0.09	0.71±0.07	0.80±0.09

粒径组成	处理组	0~3cm	3~10cm	10~20cm	20~30cm	30~40cm
d>0.85mm 沙粒占比/%	对照区	44.88±6.37	17.37±3.21	22.90±2.36	32.59±4.09	33.21±2.67
	沙虫区	29.40±3.01	25.35±2.15	23.83±3.41	25.44±3.96	24.18±2.91
	混养区	28.29±4.64	17.66±1.82	16.26±2.13	28.35±3.64	27.62±3.04
0.85>d>0.43mm 沙粒占比/%	对照区	16.91±2.06	25.77±3.19	30.86±2.82	30.85±3.17	31.03±4.53
	沙虫区	30.75±4.13	33.28±2.27	34.45±4.61	33.11±2.98	33.12±4.91
	混养区	26.06±3.83	25.54±2.61	26.72±2.37	30.37±3.64	29.06±3.17
0.43>d>0.18mm 沙粒占比/%	对照区	29.49±4.13	44.11±5.26	37.80±4.01	28.37±3.28	27.21±3.94
	沙虫区	34.00±5.13	35.81±2.69	35.05±4.37	35.62±4.16	36.19±5.38
	混养区	34.69±2.16	41.87±5.64	41.94±4.28	33.08±3.01	34.59±4.53
0.18>d>0.1mm 沙粒占比/%	对照区	7.85±1.02	11.24±1.85	7.63±0.52	5.75±0.63	4.23±0.41
	沙虫区	5.36±0.68	5.12±0.81	6.07±1.03	5.15±0.59	5.26±0.67
	混养区	8.17±1.21	11.61±1.06	12.22±1.39	6.90±0.81	7.15±0.79
d<0.1mm 沙粒占比/%	对照区	0.87±0.19	1.50±0.08	0.81±0.05	2.45±0.27	1.67±0.31
	沙虫区	0.49±0.05	0.45±0.06	0.59±0.12	0.68±0.09	0.65±0.11
	混养区	2.79±0.31	3.33±0.26	2.86±0.32	1.29±0.17	1.35±0.25

组别	对照区	沙虫区	混养区
针杆藻Synedra sp.	85	102	17
粗针杆藻Synedra Robusta Ralfs	50	17	34
舟形藻Navicula sp.	170	85	34
双壁藻Diploneis sp.	-	-	17
卵形藻Cocconeis sp.	-	-	17
舟形藻斑点亚属Navicula Punctatae sp.	-	-	17
总数	305	204	136

Influence of aquaculture of Sipunculus nudus on sediment

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