| |
| |
|
|
|
|
| |
 |
General Marine Environmental Science
|
| |
|
|
Eukaryotic plankton diversity in northern South China Sea
P-GS-05-S
Tangcheng Li* , Xiamen University
Guilin Liu, BGI
Jianwei Chen, BGI
Cong Wang, Xiamen university
Xin Lin, Xiamen University
Senjie Lin, Xiamen University& University of Connecticut
Presenter Email: 820195402&qq.com |
|
The protists in marine ecosystem play fundamental ecological roles as producers, consumers, decomposers, and trophic links in aquatic food webs. These links are essential for the biogeochemical processes in the ocean, e.g. plankton communities fix CO2 and other elements into organic matter that lead to the transport of carbon to the deep ocean. Some protists regime shift has been regarded as the indicator of environmental factors change or even the climate change. In this work, we chose two stations (C6 & C9) to sample at different water-column depths and different size fractions and different sampling times to analysis the 18S ribosomal DNA. We have retrieved 2491 operational taxonomic units (OTUs) from all the samples, about 99% of which was assigned to known eight eukaryotic supergroups (Alveolata, Amoebozoa, Archaeplastida, Excavata, Incertae_Sedis, Opisthokonta, Rhizaria, Stramenopiles). After we divide OTUs into abundance OTUs and rare OTUs based on previous report, we found the first degree of segregation is size fraction in total OTUs and abundance OTUs while the water-column depths is the first degree of segregation in rare OTUs. And the result of diversity statistic analysis to abundance OTUs and rare OTUs in different water-column depths and different sampling times revealed that the abundance OTUs was distributed widely than rare OTUs and change significantly over time. This all indicated the different assembly mechanisms to shape abundance OTUs and rare OTUs in different water-column depths. The Biodiversity linkages to environmental conditions and biotic factors are still being analyzed.
|
|
|
|
|
|
|
|
|