Small-scale distribution of the mesozooplankton in a tropical insular system

Campelo, Renata Polyana de Santana; Díaz, Xiomara Franchesca Garcia; Santos, Gleice S.; Melo, Pedro Augusto Mendes de Castro; Júnior, Mauro de Meló; Figueirêdo, Lucas Guedes Pereira; Silva, Andrea Pinto; Montes, Manuel de Jesús Flores; Neumann‐Leitão, Sigrid

doi:10.1590/s1679-87592018147306601

Cited by 6 publications

(5 citation statements)

References 47 publications

(53 reference statements)

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“…We observed higher zooplankton abundance and biovolume over the slope than the shelf and in offshore areas (Figure 2). These results contradict the typical coastaloceanic gradient, previously found in the study area (Bueno et al, 2017;Campelo et al, 2018;Santana et al, 2018) and elsewhere (Dai et al, 2016;Giering et al, 2018). Indeed it is typically assumed that zooplankton abundance follows a continuous gradient with higher abundance nearshore (Neumann-Leitão et al, 2008;Marcolin et al, 2013;Leitão et al, 2019).…”

Section: Spatial Patterns Of Zooplankton Abundance Biovolume Composition Size and Stable Isotope Ratioscontrasting

confidence: 73%

“…(2019) and Campelo et al (2018) in coastal and oceanic waters of the western tropical Atlantic as well as in numerous other regions, such as in the south Atlantic , the Mediterranean (Bănaru et al, 2014;Espinasse et al, 2014), the subtropical north Pacific (Dai et al, 2016), the western tropical north Pacific (Yang et al, 2016) and the eastern Atlantic (Marcolin et al, 2013). Interestingly, in most cases, δ 13 C values did not vary significantly with size, indicating that, in contrast to other studies (e.g., Schwamborn and Giarrizzo, 2015), the primary carbon sources of zooplankton in these size classes were similar, and carbon isotopic fractionation was negligible.…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

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Body size and stable isotope composition of zooplankton in the western tropical Atlantic

Figueiredo

Schwamborn

Bertrand

et al. 2020

Journal of Marine Systems

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Size-based approaches are paramount tools for the study of marine food webs. Here, we investigated the relationship between zooplankton body size, stable isotope composition and trophic level (TL) along a large-scale onshore-offshore gradient in the western tropical Atlantic. Samples were obtained on the Brazilian continental shelf, slope and in oceanic waters (off Fernando de Noronha archipelago and Rocas Atoll) in September and October 2015. Zooplankton was sieved into five size fractions. Zooplankton was dominated by copepods, except for the largest (>2000 μm) size fraction, that showed a high biovolume of chaetognaths, decapods, and fish larvae. Maximum zooplankton abundance and biovolume was found at the continental slope. POM showed consistently lower δ13C than zooplankton, indicating a selective use of 13C-rich primary food sources by zooplankton. Particulate organic matter (POM) was more 13Cenriched in shelf areas (average: −22.8, −23.6 and − 24.3‰ at the shelf, slope and oceanic islands, respectively), probably due to the higher abundance of diatoms nearshore. POM had δ15N values between 2.5 and 6.9‰ (average: 4.0, 4.9 and 4.2‰ at the shelf, slope and oceanic islands, respectively). Zooplankton δ15N and TL increased with body size. The δ15N of the 200-500 μm size fraction was used as baseline for TL estimation. Oceanic areas (average baseline δ15N = 5.8‰ ± 0.52, n = 14) showed a higher baseline δ15N than the shelf (average = 3.9‰ ± 0.69, n = 9) and the slope areas (average = 3.1‰ ± 0.93, n = 9). In spite of differing baselines, the δ15N data produced a consistent pattern of log-linear increase in TL with increasing size, in all areas. The choice of input trophic enrichment factor (TEF) values only slightly changed the log10 (body size) vs TL slopes, but this choice had a considerable effect on the estimates of predator/prey size ratio (PPSR) and predator/prey mass ratio (PPMR). Using a TEF above 2.3 leads to unrealistic PPSR and PPMR estimates. Overall average slope was 0.59 ± 0.08 TL μm−1 with TEF = 2.3 and 0.42 ± 0.07 TL μm−1 with TEF = 3.2. Highlights► Maximum zooplankton abundance and biovolume was found at the continental slope. ► POM showed lower δ 13 C than zooplankton, indicating selective feeding. ► Zooplankton δ 15 N and trophic level increased with body size. ► Using a δ 15 N trophic enrichment factor above 2.3 leads to unrealistic estimates.

