Recreational uses in the coastal zone of central Chile

Author(s):  
Consuelo Castro ◽  
M. Inés Valenzuela
Keyword(s):  
Toxics ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 244
Author(s):  
Nicolás Latorre-Padilla ◽  
Andrés Meynard ◽  
Jorge Rivas ◽  
Loretto Contreras-Porcia

PAHs and heavy metals are characteristic pollutants in urbanized coastal areas, especially those with industrial activity. Given this context and the ability of Macrocystis pyrifera to drift when detached and provide trophic subsidy in coastal systems, we analyzed the potential transfer of pollutants to the herbivore Tetrapygus niger, through diet, in an industrialized coastal zone in Central Chile (Caleta Horcón) and characterized the impacted zone using diverse polluted ecotoxicological indices. For this purpose, a culture experiment was conducted where M. pyrifera individuals from Algarrobo (control site) were cultivated in Caleta Horcón and then used as food for T. niger. The contents of both PAHs and heavy metal contents were subsequently determined in algal tissue and sea urchin gonads as well as in the seawater. The results show that algae cultivated in Caleta Horcón had higher concentrations of naphthalene (NAF) compared to those from a low industrial impact zone (Algarrobo) (2.5 and 1.8 mg kg−1, respectively). The concentrations of Cu, As, and Cd were higher in Caleta Horcón than in Algarrobo in both M. pyrifera and T. niger. For all metals, including Pb, higher concentrations were present in T. niger than in M. pyrifera (between 5 and 798 times higher). Additionally, as indicated by the toxicological indices MPI (0.00804) and PLI (10.89), Caleta Horcón is highly contaminated with metals compared to Algarrobo (0.0006 and 0.015, respectively). Finally, the bioconcentration factor (BCF) and trophic transfer factor (TTF) values were greater than one in most cases, with values in Caleta Horcón exceeding those in Algarrobo by one or two orders of magnitude. This study provides evidence that Caleta Horcón is a highly impacted zone (HIZ) compared to Algarrobo, in addition to evidence that the biomagnification of certain pollutants, including the possible responses to contaminants, are apparently not exclusively transferred to T. niger through diet.


2014 ◽  
Vol 71 ◽  
pp. 55-61 ◽  
Author(s):  
Patricio A. Catalán ◽  
Rodrigo Cienfuegos ◽  
Mauricio Villagrán
Keyword(s):  

2015 ◽  
pp. 63
Author(s):  
A. V. Porotov ◽  
Yu. V. Gorlov ◽  
T. A. Yanina ◽  
E. Fouache
Keyword(s):  

2018 ◽  
Vol 28 (2) ◽  
pp. 226-232
Author(s):  
Nguyễn Quang Hưng ◽  
Trần Trọng Huệ ◽  
Nguyễn Xuân Huyên ◽  
Doãn Đình Lâm ◽  
Phan Đông Pha ◽  
...  
Keyword(s):  

Assessment of subaerial sediment environment for aquaculture planning in Hai Hau coastal zone


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