Long-term changes on estuarine ciliates linked with modifications on wind patterns and water turbidity

Abbate, M. Celeste López; Molinero, Juan‐Carlos; Perillo, Gerardo M. E.; Cao, María Sonia Barría de; Pettigrosso, Rosa E.; Guinder, Valeria A.; Uibrig, Román Armando; Berasategui, Anabela A.; Vitale, Alejandro José; Marcovecchio, Jorge Eduardo; Hoffmeyer, Mónica S.

doi:10.1016/j.marenvres.2018.12.001

Cited by 13 publications

(4 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, the turbidity of pond water fluctuated slightly (1.39–3.74 NTU) (Fig. 2 d), possibly due to the presence of strong seasonal wind, similar to observation reported by previous researchers 50 . Figure 2 e represents the total daily rainfall at the site of the natural outdoor pond throughout the four weeks of observation interval.…”

Section: Resultssupporting

confidence: 90%

Preliminary forensic assessment of the visualised fingerprints on nonporous substrates immersed in water using the green and optimised novel nanobio-based reagent

Azman

Mahat

Wahab

et al. 2022

Sci Rep

View full text Add to dashboard Cite

The discovery of forensic evidence (e.g. weapons) during forensic underwater investigations has seen an increasing trend. To date, small particle reagent (SPR) has been one of the routinely used methods for visualising fingerprints on wet, non-porous substrates. However, the long term use of SPR is detrimental to humans and environment due to the use of toxic chemicals. Although previously we have successfully developed and optimised a greener nanobio-based reagent (NBR), its suitable practical use in a more realistic scene (e.g. outdoor pond) was not evaluated. Therefore, this present research is aimed at (1) investigating the performance of NBR against the benchmark SPR in visualising fingerprints immersed in a natural outdoor pond and (2) evaluating the greenness of NBR against the analytical Eco-Scale. Results showed that the performance of the optimised NBR was mostly comparable (University of Canberra (UC) comparative scale: 0) with SPR at visualising fingerprints on three different non-porous substrates immersed in a natural outdoor pond. Observably, the NBR had higher preference towards aged fingerprints (up to 4 weeks of immersion). In addition, its greenness assessment revealed 76 points, indicating ‘excellent green analysis’. The findings gathered here further supported the practical use of the NBR in forensic investigations.

show abstract

Section: Resultssupporting

confidence: 90%

Preliminary forensic assessment of the visualised fingerprints on nonporous substrates immersed in water using the green and optimised novel nanobio-based reagent

Azman

Mahat

Wahab

et al. 2022

Sci Rep

View full text Add to dashboard Cite

show abstract

“…In general, the abundance of ciliates varied substantially across the study period at the Jiulong River estuary sampling site, with a narrow gradient of high estuarine salinities. In comparison to other coastal estuaries and bays worldwide (Chiang et al, 2003;Strom et al, 2007;Tsai et al, 2011;Haraguchi et al, 2018;Loìpez-Abbate et al, 2019;Yang et al, 2020;Gu et al, 2021), the abundance of ciliates was comparatively lower, ranging between 0 and 95 cells l −1 , although this was within the range reported in some literature (Santoferrara and Alder, 2009;Santoferrara et al, 2010). Additionally, due to the small number of sampling stations (1 station) and the short sampling period (6 days), only 13 ciliate species were recovered, far fewer than in previous largearea sampling studies in the estuary (Tsai et al, 2011;Yang et al, 2020;Gu et al, 2021).…”

Section: High Dynamics Of Ciliate Assemblagescontrasting

confidence: 56%

“…Typically, the abundances of microbial members change considerably between measured time points (Gonze et al, 2018). For example, monthly or interannual time-series studies have shown that the abundance of ciliates in the Bahía Blanca Estuary can fluctuate by an order of magnitude, and wind-induced processes and water turbidity are responsible for ciliate dynamics (Loìpez-Abbate et al, 2019). While these studies yielded valuable insights into the longterm dynamics of ciliates, they could be easily obscured by the strong seasonal variations, particularly in the case of an uneven sampling distribution and subsequent inaccuracies.…”

Section: Introductionmentioning

confidence: 99%

High Dynamics of Ciliate Community Revealed via Short-Term, High-Frequency Sampling in a Subtropical Estuarine Ecosystem

Huang

Zhang

et al. 2022

Front. Microbiol.

