Long-term study of seasonal changes in phytoplankton community structure in the western Mediterranean (Valencian Community)

Pachés, M.; Aguado, Daniel; Martínez-Guijarro, R.; Romero, I.

doi:10.1007/s11356-019-04660-x

Cited by 14 publications

(8 citation statements)

References 33 publications

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“…Considering the high abundance and ecological importance of diatoms and dinoflagellates in coastal waters, understanding the interactive effect of both warming and anthropogenic input to these phytoplankton is essential for evaluating the fate of coastal marine ecosystems in the future scenarios. In particular, long‐term monitoring in marine ecosystems can provide valuable data for understanding the environmental driving force of these phytoplankton and informing future projections (Nohe et al, 2020; Paches et al, 2019; Yvon‐Durocher et al, 2015). Nevertheless, there is currently a lack of long‐term trend analysis of phytoplankton abundance in highly urbanized subtropical or tropical coastal waters, with many previous studies focused on higher latitudes or offshore waters (Malviya et al, 2016; Ocean Biodiversity Information System [OBIS], 2020).…”

Section: Introductionmentioning

confidence: 99%

Distinct interaction effects of warming and anthropogenic input on diatoms and dinoflagellates in an urbanized estuarine ecosystem

Cheung

Mak

et al. 2021

Global Change Biology

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Diatoms and dinoflagellates are two major bloom‐forming phytoplankton groups in coastal ecosystems and their dominances will notably affect the marine ecosystems. By analyzing an 18‐year monthly monitoring dataset (2000–2017) in the Pearl River Estuary (one of the most highly urbanized and populated estuarine in the world), we observe an increasing trend of the diatom to dinoflagellate ratio (Diatom/Dino). As revealed by multiple statistical models (generalized additive mixed model, random forest, and gradient boosting algorithms), both groups are positively correlated with temperature. Diatoms are positively correlated with nitrate and negatively correlated with ammonium while dinoflagellates show an opposite pattern. The Diatom/Dino trend is explained by an altered nutrient composition caused by a decadal increase in anthropogenic input, at which nitrate increased rapidly while ammonium and phosphate were relatively constant. Regarding the interaction of warming and nutrient dynamics, we observe an additive effect of warming and nitrate enrichment that promotes the increase in diatom cell density, while the dinoflagellate cell density only increases with warming when nutrients are depleted. Our models predict that the Diatom/Dino ratio will further increase with increasing anthropogenic input and global warming in subtropical estuarine ecosystems with nitrate as the dominant inorganic nitrogen; its ecological consequences are worthy of further investigation.

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Section: Introductionmentioning

confidence: 99%

Distinct interaction effects of warming and anthropogenic input on diatoms and dinoflagellates in an urbanized estuarine ecosystem

Cheung

Mak

et al. 2021

Global Change Biology

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“…When the episodes of phytoplankton blooms occur in areas where shellfish are cultured or areas for fisheries, or even in bathing waters, they can lead to environmental, health, and economic problems. In recent years, there have been several cases of phytoplankton proliferation along the coasts of Europe [ 3 ], particularly in intensive shellfish culture areas, including Spain (e.g., Andalusia [ 4 ], Galicia [ 5 ], the Valencia Community [ 6 ], and Murcia [ 7 ]). The increase in water temperature, changes in salinity, and water dissolved nutrients stoichiometry in coastal waters, mainly due to agricultural run-off or urban wastewater discharges, are some of the factors suggested for an increase in the proliferation of potentially toxic phytoplankton, thus increasing the concentration of toxins in aquatic environments [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Monitoring Lipophilic Toxins in Seawater Using Dispersive Liquid—Liquid Microextraction and Liquid Chromatography with Triple Quadrupole Mass Spectrometry

