Assessment of ecosystem health disturbance in mangrove-lined Caribbean coastal systems using the oyster Crassostrea rhizophorae as sentinel species

Aguirre-Rubí, Javier R.; Luna‐Acosta, Andrea; Ortiz-Zarragoitia, Maren; Zaldibar, Beñat; Izagirre, Urtzi; Ahrens, Michael J.; Villamil, Luisa; Marigómez, Ionan

doi:10.1016/j.scitotenv.2017.08.098

Cited by 40 publications

(14 citation statements)

References 71 publications

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“…The literature emphasizes the abiotic importance through local hydrodynamics, the chemical form of pollutants, the presence of other substrates competing for binding sites, and the physicochemical composition of the adjacent medium 27,61,62 , whereas the biotic ones include the life-cycle stage, gender, specific genetics, and physiological conditions [63][64][65][66] . In this study, we found that the variations appear predominantly as a combined effect of the biomonitors' proximity to the source of pollution, seasonal and hydrodynamic variation, and prior exposure of the biomonitor to metal-contaminated environments.…”

Section: Resultsmentioning

confidence: 99%

Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil

Mello

Crapez

Silva

et al. 2020

Sci Rep

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in this study, we analyzed the bioconcentration of cd, cr, cu, pb, ni, and Zn in the soft tissue of transplanted oysters in two sites in the potengi estuary for six months. native oysters collected before and after the transplantation experiment provided the background for statistical analyses. cd, cr, and ni showed a strong inverse correlation with oyster weight in both sites. transplantation upstream of the estuary presented increasing concentrations of Zn, cu, and pb and condition index (ci) and decreasing trends for Cd and Ni, whereas Cr oscillated significantly. In the downstream transplantation, cu, pb, and Zn and the ci tended to decrease, whereas for ni, cd, and cr, the concentrations increased. Spatiotemporal principal component analysis correlated these results mainly with proximity to the polluting source, seasonality, and previous exposure to heavy metals. these results helped interpret the responses provided by these biomonitors to environmental changes, whether they are natural or anthropogenic.Industrialization and urbanization are primary sources of heavy-metal contamination in estuaries and coastal ecosystems of tropical and subtropical countries (e.g., Brazil) 1,2 . Deforestation of estuarine margins also impairs the ability of the environment to withstand heavy-metal pollution, as mangrove forests are an important agent in the process of cycling organic matter and nutrients, acting as a "filter" by retaining and detoxifying harmful elements and substances 3-5 . It is a fact that metal pollution in aquatic systems will significantly increase in the future owing to the popularity of new technologies, such as nanotechnology, and the improper disposal of the so-called e-waste 6 .Metals widely available in estuarine environments tend to be trapped in sediments and incorporated into the local food chain. Thus, the presence of heavy metals in sediments can induce toxic effects in living organisms when they exceed certain concentration limits 5 . These limits, according to Farrington et al. 2 , are dependent on the half-life of the metal itself (or the metallic compound) and its nature (whether essential or nonessential) and on the tolerance of the organism to the environment it is exposed to. Once discarded in an estuarine system, heavy metals can undergo various processes, such as dissolution, precipitation, adsorption, and complexation (with organic and inorganic dissolved ligands and particulate matter), and become deposited in bottom sediments 7 . These processes can create a potential source of pollution and adversely affect the environmental quality 8,9 . Certain marine organisms, such as barnacles and bivalve mollusks, can metabolically accumulate large amounts of these metals in their tissues, having efficient strategies to tolerate toxicity and reduce damage in such a way that they can be employed in multipurpose environmental monitoring and several levels of environmental degradation, thus signifying the extent of pollution present in the adjacent water column 10,11 .Bioaccumulation of he...

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Section: Resultsmentioning

confidence: 99%

Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil

Mello

Crapez

Silva

et al. 2020

Sci Rep

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“…The increase in mucous cells in the lumen was accompanied by excess mucus as well as hemocyte diapedesis in the alimentary tract as a possible strategy to expel xenobiotics (Luna-Acosta et al, 2017;Vignier et al, 2018). Digestive gland edema was also found in wild C. rhizophorae from a contaminated site in Colombia (Aguirre-Rubí et al, 2018b). Yet, despite the inflammation and erosion of the digestive tract, mortality rates among spat remained low and insignificantly changed due to exposure to the HEWAF of crude oil.…”

Section: Histology and Physiologymentioning

confidence: 96%

“…Due to the fact that oysters live amongst potentially contaminated sediments, and are filterfeeders that clear particles from large volumes of seawater each day (National Research Council, 2004), oysters are likely exposed to many times more contaminants than either non-filter-feeders or nekton that do not live near the sediments. Despite this, oysters continue to thrive due to their resilience to pollutants with several studies such as dos Reis et al (2015) reporting no mortalities after exposing C. brasiliana to up to 1,000 µg L −1 phenanthrene (Phe) for up to 10 days, Perić et al (2020) reporting no mortalities after exposing O. edulis and M. gigas to up to 100 µg L −1 copper and 50 µg L −1 cadmium for up to 4 days, and Aguirre- Rubí et al (2018b) demonstrating that oysters stayed alive for as long as 10 days without water despite exhibiting possible contaminant-induced digestive gland atrophy and hemocytic infiltration of interstitial connective tissue. Thus their ability to survive despite the pollution while exhibiting measurable responses to it, combined with their distribution, living habits, and multiple life stages make oysters an exceptionally favorable bioindicator organism (Zhou et al, 2008).…”

