Tracking of spatial changes in the structure of the zooplankton community according to multiple abiotic factors along a hypersaline lagoon

Rosa, Judson da Cruz Lopes da; Batista, Lucas Lemos; Monteiro-Ribas, Wanda Maria

doi:10.1590/2358-2936e2020012

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Original Article • Nauplius 28 • 2020 • https://doi.org/10.1590/2358-2936e2020012 copy

Tracking of spatial changes in the structure of the zooplankton community according to multiple abiotic factors along a hypersaline lagoon

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

In this study we evaluated the effects of changes in salinity, temperature, pH and dissolved oxygen on the spatiotemporal variation of zooplankton. Samples were collected in January−March, May; October−December 2010; and January−March 2011 in the Araruama lagoon, state of Rio de Janeiro, Brazil. There were eight fixed stations sampled using a WP2 net equipped with a flow meter. The zooplankton diversity of the Araruama lagoon was low and dominated by Cirripedia larvae and by the copepod Acartia tonsa, which is an indicator species of eutrophication. In general, a few species from the Cabo Frio region were able to adapt to the conditions of this hypersaline lagoon. In addition, a specimen of Monstrilla bahiana (Monstrilloidae) was found at a salinity of 46‰. This is the first record of the order Monstrilloida in the region of Cabo Frio. Temperature, salinity and pH were shown to be limiting factors for the species present in the lagoon since Cirripedia seemed to avoid releasing their larvae under unfavorable environmental conditions. The abundance of A. tonsa was always associated with that of Cirripedia larvae, and it was higher at cooler temperatures.

Keywords:
Acartia tonsa; Araruama lagoon; bioindicator species; temperature

Months	Temperature	Salinity	pH
Jan/2010	²= -0.83; p=0.00	R²= 0.19; p=0.26	R²= -0.60; p=0.02
Feb/2010	R²=-0.14; p=0.36	R²= -0.55; p=0.03	R²= -0.48; p=0.05
Mar/2010	R²= -0.12; p= 0.39	R²= 0.41; p=0.08	R²= -0.08; p=0.48
May/2010	R²= -0.72; p= 0.00	R²= 0.77; p=0.03	R²= 0.53; p=0.03
Oct/2010	R²= 0.10; p= 0.42	R²= 0.61; p=0.02	R²= 0.07; p= 0.51
Nov/2010	-	R²= 0.01; p=0.76	R²= 0.07; p= 0.49
Dec/2010	R²= 0.10; p= 0.42	R²= 0.00; p=0.82	R²= 0.02; p=0.42
Jan/2011	-	R²= 0.16; p=0.31	R²= 0.05; p= 0.57
Feb/2011	-	R²= 0.02; p=0.70	R²= 0.03; p=0.66
Mar/2011	R²= -0.71; p=0.03	R²= 0.11; p=0.40	R²= 0.01; p=0.78

Months	Temperature	Salinity	pH
Jan/2010	R²=-0.10; p=0.43	R²=-0.02; p=0.69	R²=-0.05; p=0.58
Feb/2010	R²=0.00; p=0.90	R²= 0.06; p=0.54	R²= 0.00; p=0.86
Mar/2010	R²=0.06 ; p=0.54	R²= 0.04; p=0.59	R²=0.25; p=0.19
May/2010	R²=-0.26; p=0.19	R²= 0.21; p=0.25	R²= -0.21; p=0.24
Oct/2010	R²=0.34 ; p=0.12	R²= 0.20; p=0.25	R²=0.05; p=0.58
Nov/2010	–	R²= 0.00; p=0.89	R²=0,00; p= 0.77
Dec/2010	R²=0.01; p= 0,80	R²= 0.15; p=0.34	R²= 0.00; p=0.82
Jan/2011	–	R²=0.12; p=0.39	R²=-0.01 ; p= 0.74
Feb/2011	–	R²= 0.21; p=0.24	R²=0.06; p=0.53
Mar/2011	R²=0.39; p=-.009	R²=0.13; p=0.36	R²= 0.06; p=0.54

Abiotic data	Cirripedia	Acartia tonsa
Temperature	R²= -0.22; p=0.28	R²= -0.68; p=0.02
Salinity	R²= 0.04; p=0.54	R²= -0.04; p=0.56
pH	R²=-0.08; p=0.40	R²=-0.08; p=0.40

Individuals	Abundance	Frequency	Mean	Deviation
Hydromeduza	0.10	6%	1.80	0.60
Ascidian larvae	1.79	19%	11.80	10.32
Cirripedia larvae	48.49	100%	64.49	71.52
Decapoda larvae	0.16	16%	1.31	0.52
Bivalvia larvae	0.01	1%	1.00	0.11
Mytilidae larvae	0.02	3%	1.00	0.16
Polychaeta larvae	0.04	4%	1.33	0.27
Creseis acicula	0.01	1%	1.00	0.11
Limacina inflata	0.02	3%	1.00	0.16
Ostracoda	0.02	3%	1.00	0.16
Paracalanus quasimodo	0.01	1%	1.00	0.11
Parvocalanus crassirostris	1.90	44%	5.17	5.94
Acrocalanus monachus	0.05	3%	2.50	0.46
Acartia tonsa	18.78	89%	27.27	67.86
Acartia lilljeborghi	0.01	1%	1.00	0.11
Temora turbinata	0.01	1%	1,00	0,11
Temora stylifera	0,01	1%	1,00	0,11
Oithona oswaldocruzi	0,26	15%	2,17	1,09
Oithona simplex	0,02	3%	1,00	0,16
Oncaea media	0,02	3%	1,00	0,16
Oncaea venusta	0,01	1%	1,00	0,11
Monstrilla bahiana	0,01	1%	1,00	0,11
Copepodite	26,58	93%	40,32	66,23
Nauplius	0,16	11%	1,67	0,75

Sociedade Brasileira de Carcinologia Instituto de Biociências, UNESP, Campus Botucatu, Rua Professor Doutor Antônio Celso Wagner Zanin, 250 , Botucatu, SP, 18618-689 - Botucatu - SP - Brazil
E-mail: editor.nauplius@gmail.com

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[1] Corresponding Author
Judson da Cruz Lopes da Rosa. e-mail: judsoncruz@yahoo.com.br