C starvation or hydraulic failure?

C starvation or hydraulic failure?

Seedlings in the greenhouse getting ready for the shade and dry-down experiment

Browse Line

Browse Line

Very clear browse line created by white-tailed deer at the University of Michigan Biological Station.

Sun-up at the Arb

Sun-up at the Arb

Daybreak at the U-M Nichols Arboretum

Chris Karounos (MSc 2019) helping with a seedling census in a cedar swamp near UMBS.

ISRO

ISRO

Lab photo from our summer 2019 trip up to Isle Royale National Park as part of a research project measuring the effects of moose herbivory on growth and production of native forests.

MOOSE

MOOSE

This guy decided to visit us as we were camping on Siskiwit Bay during our Isle Royale trip.

Mikaila Davis, one of my mentees in the Doris Duke Conservation Scholars Program, taking measurements for her independent research project.

Greenhouse seedlings getting ready for over-wintering outside the Matthaei Botanical Gardens.

Early spring canopy conditions

Early spring canopy conditions

At the beginning of spring, seedlings have access to much more sunlight in the understory than they do once the canopy closes.

Acer saccharum seedlings

Acer saccharum seedlings

The seedlings I use in my research are all grown in a greenhouse and transplanted once they have fully expanded their leaves.

Douglas Lake

Douglas Lake

Morning mists rising from Douglas Lake at the University of Michigan Biological Station

Acer saccharum bud swelling

Acer saccharum bud swelling

Datasheet for scale

Acer saccharum leaf unfolding

Acer saccharum leaf unfolding

This seedling has experienced bud burst and the leaves are unfurling

Acer saccharum expanded

Acer saccharum expanded

Once the leaves have expanded, the plant turns from a carbon source to a carbon sink as it begins to assimilate carbon via photosynthesis.

Acer saccharum senescing

Acer saccharum senescing

Deciduous plants resorb nutrients and then excise leaves in fall so that the nutrients can be used easily the following growing season.

 

© 2019 Ben Lee