HOME >> BIOLOGY >> NEWS
How trees changed the world

Before 380 million years (Ma) ago, the continents had only patches of mosses and algae with no tree cover. The effect of the evolution of trees (large vascular plants with deep, extensive roots) changed the world for ever, according to Dr Robert Berner (Yale University). He presents his findings at Earth Systems Processes, a multidisciplinary meeting in Edinburgh, UK, hosted jointly by the Geological Society of London (GSL) and the Geological Society of America (GSA).

The first trees soaked up nutrients from rocks at a rate never before seen. This enhanced the weathering of calcium (Ca) and magnesium (Mg) silicate minerals, which in turn removed carbon dioxide from the atmosphere as Ca and Mg became locked together with carbonate ions in lime-rich sediments in the worlds oceans. The removal of CO2 from the atmosphere by this method and by increased photosynthesis (fixation) led to atmospheric CO2 stabilising at lower levels than the world had known for most of its previous 4200Ma history.

Trees also produced, for the first time, large amounts of lignin - the major constituent of wood. Resistant to decay, this substance led to increased amounts of organic carbon being buried with sediments, representing a large excess of global photosynthesis (carbon fixation) over global respiration (carbon oxidation). As atmospheric carbon dioxide was progressively reduced and photosynthesis reached unprecedented levels, the atmosphere became extremely rich in oxygen much richer than the air we know today.

Oxygen-enriched air was directly responsible for the evolution of very large insects - much larger than could live in todays relatively oxygen-poor air (insects rely upon more or less passive diffusion of O2 into their tissues, so large bodies become impossible at lower concentrations).

As well as the formation of huge coal deposits well known from Upper Carboniferous (Pennsylvanian) rocks worldwide, this radical shift in the Carbon Cycle also low
'"/>

Contact: Ann Cairns
acairns@geosociety.org
303-447-2020 x1156
Geological Society of America
26-Jun-2001


Page: 1 2

Related biology news :

1. Study: Emission of smog ingredients from trees is increasing rapidly
2. Plumbing trees plumbing reveals their engineering skill
3. An exotic grass kills trees by hijacking their water
4. Duke study disputes idea that trees can relocate quickly in response to climate change
5. Limited climate tracking in European trees despite 10,000 years of postglacial warmth
6. Newfound grasshopper takes to the trees on Konza Prairie
7. Chestnut trees to spread across landscape again, says Purdue scientist
8. Brood X cicadas will cause limited damage to trees, yard plants across eastern U.S.
9. Seeing the forest for the trees: The future of environmental policy lies in interaction
10. Armies of fighting fungi protect chocolate trees
11. Science paper: Overharvesting of Brazil nuts leading to fewer trees

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:1/18/2017)... Minn. , Jan. 18, 2017 ... technology company that supports the entire spectrum of ... has been another record-breaking year for the organization ... market interest in MedNet,s eClinical products and services. ... the tremendous marketplace success of iMedNet ...
(Date:1/12/2017)... 2017  Trovagene, Inc. (NASDAQ: TROV ), ... announced that it has signed agreements with seven strategic ... Middle East for commercialization of ... first wave of international distribution agreements for Trovagene,s CLIA ... The initial partners will introduce Trovagene,s liquid ...
(Date:1/12/2017)... and PUNE, India , January 12, 2017 ... Opportunities and Forecasts, 2015 - 2022," projects that the global biometric technology market is ... 19.4% from 2016 to 2022. Continue Reading ... ... ...
Breaking Biology News(10 mins):
(Date:1/24/2017)... ... January 23, 2017 , ... Oklahoma City based Sigma Blood Systems has established ... PERFEQTA software and legacy product QC Manager 2.0. , Sigma Blood Systems CEO, ... and thrilled that they have decided to implement PERFEQTA and QC Manager 2.0, with ...
(Date:1/24/2017)... , January 23, 2017 According ... Market by Type (Genetic, Cell-based (CD34, PBMC, BLT)), Application ... User (Pharmaceutical & Biotech Companies, CRO) - Global Forecast ... global Humanized Mouse Model Market for the forecast period ... reach USD 116.0 Million by 2021 from USD 73.3 ...
(Date:1/24/2017)... Jan. 23, 2017  Today, the Fisher Center for ... funded an important study that could lead to the ... of Alzheimer,s disease. This groundbreaking research was conducted by ... by Nobel Laureate Dr. Paul Greengard , in ... Fisher Center scientists have linked a mutation ...
(Date:1/23/2017)... Fl (PRWEB) , ... January 23, 2017 , ... ... venture-backed teleradiology and telemedicine company announces significant growth last year adding 65 new ... Veterans Authority and US Army medical centers as well as one of US ...
Breaking Biology Technology:
Cached News: