Harmful Algal Blooms in Chinese Coastal Waters Will Persist Due to Perturbed Nutrient Ratios

Wang, Junjie; Bouwman, A. F.; Liu, Xiaochen; Beusen, Arthur; Dingenen, Rita Van; Dentener, Frank; Yao, Yulong; Glibert, Patricia M.; Ran, Xiangbin; Yao, Qingzhen; Xu, Bochao; Yu, Rencheng; Middelburg, Jack J.; Yu, Zhigang

doi:10.1021/acs.estlett.1c00012

Cited by 71 publications

(33 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Changjiang River and Yellow River are two of the largest sources of freshwater to the East China Continental Sea, with annual discharges of 932.3 Â 10 9 and 43.1 Â 10 9 m 3 , respectively (Yincan et al 2017). The East China Continental Sea is also characterized by high productivity (Gong et al 2003), algal blooms (Wang et al 2021), and coastal upwelling (Wang and Wang 2007).…”

Section: Study Area and Samplingmentioning

confidence: 99%

Transformation processes of biogenic dimethylated sulfur compounds in the northwestern Pacific continental sea

Zhang

Feng

et al. 2022

Limnology & Oceanography

View full text Add to dashboard Cite

Biogenic dimethylated sulfur compounds, comprising dimethylsulfide (DMS), dimethylsulfoniopropionate (DMSP), and dimethylsulfoxide, play a vital role in the physiological metabolism processes of marine algae, climate regulation, and global sulfur cycles, but the contribution of each transformation pathway and the factors that control them remain uncertain. For the first time, from 27 March 2017 to 15 April 2017, the rates of major transformation pathways of biogenic dimethylated sulfur compounds and the fluxes of DMS at the sea-air and seawater-sediment interfaces were measured simultaneously in the East China Continental Sea. Rapid biological turnover times of total DMSP (0.53 d), dissolved DMSP (0.29 d), and DMS (0.43 d) were observed, indicating that DMS and DMSP were renewed more than twice daily. Bacterial consumption contributed nearly 50% of the total DMSP loss, approximately 38% of which was converted into DMS. Microbial consumption, photolysis, and ventilation accounted for 56%, 34%, and 10% of DMS removal processes, respectively. Sediment had a small but positive flux of DMS, making the sediment-seawater interface a tiny source of DMS to the water column. Finally, although only about 10% of DMS was emitted to the atmosphere, the study region was identified as a "hotspot" for atmospheric DMS. The DMS budget model of the mixed layer developed in this study has provided a systematic and comprehensive understanding of the organosulfur cycle in continental shelf seas.

show abstract

Section: Study Area and Samplingmentioning

confidence: 99%

Transformation processes of biogenic dimethylated sulfur compounds in the northwestern Pacific continental sea

Zhang

Feng

et al. 2022

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…Große et al [112] estimated that N loading reductions of 50% will be required to reduce the extent of hypoxia. While massive N reductions have a high potential for mitigating blooms and hypoxia (Figures 4(k) and 4(l)) [112], Wang et al [118] showed that because nutrients in China's coastal systems originate from agriculture, aquaculture, industry, and wastewater and, due to the fundamental differences in the biogeochemical cycling of N and P, reductions in N are-and will be-exceedingly difficult to achieve, regardless of the scenario.…”

Section: Case Studies Of Multiple Stressors and Their Complexitiesmentioning

confidence: 99%

Stressing over the Complexities of Multiple Stressors in Marine and Estuarine Systems

