Reproduction, Recruitment and Geographical Distribution of Fucus serratus L. in the Baltic Sea
Reproduction, Recruitment and Geographical Distribution of Fucus serratus L. in the Baltic Sea
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波罗的海锯齿墨角藻的繁殖、补充和地理分布
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发表时间：
2001
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通讯作者：
Roland Engkvist
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作者：
T. Malm;L. Kautsky;Roland Engkvist
本文描述了锯缘墨角藻的大尺度地理分布、种群结构和繁殖季节。在波罗的海。我们还对F.在盐度梯度中对serratus受精卵进行了研究，目的是发现是否发生了对降低盐度的适应。墨角藻被发现是带状形成沿着瑞典东南部的海岸和分散的人口被发现到波罗的海中部适当。非生殖（幼年）植株与生殖（成年）植株的比率从37 ± 8 S显著降低。E.南部为0.4 ± 0.2。在大陆海岸，墨角藻在10月至11月期间繁殖，而厄兰东南海岸的种群在6月至7月期间繁殖。室内试验表明，波罗的海F。锯齿合子从86.9 ± 1.0%的S. E.在9psu时，至5.5 ± 0.5%S。E.在6psu。来自瑞典西海岸的墨角藻受精卵成功受精所需的盐度明显高于波罗的海配子，在8psu时，只有少数卵子受精（5.5 ± 0.5%S。E.）。由于波罗的海F. serratus受精卵萌发在7 psu，（在最北端的人口的盐度），我们讨论了其他因素，如冰刮和富营养化的可能因素限制的地理和垂直分布的物种在波罗的海。
Abstract This paper describes the large-scale geographical distribution, population structure, and reproductive season of the brown algae Fucus serratus L. in the Baltic proper. We have also experimentally tested fertilisation success and germination of F. serratus zygotes in a salinity gradient with the aim of finding out whether an adaptation to reduced salinity has occurred. Fucus serratus was found to be belt-forming along the shores of southeastern Sweden and scattered populations were found up to the middle of the Baltic proper. The ratio of non-reproductive (juvenile) plants per reproductive (adult) plant decreased significantly from 37 ± 8 S. E. in the south to 0.4 ± 0.2 in the north. Fucus serratus was reproductive during October to November on the mainland coast, while the populations on the southeast coast of Öland were reproductive during June to July. Laboratory experiments showed that successful fertilisation of Baltic F. serratus zygotes decreased drastically from 86.9 ± 1.0% S. E. at 9 psu to 5.5 ± 0.5% S. E. at 6 psu. Fucus serratus zygotes from the western coast of Sweden needed a significantly higher salinity for successful fertilisation than the Baltic gametes did, and at 8 psu, only a few eggs were fertilised (5.5 ± 0.5% S. E.). Since a relatively high proportion (35 %) of the Baltic F. serratus zygotes germinated in 7 psu, (the salinity at the northernmost populations) we discuss other factors such as ice-scraping and eutrophication as possible factors limiting the geographical and vertical distribution of the species in the Baltic Sea.