Bioaccumulation of some trace elements in tropical mangrove plants and snails (Can Gio, Vietnam)

Thanh‐Nho, Nguyen; Marchand, Cyril; Strady, Emilie; Huu-Phat, Nguyen; Nhu-Trang, Tran–Thi

doi:10.1016/j.envpol.2019.02.041

Cited by 41 publications

(18 citation statements)

References 84 publications

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“…Most suggest a decrease in photosynthesis, growth, and biomass (Maiti and Chowdhury, 2013). Although field observation reports on the low capacity of mangrove plants to absorb most metals, the same may not be true for mangrove animals (Thành-Nho et al, 2019). Notwithstanding, a key issue regarding metal accumulation and eventual harmful effects on mangrove biota depend on metal abundance and availability (Marchand et al, 2011;Lacerda et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

20-Years Cumulative Impact From Shrimp Farming on Mangroves of Northeast Brazil

Lacerda

Ward

Godoy

et al. 2021

Front. For. Glob. Change

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Brazilian mangroves cover about 11,100 km2 and provide a wide range of ecosystem services. Despite their importance, they are one of the most impacted ecosystems because of combined influences of climate change, pollution, and direct conversion and loss. A major driver of environmental impacts is shrimp farming and this is particularly acute in the semi-arid northeast of Brazil, where mangroves are constrained in a narrow band along ephemeral estuaries that are often impacted by multi-year droughts. Recent changes to Brazilian law, in particular the Forest Code, have weakened protection for mangroves and associated “apicum” (salt pan) ecosystems. In NE Brazil, most shrimp ponds are converted from mangrove-adjacent “apicuns” rather than the mangroves themselves with periodic hydrological connectivity through dammed channels, allowing the flushing of effluents. As a result, the main impacts on mangroves are typically indirect, because of pollution inputs from shrimp pond effluents and associated loss of ecosystem services including reductions in primary productivity, carbon storage capacity, resilience to other environmental stressors, their efficiency as estuarine filters, and biodiversity and abundance of subsistence use of marine species. Soil damage and infrastructure remaining after shrimp pond deactivation impairs mangrove recovery. This extends the duration of the damage and allows the occupation of degraded areas by other activities that can permanently impair ecosystem function. In this review, we address several aspects of the shrimp culture boom in NE Brazilian, their features and consequences, and the future of mangroves in the region considering climate change and rising poverty. Our conclusions on the practices and outcomes of shrimp farming in mangroves are likely to apply to areas with similar environmental settings, e.g., semiarid regions worldwide, and particularly in the Latin America and Caribbean region, and our findings can be taken into account to improve conservation and management of these forests at the least to a regional scale.

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Section: Methodsmentioning

confidence: 99%

20-Years Cumulative Impact From Shrimp Farming on Mangroves of Northeast Brazil

Lacerda

Ward

Godoy

et al. 2021

Front. For. Glob. Change

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“…The potential of plants to remove toxic metals, particularly mangrove plants, has been demonstrated in several studies worldwide [3,93,94]. The researchers discovered that the production of iron plaques on the roots of mangrove plants plays a critical function in preventing Fe and As transfer to the aerial portions [95]. We expressed interest in this venture since some countries, particularly poor countries such as Bangladesh, cannot change the situation overnight because many people rely on the lines of work that pollute our environment regularly.…”

Section: Phytoremediation and Basic Typesmentioning

confidence: 99%

Phytoremediation of Toxic Metals: A Sustainable Green Solution for Clean Environment

Babu¹,

Hossain

Rahman

et al. 2021

Applied Sciences

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Contamination of aquatic ecosystems by various sources has become a major worry all over the world. Pollutants can enter the human body through the food chain from aquatic and soil habitats. These pollutants can cause various chronic diseases in humans and mortality if they collect in the body over an extended period. Although the phytoremediation technique cannot completely remove harmful materials, it is an environmentally benign, cost-effective, and natural process that has no negative effects on the environment. The main types of phytoremediation, their mechanisms, and strategies to raise the remediation rate and the use of genetically altered plants, phytoremediation plant prospects, economics, and usable plants are reviewed in this review. Several factors influence the phytoremediation process, including types of contaminants, pollutant characteristics, and plant species selection, climate considerations, flooding and aging, the effect of salt, soil parameters, and redox potential. Phytoremediation’s environmental and economic efficiency, use, and relevance are depicted in our work. Multiple recent breakthroughs in phytoremediation technologies are also mentioned in this review.

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“…Additionally, higher NH 4 concentrations (Taillardat et al, 2019), pCO 2 and CO 2 emissions (David et al, 2018b;Taillardat et al, 2018;Vinh et al, 2019) were measured during the monsoon due to enhanced microbial activity. The monsoon also increased metal loads in the estuary (Thanh-Nho et al, 2018), and it was demonstrated that their transfer to the biota differed between mangrove stands (Thanh-Nho et al, 2019). Consequently in previous studies concerning Can Gio mangrove, we were able to show: (i) the importance of mangrove-derived organic matter in the functioning of this estuary, (ii) the seasonal variability of OM quality and mineralization, (iii) the influence of OM on trace metals cycling; however up to now, the first step of mangrove leaf litter decomposition was not studied.…”

Section: Introductionmentioning

confidence: 99%

Changes in Leaf Litter Quality During Its Decomposition in a Tropical Planted Mangrove Forest (Can Gio, Vietnam)

Vinh

Allenbach²,

Linh

et al. 2020

Front. Environ. Sci.

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Mangroves are highly productive ecosystems, being key components of trophic food chains along tropical coastlines. In Southern Vietnam, planted Rhizophora apiculata develops in the upper intertidal zone, while Avicennia alba naturally colonizes areas at lower elevation along tidal creeks. The main objective of this study was to quantify the seasonal variability of leaf litter decomposition rates considering that in previous studies we observed a strong influence of the monsoon on C and nutrients cycling within the mangrove and in adjacent creeks. We were also interested in changes in the quality of the leaf litter during its decomposition, focusing on nutrients, δ 13 C, and trace metals. To reach our goals, we used the litterbag technique. During the monsoon, leaf litter decay rates were increased in the Avicennia stand, most probably because of enhanced leaching resulting from a higher level of the river due to heavy rainfall. In addition, the enhanced decay rates measured in the Avicennia stand during the rainy season resulted in a strong 13 C depletion, while 13 C enrichment was measured in the other conditions. Elemental concentrations changes during decay were not clearly influenced by season, but depended on the element considered. K, Mg, Na, and Ca had t 50 values lower than the one of the bulk material. P and S contents also rapidly decreased during the first decomposition stages, but these elements had longer t 50 values than the bulk leaves. Conversely, an enrichment in most trace metals was observed during leaf litter decomposition whatever the season. We suggest that these metals were either trapped from the water column and the forest floor by organic molecules composing the litter, or subjected to litter decomposers uptake. Consequently, this study shows that the release or the uptake of elements during mangrove leaf litter decomposition varied with different parameters, which may have ecological implications on the nature of the elements exported toward adjacent ecosystems, and on their primary productivity.

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Bioaccumulation of some trace elements in tropical mangrove plants and snails (Can Gio, Vietnam)

Cited by 41 publications

References 84 publications

20-Years Cumulative Impact From Shrimp Farming on Mangroves of Northeast Brazil

20-Years Cumulative Impact From Shrimp Farming on Mangroves of Northeast Brazil

Phytoremediation of Toxic Metals: A Sustainable Green Solution for Clean Environment

Changes in Leaf Litter Quality During Its Decomposition in a Tropical Planted Mangrove Forest (Can Gio, Vietnam)

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