Global seed supply is too poorly understood to even speculate on its contribution to the regeneration of forests that are increasingly lost to disturbance, climate change, and extensive human management. Through data synthesis and collaborations with more than 100 international researchers, the Clark lab has established the mastif project and assimilated seed production data for 12.1 millition tree-years in more than 700 species from all vegetated continents. We are interested in:
There are current four published papers listed in the following, one manuscript in review and can be requested here. There are also three papers in progress, with results available here.
This paper aims to understand the size-numbers trade-off in species seed production and how species traits have mediate the trade-off. The paper also reveals the effects of soil fertility on both individual and community fecundity at a global scale.
This found orders of magnitude of differences in seed production from dry tundra to tropical rainforest beyond which can be explained by the Net Primary Production (NPP).
A global analysis finds that fecundity decline in large trees is pervasive, consistent with physiological decline, thus providing new evidence for tree senescence. For the 20% of species not showing fecundity declines, this lack of evidence was linked not to specific species groups, but rather to lack of large trees in the data.