Glibert

Cai

Hall

et al. 2022

Ocean-Land-Atmos Res

View full text Add to dashboard Cite

Aquatic ecosystems are increasingly threatened by multiple human-induced stressors associated with climate and anthropogenic changes, including warming, nutrient pollution, harmful algal blooms, hypoxia, and changes in CO2 and pH. These stressors may affect systems additively and synergistically but may also counteract each other. The resultant ecosystem changes occur rapidly, affecting both biotic and abiotic components and their interactions. Moreover, the complexity of interactions increases as one ascends the food web due to differing sensitivities and exposures among life stages and associated species interactions, such as competition and predation. There is also a need to further understand nontraditional food web interactions, such as mixotrophy, which is the ability to combine photosynthesis and feeding by a single organism. The complexity of these interactions and nontraditional food webs presents challenges to ecosystem modeling and management. Developing ecological models to understand multistressor effects is further challenged by the lack of sufficient data on the effects of interactive stressors across different trophic levels and the substantial variability in climate changes on regional scales. To obtain data on a broad suite of interactions, a nested set of experiments can be employed. Modular, coupled, multitrophic level models will provide the flexibility to explore the additive, amplified, propagated, antagonistic, and/or reduced effects that can emerge from the interactions of multiple stressors. Here, the stressors associated with eutrophication and climate change are reviewed, and then example systems from around the world are used to illustrate their complexity and how model scenarios can be used to examine potential future changes.

show abstract

“…The average of nutrient ratios in Yangtze River Estuary (Li et al, 2010), Pearl River Estuary (Yin et al, 2001), Jiulong River Estuary and Chinese coastal waters (Wang et al, 2021). Red dashed line represented the threshold of nutrient ratio to inform potential P, N, and Si limitation (Justi ć et al, 1995).…”

Section: Figure 12 |mentioning

confidence: 99%

Phytoplankton Species Diversity Patterns and Associated Driving Factors in China’s Jiulong River Estuary: Roles That Nutrients and Nutrient Ratios Play

Chen

et al. 2022

Front. Mar. Sci.

View full text Add to dashboard Cite

Understanding diversity patterns and associated driving factors are the critical topics in macroecology and conservation biology. Phytoplankton are highly susceptible to environmental changes in estuaries, particularly eutrophication. This study examined phytoplankton alpha and beta diversity using investigation data in May (springtime), August (summer) and November (autumn) 2009 in China’s Jiulong River estuary, where it was easily polluted because of considerable discharge from a highly dense human population and low self-purification capacity with its limited river basin area, potentially resulting in eutrophication and then influencing phytoplankton diversity. Potential influencing factors were also explored, including dissolved oxygen, salinity, nutrients, nutrient ratios, geographic and hydrologic distance, and so on. The results indicated that Shannon’s index (H’) and Pielou’s index (J) decreased from the estuary’s upper to middle and then increased from middle to lower reaches, Simpson’s (D) observed the opposite trend and species number (S) gradually increased from the estuary’s upper to lower reaches. For beta diversity, all the indices showed a gradual decrease trend from the estuary’s upper to lower reaches, where also, turnover dominated beta diversity for all seasons. It is noteworthy that the significant roles that nutrients and nutrient ratios played in shaping phytoplankton diversity patterns and the nutrient balance were characterized by excess nitrogen (N) and silicon (Si) and limited phosphorus (P), which could potentially cause diatom blooms. Findings also showed that decreasing Si concentrations can help to reduce overall pollution levels as well as the restoration of the estuary’s ecosystem better than just reducing N alone. Accordingly, this study advocates for the protection of the entire estuary system with particular emphasis on its upper reaches. Moreover, greater attention should also be paid to impacts associated with N input and nutrient ratio trade-offs to the prospective watershed management of this estuary. This study provides a practical approach to explore estuarine diversity in a comprehensive way, which can inform effective biodiversity conservation and also be applied to other marine ecosystems to better guide sustainable management and conservation practices.

show abstract

Harmful Algal Blooms in Chinese Coastal Waters Will Persist Due to Perturbed Nutrient Ratios

Cited by 71 publications

References 44 publications

Transformation processes of biogenic dimethylated sulfur compounds in the northwestern Pacific continental sea

Transformation processes of biogenic dimethylated sulfur compounds in the northwestern Pacific continental sea

Stressing over the Complexities of Multiple Stressors in Marine and Estuarine Systems

Phytoplankton Species Diversity Patterns and Associated Driving Factors in China’s Jiulong River Estuary: Roles That Nutrients and Nutrient Ratios Play

Contact Info

Product

Resources

About