返回Google圖書搜尋

The North Sea Fish Community: Past, Present and Future

其他書名	Background Document for the 2011 National Nature Outlook
出版	Wettelijke Onderzoekstaken Natuur & Milieu, 2011
URL	http://books.google.com.hk/books?id=G3MztwAACAAJ&hl=&source=gbs_api

註釋Long-term changes in the North Sea fish community have been demonstrated both as trends in individual species, particular those subject to fishing pressure, as well as in the community as a whole. Trends in diversity, size structure, trophic level and size at maturation have been related to fishing pressure, whilst trends in diversity can also be driven by an increase in water temperature due to climate change. Areas of high diversity often relate to areas where rare species are found (coastal and northern North Sea). Vulnerable species appear mainly along the coast of the UK. The physical environment is a natural driver of the distribution and migrations of fish species, but human impacts through fishing, climate change, offshore construction and shipping can change the natural patterns through direct and indirect effects, making it difficult to predict future changes through multiple interacting impacts.