在10月23日《科學(xué)》雜志的Brevium中,，William Li及其同僚報告說，由氣候所驅(qū)動的北冰洋的變化正在從該區(qū)域的較小型的海洋藻類中制造出"生態(tài)學(xué)上的優(yōu)勝者",。研究人員說,，如果這種極細(xì)小的浮游生物的優(yōu)勢持續(xù)存在的話，它可能會對海洋生態(tài)系統(tǒng)的碳捕獲和截留的形式產(chǎn)生顯著的影響,。較暖和的溫度,、降水量的增加、更大量的冰融化及溢流都會產(chǎn)生更為淡化的營養(yǎng)不如深水區(qū)豐富的北極表層水,。Picoplankton [或譯：超微型浮游生物（其直徑不到2微米）] 的表面積相對于容量的高比例使其在從上層水域中獲取食物時比那些較大的浮游生物更有優(yōu)勢,。結(jié)果，自2004年以來,，小型藻類開始增加,，而某些較大型的海藻種群數(shù)則發(fā)生縮減。（生物谷Bioon.com）
生物谷推薦原始出處：
Science 23 October 2009:DOI: 10.1126/science.1179798
Smallest Algae Thrive As the Arctic Ocean Freshens
William K. W. Li,1,* Fiona A. McLaughlin,2 Connie Lovejoy,3 Eddy C. Carmack2
As climate changes and the upper Arctic Ocean receives more heat and fresh water, it becomes more difficult for mixing processes to deliver nutrients from depth to the surface for phytoplankton growth. Competitive advantage will presumably accrue to small cells because they are more effective in acquiring nutrients and less susceptible to gravitational settling than large cells. Since 2004, we have discerned an increase in the smallest algae and bacteria along with a concomitant decrease in somewhat larger algae. If this trend toward a community of smaller cells is sustained, it may lead to reduced biological production at higher trophic levels.
1 Fisheries and Oceans Canada, Bedford Institute of Oceanography, Dartmouth, NS B2Y 4A2, Canada.
2 Fisheries and Oceans Canada, Institute of Ocean Sciences, Sidney, BC V8L 4B2, Canada.
3 Département de Biologie, Québec-Océan and Institut de biologie intégrative et des systèmes, Université Laval, QC G1V 0A6, Canada.
