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Oecologia. 2001 Nov;129(3):395-406. doi: 10.1007/s004420100730. Epub 2001 Nov 01.

Trophic functioning and nutrient flux in a highly productive tropical lagoon.

Oecologia

Hsing-Juh Lin, Jia-Jang Hung, Kwang-Tsao Shao, Fancy Kuo

Affiliations

  1. Department of Botany, National Chung Hsing University, Taichung, Taiwan 402, Republic of China.
  2. Institute of Marine Geology and Chemistry, National Sun Yat-Sen University, Kaohsiung, Taiwan 804, Republic of China.
  3. Institute of Zoology, Academia Sinica, Taipei, Taiwan 115, Republic of China.

PMID: 28547195 DOI: 10.1007/s004420100730

Abstract

Chiku Lagoon is a highly productive tropical lagoon with high fishery yields. Trophic networks and stoichiometrically linked water-salt-nutrient budgets were constructed to relate the functioning of the food web to nonconservative behavior of nutrients in the lagoon. Network analysis showed that the lagoon is more dependent on phytoplankton than detritus and periphyton to generate food sources for consumers. Nevertheless, detritivory is more important than herbivory in the food web. Transfer efficiency is high at low trophic levels, but declines at higher levels due to the high fishery pressure. Thus, only a small fraction of organic matter (15%) is recycled, and this all through detrital pathways, most of which involve only two compartments. Summation of individual rate measurements for primary production and respiration yielded an estimate of +249 g C m

Keywords: Autotrophic system; Chiku Lagoon; Net system metabolism; Network analysis; Stoichiometrically linked water-salt-nutrient budgets

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