福建东山湾表层沉积物中甲藻孢囊分布研究

doi:10.11978/2022002

Abstract

Abstract:

Surface sediments were collected on the Dongshan Bay of Fujian Province China in November 2016. Dinoflagellate cysts were analyzed in the sediments with a particular focus on the distribution of toxic and harmful dinoflagellate cysts. The contents of biogenic elements were examined to reveal the relationships between cysts and biogenic elements. A total of 22 cyst taxa were identified, including 14 autotrophic and 8 heterotrophic taxa. Cysts of Protoperidinium dominated in the sediments. Shannon-Wiener diversity index (H') ranged from 1.70 to 2.38, and Pielou’s evenness index (J) ranged between 0.64 and 0.84. Cyst concentrations ranged from 70.6 to 136.4 cysts·g^-1, with an average of 107.2 cysts·g^-1. Cyst concentrations were lower in the Zhangjiang estuary and Bachimen area. The high percentages of cysts of heterotrophic dinoflagellates (averagely 75.5%) suggested the high primary productivity and eutrophication level on the Dongshan Bay. Notably, cysts of seven toxic and/or harmful algal bloom (HAB) species were identified in this study, including cysts of the paralytic shellfish toxin (PSP) producers Alexandrium ostenfeldii and A. catenella/tamarense, the yessotoxin (YTX) producers Gonyaulax spinifera, the potential azaspiracid (AZP) producer Azadinium sp., the ichthyotoxic species Polykrikos hartmannii, and the bloom species Barrufeta bravensis and Scrippsiella acuminata. Cysts of the HAB species generally occurred in small numbers, however, high numbers of cysts of G. spinifera in some stations need to be concerned.

Key words: Dinoflagellate cysts, Dongshan Bay, sediments, biogenic elements, harmful algal bloom

CLC Number:

P735.53

WANG Zhaohui, ZHANG Yuning, WANG Wenting, XIE Changliang, CHEN Jiazhuo, ZHENG Hu, WANG Junxing. Distribution of dinoflagellate cysts in surface sediments on the Dongshan Bay, Fujian province, China[J].Journal of Tropical Oceanography, 2022, 41(4): 154-162.

Figures/Tables 6

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References 39

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目	学名	中文名	有毒有害性	DS1	DS2	DS3	DS4	DS5	DS6	DS7	DS8	DS9
膝沟藻目 Gonyaulacales	Alexandrium catenella/tamarense	链状/塔玛亚历山大藻	PSP		+	+
	Alexandrium ostenfeldii	奥氏亚历山大藻	PSP	+			+
	Gonyaulax elongata	长膝沟藻		+	+	+	+		+	+	+	+
	Gonyaulax spinifera	具刺膝沟藻	YTX	+			+	+	+	+	+	+
	Gonyaulax whaseongensis	膝沟藻		+		+	+	+	+	+	+	+
	Sourniaea diacantha			+		+	+	+	+		+	+
Thoracosphaerales	Scrippsiella acuminata	锥状斯氏藻	HAB	+				+	+		+	+
Thoracosphaerales	Scrippsiella crystallina	水晶斯氏藻		+	+	+		+	+	+		+
Suessiales	Biecheleria tirezensis	别什藻		+	+	+	+	+	+	+	+	+
裸甲藻目 Gymnodiniales	Barrufeta bravensis		赤潮藻	+	+		+		+		+	+
	Gymnodinium plasticum	裸甲藻		+	+		+	+		+	+
	Polykrikos hartmannii	哈曼褐多沟藻	鱼毒素	+	+				+		+
	Polykrikos schwartzii	无纹多沟藻		+	+	+			+
多甲藻目 Peridiniales	Heterocapsa niei	异囊藻		+	+		+	+		+		+
	Protoperidinium abei	阿氏原多甲藻		+	+	+		+	+	+	+	+
	Protoperidinium claudicans	窄角原多甲藻						+
	Protoeridinium conicum	锥型原多甲藻				+		+	+	+
	Protoperidinium denticulatum	锯齿原多甲藻		+	+	+	+	+	+	+	+	+
	Protoperidinium leonis	里昂原多甲藻		+	+	+	+	+	+	+	+	+
	Protoperidinium minimum	微小原多甲藻			+		+	+			+
	Protoperidinium pentagonum	五角原多甲藻			+	+	+	+	+	+	+	+
未确定目 Dinophyceae incertae sedis	Azadinium sp.	环胺藻	潜在AZP	+		+		+			+	+
孢囊种类数				17	14	13	13	16	15	12	15	14

	TN	TP	BSi	TOC	孢囊种类	孢囊密度	膝沟藻密度	裸甲藻密度	多甲藻密度	Thor	Sues	环胺藻
TN	1	0.961**	-0.302	0.856**	-0.334	-0.593	-0.415	-0.133	-0.335	0.236	-0.17	-0.614
TP	0.961**	1	-0.428	0.896**	-0.347	-0.559	-0.504	-0.187	-0.226	0.162	-0.306	-0.53
BSi	-0.302	-0.428	1	-0.503	0.161	0.119	0.443	0.473	-0.28	0.159	0.385	-0.182
TOC	0.856**	0.896**	-0.503	1	-0.05	-0.336	-0.312	0.086	-0.24	0.393	0.023	-0.451
孢囊种类	-0.334	-0.347	0.161	-0.05	1	0.771*	0.768*	0.796*	0.04	0.333	0.595	0.384
孢囊密度	-0.593	-0.559	0.119	-0.336	0.771*	1	0.48	0.406	0.603	-0.109	0.24	0.426
膝沟藻密度	-0.415	-0.504	0.443	-0.312	0.768*	0.48	1	0.822**	-0.362	0.253	0.619	0.518
裸甲藻密度	-0.133	-0.187	0.473	0.086	0.796*	0.406	0.822**	1	-0.44	0.583	0.764*	0.137
多甲藻密度	-0.335	-0.226	-0.28	-0.24	0.04	0.603	-0.362	-0.44	1	-0.572	-0.427	0.107
Thor	0.236	0.162	0.159	0.393	0.333	-0.109	0.253	0.583	-0.572	1	0.551	-0.139
Sues	-0.17	-0.306	0.385	0.023	0.595	0.24	0.619	0.764*	-0.427	0.551	1	-0.142
环胺藻	-0.614	-0.53	-0.182	-0.451	0.384	0.426	0.518	0.137	0.107	-0.139	-0.142	1

Distribution of dinoflagellate cysts in surface sediments on the Dongshan Bay, Fujian province, China

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