Section: Oysters and Pahsmentioning

confidence: 99%

“…In other studies, the hepatopancreas is often referred to as the digestive gland (Bustamante et al, 2012b;Vaschenko et al, 2013;dos Reis et al, 2015;Shenai-Tirodkar et al, 2017;Aguirre-Rubí et al, 2018b;Perić et al, 2020;Shao and Wang, 2020) and the adductor is referred to as "muscle" (Bustamante et al, 2012b). The use of "soft tissues" is much more vague as it likely refers to gonads and mantle (Shao and Wang, 2020), non-gill tissue (Chan and Wang, 2019), or even all tissues combined and sometimes called either "total" or "whole" soft tissues (Aguirre-Rubí et al, 2018b;Sezer et al, 2018;Wang et al, 2020). In general, PAHs accumulated in the mantle or hepatopancreas, with gonad or gill next and adductor muscle last (Wang et al, 2020).…”

Section: Physiological Pah-accumulation Affinitymentioning

confidence: 99%

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Impact of Polycyclic Aromatic Hydrocarbon Accumulation on Oyster Health

Gan

Martin

2021

Front. Physiol.

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In the past decade, the Deepwater Horizon oil spill triggered a spike in investigatory effort on the effects of crude oil chemicals, most notably polycyclic aromatic hydrocarbons (PAHs), on marine organisms and ecosystems. Oysters, susceptible to both waterborne and sediment-bound contaminants due to their filter-feeding and sessile nature, have become of great interest among scientists as both a bioindicator and model organism for research on environmental stressors. It has been shown in many parts of the world that PAHs readily bioaccumulate in the soft tissues of oysters. Subsequent experiments have highlighted the negative effects associated with exposure to PAHs including the upregulation of antioxidant and detoxifying gene transcripts and enzyme activities such as Superoxide dismutase, Cytochrome P450 enzymes, and Glutathione S-transferase, reduction in DNA integrity, increased infection prevalence, and reduced and abnormal larval growth. Much of these effects could be attributed to either oxidative damage, or a reallocation of energy away from critical biological processes such as reproduction and calcification toward health maintenance. Additional abiotic stressors including increased temperature, reduced salinity, and reduced pH may change how the oyster responds to environmental contaminants and may compound the negative effects of PAH exposure. The negative effects of acidification and longer-term salinity changes appear to add onto that of PAH toxicity, while shorter-term salinity changes may induce mechanisms that reduce PAH exposure. Elevated temperatures, on the other hand, cause such large physiological effects on their own that additional PAH exposure either fails to cause any significant effects or that the effects have little discernable pattern. In this review, the oyster is recognized as a model organism for the study of negative anthropogenic impacts on the environment, and the effects of various environmental stressors on the oyster model are compared, while synergistic effects of these stressors to PAH exposure are considered. Lastly, the understudied effects of PAH photo-toxicity on oysters reveals drastic increases to the toxicity of PAHs via photooxidation and the formation of quinones. The consequences of the interaction between local and global environmental stressors thus provide a glimpse into the differential response to anthropogenic impacts across regions of the world.

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“…To quantify forest health, an appropriate indicator must be selected that should be easily understandable, be spatially and/or temporally explicit, relate to management objectives, and be quantifiable at the appropriate scale of monitoring (which can vary from trees to forest habitats) (Wicks et al, 2010;Trumbore et al, 2015;Aguirre-Rubí et al, 2018). For our purposes, the selected indicator must also be available over a long time frame and be quantifiable using remote sensing techniques because of the large spatial extent of mangroves in the study area (cf.…”

Section: Introductionmentioning

confidence: 99%

Modeling multi-decadal mangrove leaf area index in response to drought along the semi-arid southern coasts of Iran

Mafi-Gholami

Zenner

Jaafari

et al. 2019

Science of The Total Environment

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Leaf Area Index (LAI; as an indicator of the health) of the mangrove ecosystems on the northern coasts of the Persian Gulf and the Gulf of Oman was measured in the field and modeled in response to observed (1986-2017) and predicted (2018-2100) drought occurrences (quantified 22 using the Standardized Precipitation Index [SPI]). The relationship of LAI with the normalized difference vegetation index (NDVI) obtained from satellite images was quantified, the LAI between 1986 and 2017 retrospectively estimated, and a relationship between LAI and SPI developed for the same period. Long-term climate data were used as input in the RCP8.5 climate change scenario to reconstruct recent and forecast future drought intensities. Both the NDVI and the SPI were strongly related with the LAI, indicating that realistic LAI values were derived 28 from historic satellite data to portray annual changes of LAI in response to changes in SPI. Our findings show that projected future drought intensities modeled by the RCP8.5 scenario increase more and future LAIs decreased more on the coasts of the Gulf of Oman than the coasts of the 31 2 Persian Gulf in the coming decades. The year 1998 was the most significant change-point for mean annual rainfall amounts and drought occurrences as well as for LAIs and at no time

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Assessment of ecosystem health disturbance in mangrove-lined Caribbean coastal systems using the oyster Crassostrea rhizophorae as sentinel species

Cited by 40 publications

References 71 publications

Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil

Heavy metals bioconcentration in Crassostrea rhizophorae: A site-to-site transplant experiment at the Potengi estuary, Rio Grande do Norte, Brazil

Impact of Polycyclic Aromatic Hydrocarbon Accumulation on Oyster Health

Modeling multi-decadal mangrove leaf area index in response to drought along the semi-arid southern coasts of Iran

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