文章基本信息

标题：Ecological consequences of biological invasions: three invertebrate case studies in the north-eastern Baltic Sea
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作者：Jonne Kotta ; Ilmar Kotta ; Mart Simm 等
期刊名称：Helgoland Marine Research
印刷版ISSN：1438-3888
出版年度：2006
卷号：60
期号：2
页码：106-112
DOI：10.1007/s10152-006-0027-6
出版社：BioMed Central
摘要：Population dynamics and ecological impacts of the cirriped Balanus improvisus, the polychaete Marenzelleria neglecta and the cladoceran Cercopagis pengoi were investigated in the north-eastern Baltic Sea. After an increase during the first decade of invasion, the density of M. neglecta and C. pengoi declined afterwards. The studied abiotic environmental variables did not explain the interannual variability in the seasonal cycles of M. neglecta and C. pengoi indicating that the species are at their initial phase of invasion. The population dynamics of B. improvisus was best described by water temperature. B. improvisus promoted the growth of the green alga Enteromorpha intestinalis. M. neglecta enhanced the content of sediment chlorophyll a and reduced growth and survival of the polychaete Hediste diversicolor and growth of the amphipod Monoporeia affinis. Concurrent with the invasion of C. pengoi the abundance of small-sized cladocerans declined, especially above the thermocline. C. pengoi had become an important food for nine-spined stickleback, bleak, herring and smelt.
关键词：Baltic Sea;Benthic and pelagic systems;Ecological impact;Nonindigenous species;Interspecific interaction