Navigation Links
Glaciations may have larger influence on biodiversity tan current climate
Date:6/8/2011

The study, published yesterday in the journal Ecology Letters, analyzed the species richness and the structure of their communities throughout the different regions of the European territory from the Ural Mountains to the Iberian Peninsula. The selection of this family of insects was motivated by their high dispersal ability and because their food sources (mainly cattle and sheep dung) are present throughout the continent.

Research by the Spanish National Research Council reveals that the large impacts occurred during the last ice age maintain their effects on the current distribution of dung beetles of the scarab family. The presence of these beetles in Europe seems to be more influenced by the climate of that glaciation than by the present one.

Scarabs are insects of tropical origin that cannot survive below 0 C mean annual temperature, "so it could be expected that their presence gradually decreases as temperatures drop down northwards " says the researcher from the National Museum of Natural Sciences, CSIC, Joaqun Hortal. However, the analysis of the relationship between the magnitude of climate change since the last glaciation and the distribution of scarabs evidences that these insects are not evenly distributed according to this gradient, but rather show two different patterns, one in the north and one in the south. Horton said: "The border defining the two areas is almost similar to the limit of 0 C of mean annual temperature at the time of the last ice age." (See Figure 1)

Although scarab species richness is actually lower in the north that in the south, another two characteristics can be explained under the hypothesis of the influence of the last ice age.

The first one is based on the species present throughout Europe. Data show that all scarab species living in the northern territory above the border defined by the 0 C limit in the last glaciations are also present in the south, and there is no species exclusive to the northernmost area. According to Hortal, "this is an effect of the difficulty of adapting to cold climate that still exists, as the north does not hold unique species adapted to the cold."

This feature is consistent with the second observation, based on the age of the species present in each area. The study results show that the species that have been able to re-colonize the north are also those that have evolved most recently." Although the adaptation to cold climates started before the last glaciation, these species belong to the newer phylogenetic branches of the Scarabaeidae," says the researcher from CSIC.

Joint influence

The current distribution of scarabs in Europe demonstrates, therefore, that certain influence of the last ice age is still maintained. According to Hortal, "it is not that the current climate does not affect biodiversity, but rather that the impact of past climate change is hiding under the influence of present conditions." The reason why such impact has not been detected so far is that both cause similar effects, i.e., less species in the North of Europe. The CSIC researcher says that: "current biodiversity patterns are therefore a mixture of past climate effects, current conditions and the evolutionary history of the species."

The results of this investigation show that the consequences of major climate changes persist over a very long term. According to Hortal, "this work should be taken into account when analyzing and forecasting the consequences of the global warming currently experienced by the Earth." The researcher concludes: "If the temperature continues to rise, some climates that never occurred during the recent history of our planet may appear, and we do not know which species, both animal and plant, will be able to adapt to them; in fact, it is possible that many of them will not be able to live in these new climates."


'/>"/>

Contact: Marta del Amo
m.delamo@orgc.csic.es
34-915-681-471
CSIC, Consejo Superior de Investigaciones Cientficas
Source:Eurekalert  

Related biology news :

1. Glaciations may have larger influence on biodiversity than current climate
2. Microfossils challenge prevailing views of the effects of Snowball Earth glaciations on life
3. Undergraduate institutions should play larger research role
4. Larger female hyenas produce more offspring
5. Kenyas fisheries management promotes species that grow larger and live longer
6. How plants counteract against the shade of larger neighbors
7. Plants play larger role than thought in cleaning up air pollution
8. Climate change causes larger, more plentiful marmots, study shows
9. Apples grow larger when cells dont divide, study shows
10. NOAA-supported scientists predict larger than average Gulf dead zone
11. Reseachers predict larger-than-average Gulf dead zone; impact of oil spill unclear
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Glaciations may have larger influence on biodiversity tan current climate
(Date:11/24/2016)... 23, 2016 Cercacor today introduced Ember TM ... trainers non-invasively measure hemoglobin, Oxygen Content, Oxygen ... Respiration Rate in approximately 30 seconds. Smaller than a ... immediate access to key data about their bodies to ... regimen. Hemoglobin carries oxygen to muscles. ...
(Date:11/22/2016)... Minn. , Nov. 22, 2016   MedNet ... supports the entire spectrum of clinical research, is pleased ... Medical LiveWire Healthcare and Life Sciences Awards ... award caps off an unprecedented year of recognition and ... trials for over 15 years. iMedNet ...
(Date:11/19/2016)... 18, 2016 Securus Technologies, a leading provider ... safety, investigation, corrections and monitoring, announced today that it ... to have an independent technology judge determine who has ... high tech/sophisticated telephone calling platform, and the best customer ... do most of what we do – which clearly ...
Breaking Biology News(10 mins):
(Date:12/7/2016)... , Dec. 7, 2016  Genprex, Inc. a ... immunogene therapy treatments, today announced that it has ... a leading strategic communications and advisory firm, to ... The program will combine investor relations, public relations ... raising the profile of Genprex and its lead ...
(Date:12/7/2016)... ... December 07, 2016 , ... ... today a new service to enable rapid migration of large pathology data sets ... one of the factors limiting adoption of digital pathology. Proscia’s free massive dataset ...
(Date:12/6/2016)... Dec. 6, 2016 /PRNewswire/ - SQI Diagnostics Inc. ("SQI" or the "Company") ... the fourth quarter and fiscal year ended September 30, 2016. ... , , ... life sciences and diagnostics company that develops and commercializes proprietary technologies ... Achieved revenues of $1.4 million more than tripling ...
(Date:12/6/2016)... ... December 06, 2016 , ... Symbios Technologies, Inc. , ... company has engaged in a collaborative research partnership with Colorado State University (CSU) ... of the Vice President for Research. This agreement is designed to further the ...
Breaking Biology Technology: