Spatial and temporal changes in nematode assemblages inhabiting a seagrass biotope in the Tien Yen River estuary, Quang Ninh Province, Vietnam
Pavlyuk, O.N.; Trebukhova, Y.A.; Mordukhovich, V.V.; Zograf, J.K.; Yushin, V.V.; Tu, N.D.; Thanh, N.V.; Luong, C.V. (2020). Spatial and temporal changes in nematode assemblages inhabiting a seagrass biotope in the Tien Yen River estuary, Quang Ninh Province, Vietnam. Rus. J. Nematol. 28(1): 53-70
In: Russian Journal of Nematology. Russian Academy of Sciences. Institute of Parasitology: Moscow. ISSN 0869-6918, meer
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| Author keywords |
environmental conditions, intertidal, meiofauna, rainfalls, seasonal changes |
| Auteurs | | Top |
- Pavlyuk, O.N.
- Trebukhova, Y.A.
- Mordukhovich, V.V.
- Zograf, J.K.
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- Yushin, V.V.
- Tu, N.D.
- Thanh, N.V.
- Luong, C.V.
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| Abstract |
The seasonal changes in density, species biodiversity and trophic groups of free-living marine nematodes forming assemblages in tropical seagrass meadows have been studied in the Tien Yen River estuary (Gulf of Tonkin, South China Sea). Significant variations of the features of the nematode communities in the horizontal scale and in time were found. In the rainy season (October), the nematode density noticeably decreased, and the species composition and dominant species, as well as such parameters of assemblages as diversity and structure, changed as compared to April. A total of 71 nematode species were recorded from the studied area but only four species have been found at all stations in both seasons. The reasons for this are the high spatial heterogeneity of environmental conditions and their pronounced seasonal variations. Environmental conditions (granulometric composition of the bottom sediments, water temperature and salinity) were characterised by pronounced differences between stations as well as seasons. The precipitation (heavy rainfalls) in the intertidal zone of the estuary is the main factor responsible for seasonal changes of nematode assemblages. |
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