An exotic grass kills trees by hijacking their water

Buffelgrass snatches water away from nearby palo verde trees, ultimately killing them.

Scientists thought deep-rooted plants such as desert trees did not compete with grasses for water.

Now researchers from the University of Arizona in Tucson report that buffelgrass, an invasive non-native species, grabs water before foothill palo verde trees can.

The situation does not bode well for the trees, said J. Alex Eilts, a doctoral candidate in UA's department of ecology and evolutionary biology. Native to the Sonoran desert, foothill palo verde trees, or Cercidium microphyllum, cope with drought by shedding branches to reduce the amount of water needed to survive.

"It's as if the trees are self-pruning themselves to death," he said.

Eilts will give his presentation, "Effects of a non-native grass on a dominant woody Sonoran desert tree," at 9:50 a.m. on Thursday, Aug. 5 in the Oregon Convention Center in Portland, Ore., at the annual meeting of the Ecological Society of America. His coauthor, Travis Huxman, is an assistant professor in UA's department of ecology and evolutionary biology.

Buffelgrass, or Pennisetum ciliare, thrives in arid and semi-arid climates. Ecologists are increasingly concerned about buffelgrass, a native of Africa often introduced for livestock grazing or to control erosion, because it spreads quickly and outcompetes native species. Buffelgrass now is found in Texas, New Mexico, Arizona, Mexico, Venezuela, Argentina, Hawaii and Australia.

First planted in the Tucson area shortly before 1940, the exotic grass now is found in the Tucson Mountains, on A Mountain and on nearby Tumamoc Hill, home of UA's century-old Desert Laboratory. Researchers believe that buffelgrass first invaded the laboratory grounds in the mid-1980s.

One focus of the laboratory is long-term research on the ecology of Sonoran desert plants. While working on a class project, Eilts noticed that, unlike other par

Contact: Mari N. Jensen, UA News Services
University of Arizona

Page: 1 2 3

Related biology news :

1. Study helps explain island populations susceptibility to exotic diseases
2. Michigan researcher helps resolve the conflict between exotic birds and eco-tourists
3. UNC ecologists find floodplains particularly vulnerable to invasion by exotic plant species
4. Professor develops strategies to control exotic plant species
5. As peoples taste for exotic foods increases, so too does health risk
6. Rutgers awarded $2 million NSF grant for documentary IMAX film on exotic life at oceans hydrothermal vents
7. Scientists invite others to join them online to discuss exotic species threat
8. Global online workshop on risks of exotic forest pests will be "live" in mid-April
9. Scientists go online to discuss threat posed by exotic forest pests
10. Changes in Australian ecosystems tied to arrival of exotic animals
11. Restoring sweetgrass to the South Carolina lowcountry

Post Your Comments:

(Date:3/30/2017)... 30, 2017 Trends, opportunities and forecast in ... by technology (fingerprint, AFIS, iris recognition, facial recognition, hand ... by end use industry (government and law enforcement, commercial ... banking, and others), and by region ( North ... Asia Pacific , and the Rest of ...
(Date:3/27/2017)... March 27, 2017  Catholic Health Services (CHS) ... Systems Society (HIMSS) Analytics for achieving Stage 6 ... sm . In addition, CHS previously earned a ... using an electronic medical record (EMR). ... level of EMR usage in an outpatient setting.  ...
(Date:3/23/2017)... , March 23, 2017 The report "Gesture Recognition ... Biometric), Industry, and Geography - Global Forecast to 2022", published by MarketsandMarkets, the ... a CAGR of 29.63% between 2017 and 2022. ... ... ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... Disappearing forests and increased emissions are the ... million people each year. Especially those living in larger cities are affected by air ... one of the most pollution-affected countries globally - decided to take action. , “I ...
(Date:10/10/2017)... ... 2017 , ... For the second time in three years, ... Award. Representatives of the FirstHand program travelled to Washington, D.C. Tuesday, October 10th, ... mission is to change the trajectory of STEM education in America by dramatically ...
(Date:10/10/2017)... ... October 10, 2017 , ... ... 13 prestigious awards honoring scientists who have made outstanding contributions to ... symposium during Pittcon 2018, the world’s leading conference and exposition for laboratory science, ...
(Date:10/9/2017)... Texas (PRWEB) , ... October ... ... study published on October 5, 2017, in the medical journal, Epilepsia, Brain ... with the gold standard, video EEG, in detecting generalized tonic-clonic seizures (GTCS) ...
Breaking Biology Technology:
Cached News: