A5039650821- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Marine Biology and Ecology Research
- Aquatic Ecosystems and Phytoplankton Dynamics
- Microplastics and Plastic Pollution
- Isotope Analysis in Ecology
- Plant-based Medicinal Research
- Algal biology and biofuel production
- Marine Bivalve and Aquaculture Studies
- Chemical synthesis and alkaloids
- Methane Hydrates and Related Phenomena
- Protist diversity and phylogeny
- Marine Biology and Environmental Chemistry
- Marine Toxins and Detection Methods
- biodegradable polymer synthesis and properties
University of Hong Kong
2020-2025
Hong Kong University of Science and Technology
2020-2025
Abstract Deciphering the spatiotemporal dynamics and relative competitive advantages of trophic functional traits under multiple stressors has been a long-standing challenge. Here, we integrated core taxa identification with robust simulation modeling to reveal key environmental factors influencing three groups (autotroph, heterotroph, mixotroph), particular focus on mixoplankton. Temporally, mixoplankton exhibited higher proportion in spring winter contrast heterotrophs more uniform spatial...
Abstract The major marine nitrogen‐fixing cyanobacterium, Crocosphaera watsonii , is restricted to warm tropical and subtropical oceans, while the underlying mechanisms remain unclear. C. fixes nitrogen (oxygen‐sensitive) carbon (oxygen‐evolving) during night day, respectively. By diel analyses of physiological rates transcriptome at its optimal (28°C) a lower temperature (23°C), we found that low delayed enhancement respiration (oxygen‐consuming) onset fixation nighttime. Transcription...
In this study, we have for the first time analysed diel microzooplankton grazing selectivity on unicellular cyanobacterial diazotroph (i.e. Crocosphaera watsonii WH8501) and non-diazotrophic microalga Chlorella autotrophica). A mixed diet consisting of these two algae was supplied to 4 species protistan at daytime night-time, respectively. C. fixes nitrogen night-time showed a stronger pattern cellular C:N ratio than autotrophica. All four grazers ingested more in daytime, suggesting became...
Abstract Recent studies have described active nitrogen fixation in high‐latitude waters, but the ecological controls on occurrence or activity of nitrogen‐fixing organisms (diazotrophs) such systems remain unknown. Turnover rates and top‐down are also general knowledge gaps for marine diazotrophs. We detected abundant UCYN‐A (endosymbiotic cyanobacteria) Gulf Anadyr, western Bering Sea, which correlated with high dissolved iron to inorganic ratios (Fe : DIN) due riverine input. Growth...
Abstract Unicellular cyanobacterial diazotrophs (UCDs) are important nitrogen (N) fixers in marine ecosystems. However, the top‐down control on UCDs is poorly understood, especially for microzooplankton grazing that often considered to be dominant loss factor primary production oligotrophic oceans. In this study, we investigated growth and rates of major UCD taxa (UCYN‐A1, UCYN‐A2/3/4, UCYN‐B, UCYN‐C) South China Sea Luzon Strait using a combination dilution experiments quantitative PCR. All...
Abstract The warming ocean is expected to be more phosphorus (P) limited due increasing stratification. P a major limiting nutrient of marine diazotrophs, while the interactive effect temperature elevation and limitation on unicellular diazotrophs unknown. Here, we examined physiology diazotroph, Crocosphaera watsonii , grown under P‐limited P‐replete conditions at 25°C, 28°C, 31°C. Growth, N 2 CO fixation rates C. increased with limitation, growth were similar between treatments At high...
The shift between photoautotrophic and phagotrophic strategies in mixoplankton significantly impacts the planktonic food webs biogeochemical cycling. Considering projected global warming, studying how temperature this is crucial. Here, we combined transcriptome of in-lab cultures (mixotrophic dinoflagellate
Nitrogen (N)-fixing organisms, also known as diazotrophs, play a crucial role in N-limited ecosystems by controlling the production of bioavailable N. The carbon-dominated cold-seep are inherently N-limited, making them hotspots N fixation. However, knowledge diazotrophs is limited compared to other marine ecosystems. In this study, we used multi-omics investigate diversity and catabolism deep-sea bottom waters. Our findings showed that relative abundance bacterial community reached its...