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Scaling of respiration to nitrogen in leaves, stems and roots of higher land plants
Author(s) -
Reich Peter B.,
Tjoelker Mark G.,
Pregitzer Kurt S.,
Wright Ian J.,
Oleksyn Jacek,
Machado JoseLuis
Publication year - 2008
Publication title -
ecology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.852
H-Index - 265
eISSN - 1461-0248
pISSN - 1461-023X
DOI - 10.1111/j.1461-0248.2008.01185.x
Subject(s) - respiration , nitrogen , herbaceous plant , biology , botany , respiration rate , scaling , nitrogen cycle , ecology , chemistry , mathematics , geometry , organic chemistry
Using a database of 2510 measurements from 287 species, we assessed whether general relationships exist between mass‐based dark respiration rate and nitrogen concentration for stems and roots, and if they do, whether they are similar to those for leaves. The results demonstrate strong respiration–nitrogen scaling relationships for all observations and for data averaged by species; for roots, stems and leaves examined separately; and for life‐forms (woody, herbaceous plants) and phylogenetic groups (angiosperms, gymnosperms) considered separately. No consistent differences in the slopes of these log–log scaling relations were observed among organs or among plant groups, but respiration rates at any common nitrogen concentration were consistently lower on average in leaves than in stems or roots, indicating that organ‐specific relationships should be used in models that simulate respiration based on tissue nitrogen concentrations. The results demonstrate both common and divergent aspects of tissue‐level respiration–nitrogen scaling for leaves, stems and roots across higher land plants, which are important in their own right and for their utility in modelling carbon fluxes at local to global scales.