Oller-Ruiz

Campillo

Hernández‐Córdoba

et al. 2021

Toxins

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The use of dispersive liquid–liquid microextraction (DLLME) is proposed for the preconcentration of thirteen lipophilic marine toxins in seawater samples. For this purpose, 0.5 mL of methanol and 440 µL of chloroform were injected into 12 mL of sample. The enriched organic phase, once evaporated and reconstituted in methanol, was analyzed by reversed-phase liquid chromatography with triple-quadrupole tandem mass spectrometry. A central composite design multivariate method was used to optimize the interrelated parameters affecting DLLME efficiency. The absence of any matrix effect in the samples allowed them to be quantified against aqueous standards. The optimized procedure was validated by recovery studies, which provided values in the 82–123% range. The detection limits varied between 0.2 and 5.7 ng L−1, depending on the analyte, and the intraday precision values were in the 0.1–7.5% range in terms of relative standard deviation. Ten water samples taken from different points of the Mar Menor lagoon were analyzed and were found to be free of the studied toxins.

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“…Besides, functional gene markers, especially rbcL, which encodes the large subunit (L) of ribulose-1,5bisphosphate carboxylase/oxygenase (RubisCO) involved carbon assimilation [11,12], have been extensively used and provide increased resolution for assessments of biodiversity on picophytoplankton community across different coastal environments, including the bay of Bengal [13], Western Iberia [14], Western Mediterranean [15] and Northern South China Sea [9]. Although the general patterns underlying variations in biodiversity have been observed across spatial and temporal scales, the effects of eutrophic conditions that controlling these patterns on picophytoplankton communities remain unclear in a subtropical coastal ecosystem.…”

Section: Introductionmentioning

confidence: 99%

Trophic States Regulate Assembly Processes and Network Structures of Picophytoplankton Communities in Subtropical Coastal Ecosystems

Chen

Zhao

Jiang

et al. 2020

Preprint

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Background: Long-term coastal eutrophication especially in semi-enclosed marine areas is driven by increased amounts of nutrients derived from anthropogenic activities. Given that accelerating nutrients may constitute a strong environmental filter, understanding the diversity, assembly process and co-occurrence pattern of picophytoplankton communities in response to increasing coastal eutrophication is clearly of great importance. Results: We investigated picophytoplankton community changes using rbcL gene amplicon sequencing. The results exhibited that the alpha diversity (ANOVA, p < 0.001) and beta diversity (ANOSIM, p < 0.001) were significantly different among eutrophic states. Further, phylogenetic based β-nearest taxon distance analyses revealed that stochastic processes mainly provided 69.26% contribution to picophytoplankton community assembly, whereas deterministic processes dominated community assembly in a heavy eutrophic state. Integrated co-occurrence networks modularly responded to eutrophic states and revealed that keystone taxa mainly belonged to the oligo eutrophic group, which may play fundamental roles in network persistence. Importantly, increased environmental disturbances, such as nitrogen and phosphorus nutrients, could alter picophytoplankton community structure and disrupt ecological processes. Conclusion: Stochastic and deterministic processes simultaneously influenced the assembly of picophytoplankton communities in the subtropical coastal ecosystems. Eutrophic disturbances alert the assembly processes and network structures of picophytoplankton community. Our findings promote the understanding of fundamental ecological processes along eutrophic gradients in subtropical coastal ecosystems.

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Long-term study of seasonal changes in phytoplankton community structure in the western Mediterranean (Valencian Community)

Cited by 14 publications

References 33 publications

Distinct interaction effects of warming and anthropogenic input on diatoms and dinoflagellates in an urbanized estuarine ecosystem

Distinct interaction effects of warming and anthropogenic input on diatoms and dinoflagellates in an urbanized estuarine ecosystem

Monitoring Lipophilic Toxins in Seawater Using Dispersive Liquid—Liquid Microextraction and Liquid Chromatography with Triple Quadrupole Mass Spectrometry

Trophic States Regulate Assembly Processes and Network Structures of Picophytoplankton Communities in Subtropical Coastal Ecosystems

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