Spatial distribution of planktonic ciliates in the western Pacific Ocean: Along the transect from Shenzhen (China) to Pohnpei (Micronesia)
Credit: Marine Life Science & Technology
Announcing a new publication for Marine Life Science & Technology journal. In this research article the authors Hungchia Huang, Jinpeng Yang, Shixiang Huang, Bowei Gu, Ying Wang, Lei Wang and Nianzhi Jiao from Xiamen University, Xiamen, China and Sun Yat-Sen University, Guangzhou, China consider the spatial distribution of planktonic ciliates in the western Pacific Ocea: along a transect from Shenzhen (China) to Pohnpei (Micronesia).
Planktonic ciliates have been recognized as major consumers of nano- and picoplankton in pelagic ecosystems, playing pivotal roles in the transfer of matter and energy in the microbial loop. However, due to the difficulties in identification, the species composition of ciliate assemblages, especially for the small, fragile, and naked species that usually dominate the ciliate communities in the oceanic waters, remains largely unknown.
The authors sampled 22 stations along the transect from Shenzhen (China) to Pohnpei (Micronesia) for the enumeration of picoplankton and nanoflagellates. In addition, pigment analysis of major phytoplankton groups along with the measurements of environmental variables including temperature, salinity, and nutrients were also carried out. Ciliates were identified at species level using quantitative protargol stain to reveal the species composition and their distribution patterns from offshore to open ocean. Ciliate abundance was positively correlated with phosphate, silicate, and pico-sized pigmented eukaryotes (PPEs), whereas the biomass was closely related with PPEs, heterotrophic nanoflagellates, and chlorophytes. The ciliate communities were separated into four groups showing a nearshore to open ocean trend.
The authors identified the combination of silicate and pigmented nanoflagellates as the major factor driving the ciliate community composition. This close relationship between silicate and ciliate abundance and community structure needs further validation based on more data collected from oceanic waters. The study demonstrates the necessity of using techniques that can reveal the community composition at higher taxonomic resolutions in future studies on ciliates.
Article reference: Hungchia Huang, Jinpeng Yang, Shixiang Huang, Bowei Gu, Ying Wang, Lei Wang, Nianzhi Jiao, Spatial distribution of planktonic ciliates in the western Pacific Ocean: along the transect from Shenzhen (China) to Pohnpei (Micronesia), Marine Life Science & Technology, 2020, ISSN 2662-1746, https:/
Keywords: Community structure, Distribution pattern, Diversity, Nanoflagellates, Quantitative protargol stain
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