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Nutrient limitation in Ellis Fjord, eastern Antarctica

journal contribution
posted on 2023-05-16, 09:51 authored by Andrew McMinnAndrew McMinn, Gibson, JAE, Hodgson, DA, Ashman, J
The occurrence of high chlorophyll-a concentrations (up to 11.6μgl-1) at shallow depths within Ellis Fjord, eastern Antarctica, during spring and summer, coincided with the development of a stratified water column. Macronutrient concentrations during periods of high chlorophyll-a levels were very low. Phosphate concentrations decreased to 0.2 μM, nitrate to 0.4 μM and silicate to 3.9 μM. High rates of nutrient depletion early in the season can be explained by strong sea-ice algal mat development. An Si:N:P uptake ratio of 25.5:13.8:1 indicates a strong demand for silicate. Minimum silicate levels were below those necessary for maximum diatom growth and probably contributed to the successional shift from diatoms to phytoflagellates. © 1995 Springer-Verlag.

History

Publication title

Polar Biology

Volume

15

Issue

4

Pagination

269-276

ISSN

0722-4060

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer-Verlag

Place of publication

Berlin, Germany

Repository Status

  • Restricted

Socio-economic Objectives

Natural hazards not elsewhere classified

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