Influences of Climate Change and Variability on Estuarine Ecosystems: An Impact Study in Selected European, South American and Asian Countries

Filho, Walter Leal; Nagy, Gustavo J.; Martinho, Filipe; Saroar, Mustafa; Erache, Mónica Gómez; Primo, Ana Lígia; Pardal, Miguel Ângelo; Li, Chunlan

doi:10.3390/ijerph19010585

Cited by 52 publications

(19 citation statements)

References 60 publications

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“…Among the environmental variables observed for the MES, the water temperature was strongly marked by seasonality. In this case, other atmospheric influences, such as precipitation, nearshore sea temperatures, and river run-offs, are likely to influence its variability (Leal Filho et al, 2022). High water temperature in the premonsoon was evident in the present study.…”

Section: Environmental Status Of Mahanadi Estuarymentioning

confidence: 51%

Macrobenthic community of an anthropogenically influenced mangrove associated estuary on the East coast of India: An approach for ecological assessment

et al. 2022

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The Mahanadi Estuarine System (MES), with a complex network of freshwater channels, rivers, and mangroves, is a leading seaport in State Odisha on the east coast of India, but subjected to intense human activity in recent years. Such anthropic impingements are known to impact sediment-dwelling biota adversely. However, information on the macrobenthic community of the MES is not well documented yet. Therefore, the primary objectives of this study (February 2013-March 2017) were to address knowledge gaps on the macrobenthic community structure vis-à-vis local environmental conditions and to evaluate the extent of anthropogenic disturbances on macrobenthos. The results from 264 benthic grab samples (van Veen, 0.04 m2; 2 replicates × 12 GPS fixed locations × 3 seasons) revealed 73 taxa representing 64 genera and 48 families of macrobenthic fauna. The polychaetes (81.41%) and crustaceans (15.42%) were significant faunal groups that contributed mainly to the benthic population and diversity. Multivariate approaches using benthic community attributes and biotic indices (AMBI and M-AMBI) as proxy measures of environmental disturbances proved effective for appraisal. The correlations between the environmental parameters (temperature, pH, salinity) and community estimates were statistically significant. Hierarchical clustering analysis disclosed three major groups (Global R 0.70; p < 0.002) influenced by tolerant/opportunist species. The lower abundance, richness, diversity, and dominance of opportunistic species mark the signs of environmental stress. The community health status remained unbalanced, as indicated by AMBI scoring. M-AMBI analysis contributed best in differentiating areas exposed to diverse impacts and indicated polluted community health status with moderate ecological quality. Our results reiterate the effective use of macrobenthos as bioindicators for ecological status and monitoring. The findings could be utilized for future monitoring assessments, translated into valuable information, and designed into well-defined sustainable management strategies for the MES.

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Section: Environmental Status Of Mahanadi Estuarymentioning

confidence: 51%

Macrobenthic community of an anthropogenically influenced mangrove associated estuary on the East coast of India: An approach for ecological assessment

et al. 2022

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“…Even if long‐term environmental data series are needed to demonstrate that climate change could interfere with the eirenids‐bivalves relationship, we should increase our attention towards this association, above all in habitats prone to climate regime shifts, such as semi‐enclosed basins and estuarine habitats 88 . Monitoring activities will allow for prevention or control of eventual hydroid hyper‐proliferation.…”

Section: Resultsmentioning

confidence: 99%

“…Sharper differences occurred for both minimal values of SST and salinity between 1993-2010 and 2011-2020, which increased up to 5 C and 4 C, respectively. A new study on bivalve-inhabiting eirenids found in these basins could be useful to verify eventual changes in the distribution of the association and to detect areas that are more vulnerable to infestations.Even if long-term environmental data series are needed to demonstrate that climate change could interfere with the eirenids-bivalves relationship, we should increase our attention towards this association, above all in habitats prone to climate regime shifts, such as semi-enclosed basins and estuarine habitats 88. Monitoring activities will allow for prevention or control of eventual hydroid hyperproliferation.4 | CONCLUSIONSRegarding biotic/abiotic factors influencing the eirenids' prevalence and abundance, the proliferation of the polyp stage and the production of the free-living medusae/eumedusoids occur with high values of salinity; infestation occurs in sheltered and likely eutrophic areas with low water movement and low oxygen concentration.…”

