Factors causing the limitation of growth of terrestrial algae in maritime Antarctica during late summer
Factors causing the limitation of growth of terrestrial algae in maritime Antarctica during late summer
复制标题
夏末南极海域陆生藻类生长受限的因素
作者：
M. C. Davey;P. Rothery
摘要研究了夏末南极林地土壤微藻群落停止生长和减少的原因。在小围栏内进行了物理和化学修正，并评估了群落的大小和分类组成。大多数处理对微藻群落或单个分类群没有影响。在大多数地点，单独或作为完整生长培养基的一部分向土壤中添加硝酸钙促进了所有分类群的生长。由于土壤中阳离子自然存在过量，因此可以得出结论，夏末微藻群落的生长受到氮的限制。
SummaryThe factors causing the cessation of growth and decline of microalgal communities on Antarctic fell-field soils during late summer were investigated. Physical and chemical amendments were applied within small enclosures and the size and taxonomic composition of the communities assessed. Most treatments had no effect on the microalgal communities or individual taxa. The addition of calcium nitrate to the soil either singly or as part of a complete growth medium promoted growth of all taxa studied on most sites. As the cation was naturally present in excess in the soil it is concluded that growth of the microalgal communities during late summer was nitrogen-limited.