Navigation Links
Yes, ecology shapes evolution, but guppies show reverse also true
Date:2/4/2010

m processes. They collected guppies from the two different Trinidadian stream communities and placed them in the replicate, artificial streams that they'd built alongside the corresponding natural habitats.

"We also were careful to calibrate any effects against purely environmental differences, such as what one might see if we compared different, naturally occurring densities of guppies in both natural upstream and more crowded downstream conditions," Travis said. "So, our experiment simultaneously compared the ecological effects of guppies of each type in two densities, one double the other. That design enabled us to learn whether the changes we saw in the ecosystem processes were caused by the natural differences in guppy density or the differences in the guppy 'type.'"

"Type" mattered. For instance, because downstream guppies ate more insect larvae and less plant material, they excreted more nitrogen and less phosphorus.

"The combined effects of different grazing and different fertilization patterns served to change algal growth rates, detritus decay rates because guppies can eat the little animals that eat decaying leaves and the overall oxygen consumption rates in the ecosystem," Travis said.

"The evolutionary effects we documented are so large that an ecologist can no longer say, 'Sure, you evolutionary guys can show some effect from genetically based differences, but those effects are small in the big scheme of things.' Well, they aren't small. The changes generated by the new guppy species are at least as great as those found by doubling the density of existing guppies.

"We also show that the standard approach to theory in ecology and evolution, which is to say, 'Let's keep ecological variables constant and study evolution' or 'Let's keep evolutionary variables constant and study ecology,' isn't necessarily a good approximation for reality," Travis said. "We now know that evolutionary effects and ecologi
'/>"/>

Contact: Joseph Travis
jtravis@fsu.edu
850-644-4404
Florida State University
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Peter Reich, BBVA Foundation Frontiers of Knowledge Award in Ecology
2. Impact of eucalyptus plantations on the ecology of rivers
3. Ecology in organic ag: Combining farming, science
4. K-State receives more than $780,000 to fund graduate students studying ecology, evolution, genomics
5. NIH fellowship recipient to study disease ecology
6. Stimulus funding helps K-State bring undergrads to prairie for ecology, molecular biology research
7. Urban water ecology at the ESA annual meeting
8. Lohafex provides new insights on plankton ecology
9. Reversing ecology reveals ancient environments
10. Rise or fall of reef fish driven by both economy and ecology
11. Federal scientists recognized for contributions to knowledge of bird ecology and habitat
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Yes, ecology shapes evolution, but guppies show reverse also true
(Date:9/30/2014)... HONG KONG , Sept. 30, 2014 Winners of ... The Economist Events, Innovation Summit scheduled to take place at the ... At the summit, the award winners will share their experiences and ... people who have made a proven innovation over the past decade, ... the night before the summit. It will be the ...
(Date:9/29/2014)... A new study confirms that the exposure to tar ... than of regular cigarettes. Similarly, exposure to nicotine ... increasingly popular type of cigarette in several countries around ... of certain toxic chemicals in the smoke of these ... because lower levels of chemicals in the smoke are ...
(Date:9/29/2014)... Monday, September 29: Between 1970 and 2010 ... around the globe dropped 52 percent, says the ... Wildlife Fund (WWF). This biodiversity loss occurs disproportionately ... use of high-income countries. , In addition to ... data point to other warning signs about the ...
Breaking Biology News(10 mins):Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 2Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 3Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 4Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 5Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 6Hear from The Economist's 2014 Innovation Award Winners at Innovation Summit on October 10th in Hong Kong 7Slim cigarette smokers not exposed to more harmful chemicals 2Half of global wildlife lost, says new WWF report 2
... Alaska - University of Alaska Museum of the North ... summer working with a Norwegian research team to excavate ... of Svalbard. At the time, they knew the Jurassic ... conserving the specimen at the Natural History Museum at ...
... recently developed a new modeling approach to estimate sea ... on historical observations. The model was developed ... Russian Academy of Sciences, Moscow. Using this ... estimated from 1982 to 2003. Results showed that average ...
... endemic to healthy corals could change depending on the ... matter in seawater, report researchers from The University of ... Laboratory in Sarasota, Florida. Healthy corals naturally exude ... of bacteria exists. Recent studies have indicated that ...
Cached Biology News:International team announces discovery of massive Jurassic marine reptile 2New method to estimate sea ice thickness 2Dissolved organic matter in the water column may influence coral health 2
(Date:9/30/2014)... Lyme Research Alliance (LRA), the nation’s ... universities, today announced the awarding of seven grants worth ... cure for Lyme and other tick-borne diseases. , ... its history—over 20 grant proposals—a 100 percent increase from ... receive so many solid applications from talented scientists this ...
(Date:9/30/2014)... 2014 Rainbow Scientific, Inc. (RSI), ... recently opened an online store to add customer ... lines developed and manufactured by Biological Industries, Inc. ... Biological Industries’ Nutristem® serum-free, xeno-free reagents for human ... cell (hESC) culture. , The online store ...
(Date:9/30/2014)... (PRWEB) September 30, 2014 UFP ... and specialty packaging has recently introduced a custom ... Suspension Pack . The new insulated shipper solves ... chain distribution process. UFP Technologies’ BioShell is a ... bags during storage, handling and shipping. The insulated ...
(Date:9/30/2014)... Back in the 1970’s, many companies calculated ... employee, which included space for circulation and file storage. ... partner at Nidea Corporate Real Estate / ITRA Global ... year 2000, however, 250 square feet per employee became ... down to 175 to 225 square feet, and over the ...
Breaking Biology Technology:Lyme Research Alliance Awards Nearly $600,000 in New Grants 2Lyme Research Alliance Awards Nearly $600,000 in New Grants 3Lyme Research Alliance Awards Nearly $600,000 in New Grants 4Rainbow Scientific, Inc. opens online store for state-of-the-art stem cell culture and cytogenetic reagents 2UFP Technologies Introduces Insulated Shipping Container For Bulk Drug Transportation 2UFP Technologies Introduces Insulated Shipping Container For Bulk Drug Transportation 3ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 2ITRA Global Reports on How Companies Are Squeezing More Employees into Less Office Space 3
... Leading biotechnology,company Novozymes reports 13% sales growth in 2008. Earnings were ... an uncertain market.,Strong long-term trends lead to new, increased targets and ... - 2008 sales up by 13% in local currencies (LCY), ... - Sales growth of 5% in LCY and 10% ...
... number and dimension of particles or droplets as they actually exist ... and possibly unique, changes that are of critical importance to the ... with the knowledge, information and best practices you need to maximize ... ...
... AMSTERDAM, January 22 Avantium Technologies announces the,launch of ... industry. The system will be marketed under the name,Crystalline. ... designed to address the need in the pharma,industry to ... early in the,development cycle. , ...
Cached Biology Technology:Novozymes Reports Strong 2008 Results 2Maximize Data Analysis with METTLER TOLEDO FBRM 2Avantium Launches the Crystalline, a New Parallel System for Crystallization Research 2