Cryptic freshwater amoeba species in the bottom sediments of Niva Bay (Oresund, Baltic Sea)

被引:12
|
作者
Smirnov, Alexey V.
机构
[1] St Petersburg State Univ, Fac Biol & Soil Sci, Dept Invertebrate Zool, St Petersburg 199034, Russia
[2] Univ Copenhagen, Marine Biol Lab, DK-3000 Helsingor, Denmark
关键词
amoeba; ecology; biodiversity; salinity tolerance; cryptic diversity; GYMNAMOEBAE RHIZOPODA; NAKED AMEBAS; VERTICAL-DISTRIBUTION; CYANOBACTERIAL MATS; COMMUNITY STRUCTURE; CHINCOTEAGUE-BAY; SURFACE WATERS; MARINE AMEBAS; DIVERSITY; SOIL;
D O I
10.1016/j.ejop.2006.11.002
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
An aquarium containing a portion of freshly collected brackish-water sediment from Niva Bay (Oresund, Baltic Sea) was sampled to determine the species of amoebae present and refilled with inorganic salt medium to achieve freshwater salinity. After 2 months incubation, the diversity of amoebae was again studied, and the salinity was restored to the original level. The aquarium was incubated for a further 2 months and the amoeba fauna was studied for the last time. A number of freshwater species appeared in the sample after the first salinity shift, while some marine species disappeared. Most marine species did not re-appear after the salinity in the aquarium was restored, but one marine species not noted previously was recorded. The experiment illustrates the presence of 'cryptic diversity' of amoebae in natural habitats and demonstrates that laboratory manipulation of the salinity of a sample prior to inoculation may achieve an increased recovery of species from a brackish-water habitat. (C) 2007 Elsevier GmbH. All rights reserved.
引用
收藏
页码:87 / 94
页数:8
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