Discrimination between the influences of river discharge and coastal upwelling on summer microphytoplankton phosphorus stress in the East China Sea

Liu, Hung‐Chun; Shih, Chi-Yu; Gong, Gwo‐Ching; Ho, Tung‐Yuan; Shiah, Fuh‐Kwo; Hsieh, Chih‐hao; Chang, Jeng Kuei

doi:10.1016/j.csr.2013.04.017

Cited by 15 publications

(6 citation statements)

References 39 publications

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“…The intense competition for nutrients between the bacteria and phytoplankton causes a negative effect on phytoplankton growth (Joint et al ., ; Aharonovich and Sher, ). In our study, the phosphate concentration in the late‐blooming phase increased greatly compared to the middle‐blooming phase, but it still limited phytoplankton growth (Liu et al ., ). Transcripts of phosphate ABC transporter and alkaline phosphatase were also detected in the in situ P. donghaiense blooming cells (our unpublished data).…”

Section: Discussionmentioning

confidence: 97%

Metaproteomics reveals major microbial players and their metabolic activities during the blooming period of a marine dinoflagellateProrocentrum donghaiense

Zhang

Chen

et al. 2017

Environmental Microbiology

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Interactions between bacteria and phytoplankton during bloom events are essential for both partners, which impacts their physiology, alters ambient chemistry and shapes ecosystem diversity. Here, we investigated the community structure and metabolic activities of free-living bacterioplankton in different blooming phases of a dinoflagellate Prorocentrum donghaiense using a metaproteomic approach. The Fibrobacteres-Chlorobi-Bacteroidetes group, Rhodobacteraceae, SAR11 and SAR86 clades contributed largely to the bacterial community in the middle-blooming phase while the Pseudoalteromonadaceae exclusively dominated in the late-blooming phase. Transporters and membrane proteins, especially TonB-dependent receptors were highly abundant in both blooming phases. Proteins involved in carbon metabolism, energy metabolism and stress response were frequently detected in the middle-blooming phase while proteins participating in proteolysis and central carbon metabolism were abundant in the late-blooming phase. Beta-glucosidase with putative algicidal capability was identified from the Pseudoalteromonadaceae only in the late-blooming phase, suggesting an active role of this group in lysing P. donghaiense cells. Our results indicated that diverse substrate utilization strategies and different capabilities for environmental adaptation among bacteria shaped their distinct niches in different bloom phases, and certain bacterial species from the Pseudoalteromonadaceae might be crucial for the termination of a dinoflagellate bloom.

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Section: Discussionmentioning

confidence: 97%

Metaproteomics reveals major microbial players and their metabolic activities during the blooming period of a marine dinoflagellateProrocentrum donghaiense

Zhang

Chen

et al. 2017

Environmental Microbiology

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“…Further, the coastal upwelling that appears in the region centered around 122°45’E, 30°00’N and 122°20’E, 28°50’N (Jing et al, 2007), with contributions from Taiwan Warm Current, Kuroshio, and its other branch current, carries a high nutrient that boosts marine productivity (Xing et al, 2016). This suggests that the phytoplankton productivity in the ZFCMA was controlled by the nutrient inputs from coastal upwelling besides those from Yangtze River or other local rivers (Duan et al, 2014; Gao and Wang, 2008; Liu et al, 2013; Xing et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Phytoplankton productivity and community structure variations over the last 160 years in the East China Sea coast in response to natural and human-induced environmental changes

