Heterotrophy on ultraplankton communities is an important source of nitrogen for a sponge–rhodophyte symbiosis
Heterotrophy on ultraplankton communities is an important source of nitrogen for a sponge–rhodophyte symbiosis
复制标题
超浮游生物群落的异养是海绵-红藻共生的重要氮源
DOI：
10.1242/jeb.00698
复制
发表时间：
2003
影响因子：
2.8
通讯作者：
M. Borowitzka
中科院分区：
文献类型：
--
作者：
A. Pile;A. Grant;R. Hinde;M. Borowitzka
无脊椎/藻类共生群落的海绵伴侣对超浮游生物的放牧可以提供足够的颗粒有机氮来支持双方的氮需求。以前不为人知的海藻类-角藻藻群落的天然食物是由细菌和原生动物组成的，它们是丰富的氮源。超浮游生物的滞留量随季节和时间的变化而变化。冬季对氮的吸收比夏季多一个数量级。每个季节的时间也会影响浮游生物的数量。夏季夜间滞留率较高，冬季滞留率相反。总的来说，Haliclona-Ceratodictyon群落能够通过放牧自然存在的水柱群落来满足其代谢氮需求。
SUMMARY Grazing on ultraplankton by the sponge partner of an invertebrate/algal symbiotic association can provide enough particulate organic nitrogen to support the nitrogen needs of both partners. The previously unknown natural diet of the sponge in the Haliclona–Ceratodictyon association consists of bacteria and protozoans, which are rich sources of nitrogen. Retention of ultraplankton varied with season and time of day. During the winter there was an order of magnitude more nitrogen taken up than in summer. Time of day during each season also affected the amount of ultraplankton retained. In summer retention was higher at night whereas the opposite was true during winter. Overall, the Haliclona–Ceratodictyon association is able to meet its metabolic nitrogen demands through grazing on the naturally occurring water column community.