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Fossil Modern Stomata Theme: Research by Dr. Michael Hren
Fossil plants provide critical information for understanding ancient climate, ecosystems and plant function in past greenhouse climates. This data can inform scientists about the sensitivity of Earth’s climate to variations in atmospheric carbon dioxide concentrations or how climate changes on a regional and global scale in response to changes in the atmosphere. This project was focused on examining modern plant leaves from four species of riparian plants along the Fenton River, CT to understand how environmental variables impact plant stomatal conductance and water use efficiency and chemical signatures of these changes. Modern plants are then used as an analogue for evaluating ancient leaves preserved in 50 and 300 million year old sediments to understanding how plants impact global water cycling and climate.
We utilized macrophotography to examine leaf structure and stomatal morphology in modern and ancient materials and to evaluate physical traits in ancient leaves. This information is critical to quantifying water conductance through leaf stomata and understanding chemical signatures preserved in leaf waxes.
Results from this work show wide differences in how different riparian plant species regulate their stomata to optimize carbon assimilation from the atmosphere and minimize water loss through their leaves. This information strongly enhances our understanding of the chemical signature preserved in leaf materials and interpreting data from ancient leaves.
EXHIBIT ON DISPLAY NOW AT UCONN'S NATURAL HISTORY MUSEUM
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Images in this gallery were captured by:
Mark Smith M.S. Geoscientist mark@macroscopicsolutions.com
Annette Evans Ph.D. Student at the University of Connecticut annette@macroscopicsolutions.com
The Real Hong Kong Car Culture
Hong Kong Car | Automotive Photography since 2011
For a detailed introduction | guide on Hong Kong Car Licence Plates | Car Vanity Plates click on the link below to learn more :
✚ www.j3consultantshongkong.com/hk-car-vanity-plates
One of the largest collections of quality Hong Kong Car Images and specialising in Car Licence Plates | Car Vanity Plates or as the Hong Kong Government likes to call them - Vehicle Registration Marks
I photograph all car brands and please do bear in mind I am an enthusiastic amateur and NOT a professional photographer but I do have a fairly distinctive style and it has got better over the years.
☛.... and if you want to read about my views on Hong Kong, then go to my blog, link is shown below, I have lived in Hong Kong for over 50 years!
✚ www.j3consultantshongkong.com/j3c-blog
☛ Photography is simply a hobby for me, I do NOT sell my images and all of my images can be FREELY downloaded from this site in the original upload image size or 5 other sizes, please note that you DO NOT have to ask for permission to download and use any of my images!