NDLI: Long-term changes in the meiobenthos of the eastern part of the Black Sea

Content Provider	Springer Nature Link
Author	Mokievsky, V. O. Vorobjeva, L. V. Garlitska, L. A. Miljutina, M. A. Kucheruk, N. V.
Copyright Year	2010
Abstract	The results of meiobenthic surveys undertaken in 1991, 1999, and 2005 off the Caucasian coasts of the Black Sea are presented. During the period of 1991 to 1999, the number of free-living nematodes increased significantly at all the sampling stations. The mean nematode abundance values grew from 85 ind./10 cm$^{2}$ in 1991 to 1167 ind./10 cm$^{2}$ in 1999. Proportionally, the total metazoan meiofauna density increased from 171 to 1283 ind./10 cm$^{2}$. The abundance of other meiofaunal groups including harpacticoid copepods did not change significantly. As a result of these changes, the ratio of nematodes to copepods (the nematodes-copepods index) increased from 2.5: 1 in 1991 to 26: 1 in 1999 and to 70: 1 in 2005. The number of foraminifers increased twofold. In 1991, they were found only at five stations out of 25. In 1999, foraminifers were presented at all ten stations with a mean density of 212 ind./10 cm$^{2}$. Such changes in the meiobenthic communities could have resulted from cascade transformations of the ecosystem leading to among other changes to a decline in the macrobenthos biomass and the release of nonutilized organic matter in the bottom ecosystems. The differences in the procedures of the sampling and the samples’ processing in the different years may be responsible for the 20–30% variation in the assessment of the meiobenthos’ number.
Starting Page	945
Ending Page	952
Page Count	8
File Format	PDF
ISSN	00014370
Journal	Oceanology
Volume Number	50
Issue Number	6
e-ISSN	15318508
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2010-12-29
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oceanography
Content Type	Text
Resource Type	Article
Subject	Oceanography

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