Further, intermediate levels of nutrients under low light attenuation by TSS and macrophytes potentially supported higher phytoplankton biomass, pelagic GPP and the subsequent net autotrophy
in waters of St 30 comparing with stations more recently dredged (St 02 and St 15).
They discussed the concepts of autotrophy
, heterotrophy, and osmotrophy.
Although giant clams rely greatly on autotrophy
as the major source of carbon, heterotrophy is also important to the total energy needed by the clam for respiration and growth (Klumpp et al.
Exceptions are losses attributed to autotrophy
and heterotrophy respiration that indirectly are estimated by soil C[O.sub.2] emissions (Davidson and Janssens, 2006), the [NPP.sub.canopy] that is estimated through litterfall (Girardin et al., 2010), and the lateral exchange of carbon via river discharge ([L.sub.lateral]).
stages F3 and 4 in relation to the gradual increase in autotrophy
The GPP:R ratio is a measure of the proportional autotrophy
or heterotrophy of a system, with 1.0 being neutrality.
is thought to play an important role in the subsurface, we focused on this group of Archaea by carrying out incubations with labelled [sup.13]C[O.sub.2].
Beside their 16S rRNA-gene-based phylogenetic placement, uptake of [.sup.14]C bicarbonate (Schiemer et al, 1990) and the presence of RuBisCo enzymatic activity indicate Laxus ectosymbiont autotrophy
(Polz et al, 1992).
The type of vegetation cover and rainfall can also determine conditions of autotrophy
or heterotrophy in streams, having a strong effect upon the stream food web structure and dynamics, as shown by Uieda and Motta (2007) for some tropical streams.
All CPs are green and able to fix C[O.sub.2] (autotrophy
), although the growth of some species (mainly aquatic) is partly dependent on organic carbon uptake from prey (facultative heterotrophy; see Luttge, 1983).
Holz et al., "Plasmid-related anaerobic autotrophy
of the novel archaebacterium Sulfolobus ambivalens," Nature, vol.