Navigation Links
Remote wilderness polluted by humans
Date:12/16/2011

The research is based on studies of sediment from 36 lakes in the USA, Canada, Greenland and Svalbard, Norway. The researchers have analysed how the chemical composition of the sediment has changed over the centuries. Twenty-five of the lakes all show the same sign that biologically active nitrogen from human sources can be traced back to the end of the 19th century.

The nitrogen analyses of the lake sediments show that the changes began around 1895. The results also show that the rate of change has accelerated over the past 60 years, which is in agreement with the commercialisation of artificial fertiliser production in the 1950s. Sofia Holmgren, a researcher in Quaternary Geology at Lund University, Sweden, is the only Swede to take part in the comprehensive study.

"I have studied lakes on Svalbard, where the effects of the increased nitrogen deposition are clearly visible in the algal flora", says Sofia Holmgren.

She explains that both the species composition and production of diatoms microscopic siliceous algae have changed dramatically in the lakes on Svalbard since the start of the 20th century, with the most significant changes over the past decades.

Combustion of fossil fuels and use of fertiliser are the main sources of the increasing amount of nitrogen in the atmosphere. The nitrogen is transported with air currents and reaches the ground in rain or snow. It can travel thousands of kilometres and the nitrogen thus reaches even the most remote lakes and ecosystems.

Nitrogen is an important nutrient for plants, but overuse in more intensive farming can lead to pollution of watercourses, smog and acid rain in urban environments. However, little is known about the effects in more remote areas. An increasing number of studies of Arctic lakes are now showing major changes to the ecosystems.


'/>"/>
Contact: Sofia Holmgren
Sofia.Holmgren@geol.lu.se
46-709-289-778
Lund University
Source:Eurekalert

Page: 1

Related biology news :

1. Ultrasound shown to exert remote control of brain circuits
2. Robo-bats with metal muscles may be next generation of remote control flyers
3. Scientists report first remote, underwater detection of harmful algae, toxins
4. Using remote sensing to track invasive trees
5. Remote control for cholesterol regulation discovered in brain
6. A revolutionary breakthrough in terahertz remote sensing
7. DigitalPersona Delivers New Centrally-Managed Solution for Notebook Data Protection and Remote Access Security
8. Frost & Sullivan Recognizes Cardiocom as a Technology Enabler for Superior Cost-Effective Remote Chronic Care Management
9. Frost & Sullivan Recognizes Cardiocom as a Technology Enabler for Superior Cost-Effective Remote Chronic Care Management
10. Student innovation at Rensselaer holds key to safer remote detection of dangerous materials
11. New treaty on search for life-saving medicines in remote areas
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/17/2014)... , Dec. 16, 2014 Valencell, a leader in ... biometric technology to industry leaders such as Intel, Jabra, ... validated, biometric wearable products. These products will be showcased ... Las Vegas . "Our ...
(Date:12/11/2014)... 09, 2014 Research and Markets , ... ) has announced the addition of the "Biometrics ... offering. One major trend emerging in ... in technology, it is important to upgrade biometric solutions ...
(Date:12/10/2014)... NEW YORK , Dec. 8, 2014 You,ve been here ... but can,t remember your password, site key or the answer to ... grade teacher? Today, Hoyos Labs , a ... finally put an end to the frustration that comes with usernames, ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3
... Two chemicals -- trichloroethylene (TCE) and tetrachloroethylene (PCE) -- ... Base Camp Lejeune from the 1950s to 1985 have ... cancers. A new report from the National Research ... Potential Health Effects, reviews scientific evidence about the potential ...
... humans have evolved to naturally understand things like facial expressions ... found there is an ever-widening gap between what humans can ... successful adults in today,s modern society. Schools have traditionally helped ... the U.S. more may need to be done. "Schools ...
... Australian company Stadvis Pty Ltd have signed a worldwide ... predicts glycemic index (GI) and resistant starch (RS) in ... with an accurate means of testing the functional properties ... is much quicker and more cost-effective than the current ...
Cached Biology News:MU study finds connection between evolution, classroom learning 2CSIRO deal to commercialize 'artificial gut' 2
(Date:1/22/2015)... January 22, 2015 Pipette.com has added ... to their comprehensive portfolio of Eppendorf products. , The ... purchase a Centrifuge 5424/5424 R and receive the following:, ... Eppendorf Research plus or Eppendorf Reference 2 , ...
(Date:1/22/2015)... Geneva, Switzerland (PRWEB) January 22, 2015 ... for characterized mammalian Research Cell Banks (RCBs) used for ... generated Research Cell Banks will include Next-Generation Sequencing ... cell’s genetic architecture de-risks biologic manufacturing by ensuring the ...
(Date:1/22/2015)... ALTO, Calif. , Jan. 22. 2015  Varian Medical Systems ... and software, has been honored for its commitment to sustainability ... sustainable companies. Varian is the highest ranked healthcare equipment company ... announced today during the World Economic Forum at ...
(Date:12/24/2014)... Dec. 24, 2014  United Therapeutics Corporation (NASDAQ: ... MDT ) has submitted a pre-market approval application ... the use of Medtronic,s SynchroMed ® II implantable ... use with United Therapeutics, Remodulin ® (treprostinil) Injection ...
Breaking Biology Technology:Eppendorf Announces Promotional Bundle Which Includes: Eppendorf Centrifuge 5424, 3-Pack of Pipettes, and Tips - Available Now at Pipette.com 2Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2Varian Honored Among World's 100 Most Sustainable Corporations 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 2United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 3United Therapeutics Announces Submission Of Pre-Market Approval Application For Implantable Drug Infusion System To Deliver Remodulin 4
... Mymetics,Corporation (OTC: MYMX), will be holding an important ... New York Time to update all shareholders,on the recent ... 10-Q and to,address recent press articles., You may ... +1-866-591-4361 PIN 815,726 and from Europe at +41-800-329-326 PIN ...
... PALO ALTO, Calif., Aug. 24 Varian, Inc.,(NasdaqGS: ... the analysis of small molecules and proteins. The ... use entirely high intensity,micro-source X-ray technology. It includes ... faster results even for the most,challenging crystals., ...
... Calif., Aug. 22 Beckman,Coulter, Inc. (NYSE: ... and marketer,of products that simplify, automate, and ... Glyer, Beckman Coulter,s senior vice,president of Corporate ... Morgan Stanley Healthcare Unplugged Conference on Tuesday, ...
Cached Biology Technology:New Dual Wavelength X-ray Diffractometer From Oxford Diffraction, Now a Part of Varian, Inc., Allows Increased Throughput for Challenging Single Crystal Analyses 2Beckman Coulter to Present at the Morgan Stanley Healthcare Unplugged Conference 2
... for analytical performance , ... the ultimate in analytical,performance, the ... 810-MS features include: , ... providing reliable, routine, trace level,quantification. ...
... high-performance ICP-MS system designed for flexibility and ... II off-axis ion lens, true hyperbolic quadrupole ... handle the widest range of sample types ... now includes as standard Agilents unique ShieldTorch ...
... Identical to the DH-2000, except that it ... 190-1700 nm wavelength range and comes with a ... up to 5 Hz) The DH-2000 ... spectrum of deuterium and tungsten halogen light sources ...
... a fully automated microplate luminescence reader ... possible range of applications based on ... luciferase, -galactosidase, gene activities with luminescence ... Luminescent Immunoassays Cell-based assays (cytotoxity ...
Biology Products: