HOME >> BIOLOGY >> NEWS
Finding hidden invaders in a Hawaiian rain forest

global ecologists and engineers from the NASA Jet Propulsion Laboratory are flying an upgraded version of the AVIRIS airborne spectrometer on a more nimble Twin Otter turboprop aircraft, not only to find invasive species, but to develop the next generation of ecosystem monitoring capabilities.

On Kilauea Volcano, the native Metrosideros tree typically has a low concentration of nitrogen in its leaves ( .6% to .8%), while the invading Canary Islands tree has relatively high nitrogen concentration (1.5% to 1.8%), because it can acquire nitrogen from the atmosphere.

"The high leaf nitrogen associated with the invading tree means that it is basically fertilizing the forest with more nitrogen," commented Asner. "The leaves turn over faster and there is more nitrogen in the soil. However, the invader shades out nearly all other species, so this excess nitrogen is not available to other species. Although we don't know exactly what the domino effects of this invasion will be, we are in a good position to predict them as we learn more about the chemical changes the forest is undergoing."

The scientists also had a big surprise using the new aircraft-based techniques: they located another invader, the Kahili ginger plant (Hedychium gardnerianum), growing under the forest canopy. Ginger cannot be detected from above the forest canopy using traditional aircraft or satellite approaches, but the new methods are sensitive to its high water content. In addition, the aircraft-based analysis discovered that ginger reduces the amount of nitrogen in the Metrosideros forest canopy--a discovery that was later corroborated by ground-based sampling.

Peter Vitousek from Stanford University, who coauthored the paper, commented: "This is the first time where remote sensing showed me something new concerning how an ecosystem works. Up to this point, remote sensing has been invaluable for understanding how features or processes that have been observed in one
'"/>

Contact: Dr. Gregory Asner
gpa@stanford.edu
650-380-2828
Carnegie Institution
7-Mar-2005


Page: 1 2 3

Related biology news :

1. Finding protection from tumor growth in unexpected places
2. Finding the white wine difference
3. Finding an answer to Darwins Dilemma
4. Finding a cure for cancer: The holy grail of science
5. Finding the right mix: A biomaterial blend library
6. Finding paves way for better treatment of autoimmune disease
7. Finding about cellular microtubule rigidity could lead to development of new nano-materials
8. Findings by Einstein scientists reveal possible strategy against obesity, diabetes and infertility
9. Finding of a new molecular marker of resistance to chemotherapy in breast cancer
10. Finding a cellular Neverland: How stem cells stay childlike
11. Finding a virus is not all bad news

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


(Date:2/6/2020)... (PRWEB) , ... February 06, 2020 , ... ... to facilitate access to unique lab-made bioresearch materials, today announced an agreement with ... and plant-based meat and seafood a reality. Under the partnership, terrestrial meat and ...
(Date:2/5/2020)... ... February 05, 2020 , ... LabKey has ... efficiency and insight to sample processing within laboratories. , Built with input ... research in various fields, LabKey Sample Manager has been designed with an intuitive ...
(Date:1/30/2020)... (PRWEB) , ... January 30, 2020 , ... Accelera ... an eye on the Canadian market, is pleased to announce that the company has ... growth since the company launched in 2017. , “We are so thrilled to ...
Breaking Biology News(10 mins):
(Date:1/24/2020)... Calif. (PRWEB) , ... January 24, 2020 , ... ... launch of their RedySmart™ mass flow meters and controllers ideal for ... as an ideal upgrade to antiquated rotameters. These thermal instruments employ high-precision MEMS ...
(Date:1/22/2020)... FARMINGTON, Conn. (PRWEB) , ... January 21, 2020 , ... ... Cell (CTC) liquid biopsy from a simple blood draw, today announced the sale of ... UConn Health. The Rare Scope will be used in clinical cancer research. , “The ...
(Date:1/8/2020)... ... January 08, 2020 , ... ... helps couples and individuals grow their family, has announced that five of their ... Castle Connolly. Since 1991, the renowned publishing company Castle Connolly has ...
(Date:1/7/2020)... ... 2020 , ... ABCT , the Accelerator for Biosciences ... participate in the annual program. Twelve ventures will participate in the 6.5-month-long program ... All startups will receive an entrepreneur coach, access to active business professionals and ...
Breaking Biology Technology:
Cached News: