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CATEGORIES:Lectures & Presentations
DESCRIPTION:The Environmental & Plant Biology Colloquium Series presents Dr
. Jared DeForest discussing "The impact of shifting nutrient economics on f
orested ecosystems: Reevaluating paradigms from a decadal research experime
nt” on Oct. 23 at 11:50 a.m.\n\nJoin Microsoft Teams Meeting+1 614-706-6572
United States\, Columbus (Toll) Conference ID: 798 343 578#DeForest is A
ssociate Professor of Environmental & Plant Biology at Ohio University.\n\n
Abstract: Mineral nutrition is an important factor for understanding forest
ecosystem productivity\, function and composition. An emerging paradigm su
ggests that the dominant form of nutrients can be the driving factor mediat
ing plant-microbial-soil interactions and feedbacks\, in addition to the bi
ogeochemical cycling of carbon and nutrients. For example\, an inorganic nu
trient economy is characteristic of an acquiring system where nutrients cyc
le rapidly by microbial “scavengers” whereas an organic nutrient economy is
characteristic of a recycling system where nutrient turnover is slower\, p
rocessed by the microbial “miners”. Related to this\, I present my three co
re research activities addressing several paradigms: Mycorrhizal-Associated
Nutrient Economy (MANE) hypothesis\, the microbial mining hypothesis\, and
nutrients in synergy hypothesis. This is accomplished by leveraging my 11-
year manipulation experiment where the native\, nutrient-poor organic nutri
ent economy was shifted towards a nutrient-rich inorganic economy by adding
phosphate fertilizer and/or lime in several mixed mesophytic forests. In t
his presentation I\, 1) provide evidence that shifting nutrient economics c
an have a disproportionate impact on tree growth depending on their symbiot
ic associations with fungi. 2) Show increasing soil pH and/or phosphorus ca
n suppress late-stage oak litter decay rates and may be contributing to inc
reased soil carbon storage. 3) Present novel evidence that increasing phosp
horus can also increase the cycling and availability of soil nitrogen\, sho
wing these two essential nutrients are tightly linked.
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SUMMARY:Plant Biology Colloquium | Jared DeForest on Oct. 23
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URL:https://calendar.ohio.edu/event/plant_biology_colloquium_jared_deforest
_on_oct_23
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