mentioning

confidence: 99%

Guests or pests? Eirenid hydroids living on the soft tissue of bivalves

Camillo

Roveta

Mantas

et al. 2023

Reviews in Aquaculture

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Both wild and reared bivalves can host hydroids from the Eirenidae family which settle on the soft body parts of their host. Thousands of hydroids have been observed on a single bivalve, and often have severe detrimental effects on the host. However, this relationship has received little attention in aquaculture research, which is probably due to a lack of baseline data. An extensive review was conducted (i) to show the current level of knowledge on the association between eirenids and bivalves, providing a benchmark for future research; (ii) to detect a critical combination of biotic/abiotic factors that could switch the relationship from commensalism to infestation and (iii) to identify research priorities for future studies. Seventy scientific papers were screened to provide ecological information useful in understanding the hydroid‐host‐environment interactions and to show the global spatial and bathymetric distribution of the relationship. Although the main parameters influencing the hydroid abundance were identified, it was challenging to collate information from such heterogeneous data sources. A standardized method for data collection is proposed to obtain more robust and comparable data on the association. The most relevant and unstudied issue is the potential physiological and qualitative changes that could occur in infested bivalves. Monitoring the association could provide data needed to prevent or to control hyper‐proliferation of the symbionts and to detect eventual synergistic effects with climate change. This could be fundamental for species living in areas particularly prone to climate regime shifts, such as semi‐enclosed basins and estuarine habitats.

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“…It is widely recognized that marine ecosystems are under threat (Consortium 2021). Ocean acidification, the global increase in sea surface temperature, and change in salinity along with overfishing, eutrophication, sedimentation, and pollution endanger marine species globally (Buck-Wiese, Voolstra & Brüwer 2016;Ducklow et al 2022;Leal Filho et al 2022). At the same time, marine organisms adjust and cope with changing environments (Fuhrman 2009;Reusch 2014;Foo & Byrne 2016;Abirami et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Ocean acidification, the global increase in sea surface temperature, and change in salinity along with overfishing, eutrophication, sedimentation, and pollution endanger marine species globally (Buck-Wiese, Voolstra & Brüwer 2016; Ducklow et al . 2022; Leal Filho et al . 2022).…”

Section: Introductionmentioning

confidence: 99%

Microbial community changes correlate with impaired host fitness ofAurelia auritaafter environmental challenge

Pinnow

Chibani

Güllert

et al. 2023

Preprint

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Climate change globally endangers certain marine species, but at the same time, such changes may promote species that can tolerate and adapt to varying environmental conditions. Such acclimatization can be accompanied or possibly even be enabled by a host’s microbiome; however, few studies have so far directly addressed this process. Here we show that acute, individual rises in seawater temperature and salinity to sub-lethal levels diminished host fitness of the benthicAurelia auritapolyp, demonstrated by up to 34 % reduced survival rate, shrinking of the animals, and almost halted asexual reproduction. Changes in the fitness of the polyps to environmental stressors coincided with microbiome changes, mainly within the phyla Proteobacteria and Bacteroidota. The absence of bacteria amplified these effects, pointing to the crucial importance of a balanced microbiota to cope with a changing environment. In a future ocean scenario, mimicked by a combined but milder rise of temperature and salinity, the fitness of polyps was severely less impaired, together with condition-specific changes in the microbiome composition. Our results show that the effects on host fitness correlate with the strength of environmental stress, while salt-conveyed thermotolerance might be involved. Further, a specific, balanced microbiome ofA. auritapolyps is essential for the host’s acclimatization. Microbiomes may provide a means for acclimatization, and microbiome flexibility can be a fundamental strategy for marine animals to adapt to future ocean scenarios and maintain biodiversity and ecosystem functioning.

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Influences of Climate Change and Variability on Estuarine Ecosystems: An Impact Study in Selected European, South American and Asian Countries

Cited by 52 publications

References 60 publications

Macrobenthic community of an anthropogenically influenced mangrove associated estuary on the East coast of India: An approach for ecological assessment

Macrobenthic community of an anthropogenically influenced mangrove associated estuary on the East coast of India: An approach for ecological assessment

Guests or pests? Eirenid hydroids living on the soft tissue of bivalves

Microbial community changes correlate with impaired host fitness ofAurelia auritaafter environmental challenge

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