Ecological relevance concentration

In the bright yellow lamellarian Marseniopsis mollis, soft mantle tissue covers a reduced shell, which makes this species, similar to opisthobranchs, susceptible to predation. In the first demonstration of chemical defense in a prosobranch mollusc, ecologically relevant concentrations of homarine, which is present in high concentrations in the tissues of Marseniopsis mollis, caused... 

Induction of chemokinetic ability also occurs in Alcaligenes strain M3A.60 Dimethyl sulfonio-propionate (DMSP) is an attractant for bacteria that have been induced to produce DMSP lyase. Such cells are attracted to DMSP at ecologically relevant concentrations, but uninduced cells do not respond to DMSP. Since DMSP lyase produces dimethylsulfide, which is important to global climate regulation, Zimmer-Faust et al.60 suggest that bacterial chemokinesis may play a critical role in global sulfur cycles and climate. 

Schramel, P., Wendler, I., and Lustig, S. (1995). Capability of ICP-MS (pneumatic nebuliza-tion and ETV) for Pt-analysis in different matrices at ecologically relevant concentrations. Fresenius J. Anal. Chem. 353(2), 115. 

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