广西涠洲岛大型海藻场及其邻近海域桡足类群落结构演替特征

doi:10.11978/2022219

Abstract

Abstract:

A survey of copepods and their resting eggs in the seaweed bed and its adjacent waters in the Weizhou Island, Guangxi Province was conducted in July and November 2021, and January and April 2022. A total of 43 species of copepods were identified in the water bodies, with an average abundance of 105±22ind·m^-3, and the dominant species were Temora urbinate, Cantocalanus papper, Pavocalanus crassirostris and other Calanidae; 10 species of copepods attached to the seaweed were identified, with an average abundance of (1.17±0.16)×10⁵ind·m^-3, and the dominant species were Euterpina acutifrons, Clytemnestra scutellata, Microsetella norvegica and other Harpacticoida. The abundance of epiphytic copepods was much higher than that in the water bodies (P<0.01). The average abundance, potential recruitment and hatching rate of resting eggs was (171±55)×10⁴ind·m^-3, (109±40)×10⁴ind·m^-3and 64%±6%, respectively. During the growth period of Sargassum (April), the abundance of resting eggs, the potential recruitment and the hatching rate were significantly higher than those in other seasons (P<0.05). Results show that the copepods in the seaweed bed of the Weizhou Island had high evenness index (0.88) and species diversity (2.66). The analysis of random forest model and correlation network showed that the dominant species (Canthocalanus pauper) were closely related to other species and are of great importance. The growth of Sargassum promotes the hatching of resting eggs and increases the abundance of copepods in the water body. The abundance of epiphytic copepods increases with the increase of the copepod abundance in the water body. Results show that the growth and decomposition of Sargassum are important drivers of the succession of copepod community structure in the seaweed ecosystem.

Key words: Weizhou Island, Sargassum, copepod, resting egg

GUO Jianlin, SUN Xian, YANG Yufeng, WANG Qing. The succession characteristics of copepod community structure in the seaweed bed and its adjacent waters in the Weizhou Island, Guangxi Province[J].Journal of Tropical Oceanography, 2023, 42(4): 155-165.

Figures/Tables 11

Fig. 1

Fig. 2

Tab. 1

Dominant species and dominance of copepods in water and attached to seaweed Sargassum"

种类		优势度						图8 备注
种类		春季	夏季	秋季	冬季	春季藻体附着	夏季藻体附着	图8 备注
红纺缍水蚤	Acartia erythraea	0.04	/	0.08	/	/	/	sp1
丹氏纺缍水蚤	Acartia danae	0.02	/	/	/	/	/	sp2
太平洋纺锤水蚤	Acartia pacifica	/	/	/	0.05	/	/	sp26
驼背隆哲水蚤	Acrocalanus gibber	/	0.03	0.04	/	/	/	sp17
微驼背隆哲水蚤	Acrocalanus gracilis	0.02	/	/	/	/	/	sp18
小纺缍水蚤	Acartia negligens	/	/	/	0.04	/	/	sp29
矮隆哲水蚤	Bestiolina amoyensis	0.02	0.10	/	0.03	/	/	sp31
中华哲水蚤	Calanus sinicus	0.07	/	0.10	0.14	/	0.04	sp7
微刺哲水蚤	Canthocalanus pauper	0.12	0.06	0.26	0.13	0.02	/	sp15
奥氏胸刺水蚤	Centropages orsinii	0.02	/	/	/	/	/	sp25
瘦尾胸刺水蚤	Centropages tenuiremis	/	0.26	/	0.04	/	0.21	sp24
椭形长足水蚤	Calanopia elliptica	0.06	/	0.18	0.36	/	/	sp30
硬磷暴猛水蚤	Clytemnestra scutellata	/	/	/	/	0.13	0.15	sp6
尖额谐猛水蚤	Euterpina acutifrons	0.02	0.29	0.10	/	0.30	0.38	sp5
亚强真哲水蚤	Eucalanus subcrassus	/	0.04	/	/	/	/	sp12
精致真刺水蚤	Euchaeta concinna	/	0.03	0.15	0.24	0.02	/	sp32
小毛猛水蚤	Microsetella norvegica	0.02	0.05	0.05	/	0.13	0.04	sp4
丽隆剑水蚤	Oncaea venusta	0.05	0.05	/	/	/	/	sp37
拟长腹剑水蚤	Oithona similis	0.06	0.27	/	/	/	/	sp38
坚长腹剑水蚤	Oithona rigida	/	/	/	/	0.02	/	sp39
等刺隆剑水蚤	Oncaea mediterranea	0.02	0.10	/	0.05	/	/	sp36
强额拟哲水蚤	Pavocalanuscrassirostris	0.05	0.07	0.04	0.04	/	/	sp16
小拟哲水蚤	Paracalanus parvus	/	0.03	0.08	/	/	/	sp11
瘦拟哲水蚤	Paracalanus gracilis	/	0.05	0.07	0.18	/	/	sp34
黑点叶剑水蚤	Sapphirina nigromaculata	0.05	/	/	/	/	/	sp33
瘦歪水蚤	Tortanus gracilis	/	/	0.07	/	/	/	sp27
异尾宽水蚤	Temora discaudata	0.06	/	0.10	/	/	/	sp23
锥形宽水蚤	Temora turbinata	0.08	0.17	0.12	0.12	0.10	/	sp22
普通波水蚤	Undinula vulgaris	0.07	/	0.04	0.05	/	/	sp21

Tab. 1

Fig. 3

Fig. 4

Tab. 2

Fig. 5

Fig. 6

Tab. 3

Fig. 7

Fig. 8

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站位		NK1	NK2	NK3	NK4	NG1	NG2	NG3	NG4
春季	J	0.88	0.79	0.85	0.82	0.86	0.86	0.83	0.87
春季	H'	2.50	2.23	2.24	2.22	2.50	2.14	2.36	2.56
夏季	J	0.86	0.88	0.86	0.88	0.85	0.89	0.87	0.89
夏季	H'	2.69	2.71	2.65	2.60	2.60	2.71	2.60	2.85
秋季	J	0.94	0.92	0.90	0.93	0.90	0.91	0.91	0.91
秋季	H'	2.82	2.81	2.75	2.79	2.61	2.63	2.74	2.72
冬季	J	0.90	0.90	0.87	0.87	0.87	0.87	0.88	0.92
冬季	H'	2.81	2.78	2.51	2.61	2.74	2.57	2.76	2.65

	藻体附着桡足类丰度	水体桡足类丰度	潜在补充量	休眠卵丰度	萌发率
藻体附着桡足类丰度	1
水体桡足类丰度	0.765*	1
潜在补充量	-0.588	-0.824*	1
休眠卵丰度	-0.6	-0.779	0.993**	1
萌发率	-0.416	-0.870*	0.841*	0.771	1

The succession characteristics of copepod community structure in the seaweed bed and its adjacent waters in the Weizhou Island, Guangxi Province

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