Navigation Links
Sequence matters in droughts and floods
Date:1/8/2009

When extremes of drought and flood come in rapid succession, the extent of damage to vegetation may depend in part on the sequence of those events, according to a new study published in The American Naturalist.

The study, which focused on tree species common to the Everglades in Florida, found that seedlings maintained higher growth rates and were less likely to die when subjected to drought first then flood, rather than vice versa. The findings could have significant implications for predicting how vegetation responds to climate extremesespecially amid forecasts of increasingly severe droughts and floods associated with climate change, say authors ShiLi Miao (South Florida Water Management), Chris B. Zou and David D. Breshears (both University of Arizona).

According to Dr. Miao, most previous studies on how vegetation responds to hydrological events have been based largely on responses to a single hydrological condition. Few studies have investigated multiple events in succession.

"Our research suggests that you can't really predict how the plants will respond to combinations of drought and flood by studies that look just at a single drought or a single flood," Dr. Miao said. "We found that plants respond very differently depending on the sequence of flood and drought."

In a greenhouse, Dr. Miao's team subjected seedlings to sequences of conditions that simulated drought and flood, with each phase lasting four months.

The three species chosen for the experiments have varying tolerances to hydrological events. The pond-apple tree (annona glabra) tends to be flood tolerant. The gumbo-limbo (bursera simaruba, also known as West Indian birch) tends to be drought tolerant. The red maple (acer rabrum, also known as swamp maple) has intermediate tolerances to drought and flood.

Each species tested showed higher mortality and lower growth rate when flood was first in the sequence, compared to when drought came first.

The study has implications for the restoration and management of the Everglades and other aquatic systems, Dr. Miao says. The results suggest that "the challenge ahead includes evaluating different sequences of extreme events."

Dr. Miao and her team plan to conduct additional research on various wetland plants related to their nutrient removal function under extreme hydrological conditions.


'/>"/>

Contact: Kevin Stacey
kstacey@uchicago.edu
773-834-0386
University of Chicago Press Journals
Source:Eurekalert

Related biology news :

1. Meth exposure in young adults leads to long-term behavioral consequences
2. First individual genome sequence published
3. Inconsistencies with Neanderthal genomic DNA sequences
4. Microarray sequence capture speeds large-scale resequencing of targeted genomic regions
5. Scientists complete genome sequence of fungus responsible for dandruff, skin disorders
6. What are the causes and consequences of childhood obesity?
7. Tiny genetic differences have huge consequences: McGill researchers
8. Bacterium sequenced makes rare form of chlorophyll
9. Washington University increases fleet of Roche Genome Sequencer FLX Systems
10. Washington University unveils draft sequence of corn genome
11. Giant panda genome to be sequenced
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/30/2016)... and WARSAW, Poland , Nov. 30, 2016 ... is one of the most crucial aspects of recovery so we need to do ... serious health risks, including heart problems, high blood pressure, stroke, diabetes, and even cancer. ... friends sleep and find a Christmas present that could help them to manage their ... ...
(Date:11/29/2016)... , Nov. 29, 2016   ... identification and object recognition technologies, today released ... for fingerprint recognition solutions that run on ... fingerprint template using less than 128KB of ... compact devices that have limited on-board resources, ...
(Date:11/24/2016)... IRVINE, Calif. , Nov. 23, 2016 ... help endurance athletes and their trainers non-invasively measure ... Variability Index, Pulse Rate, and Respiration Rate in approximately ... Ember enables users easy and immediate access to key ... as part of a training regimen. ...
Breaking Biology News(10 mins):
(Date:12/6/2016)... ... December 06, 2016 , ... ... 1, 2016 asking the Federal Drug Administration (FDA) to consider OA as a ... OARSI is concerned about the growing population of OA patients, many of whom ...
(Date:12/6/2016)... Colorado (PRWEB) , ... December 06, 2016 , ... ... dynamic aqueous plasma technology platforms, announced today that the company has engaged in ... Research and Development Agreement (MRDA) with the CSU Office of the Vice President ...
(Date:12/6/2016)... , Dec. 6, 2016  Creative Medical Technology ... , MD, PhD, FANA, FAAN to the Company,s Scientific ... and clinical trials to assist the Company,s clinical development ... AmnioStem product is a universal donor stem cell derived ... in animal models of stroke 1 .  ...
(Date:12/6/2016)... Australia , Dec. 6, 2016  The ... Informatics Society of Australia (HISA) today announced the ... startup exchange program between Australia ... in the world. HISA and the ... initiating a program to create a global health innovation ...
Breaking Biology Technology: