摘要
多齿围沙蚕Perinereis nuntia(Savigny)是一种以沉积有机物为食的底栖多毛类,通常栖居于潮间带中或上区,混有泥砂和石块的底质中。大潮时,底质暴露在空气的时间约为5—11h,作者通过对青岛鲁迅公园附近一个沙-砾石滩的多齿围沙蚕种群的周年调查,推算了它的产量,对该种群的年龄组成、数量变化规律、繁殖期等生态特点也有一定程度的了解。该种群繁殖期从3月延续到8月,5月、6月、7月为繁殖高峰。各月份密度的变化范围在49—3670条/m^2之间,平均为836条/m^2。月平均生物量12.4mg/m^2至18680.6mg/m^2之间,平均值为6682.0mg/m^2。生产量推算时,依虫体长度不同分为20组,分别计算每组虫体在相邻取样间月的生长增量。1989年3月到1990年2月的产量为35.59g/m^2·a。周转率(P/B)为1.62。
A P erinereis nuntia (Polychaeta: Nereidaepopulation inhabiting a cobble-sand beach in Qingdao has been studied over one year to estimate its production. This population reproduces from March to August with a peak in May, June and July. Total numbers vary between 49 and 3670 individuals/m2. Total standing stock(Ash-free dry weight) lies between 12.4 to 18680.6mg/m2, with a mean of 6632.0mg/m2.Production was calculated by determinating the weight-specific growth -rate of the 20 size-classes in each of the 3 year groups. Production (AFDW) in the year Mar., 1989-Feb., 1990 was equal to 35.59 g/m2. P:B ratio was equal to 3.62.
出处
《生态学报》
CAS
CSCD
北大核心
1992年第1期61-67,共7页
Acta Ecologica Sinica
关键词
生产量
多毛纲
围沙蚕
production, polychaeta, P erinereis, P
B ratio.
