Coastal-Fish Communities along the Northern Coast of the Gulf of Finland, Baltic Sea: Responses to Salinity and Eutrophication
Coastal-Fish Communities along the Northern Coast of the Gulf of Finland, Baltic Sea: Responses to Salinity and Eutrophication
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波罗的海芬兰湾北岸沿岸鱼类群落：对盐度和富营养化的反应
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
J. Rinne
中科院分区：
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作者：
A. Lappalainen;Alexander Shurukhin;G. Alekseev;J. Rinne
芬兰湾是一个狭长的河口海，接收大量的淡水输入和营养负荷，特别是在涅瓦河以东。海湾表层海水盐度从东向西从< 1 ‰增加到6‰，海湾东部盐度较低的地区是富营养化最严重的地区。1998年夏季，在群岛区的五个研究区进行了多目刺网调查。我们的研究结果证实，盐度是一个重要的因素，影响物种丰富度在芬兰湾的北方沿海沃茨，海洋物种逐渐消失的少盐东部地区。然而，来自湖泊的富营养化的常规指标（高总渔获量，高渔获量的鲤科鱼类）并没有显示出更多的和更少的富营养化的沿海地区之间的逻辑差异。海湾东部较高的生产力并没有导致群岛区较高的鱼类生物量。影响鱼类群落的一个潜在因素似乎是一些沿海地区的高捕捞压力。
The Gulf of Finland is an elongated estuarine sea receiving a large freshwater input and nutrient load, especially in the east from the River Neva. The surface water salinity of the gulf increases from < 1 to 6‰ from east to west, and the less haline eastern areas of the gulf are the most eutrophied. Five study areas in the archipelago zone were surveyed with multimesh gill nets in summer 1998. Our results confirmed that salinity is an important factor influencing species richness in the northern coastal waters of the Gulf of Finland, as marine species gradually disappeared towards the less haline eastern areas. However, the conventional indicators of eutrophication derived from lakes (high total catches, high catches of cyprinids) did not show logical differences between more and less eutrophic coastal areas. The higher productivity in the eastern part of the gulf has not led to higher fish biomasses in the archipelago zone. A potential factor affecting fish communities seems to be the high fishing pressure in some coastal areas.