江苏小庙洪牡蛎礁大型底栖动物多样性及群落结构   总被引：1，自引：1，他引：0  

全为民  安传光  马春艳  黄厚见  成伟  王云龙  沈新强  陈亚瞿 《海洋与湖沼》2012,43(5):992-1000

基于2011年春季的生态调查资料,报道了江苏小庙洪自然潮间带牡蛎礁大型底栖动物的多样性及其群落结构。通过16SrDNA基因序列分析发现,在小庙洪牡蛎礁内分布有3种牡蛎(熊本牡蛎Crassostrea sikamea、近江牡蛎C.ariakensis和密鳞牡蛎Ostrea denselamellosa),其中分布于潮间带区的造礁活体牡蛎为熊本牡蛎,其平均密度和生物量分别为(2199±363)ind/m2和(12361±1645)g/m2。在该牡蛎礁内记录到定居性大型底栖动物(不包括3种牡蛎)共计43科66种,礁体大型底栖动物的总栖息密度和生物量分别达到(2830±182)ind/m2和(499.59±35.41)g/m2,显著高于邻近的软相潮间带泥(沙)质滩涂[密度(102±29)ind/m2;生物量(53.10±22.80)g/m2]和潮下带泥滩[密度(140±60)ind/m2;生物量(43.23±22.37)g/m2](P<0.001)。  相似文献   

Stable isotopes in aquatic food web of an artificial lagoon in the Hangzhou Bay, China   总被引：1，自引：0，他引：1  

全为民  施利燕  陈亚瞿 《中国海洋湖沼学报》2010,28(3):489-497

Stable isotope values, δ¹³C and δ¹⁵N, were determined for four primary producers and 19 dominant consumers in a small artificial lagoon located in Hangzhou Bay. Based on these results the major pathways for energy flow and trophic structure of the artificial lagoon ecosystem were characterized. The mean δ¹³C values for the 19 consumers ranged from −22.99‰ to −14.24‰. Apart from so-iny mullet Liza haematocheila, the other 18 consumers had intermediate δ¹³C values between those of epibenthic microalgae and particulate organic matter (POM). The results of a multiple source linear mixing model (IsoSource model) indicated that 50% or more of the organic carbon in the tissues of most consumers was derived from epibenthic microalgae. This indicated that these primary producers were the main food source fueling the lagoon food web. The mean δ¹⁵N values for the 19 consumers varied between 4.93‰ and 12.97‰ and indicated four trophic levels in the lagoon. Four macroinvertebrates and zooplankton represented the primary consumers, whilst the other 14 consumers occupied the secondary and tertiary consumer levels. The 19 consumers were divided into three trophic guilds (detritivores/suspension feeders, omnivores and carnivores).  相似文献   

南黄海昨晨地震 本市近期内不会发生破坏性地震     

瞿颁 《山西地震》1987,(1)

据上海市地震局地震台网测定,昨天晨4点25分42秒,在东经121.5°度,北纬32.4°度的南黄海海域,发生里氏4.7级地震.本市虹口、杨浦、吴凇、宝山、崇明等十多个区、县均有不同程度的震感.据地震局领导同志介绍,上海在短时期内没有明显的迹象表明有发生破坏性地震的可能.据地震局综合各方面资料后判断,自  相似文献