三种常见原生动物对褐潮藻种抑食金球藻(Aureococcus anophagefferens)的摄食

doi:10.11978/2017130

Abstract

Abstract:

With the increase of marine plastic waste, marine microplastics have attracted more and more attention as a new type of marine pollution. At present, studies of the source, distribution and analytical approach of microplastics are well recognized. Most research focuses on plastic ingestion by marine organisms, and on the effects of microplastics adsorbing and releasing toxic chemicals. However, the role of microplastics as a vector for pelagic microorganism, phytoplankton and micozooplankton is poorly understood. In this review, we address three functions of microplastics as a biological vector. 1) Aggregation, it is easy for biofilms to form a microbial community on the surface of microplastics, which provide the means for horizontal transfer of organisms and genes, and may lead to the transformation or transduction of pathogenic gene, antibiotic resistance gene (ARGs), called genetic exchange. 2) Dispersal, the spread of harmful algal species, pathogenic bacteria and drug-resistant bacteria as well as other microorganisms may happen when the microplastics are freshly from the waste water flow, which potentially poses a risk of invasion when arriving in a new habitat with favorable condition. 3) A feeding enhancement concept, we propose this concept because a piece of microplastics is full of the attached biofilms, nutrients and organisms, which may attract large grazers or predators and can also improve their predation efficiency. As a result, these grazers/predators may seek pieces of microplastic as foods, which may cause more serious toxicological effects. The review focuses on the ecological effects of “microplastic + biology”.

Key words: brown tide, A. anophagefferens, protozoan, grazing, EPS

CLC Number:

Q178.53

Yao CHEN, Xilu YANG, Xuejia HE. Grazing of three common protozoan on brown tide alga Aureococcus anophagefferens[J].Journal of Tropical Oceanography, 2018, 37(6): 120-132.

Figures/Tables 10

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References 57

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饵料浓度 /(mg C·L^-1)	抑食金球藻细胞密度 /(×10⁵cells·mL^-1)	球等鞭金藻细胞密度 /(×10⁴cells·mL^-1)
0.2	1.38	2.16
0.3	2.07	3.24
0.5	3.44	5.40
1.0	6.88	10.8
1.5	10.3	16.2
3.0	20.6	32.4

实验	设置	摄食者	处理	饵料浓度/(mg C·L^-1)
单种饵料生长	1	海洋尖尾藻	100%抑食金球藻	0.2、0.3、0.5、1.0、1.5、3.0
		海洋尾丝虫
		扇形游仆虫
	2	海洋尖尾藻	100%球等鞭金藻	0.2、0.3、0.5、1.0、1.5、3.0
		海洋尾丝虫
		扇形游仆虫
单种饵料摄食	3	海洋尖尾藻	100%抑食金球藻	0.2、0.3、0.5、1.0、1.5、3.0
		海洋尾丝虫
		扇形游仆虫
	4	海洋尖尾藻	100%球等鞭金藻	0.2、0.3、0.5、1.0、1.5、3.0
		海洋尾丝虫
		扇形游仆虫
混合饵料选择性摄食	5	海洋尖尾藻	抑食金球藻(指数期)∶球等鞭金藻为 80∶20、50∶50、20∶80	1.5
		海洋尾丝虫
		扇形游仆虫
	6	海洋尖尾藻	抑食金球藻(稳定期)∶球等鞭金藻为 80∶20、50∶50、20∶80	1.5
		海洋尾丝虫
		扇形游仆虫

参数	摄食抑食金球藻			摄食球等鞭金藻
参数	海洋尖尾藻	海洋尾丝虫	扇形游仆虫	海洋尖尾藻	海洋尾丝虫	扇形游仆虫
μ_max/(d^-1)	0.63±0.11	0.48±0.06	0.57±0.07	0.55±0.03	0.48±0.02	0.72±0.02
K_GR/(mg C·L^-1)	0.38±0.26	0.50±0.25	0.20±0.18	0.08±0.05	0.17±0.05	0.06±0.02
r²	0.91	0.96	0.83	0.93	0.98	0.92
I_max/(ng C·grazer^-1·d^-1)	0.64±0.15	3.04±0.74	167.64±25.01	1.76±0.50	11.83±3.49	329.33±75.92
K_IR/(mg C·L^-1)	0.88±0.48	4.77±1.66	1.15±0.38	1.58±0.89	4.71±2.00	2.77±1.06
r²	0.86	0.99	0.95	0.89	0.98	0.96
GGE_max	65.8%±13.0%	35.2%±6.0%	49.1%±14.6%	43.3%±11.6%	34.8%±5.4%	76.5%±2.7%

摄食组	比例	饵料	抑食金球藻指数期					抑食金球藻稳定期
			FR	Ivlev's index	Jacob's index		摄食行为	FR	Ivlev's index	Jacob's index		摄食行为
			FR	Ivlev's index	lgQ	D	摄食行为	FR	Ivlev's index	lgQ	D	摄食行为
海洋尖尾藻	80∶20	抑食金球藻	1.136	0.064	0.396	0.427	+	0.997	-0.003	-0.007	-0.008	0
	80∶20	球等鞭金藻	0.456	-0.374	-0.396	-0.427	-	1.013	0.006	0.007	0.008	0
	50∶50	抑食金球藻	1.655	0.247	0.681	0.655	+	0.104	-0.812	-1.263	-0.896	-
	50∶50	球等鞭金藻	0.345	-0.487	-0.681	-0.655	-	1.896	0.309	1.263	0.896	+
	20∶80	抑食金球藻	2.935	0.492	0.755	0.701	+	0.917	-0.044	-0.047	-0.054	0
	20∶80	球等鞭金藻	0.516	-0.319	-0.755	-0.701	-	1.021	0.010	0.047	0.054	0
海洋尾丝虫	80∶20	抑食金球藻	1.061	0.030	0.148	0.169	+	0.916	-0.044	-0.164	-0.187	-
	80∶20	球等鞭金藻	0.755	-0.140	-0.148	-0.169	-	1.336	0.144	0.164	0.187	+
	50∶50	抑食金球藻	1.125	0.059	0.109	0.125	+	0.599	-0.251	-0.369	-0.401	-
	50∶50	球等鞭金藻	0.875	-0.066	-0.109	-0.125	-	1.401	0.167	0.369	0.401	+
	20∶80	抑食金球藻	2.964	0.495	0.765	0.707	+	0.198	-0.670	-0.783	-0.717	-
	20∶80	球等鞭金藻	0.509	-0.325	-0.765	-0.707	-	1.201	0.091	0.783	0.717	+
扇形游仆虫	80∶20	抑食金球藻	1.125	0.059	0.351	0.384	+	0.494	-0.338	-0.786	-0.719	-
	80∶20	球等鞭金藻	0.501	-0.332	-0.351	-0.384	-	3.023	0.503	0.786	0.719	+
	50∶50	抑食金球藻	1.201	0.092	0.177	0.201	+	0.889	-0.059	-0.097	-0.111	0
	50∶50	球等鞭金藻	0.799	-0.112	-0.177	-0.201	-	1.111	0.053	0.097	0.111	0
	20∶80	抑食金球藻	1.575	0.223	0.265	0.296	+	0.973	-0.014	-0.015	-0.017	0
	20∶80	球等鞭金藻	0.856	-0.077	-0.265	-0.296	-	1.007	0.003	0.015	0.017	0

Grazing of three common protozoan on brown tide alga Aureococcus anophagefferens

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