mixotrophic

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mixotrophic

[¦mik·sə¦träf·ik]
(biology)
Obtaining nutrition by combining autotrophic and heterotrophic mechanisms.
References in periodicals archive ?
How good must a mixotroph be in uptake of dissolved mineral nutrients in order to "beat" a specialized phagotroph with its assumed superior affinity for the common prey [Mathematical Expression Omitted]?
Increasing [Mathematical Expression Omitted] is also a "safe" strategy for the mixotroph, in the sense that it always will increase the steady-state concentration of mixotrophs.
The question asked in this situation is how good a predator the mixotroph must be in order to compensate for the assumed "price" paid in affinity for dissolved nutrients relative to the specialized osmotrophic autotroph.
the compensating effect from predation is insufficient to allow establishment of the mixotroph along with the superior bacterial competitor (the autotroph is also excluded in this case).
Today it is well established that a large proportion of phytoflagellates in lakes can be mixotrophic, and that these mixotrophs can contribute significantly to bacterial grazing (e.
Also, the proportion of mixotrophs in the phytoplankton community appears to be highest in oligotrophic systems (Riemann and Christoffersen 1993, Jones 1994).
The high effort of mixotrophs to run both a phototrophic and a phagotrophic metabolism may cause higher basic metabolic costs and limit the attainable reproductive rates as compared to more specialized organisms.
Therefore, trophic interactions involving mixotrophs offer an interesting field for experimentation (Rothhaupt 1996).
It is not immediately clear that a mixotroph will compete with other phototrophs for dissolved mineral nutrients.
185 [[micro]mol] P/L) corresponded well to the estimated P content of the newly established mixotroph population (0.
In pairwise combinations, the mixotroph coexisted with the heterotroph and with the obligate chemolithotroph when both resources were supplied.
In the field, mixotrophs can compete with heterotrophs for the uptake of food particles and with phototrophs for light and mineral nutrients.