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Section: Spatial Patterns Of Zooplankton Abundance Biovolume Composition Size and Stable Isotope Ratioscontrasting

confidence: 73%

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Body size and stable isotope composition of zooplankton in the western tropical Atlantic

Figueiredo

Schwamborn

Bertrand

et al. 2020

Journal of Marine Systems

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“…These nutrients stimulate the phytoplankton growth, favoring most zooplankton species, which are characteristically herbivores or omnivores (Johnson and Allen, 2005). This pattern is commonly found in Continental shelves (Neumann-Leitão et al, 1999, 2008Dias et al, 2015;Bueno et al, 2017) and oceanic islands (Campelo et al, 2018;Santana et al, 2018) in Brazil and reflect the typical coast-ocean gradient.…”

Section: Discussionsupporting

confidence: 59%

“…There is a reported relation between U. vulgaris and coastal areas due to its occurrence in neritic environs; U. vulgaris exhibits a high abundance in many inshore plankton hauls in the surface layer (Razouls et al, 2005). However, U. vulgaris dominated among copepods in samples from oceanic provinces in the economic exclusive zone (EEZ) of Northeastern Brazil (Cavalcanti and Larrazábal, 2004;Melo et al, 2014;Campelo et al, 2018). In our study, U. vulgaris was also abundant at young stages under oceanic influence, which suggested that it also inhabits oceanic regions with an epi-mesopelagic distribution.…”

Section: Discussionmentioning

confidence: 45%

Connectivity Between Coastal and Oceanic Zooplankton From Rio Grande do Norte in the Tropical Western Atlantic

et al. 2019

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Connectivity Between Coastal-Oceanic Zooplankton the reproduction and the trophic strategies were the main factors in structuring the community. We found a pelagic gradient for the zooplankton community varying from a low diverse eutrophic coastal area to a high diverse oligotrophic oceanic area, located over a varied, high biomass benthic habitat, which is mostly covered by calcareous algae functioning on the shallow shelf as a large reef system.

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“…The above-mentioned univariate and multivariate analyses were performed using software packages such as PRIMER software (Plymouth Routines In Multivariate Ecological Research Ver. 6), SPSS 20.0, and RStudio (Clarke et al 2001;Campelo et al 2018). Spatial map was prepared using Arc GIS software…”

Section: Discussionmentioning

confidence: 99%

Assessment of ecosystem health status using benthic diversity as tools in coastal sediment off the southwest coast, India

Arya

Godson

Selvaraj³

et al. 2022

Preprint

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The diversity of macro and meiobenthos was documented in order to assess the ecosystem health of an anthropogenically impacted coastal ecosystem for the first time along the southwest coast of Tamil Nadu. Offshore sediment and water samples (n = 63) were collected from 14 sampling stations using the grid sampling method. Water and sediment samples were analysed for environmental variables such as pH, temperature, electrical conductivity (EC), total dissolved solids (TDS), salinity, sulphate, dissolved oxygen (DO), carbohydrate (CHO), protein, lipid, labile organic matter (LOM), total organic carbon (Corg), total organic matter (TOM) and sediment texture using standard methods. Benthic macro and meiobenthos were isolated and identified using standard identification keys. A total of 5 phyla of macrobenthos with 29 species and 5 phyla of benthos with 60 species were identified in the study area. Relative abundance analysis showed that the largest numbers of species belonged to Polychaeta for macrobenthos and foraminifera for meiobenthos. Redundancy analysis indicated that sediment carbohydrate content was the highest determining factor for explaining variation in the diversity of benthos. AMBI & M-AMBI results revealed that among the 14 stations, 2 were categorized as “poor” and 9 as “bad”. Multiple anthropogenic activities in the coastal environment leading to increased organic matter input have resulted in a decline in the ecosystem health of this region, which warrants site-specific management to control organic pollution.

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Small-scale distribution of the mesozooplankton in a tropical insular system

Cited by 6 publications

References 47 publications

Body size and stable isotope composition of zooplankton in the western tropical Atlantic

Body size and stable isotope composition of zooplankton in the western tropical Atlantic

Connectivity Between Coastal and Oceanic Zooplankton From Rio Grande do Norte in the Tropical Western Atlantic

Assessment of ecosystem health status using benthic diversity as tools in coastal sediment off the southwest coast, India

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