View full text Add to dashboard Cite

Ciliates are pivotal components of the marine microbial food web, exerting profound impacts on oceanic biogeochemical cycling. However, the temporal dynamics of ciliate assemblages on a short time scale in the highly fluctuating estuarine ecosystem remain largely unexplored. We studied changes in the ciliate community during a short time frame in the high salinity waters (>26) of a subtropical estuary. Ciliate abundance, biomass, size and oral diameter structure, and community composition fluctuated considerably and irregularly over a few days or even a few hours. Spearman correlations and the generalized linear model revealed that heterotrophic prokaryotes (HPs) and viral abundances drove the dynamics of ciliate abundance and biomass. The structural equation model further identified a major path from the high-fluorescence content virus (HFV) to HPs and then ciliates. Given the substantial correlation between salinity and HPs/HFV, we proposed that the response of HPs and HFV to salinity drives the dynamics of ciliate biomass. Additionally, the Mantel test showed that phytoplankton pigments such as Lutein and Neoxanthin, phosphate, and pigmented picoeukaryotes were key covariates of the ciliate community composition. This study demonstrated the highly changing patterns of ciliate assemblages and identified potential processes regulating ciliate biomass and community composition on short timescales in a subtropical, hydrographically complex estuary.

show abstract

“…Knowledge of regional microzooplankton derives from investigations further south in Argentinean waters (Thompson et al ., 1999; Thompson and Alder, 2005; Santoferrara and Alder, 2009), including the Patagonian shelf (Antacli et al ., 2018), the Beagle Channel (Barría de Cao et al ., 2013) and the Bahía Blanca estuary (Barría de Cao et al ., 2005, 2011; Pettigrosso and Popovich, 2009; López-Abbate et al ., 2015, 2019). Further observations are available for Brazilian coastal and shelf waters (Eskinazi-Sant'Anna and Björnberg, 2006; Islabão and Odebrecht, 2011; Gonçalves-Araujo et al ., 2018; Menezes et al ., 2019), and Patos Lagoon estuary (Jesus and Odebrecht, 2002).…”

Section: Introductionmentioning

confidence: 99%

Microzooplankton community structure in a subtropical South-West Atlantic coastal site

2023

View full text Add to dashboard Cite

The microzooplankton community structure (species abundance, biomass, diversity) was investigated at a coastal marine station on the South-West Atlantic Ocean (34°23′S–53°45′W, Uruguay). This is a hydrographically complex site within the Subtropical Convergence zone of the SW Atlantic where knowledge of the microzooplankton is particularly scant. The main goal was to perform a first characterization of that community and evaluate its association to environmental drivers along an annual cycle. Oceanographic variables (temperature, salinity, irradiance, nutrients, chlorophyll-a) and ciliates (aloricate and loricate), and dinoflagellates were recorded monthly from July 2019 to June 2020. Over 100 microzooplankton taxa belonging to approximately 30 families and 40 genera were identified, including several subtropical and subantarctic species. Community structure followed wide transitions at the seasonal scale – particularly between summer and winter as subtropical taxa alternated with euryhaline taxa from colder subantarctic waters. The core environmental variables (temperature, salinity and dissolved inorganic nitrogen [DIN]) explained overall variance in microzooplankton community assembly. During summer, high temperatures (20.3, 16.3–22.4°C) and low nutrients (DIN: 3.5, 0.7–6.7 μM; PO4: 1.0, 0.8–1.5 μM) benefited the development of aloricate ciliates. A nutrient pulse in winter posed favourable stoichiometric conditions and the numerical abundance was dominated by dinoflagellates and loricate ciliates in the following months, while diversity remained highest (taxonomic richness: 36 [22–46]; Shannon–Wiener index: 2.5 [1.9–2.8]). Results suggested that the microzooplankton community at the study site is mainly structured by hydrographic variability linked to the seasonal replacement of offshore water masses that differed in thermohaline properties and nutrient levels, and local processes.

show abstract

Long-term changes on estuarine ciliates linked with modifications on wind patterns and water turbidity

Cited by 13 publications

References 77 publications

Preliminary forensic assessment of the visualised fingerprints on nonporous substrates immersed in water using the green and optimised novel nanobio-based reagent

Preliminary forensic assessment of the visualised fingerprints on nonporous substrates immersed in water using the green and optimised novel nanobio-based reagent

High Dynamics of Ciliate Community Revealed via Short-Term, High-Frequency Sampling in a Subtropical Estuarine Ecosystem

Microzooplankton community structure in a subtropical South-West Atlantic coastal site

Contact Info

Product

Resources

About