Seasonal and Interannual Variations in Biomass and Abundance of Megabenthos in Ise Bay, Central Japan
Seasonal and Interannual Variations in Biomass and Abundance of Megabenthos in Ise Bay, Central Japan
复制标题
日本中部伊势湾生物量和巨型底栖动物丰度的季节和年际变化
DOI：
10.5179/benthos1996.58.1_75
复制
发表时间：
2003
影响因子：
2.4
通讯作者：
H. Sekiguchi
中科院分区：
文献类型：
--
作者：
T. Narita;Moazzem Hossain;H. Sekiguchi
在日本中部的伊势湾，由于近年来富营养化的影响，每年夏季至秋季，湾底附近都会出现贫氧水体。本文研究了该湾大型底栖动物的丰度、生物量和分布的季节和年际变化，以探讨这种贫氧水体对大型底栖动物的影响。在温暖时期，当贫氧水形成时，优势种空间分布的季节变化与贫氧水体的发展密切相关，大型底栖动物中的优势类群1996 ~ 1998年，各优势类群的优势种和优势种数量发生了显著变化，甲壳类的优势种数量从1996 ~ 1998年的100种增加到1998年的100种，优势种数量从1996 ~ 1998年的100种增加到1998年的100种1993 ~ 1994年的优势种（美洲隆背蟹、口虾蛄和双斑？）与1993 ~ 1994年的优势种（美洲隆背蟹、口虾蛄和双斑？）这种变化可能与每个优势类群或物种的产卵和幼虫招募事件与海湾贫氧水的发展和溶解的匹配/不匹配有关。
Due to recent eutrophication,oxygen-poor water develops annually near the bottom of Ise Bay, central Japan,in summer to autumn.This study examined seasonal and interannual variations in the abun dance,biomass and distribution f megabenthos in the bay over a7-year period to see if they were affected by this oxygen-poor water.The biomass of megabenthos,as well as the abundance/biomass of the dominant megabenthos species,drastically decreased during warm periods when oxygen-poor water developed,and in creased from autumn to spring of the following year when oxygen-poor water no longer occurred.Seasonal variations in the spatial distributions of dominant species changed closely with the development of oxygenpoor water.The dominant taxa among the megabenthos(mainly echinoderms and crustaceans)and the dominant species within each dominant taxon changed drastically during the study.For crustaceans,the dominant species from1996to1998(Paradorippe granulata and Cancer gibbosulus)differed greatly from those dominant from1993to1994(Carcinoplax vestita,Oratosquilla oratoria and Charybdis bimaculata). This change may have been related to the matching/mismatching of spawning and larval recruitment events of each dominant taxon or species with the development and dissolution of oxygen-poor water in the bay.