Nutrient limitation of the primary production of phytoplankton in Lake Baikal

Yasuhiro Satoh, Toshiya Katano, Takeshi Satoh, Osamu Mitamura, Kaori Anbutsu, Shin Ichi Nakano, Hiroyuki Ueno, Masaki Kihira, Valentin Drucker, Yuji Tanaka, Tetsuro Mimura, Yasunori Watanabe, Masahito Sugiyama

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Nutrient limitation of the primary production of phytoplankton at some stations in southern and central Lake Baikal was studied by nutrient enrichment experiments in August 2002. Chlorophyll (Chl.) a concentrations ranged from 0.7 to 5.8μgl-1. Inorganic nutrient concentrations were low: soluble reactive phosphorus ranged from 0.05 to 0.20μmoll-1, ammonia from 0.21 to 0.41μmoll-1, and nitrite plus nitrate from 0.33 to 0.37μmoll-1. In the five enrichment experiments, phosphate spikes and phosphate plus nitrate spikes always stimulated primary production. Nitrate spikes also stimulated primary production in four of the experiments. Significant differences were detected between the controls and phosphate spikes and between the controls and phosphate plus nitrate spikes. Thus, the first limiting nutrient is thought to be phosphorus, but once phosphorus is supplied to the surface water, the limiting nutrient will quickly shift from phosphorus to nitrogen.

Original languageEnglish
Pages (from-to)225-229
Number of pages5
JournalLimnology
Volume7
Issue number3
DOIs
Publication statusPublished - 2006 Dec

All Science Journal Classification (ASJC) codes

  • Ecology
  • Aquatic Science
  • Water Science and Technology

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