Combined Effects of Drift Macroalgal Bloom and Warming on Occurrence and Intensity of Diel-Cycling Hypoxia in a Eutrophic Coastal Lagoon

Miyamoto, Yasushi; Nakano, Tadashi; Yamada, Katsumasa; Hatakeyama, Keisuke; Hamaguchi, Masami

doi:10.1007/s12237-018-0484-6

Cited by 14 publications

(5 citation statements)

References 47 publications

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“…Bottom hypoxia/anoxia is also known to predominantly take place in deep lagoons like Berre and Thau (Derolez et al, 2020a; Rigaud et al, 2021; Souchu et al, 1998), where wind derived water mixing is limited by depth. Nonetheless, anoxic crises inside coastal lagoons are expected to increase in frequency and intensity with climate change (Derolez et al, 2020a; Miyamoto et al, 2019). Consequently, it appears paramount to ( i ) study the sensitivity of lagoon benthic organisms to low dissolved oxygen, not only of freshwater and marine taxa (Díaz and Rosenberg, 1995; Landman et al, 2005) and ( ii ) monitor more closely summer bottom dissolved oxygen concentrations, especially at higher frequency (O 2 being very variable) and at temporal scales relevant to these organisms ( i.e.…”

Section: Discussionmentioning

confidence: 99%

Section: Eutrophication Affects Lagoon Macrobenthic Communities Throu...mentioning

confidence: 99%

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Disentangling the effects of eutrophication and natural variability on macrobenthic communities across French coastal lagoons

Jones

Schaal

Boyé

et al. 2022

Preprint

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Coastal lagoons are transitional ecosystems that host a unique diversity of species and support many ecosystem services. Owing to their position at the interface between land and sea, they are also subject to increasing human impacts, which alter their ecological functioning. Because coastal lagoons are naturally highly variable in their environmental conditions, disentangling the effects of anthropogenic disturbances like eutrophication from those of natural variability is a challenging, yet necessary issue to address. Here, we analyze a dataset composed of macrobenthic invertebrate abundances and environmental variables (hydro-morphology, water, sediment and macrophytes) gathered across 29 Mediterranean coastal lagoons located in France to characterize the main drivers of community composition and structure. Using correlograms, linear models and variance partitioning, we found that lagoon hydro-morphology (connection to the sea and surface) which affects the level of environmental variability (salinity and temperature), as well as lagoon-scale benthic habitat diversity (using macrophyte morphotypes) seemed to regulate macrofauna distribution, while eutrophication and associated stressors like low dissolved oxygen acted upon the existing communities, mainly by reducing species richness and diversity. Furthermore, M-AMBI, a multivariate index composed of species richness, Shannon diversity and AMBI (AZTI's Marine Biotic Index) and currently used to evaluate the ecological state of French coastal lagoons, was more sensitive to eutrophication (18%) than to natural variability (9%) with nonetheless 49% of its variability explained jointly by both. Conversely, AMBI was the only tested index that uniquely responded to eutrophication variables, which nonetheless explained less than a third of its variability. To improve the robustness of benthic indicators like M-AMBI and increase the effectiveness of lagoon benthic habitat management, we call for a revision of the ecological groups at the base of the AMBI index and of the current lagoon typology which could be inspired by the lagoon-sea connection levels used in this study.

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Section: Discussionmentioning

confidence: 99%

Section: Eutrophication Affects Lagoon Macrobenthic Communities Throu...mentioning

confidence: 99%

Disentangling the effects of eutrophication and natural variability on macrobenthic communities across French coastal lagoons

Jones

Schaal

Boyé

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Macroalgae drift, which includes rhodophytes (red algae), chlorophytes (green algae), and ochrophytes (brown algae), is formed mainly by the separation of conglomerates of typically ephemeral filamentous or leafy macroalgae, which facilitates their dispersal and sometimes reproduction [4] . Recently, eutrophication-induced micro- and macroalgae blooms and temperature increases accompanying climate change have become a serious threat to benthic organisms, leading to coastal hypoxia [5] . Harmful macroalgae blooms have increased along the coasts of China, Mexico, Thailand, Vietnam, and Japan, causing significant social impacts and economic losses [ 6 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

Fermentation of micro- and macroalgae as a way to produce value-added products

Babich,

Ivanova,

Michaud

et al. 2024

Biotechnology Reports

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“…The subsequent negative impacts, including algal blooms, organic pollution, hypoxia, and stratification, pose significant threats to the marine environment and ecosystem health (Meyer-Reil and Köster, 2000;Marcus, 2004). Within the context of global climatic change, the combined effects of rising temperatures and increased nutrient levels from eutrophication serve as prominent stressors with interconnected ecological implications in coastal waters (Miyamoto et al, 2019;Cheung et al, 2021;Wei et al, 2022), ultimately influencing the physicochemical processes of aquatic systems (Xia et al, 2016;Freeman et al, 2019;Song et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

Wang,

Huang

et al. 2023

Front. Mar. Sci.

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In the context of global change, the stressors of warming and eutrophication have significant ecological implications in coastal waters. In order to examine the diversity of phytoplankton and its relationship with water quality, we conducted a survey of phytoplankton community compositions and their correlation with environmental changes over four seasons in a eutrophic bay located in the East China Sea. Through a systematic analysis, we identified diatoms and dinoflagellates as the primary dominant groups, with the species Skeletonema costatum, Skeletonema marinoi, Biddulphia sinensis, Thalassiosira eccentrica, Leptocylindrus danicus, Coscinodiscus oculus-iridis, Coscinodiscus jonesianus, and Chaetoceros knipowitschi as the most abundant species in all seasons. Significant seasonal alterations were observed in both environmental settings and phytoplankton species richness, dominance, and abundance. The phytoplankton community varied in its response to diverse aquatic environments and was principally affected by temperature, silicic acid concentrations, and suspended solids. Elevated temperatures were found to promote an increase in phytoplankton abundance. However, no clear evidence of diatom and dinoflagellate succession in relation to N:P ratio was observed across seasons. Water quality analysis illustrated that the majority of the study area exhibited a mid-eutrophic with severe organic pollution. The abundance of phytoplankton was significantly influenced by eutrophication and organic pollution. The accelerated warming process related to coastal nuclear power plants and nutrient regime alterations significantly affect the temporal shift of the phytoplankton community. These findings contribute valuable insights into the effects of eutrophic environments on the structure of phytoplankton communities in coastal aquatic systems.

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Combined Effects of Drift Macroalgal Bloom and Warming on Occurrence and Intensity of Diel-Cycling Hypoxia in a Eutrophic Coastal Lagoon

Cited by 14 publications

References 47 publications

Disentangling the effects of eutrophication and natural variability on macrobenthic communities across French coastal lagoons

Disentangling the effects of eutrophication and natural variability on macrobenthic communities across French coastal lagoons

Fermentation of micro- and macroalgae as a way to produce value-added products

Scenarios of temporal environmental alterations and phytoplankton diversity in a changing bay in the East China Sea

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