PMC:1044833 / 44016-45528 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/1044833","sourcedb":"PMC","sourceid":"1044833","source_url":"https://www.ncbi.nlm.nih.gov/pmc/1044833","text":"Diffusion across the sediment–water interface of the rhizosphere was also considered as an additional input of sulfate and hydrogen ions. This was included as one-dimensional diffusion across a circular surface (subtracting the area encompassed by the tubeworm tubes) with diffusion distance equal to rhizosphere diameter, and concentration differential from seawater concentration to the average concentration within the rhizosphere. Sulfate and hydrogen ion diffusion across the root surface was then added (if included in the set of model realizations) as simple Fickian diffusion. Concentration differential was the difference between internal concentration and average concentration for each disc of the rhizosphere assuming roots were evenly proportioned according to the volume encompassed by each disc. Internal sulfate concentration and pH (Table 2) represented an average of the values determined for R. pachyptila [22], a hydrothermal vent tubeworm. Internal sulfate concentrations and pH of L. luymesi have not been reported, but these values are generally consistent within taxa [50]. Uptake of sulfide and release of sulfate were summed across the entire tubeworm population, again assuming an even distribution of roots within the rhizosphere. The paucity of empirical data on the location of any individual tubeworm's roots within an aggregation precluded modeling space explicitly; therefore, it is assumed that each individual has equal access to the resources available within the rhizosphere.","tracks":[{"project":"2_test","denotations":[{"id":"15736979-10222324-84746037","span":{"begin":926,"end":928},"obj":"10222324"},{"id":"T62821","span":{"begin":926,"end":928},"obj":"10222324"}],"attributes":[{"subj":"15736979-10222324-84746037","pred":"source","obj":"2_test"},{"subj":"T62821","pred":"source","obj":"2_test"}]}],"config":{"attribute types":[{"pred":"source","value type":"selection","values":[{"id":"2_test","color":"#a793ec","default":true}]}]}}