Long-Term (1970–2017) Temporal Trends of Polychlorinated Biphenyls in Fish, Settling Material, and Sediments from Populated and Remote Sites in Río de la Plata Estuary, Argentina

2018 ◽  
Vol 52 (21) ◽  
pp. 12412-12418 ◽  
Author(s):  
Juan Carlos Colombo ◽  
Eric Demian Speranza ◽  
Malena Astoviza ◽  
María Carolina Migoya ◽  
Carlos Norberto Skorupka ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Temporal Trends ◽  
Rio De La Plata ◽  
Río De La Plata ◽  
La Plata ◽  
Remote Sites

Sampling estuarine copepods at different scales and resolutions: a study in Rio de la Plata

2018 ◽  
Vol 99 (5) ◽  
pp. 1059-1064 ◽  
Author(s):  
Sourav Paul ◽  
Danilo Calliari
Keyword(s):  
Sampling Effort ◽  
Rio De La Plata ◽  
Population Densities ◽  
Medium Term ◽  
Short Term ◽  
Río De La Plata ◽  
La Plata ◽  
Resource Limitations ◽  
Paracalanus Parvus

AbstractIn the Rio de la Plata salinity, temperature, chlorophyll a (chl a), and densities (ind. m−3) of the copepods Acartia tonsa and Paracalanus parvus were measured from January to November in 2003 by following a nested weekly and monthly design. Such sampling yielded two separate datasets: (i) Yearly Dataset (YD) which consists of data of one sampling effort per month for 11 consecutive months, and (ii) Seasonal Weekly Datasets (SWD) which consists of data of one sampling effort per week of any four consecutive weeks within each season. YD was assumed as a medium-term low-resolution (MTLR) dataset, and SWD as a short-term high-resolution (STHR) dataset. The hypothesis was, the SWD would always capture (shorter scales generally captures more noise in data) more detail variability of copepod populations (quantified through the regression relationships between temporal changes of salinity, temperature, chl a and copepod densities) than the YD. Analysis of both YD and SWD found that A. tonsa density was neither affected by seasonal cycles, nor temporal variability of salinity, temperature and chl a. Thus, compared to STHR sampling, MTLR sampling did not yield any further information of the variability of population densities of the perennial copepod A. tonsa. Analysis of SWD found that during summer and autumn the population densities of P. parvus had a significant positive relationship to salinity but their density was limited by higher chl a concentration; analysis of YD could not yield such detailed ecological information. That hints the effectiveness of STHR sampling over MTLR sampling in capturing details of the variability of population densities of a seasonal copepod species. Considering the institutional resource limitations (e.g. lack of long-term funding, manpower and infrastructure) and the present hypothesis under consideration, the authors suggest that a STHR sampling may provide useful complementary information to interpret results of longer-term natural changes occurring in estuaries.

scholarly journals The effect of long-term and decadal climate and hydrology variations on estuarine marsh dynamics: An identifying case study from the Río de la Plata

Geomorphology ◽  
2016 ◽  
Vol 269 ◽  
pp. 122-132 ◽  
Author(s):  
M. Schuerch ◽  
J. Scholten ◽  
S. Carretero ◽  
F. García-Rodríguez ◽  
K. Kumbier ◽  
...  
Keyword(s):  
Rio De La Plata ◽  
Río De La Plata ◽  
La Plata ◽  
Decadal Climate

Long-Term Accumulation of Individual PCBs, Dioxins, Furans, and Trace Metals in Asiatic Clams from the Rio de la Plata Estuary, Argentina

1997 ◽  
Vol 31 (12) ◽  
pp. 3551-3557 ◽  
Author(s):  
Juan C. Colombo ◽  
Charles Brochu ◽  
Claudio Bilos ◽  
Patricia Landoni ◽  
Serge Moore
Keyword(s):  
Trace Metals ◽  
Rio De La Plata ◽  
Río De La Plata ◽  
La Plata

scholarly journals Long-term assessment of trace elements in franciscana dolphins from the Río de la Plata estuary and adjacent Atlantic waters

2021 ◽  
pp. 147797
Author(s):  
Odei Garcia-Garin ◽  
Asunción Borrell ◽  
Morgana Vighi ◽  
Alex Aguilar ◽  
Meica Valdivia ◽  
...  
Keyword(s):  
Trace Elements ◽  
Rio De La Plata ◽  
Río De La Plata ◽  
La Plata
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