生物多样性 ›› 2000, Vol. 08 ›› Issue (1): 65-72.
• 论文 •
JINXian-Shi, DENG Jing-Yao
AbstractBased on seasonal bottom trawl surveys from 1959 to 1999 , the variations in fishery resources ,
dominant species composition and community structure were analyzed. The results indicate that the biomass
has continuously declined from 1959. The current biomass account for only 3. 3 % , 7. 3 % and 11. 0 % of that
in 1959 , 1982 and 1992～1993 , respectively. Although dominant species vary in different seasons , the traditional large- sized demersal species , such as largehead hairtail ( Trichiurus haumela) and small yellow croaker
( Pseudosciaena polyactis) , have been replaced by small pelagic species , such as anchovy ( Engraulis japonicus) , half-financhovy ( Setipinna taty ) , gizzard- shad ( Clupanodon punctatus ) , and rednose anchovy
( Thrissa kammalensis) . The community structure has also changed , while species diversity increased from
1959 to 1982 and then decreased continuously.
The disturbance , particularly fishing , may increase the diversity at intermediate intensity , but too high
fishing intensity may lead to diversity decrease. At present , the community structure is simple at un-equilibrium state in the Laizhou Bay , the community succession will continue , and the biomass of small pelagic species
with high resilience may recover and increase if the disturbance is significantly reduced.
金显仕, 邓景耀 (2000) 莱州湾渔业资源群落结构和生物多样性的变化. 生物多样性, 08, 65-72.
JINXian-Shi, DENG Jing-Yao (2000) Variations in community structure of fishery resources and biodiversity in the Laizhou Bay, Shandong. Biodiversity Science, 08, 65-72.
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