We did not find any grazed Amorpha, therefore n = 10 for this species in our analyses (five burned, five unburned).
One composite sample was analyzed for each species in each treatment--burned/grazed, burned/ungrazed, unburned/ungrazed, and unburned/grazed (with the exception of Amorpha, for which grazed individuals were not collected).
There was no difference in grazing between burned and unburned plots for Desmodium or Amorpha (P = 0.
However, there was no significant relationship between distance from the woods and average percent grazed for Amorpha (P = 0.
Considering only the main effect of species, Amorpha had a significantly greater concentration of the recalcitrant C fraction compared to other species, while D.
i] and average percent grazed varied greatly: highly preferred Desmodium exhibited an average of 39% of stems grazed while on average only 2% of Amorpha exhibited herbivore damage.
1998) and since grazing events were so infrequent we are unable to hypothesize which herbivores are responsible for Amorpha grazing.
Amorpha had a C:N ratio and %N similar to that of Desmodium but had a significantly higher proportion of recalcitrant C, which likely offset the relatively high N content in terms of herbivore digestibility.
In the savanna, abundance of Amorpha was not significantly higher in plots with nutrients added [ILLUSTRATION FOR FIGURE 3D OMITTED] (F = 0.
This largely reflected a greater abundance of Lathyrus and Amorpha in the savanna.
Such differences in traits might explain why Lespedeza and Amorpha responded differently than Lathyrus to non-nitrogen nutrient addition and protection from herbivores.
