Different trophodynamics between two proximate estuaries with differing degrees of pollution

Are stable isotopes an efficient tool for tracking the effect of anthropogenic activities on mangrove food web structure and function?

“…The analysis of 206Pb/207Pb and 208Pb/207Pb ratios confirmed that the Pb isotope values in all sampling sites were similar to sites with typical metallurgical activities (Souza et al, 2018 , 2021 ). The authors suggest that this result is due to the presence of anthropogenic aerosols containing Pb from industrial sources, such as mining, smelting, coal burning, crushing, grinding, separation, refining, and residue management.…”

“…The numbers correspond to studies from the oldest (1) to the most recent (16). (1): Tallow and Belongil Creeks, Australia (Hadwen & Arthington, 2007 ); (2): Annandale Wetland, Australia (Sheaves et al, 2007 ); (3) Moreton Bay, Australia (Pitt et al, 2009 ); (4) Botany and Homebush Bays, Australia (Mazumder et al, 2015 ); (5) Chiriquí Gulf, Panamá (Viana et al, 2015 ); (6): La Paz Bay, México (López-Rasgado et al, 2016 ), (7) Puloh River, Malaysia (Zulkifli et al, 2016 ); (8) Dulce Gulf, Costa Rica (Samper-Villarreal et al, 2018 ), (9) Vitória and Santa Cruz Bays, Brasil (Souza et al 2018 ); (10) Piraquê-Açu-Mirim Estuary, Brasil (Fraga et al, 2018 ), (11) Makoba and Chwaka Bays, Tanzania (Mwandya, 2019 ), (12) Mantang mangrove forest reserve, Peninsular Malaysia (Then et al, 2020 ), (13) Buenaventura and Málaga Estuaries, Colombia (Medina-Contreras et al, 2021 ), (14) Vitória and Santa Cruz Bays, Brasil (Souza et al, 2021 ), (15) Dar es Salaam and Pawani mangroves, Tanzania (Lugendo & Kimirei, 2021 ), and (16) Qinglan Mangrove Nature Reserve, China (Herbeck et al, 2021 ). World mangroves distribution (Giri et al, 2010 ) and oceanic regions (Spalding et al, 2007 ) …”

“…The effect of the deposition of residues from metallurgical activities on mangrove food webs through stable isotopes was analyzed through two studies (Souza et al, 2018 , 2021 ) from Brazil. The articles hypothesized that the evaluation of multiple stable isotopes in mangrove ecosystems allows for linking anthropogenic activity to different levels and sources of contamination.…”

“…Additionally, most metals were biomagnified through the mangrove food web and were found in all trophic levels (Souza et al, 2021 ). Due to the similar trophodynamics of non-polluted and polluted mangroves and the unequal transfer patterns in other cases, the effectiveness of 15 N to study food webs with aquatic biota affected by anthropogenic contaminants is questionable.…”

Settleable atmospheric particulate matter affects cardiorespiratory responses to hypoxia in Nile tilapia (Oreochromis niloticus)

“…Recent studies have demonstrated that aquatic environments may be affected by atmospheric particulate matter (APM) derived from industrial activities for steel processing (Callén et al, 2009;Park and Kim, 2005;Tsai and Cheng, 2004). Steel industries emit a complex mixture of solid and/or liquid particles into the atmosphere which may vary in composition, shape and size, and includes metallic nanoparticles and metallic compounds (Souza et al, 2021a). Estuarine waters in Vitória Bay, Espírito Santo State -BR, are contaminated by a range of metallic particles (including Al, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Ag, Cd, Hg, Pb) derived from settleable APM (SePM) (Souza et al, 2021b and2021c).…”