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:3/14/2016)... Florida , March 14, 2016 ... the growing mobile commerce market, announces the airing of a ... channels starting the week of March 21 st .  The ... CNBC, including its popular Squawk on the Street show. ... focused on the growing mobile commerce market, announces the airing ...
(Date:3/11/2016)... http://www.apimages.com ) - --> http://www.apimages.com ) - ... Images ( http://www.apimages.com ) - Germany . ... new refugee identity cards. DERMALOG will be unveiling this device, and ... Hanover next week.   --> Germany ... the new refugee identity cards. DERMALOG will be unveiling this device, ...
(Date:3/10/2016)... India , March 10, 2016 ... a new market research report "Identity and Access Management ... & Audit, Compliance, and Governance), by Organization Size, by ... to 2020", published by MarketsandMarkets, The market is estimated ... USD 12.78 Billion by 2020, at a Compound Annual ...
Breaking Biology News(10 mins):
(Date:5/3/2016)... ... May 03, 2016 , ... Flagship Biosciences, the leader in ... its Board of Directors. Dr. Gillett recently retired from Charles River Laboratories (CRL), ... Chief Scientific Officer. A board-certified veterinary pathologist, Dr. Gillett joined Charles River in ...
(Date:5/3/2016)... THE WOODLANDS, Texas , May 3, 2016 /PRNewswire/ ... board certified plastic surgeon in The Woodlands, ... technology that destroys 24 percent of treated fat cells ... men and woman. Close to 90 percent of Americans ... effective treatment options. Nonsurgical fat reduction procedures are a ...
(Date:5/2/2016)... (PRWEB) , ... May 02, 2016 , ... ... with its clients in mind, the fresh look and added functionality give the ... “Recent years have seen a dynamic shift in agriculture – from precision farming ...
(Date:4/29/2016)... ... April 29, 2016 , ... Proove Biosciences, Inc ., ... the launch of the Proove Health Foundation . The Foundation is a ... the use of personalized medicine for tackling the nation’s most-pressing healthcare epidemics. As ...
Breaking Biology Technology: