Golovatch S.I.,RAS A.N. Severtsov Institute of Ecology and Evolution |
Semenyuk I.I.,RAS A.N. Severtsov Institute of Ecology and Evolution |
VandenSpiegel D.,Musee Royal de lAfrique Centrale |
Anichkin A.E.,Russian Vietnamese Tropical Center
Arthropoda Selecta | Year: 2011
Three new species of Pyrgodesmidae are being described from a small nature reserve supporting a seasonal tropical forest in southern Vietnam: Pseudocatapyrgodesmus pulcher sp.n., Skotodesmus vietnamicus sp.n., both representing only the second species in their respective genera, and Cryptocorypha hoffmani sp.n., an 11th species in this basically Oriental genus. These new species differ from their respective congeners chiefly in certain minor details of gonopod structure, to a lesser degree through a few peripheral characters as well. © arthropoda selecta, 2011.
Kharchenko U.V.,RAS Institute of Chemistry |
Beleneva I.A.,RAS A.V. Zhirmunsky Institute of Marine Biology |
Kovalchuk Y.L.,RAS Severtsov Institute of Ecology |
Hiep L.T.M.,Russian Vietnamese Tropical Center
Russian Journal of Marine Biology | Year: 2013
The ecotoxicological effect of heavy metals on the dehydrogenase and catalase activities of marine heterotrophic bacteria was assessed in pure strains and in associations. The microorganisms from the surfaces of copper-containing materials had higher levels of enzyme activities and were inhibited by trace metals to a lesser degree. The data from the field and laboratory experiments suggest that catalase activity can provide an ecological indicator of the effects of heavy metals on the aquatic environment. © 2013 Pleiades Publishing, Ltd.
Mokievsky V.O.,Russian Academy of Sciences |
Tchesunov A.V.,Moscow State University |
Udalov A.A.,Russian Academy of Sciences |
Toan N.D.,Russian Vietnamese Tropical Center
Russian Journal of Marine Biology | Year: 2011
Meiobenthic studies were performed in an intertidal area in the Be River estuary (Nha Trang Bay, Vietnam). The study area is an area of riverine-type mangroves that have been heavily damaged by human impacts, including timber cutting and waste. Three biotopes are situated in the middle intertidal zone: a fringe of Rhizophora stylosa, a bush area composed of Avicennia aff. alba behind it, and muddy sand with fiddler crabs (Uca spp.), which is free of mangrove plants. Three replicate samples of meiobenthos were collected in each biotope and each sample was subdivided into two layers: 0-1 and 1-4 cm. The abundance of metazoan meiobenthos varied from 735 specimens/10 cm 2 in the Uca spp. biotope to 244 specimens/10 cm 2 beneath the Rhizophora trees. Six taxonomic groups of high rank were found among the meiofauna: Nematoda, Copepoda (Harpacticoida), Oligochaeta, Turbellaria, Kinorhyncha, and Foraminifera (Allogromiida). The spatial variability of meiobenthos and its key taxa was estimated and the spatial distribution patterns of free-living nematode species were described. About 90% of the total meiobenthos inhabited the upper 0-1 cm of the sediments. Nematodes constituted 90-95% of all meiobenthic organisms in the samples. A total of 48 species of free-living nematodes were found in the investigated mangrove intertidal area. In terms of species composition and set of dominants, the nematode community is comprised of three local assemblages: one of them inhabits the uppermost centimeter in the Uca and Avicennia biocenoses; the second assemblage occupies the upper sediment layer in the Rhizophora stand; a less abundant but specific assemblage of several nematode species occurs in the subsurface sediments at all three sites. © 2011 Pleiades Publishing, Ltd.
Monastyrskii A.L.,Russian Vietnamese Tropical Center
Entomological Review | Year: 2010
The following types of ranges of the Vietnamese butterflies are considered: 1) narrow ranges of endemic taxa, 2) continuous and mosaic ranges, 3) disjunct ranges, and 4) vicariant ranges. The endemic butterfly taxa mostly concentrate in isolated mountain areas of central Vietnam and show relationships with the Sino- Himalayan, Malayan, and local Indo-Burmese faunas. The ranges of most Vietnamese butterflies, both eury- and stenobiont species, combine the traits of continuous and mosaic distribution. Disjunctions in the ranges of Vietnamese butterflies vary from dozens to thousands kilometers. Similar habitats in different parts of Vietnam may have different though allied butterfly species. The origin of the recent butterfly fauna is hypothesized. © Pleiades Publishing, Inc., 2010.