Frequent upwelling intrusions and rainfall events drive shifts in plankton community in a highly eutrophic estuary

Valentin, Jean Louis; Leles, Suzana Gonçalves; Tenenbaum, Denise Rivera; Figueiredo, Gisela M.

doi:10.1016/j.ecss.2021.107387

Cited by 10 publications

(6 citation statements)

References 55 publications

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“…The class Chlorophyceae indicates that silvofishery pond waters are eutrophic. The level of the trophic status of the waters is determined by geographical conditions, wind patterns, and seasons (Valentin et al, 2021). The more fertile the waters, the higher the succession of plankton at the genus and species level (Leles et al, 2021).…”

Section: Plankton Classesmentioning

confidence: 99%

Relationship Between Abundance of Clamydomonas spp and Chlorella spp on Clinical Performance of Red Tilapia Oreochromis niloticus in Silvofishery Ponds

Linayati,

Nhi,

Ariadi

et al. 2024

Croatian Journal of Fisheries

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Chlamydomonas spp. and Chlorella spp. are plankton genera that can be used to determine the level of balance in the aquatic environment. The purpose of this study is to determine the abundance of plankton Chlamydomonas spp. and Chlorella spp. and its relation to the clinical performance of red tilapia in silvofishery ponds. The research method used is an ex post facto causal design with random sampling. The results showed that the water quality in the silvofishery ponds was very good, except for the nitrate parameters of 0.00-1.50 mg/L and salinity of 2-11 gr/L, which exceeded the quality standards. In the silvofishery ponds, 5 plankton classes were found, namely Chlorophyceae, Cyanophyceae, Chrysophyceae, Protozoa, and Dinophysis, consisting of 15 genera. The dominant class Chlorophyceae had an abundance of 2.88E+06 cells/ml. The class Chlorophyceae is dominated by Chlorella spp. (2.63E+06 cells/ml) and Chlamydomonas spp. (2.20E+05 cells/ml). The abundance of Chlamydomonas spp. in silvofishery ponds is closely related to phosphate solubility (0.988). Based on observations of clinical symptoms on the eyes, gills, and fins of fish, no disease infections or physical abnormalities were found in the fish cultured in silvofishery ponds. Fish tend to live well with a growth rate of 0.44 g/day. The aquatic ecosystem of the silvofishery pond, which is dominated by the plankton Chlorella spp. and Chlamydomonas spp., had a good effect on the performance and condition of the farmed fish. This study concludes that the abundance of Chlamydomonas spp. and Chlorella spp. was very dominant compared to other plankton genera. The presence of Chlamydomonas spp. and Chlorella spp. illustrates good and stable environmental conditions in silvofishery ponds, followed by no clinical signs of disease infection in the fish reared during the study period.

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Section: Plankton Classesmentioning

confidence: 99%

Relationship Between Abundance of Clamydomonas spp and Chlorella spp on Clinical Performance of Red Tilapia Oreochromis niloticus in Silvofishery Ponds

Linayati,

Nhi,

Ariadi

et al. 2024

Croatian Journal of Fisheries

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“…Coastal upwelling of nutrient-rich SACW occurs near Cape Santa Marta (27°S-30°S; South Brazilian Coast), and Abrolhos-Campos region (15°S-23°S; East-Northeast Brazilian Coast) (Campos et al, 2013;Aguiar et al, 2014). Seasonal SACW intrusions derived from coastal upwelling has significant impacts on food web and plankton community composition (Valentin et al, 2021). Taking account, that SACW has low buffering capacity and is experiencing high rates of OA, the upwelling regions are particularly vulnerable.…”

Section: Coastal Upwelling Regionsmentioning

confidence: 99%

Coastal Ocean Acidification in Brazil: A Brief Overview and Perspectives

Cotovicz

Marins

Abril

2022

ACMAR

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This perspective paper aims at presenting the current knowledge on the processes of ocean acidification (OA) and coastal acidification (CA) in the Brazilian coastal ocean. We define and differentiate the processes of OA and CA: the first driven by the actual global increase of atmospheric carbon dioxide (CO2); the second driven by a combination of ocean uptake of atmospheric CO2 and other local/regional chemical additions or subtractions in aquatic ecosystems at the land-ocean interface. Regarding OA, we have centered our analysis on the data available for the main water masses along the Brazilian coast: South Atlantic Central Water (SACW), Tropical Water (TW), and Coastal Water (CW). The few data available for the shallow coastal waters (< 200 m depth) of the continental shelf reveal an increase in the anthropogenic component of the total dissolved inorganic carbon (DIC) pool in the SACW, with a decline in the ocean pH (over two decades; 1993-2013), and in the saturation state of calcium carbonate (CaCO3) minerals. We could not find OA trends for TW and CW because no data was available. Overall, the colder water masses (SACW, Plata Plume) have lower buffering capacity and simulations show that will potentially experience earlier negative OA impacts than the warmer waters masses (TW, Amazon Plume). Regarding CA, we have identified some local/regional studies investigating the carbonate chemistry in nearshore/estuarine ecosystems, particularly on the quantification of sources and sinks of CO2 , and determining short-term variabilities. Apparently, spreading coastal eutrophication in Brazil can enhances or reduces the process of OA, depending on the net ecosystem metabolism in combination with other chemical alterations. However, we could not find medium-long term acidification trends due to the limited data. There is a limited capacity to produce long time-series of carbonate chemistry parameters in key ecosystems and regions along the Brazilian coast. This lack of past information hinders and impairs the scientific community for identifying potential patterns of acidification along the Brazilian coast. We call for an urgent action in Brazil, with emphasis on the establishment of moored buoys/stations and/or scientific programs in the long term with continuous, real-time measurements of the main carbonate chemistry parameters. Keywords: ocean acidification, coastal acidification, coastal eutrophication, continental shelf, Southwestern Atlantic Ocean

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“…Guanabara Bay is an important estuarine bay ecosystem along the coast of Rio de Janeiro state (Kjerfve et al, 1997; Soares-Gomes et al, 2016). This coastal region undergoes seasonal coastal upwelling (Valentin, 2001; Valentin et al, 2021) associated with high productivity, which attracts fish from the shelf to forage, resulting in an important regional fish stock (Coelho-Souza et al, 2012) and plays an important role in fish distribution and diversity. The estuary shelters more than 202 species (Leite et al, 2018), including the whitemouth croaker, which is one of the most landed species in the bay (FIPERJ, 2020).…”

Section: Introductionmentioning

confidence: 99%

Archaeological and modern whitemouth croaker fish (Micropogonias furnieri) of southeastern Brazil: A geochemical proxy for environmental preference

et al. 2023

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In this study, laser ablation–inductively coupled plasma–mass spectrometry was used to characterize the growth patterns of otolith of Micropogonias furnieri from southeastern Brazil under the influence of coastal marine upwelling. Archaeological fish sagittae otoliths of M. furnieri recovered from Brazilian shell mounds (5820‒4980 cal BP) were analysed and compared with those of modern specimens. Otolith Sr/Ca analysis indicated that off southeastern Brazil, M. furnieri shifted from freshwater/brackish in archaeological specimens to brackish/marine in modern times. Regular core-to-edge Sr/Ca oscillations suggest that both modern and archaeological M. furnieri are resident estuarine fish that also use the marine waters adjacent to the coastal zone. Based on analyses of a wide range of otolith edge Sr/Ca values measured in archaeological samples, pre-colonial fishing activities in the coastal regions of Guanabara Bay occurred throughout the year. This study reinforces the importance of M. furnieri as a precolonial fishing resource in this area and demonstrates a shift in fishing practices, where smaller fish are targetted within the bay and larger fish are caught beyond the bay. These data may also be indicative of a shift in the life cycle of this species, possibly caused by the overfishing of this important resource and significant increase in human activities in protected coastal waters in modern times.

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Frequent upwelling intrusions and rainfall events drive shifts in plankton community in a highly eutrophic estuary

Cited by 10 publications

References 55 publications

Relationship Between Abundance of Clamydomonas spp and Chlorella spp on Clinical Performance of Red Tilapia Oreochromis niloticus in Silvofishery Ponds

Relationship Between Abundance of Clamydomonas spp and Chlorella spp on Clinical Performance of Red Tilapia Oreochromis niloticus in Silvofishery Ponds

Coastal Ocean Acidification in Brazil: A Brief Overview and Perspectives

Archaeological and modern whitemouth croaker fish (Micropogonias furnieri) of southeastern Brazil: A geochemical proxy for environmental preference

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