Collaborative Research: Reproductive Periodicity in Planktonic Sarcodines: Implications for Temporal Variability in Abundance and Flux

合作研究：浮游肉碱的繁殖周期性：对丰度和通量的时间变异性的影响

基本信息

批准号：
9314533
负责人：
David Caron
金额：
$ 27.65万
依托单位：
Woods Hole Oceanographic Institution
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1994
资助国家：
美国
起止时间：
1994-02-15 至 1998-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9314533&HistoricalAwards=false
关键词：
Collaborative Research Reproductive Periodicity Planktonic

项目摘要

9314533 Caron The symbiont-bearing planktonic sarcodines (Acantharia, Radiolaria and Foraminifera) are one of the most conspicuous groups of micro- /macrozooplankton in the surface waters of oceanic communities. They are also one of the least studied for their importance in energy flow, nutrient cycles and vertical fluxes in these environments. Planktonic sarcodines play an important role in the production of organic material by organisms 70 um in oceanic plankton communities (via their intracellular symbiotic algae). Moreover, by virtue of their large size (and consequently their potentially rapid sinking rates) they also play a greater role in the flux of material out of the mixed layer than would be predicted by their overall contribution to planktonic biomass. Previous studies indicate great variability in the surface productivity and flux of sarcodine material out of the mixed layer that may be related to the reproductive periodicities of some species of symbiont-bearing planktonic sarcodines or to episodic events leading to rapid population growth. This project will test this hypothesis, and determine the extent to which these periodicities control the temporal changes in the importance of planktonic sarcodines to primary production in the surface waters of the oligotrophic Atlantic Ocean near Bermuda, and to their flux out of the surface waters at this site. ***

9314533 Caron含有共生型浮游肌菊剂（Acantharia，放射性虫和有孔虫）是海洋群落地表水中最显眼的微型 /Macrozooplankton的群体之一。它们也是这些环境中能源流，营养周期和垂直通量的重要性最少的研究之一。浮游生物在海洋浮游生物群落中（通过其细胞内共生藻类）在有机体的生产中发挥着重要作用。此外，由于它们的尺寸较大（因此它们的潜在下沉速度），它们在混合层的材料中的磁通量中也比其对浮游物质生物质的总体贡献所预测的要大。先前的研究表明，肌无力层的表面生产力和肌酸盐材料的通量差异很大，这可能与某些含有共生体的浮游症状的生殖周期性有关，或者与导致人口迅速增长的情节事件有关。该项目将检验这一假设，并确定这些周期性控制浮游生物肌氨基菌对在百慕大附近寡头大西洋的地表水中产量的重要性的时间变化，并在该地点的地表水中脱离了其磁通量。 ***