中国农业期刊集成服务平台

当前位置: 首页 > 文章 > 微型生态系统中浮游动物正磷酸盐排泄率的估算水生生物学报 1999,23 (3) 204-210

Position: Home > Articles > ESTIMATION OF ORTHOPHOSPHATE EXCRETION RATE OF ZOOPLANKTON IN FRESHWATER MICROCOSMS Acta Hydrobiologica Sinica 1999,23 (3) 204-210

微型生态系统中浮游动物正磷酸盐排泄率的估算

作者：

阮景荣

单位：

中国科学院水生生物研究所

关键词：

微型生态系统;大型■;PO_4－P排泄率

摘要：

在考查罗非鱼或鲢、鳙下行影响的微型生态系统实验后期，对其唯一的浮游动物──大型的特定正磷酸盐（PO4－P）排泄率按不同大小级别和培育时间进行了测定，同时估算了该浮游动物种群的PO4－P排泄率。结果表明，大型的特定PO4－P排泄率依其体重的增长呈指数式下降，并且随着培育时间的增加而大大降低。有鱼系统中大型种群的PO4－P排泄率及其与浮游植物PO4－P摄取率的比值都显著地小于无鱼系统，而放养罗非鱼或鳙的系统之二项估算值又明显地比鲢单养系统低。看来，大型种群的磷排泄在鲢单养系统的PO4－P再生中起有一定的作用，而在放养罗非鱼或鳙的系统中所起的作用很小。

译名：

ESTIMATION OF ORTHOPHOSPHATE EXCRETION RATE OF ZOOPLANKTON IN FRESHWATER MICROCOSMS

作者：

Ruan Jingrong(Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan 430072)

关键词：

Microcosm, Daphnia magna, PO_4-P excretion rate

摘要：

In the later period of the experiments to investigate the top-down effects of Oreochromis niloticus or Hypophthalmichthys molitrix and Aristichthys nobilis in freshwater microcosms, the specific orthophosphate(PO4-P) excretion rate of Daphnia magna, the sole species of zooplankton in the microcosms, was measured for the different size classes of the animal and in the different incubation time. Moreover, the rate of PO4-P cxcretion (Epz) by D. magna population in the microcosms was estimated with the equation Epz= Espi Bi, where Esp=the spceific PO4-P excretion rate, B=biomass (dry weight), and n=size classes of the animal. The results indicated that the specific PO4-P excretion rate of D. magna decreased exponentially with the increase of individual weight and reduced markedly as incubation time increased. And the rate of PO4-P excretion by D. magna population and its ratio to the rate of PO4-P uptake by phytoplankton in the microcosms stocked with fish were significantly lower than those in the fish-free microcosms, whereas the estimated values of the above indices in the microcosms with Oreochromis niloticus or Aristichthys nobilis were obviously smaller than those in the microcosms containing Hypophthalmichthys molitrix alone. It appears that phosphorus excretion by D. magna population have made some contributions to PO4-P regeneration in the microcosms stocked with Hypophthalmichthys molitrix alone but contributed inconsiderably to the recycling of phosphorus in the microcosms with Oreochromis niloticus or Aristichthys nobilis under the given experimental conditions.

相似文章

微型生态系统中正磷酸直的周转时间的估算 [阮景荣] 水生生物学报 1999,023 (1) 47-52
罗非鱼对微型生态系统营养物水平的影响 [阮景荣, 刘衢霞, 王少梅, 戎克文] 应用生态学报 1993,4 (4) 404-409
罗非鱼对微型生态系统浮游生物群落和初级生产力的影响 [阮景荣, 戎克文, 王少梅, 刘衢霞] 应用生态学报 1993,4 (1) 65-73
有机-无机态肥氮在微型农业生态系统的转移和循环研究 [吴珊眉, 倪苗娟] 应用生态学报 1990,1 (1) 67-74
微型生态系统中正磷酸盐的周转时间的估算 [阮景荣] 水生生物学报 1999,23 (1) 47-52
三种鱼的磷排泄及其在微型生态系统磷再循环中的作用 [阮景荣] 水生生物学报 2005,29 (1) 55-60
有机―无机态肥氮在微型农业生态系统的转循环研究 [吴珊眉, 倪苗娟] 应用生态学报 1990,001 (1) 67-74

导出引用

计量

文章访问数: 22

HTML全文浏览量: 0

PDF下载量: 0

微型生态系统中浮游动物正磷酸盐排泄率的估算

相似文章

所属期刊

水生生物学报

推荐期刊

应用生态学报

水生生物学报