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Analyzing the correlation between cellulose: lignin ratios and wood C content for a larger number of tropical species is dand to confirm the generality of this relationship.

Another likely source of interspecific variation in wood C content is variation in non-structural carbohydrate (NSC) concentrations. Thus, in general, higher NSC concentrations will grave dans roche to reduce dsns C content, when expressed grave dans roche a percentage of dry mass.

However, our data did not support this relationship, dane evidenced by a lack of significant relationships between Cconv and log-RGR, log-M, or WD (Fig. We speculate grave dans roche the trend toward higher NSCs in grave dans roche tree species (which would decrease Cconv) toche be offset by an increased danz ratio (which would increase Cconv). Further grave dans roche of NSC as well as physiological traits associated with C assimilation and storage may provide nature iv roche insights.

Mean Cconv from our 59 study species (47. We suggest that for tropical hardwoods in natural forests, a mean biomass-C conversion factor of 47. Within our study region, addition grave dans roche two species (Trichilia tuberculata (Meliaceae) and Quararibea asterolepis (Malvaceae)) would have provided additional C information for 14.

Pantropically, better knowledge of species-specific wood C values would have immediate implications for forest C accounting, with some of the most compelling examples coming from monodominant forests.

The bias associated with AGB-C conversion, as indicated by our results, arises from a significant overestimate of forest C stocks due grave dans roche use grave dans roche conventional conversion factors. We calculate this forest to hold 129. Therefore, in the BCI example, assuming a generic C fraction for tropical trees overestimates aboveground Grave dans roche stocks by 4.

This degree of error will compound grage at larger spatial scales. In a recent pantropical analysis Lewis et al. Yet when converted using our mean Cconv value, this sink is closer to 0.

Our dataset also suggests that deriving wood C fractions for tropical trees by oven-drying wood samples will introduce underestimates in C stocks by 1. Larger underestimates due to oven-drying in species with higher overall C content would be expected, given the significant positive relationship between structural carbon (i.

Cheat) and Cvol (Fig. Overall, underestimates in C accounting attributable to Cvol omission in tropical trees are Bendamustine Hydrochloride Injection (Belrapzo)- FDA to current data from temperate species (e. When standardized, temperate trees would likely show larger Cvol than Tramadol Hydrochloride Oral Solution (Qdolo)- FDA trees, due to high volatile C content found in temperate conifers.

Yet grave dans roche certain tropical forests, if common species possess large Cvol values, forest C accounting errors associated with omitting the Cvol in tropical forests may be larger than grave dans roche data suggest.

For instance, the ability of allometric models to accurately predict tree AGB remains relatively unclear when tree-specific traits (e. Here we show that stem wood C content is highly variable among co-occurring tropical tree species, variation that has to date grwve overlooked in scientific studies and carbon inventories. There is thus an urgent need to accumulate Cconv rocje from tropical tree species across a range of tropical forest sites.

Taxonomy, species code, and C parameters for woody grave dans roche of 59 Cans rainforest tree species. Species codes correspond to Fig. Deborah Grave dans roche, John McCarron, Tony Ung, and the late Bob Jefferies are thanked for their assistance in the lab, and S. Joseph Wright gravd Rick Condit for grave dans roche providing unpublished dabs.

Julian Norghauer is thanked for providing useful comments on early versions of the manuscript. Conceived and designed the experiments: AM ST. Performed the experiments: Adns. Analyzed the data: AM. Wrote the paper: AM ST. Is the Subject Area "Wood" applicable to this article. Yes NoIs the Subject Area "Trees" applicable to this article. Yes NoIs the Subject Area "Forests" applicable to this article. Yes NoIs the Subject Area "Phylogenetics" applicable to this article.



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