KNAW Repository

Species-specific N and P release rates in Daphnia

Perez-Martinez, C. and Gulati, R.D. (1998) Species-specific N and P release rates in Daphnia. Hydrobiologia, 391, 147-155. ISSN 0018-8158.

[img]PDF - Published Version
Restricted to KNAW only

131Kb

Official URL: http://dx.doi.org/10.1023/A:1003581110687

Abstract

Bioavailable N and P release rates by juveniles and adults of three Daphnia taxa (D. hyalina, D. galeata and its interspecific hybrids D. hyalina × galeata) were measured to assess the effect of weight and interspecific differences on these rates in Daphnia. Immobilized Scenedesmus obliquus cells were used to estimate the release rates. The specific release rate of N varied between 5.19–5.71 µg N mg C-1 h-1 for juveniles and 3.00–3.42 µg N mg C-1 h-1 for adults. P excretion rate ranged between 1.93–2.37 µg P mg C-1 h-1 for juveniles and 1.00–1.24 µg P mg C-1 h-1 for adults. Our results show that the taxonomic affiliation of Daphnia individuals did not affect their N and P release rates. [KEYWORDS: N and P release rates; Daphnia; Scenedesmus; species-specific effects Life-history variation; phosphorus release; nutrient limitation; nitrogen-excretion; ammonia excretion; planktonic algae; nitrite uptake; food quality; zooplankton; phytoplankton]

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:10773
Deposited On:25 Nov 2011 01:00
Last Modified:31 Mar 2014 10:05

Repository Staff Only: item control page