Chen

Liu

et al. 2019

The Holocene

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Eutrophication has caused drastic changes to the marine ecosystem of the East China Sea during the past decades. However, there is relatively sparse evidence of historical changes, as well as the explicit effects of climatic changes and anthropogenic activities on the primary productivity of marine coastal ecosystems. In this study, surface and core sediments from the Zhejiang-Fujian coastal mud area, East China Sea coast, were analyzed using the bulk and molecular biomarkers. The results showed that ecosystem changes were characterized by increased phytoplankton productivity and a fluctuant transition from blooms mostly dominated by diatoms to red tide events dominated by dinoflagellates. Variations from the early 1850s to the early 2010s can be divided into a nature-dominated period (the early 1850s–1960s) and a human-impacted period (1960s–the early 2010s). Particularly, natural forcing such as heavy floods (e.g. 1998, 1954, and 1931) in the whole of the Yangtze River catchment, variations in the intensity of East Asia Monsoon, and strengthened or weakened Kuroshio intrusion/positive or negative Pacific Decadal Oscillation phase in the coastal mud area have substantially affected the phytoplankton productivity and community structure during the nature-dominated period. In contrast, changes in nutrient supply and compositions were more apparent during the human-impacted period, which could have been because of increased fertilizer usage, discharges of industrial wastewater and domestic sewage, and large-scale human projects (e.g. Danjiangkou Reservoir and Three Gorges Dam) in the Yangtze River drainage area, leading to significant phytoplankton productivity and community structure variations in the coastal mud area system of East China Sea.

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“…Subsequently, the phosphorus-rich water is transported northeastward by the TWWC, forming a high chlorophyll tongue off the coast of Zhejiang (Yang et al, 2013). Therefore, it can be inferred that phytoplankton production in the Zhejiang coastal area is modulated by the nutrients derived from both the Changjiang diluted water and coastal upwelling (Chen et al, 2004; Liu et al, 2013). Long term observation from 1962 to 1993 in the PN line of the ECS (PN line from 27°30′N, 128°15′E to 30°00′N, 124°30′E) revealed that the transport volume of the Kuroshio Current fluctuated with low values from 1960 to the 1970s, followed by a significant increasing trend (Wooster and Zhang, 2004; Zhang et al, 2000) (Figure 7f, green line).…”

Section: Discussionmentioning

confidence: 99%

Ecosystem responses to anthropogenic and natural forcing over the last 100 years in the coastal areas of the East China Sea

et al. 2016

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Ecosystem changes of the coastal areas of the East China Sea (ECS) during the past 30 years have been characterized by increased productivity and increased occurrences of dinoflagellate red tides; both were commonly attributed to be caused by anthropogenic input of nutrients. However, climate-driven regime shifts were found in the Pacific, but they have not been observed in the ECS owing to the lack of continuous high resolution data. Hence, it is still a challenge to distinguish the influences of anthropogenic activities and climate changes on ECS shelf ecosystem. We compare phytoplankton biomarker (brassicasterol, dinosterol, and alkenones) data of five box cores from the coastal area of the ECS, which afford phytoplankton productivity and community structure records at decadal-scale resolution for the last 100 years. Phytoplankton productivity in all cores increased during the past 50 years, but community structure changes showed different trends. Relative diatom contribution revealed a decreasing trend during the past ca. 50 years in cores DH5-1 and CJ43 collected near the Changjiang Estuary, which were likely caused by increased N/Si and N/P ratios, providing conditions more favorable for dinoflagellates growth. In contrast, the relative diatom contribution increased in cores 32, 34, and DH6-3 further away and south of the Changjiang Estuary, suggesting limited influence of the Changjiang water. Instead, diatom increasing trend is likely caused by increased supply of phosphorus and silicate, as a result of larger Kuroshio intrusion flux and the corresponding strengthened coastal upwelling. Therefore, both anthropogenic activities and climate-driven coastal upwelling have contributed to increased productivities, but these two forcing mechanisms have resulted in contrasting community structure changes at different sites in the coastal area of the ECS.

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Discrimination between the influences of river discharge and coastal upwelling on summer microphytoplankton phosphorus stress in the East China Sea

Cited by 15 publications

References 39 publications

Metaproteomics reveals major microbial players and their metabolic activities during the blooming period of a marine dinoflagellateProrocentrum donghaiense

Metaproteomics reveals major microbial players and their metabolic activities during the blooming period of a marine dinoflagellateProrocentrum donghaiense

Phytoplankton productivity and community structure variations over the last 160 years in the East China Sea coast in response to natural and human-induced environmental changes

Ecosystem responses to anthropogenic and natural forcing over the last 100 years in the coastal areas of the East China Sea

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