Navigation Links
Insects hold atomic clues about the type of habitats in which they live
Date:2/16/2011

Scientists have discovered that insects contain atomic clues as to the habitats in which they are most able to survive. The research has important implications for predicting the effects of climate change on the insects, which make up three-quarters of the animal kingdom.

Applying a method previously only used to examine the possible effects of climate change on plants, scientists from the University of Cambridge can now determine the climatic tolerances of individual insects. Their research was published today, 16 February, in the scientific journal Biology Letters.

Because insects are at constant risk of desiccation, they have a waterproof exoskeleton which protects them from dehydration. Therefore, measuring hydration levels in an insect gives little if no indication of the type of habitat they live in (for example, whether it is humid or dry). Moreover, most insects live in the undergrowth, or in the soil; in tropical rainforests the insects live many hundreds of feet up in the canopy, which makes it very difficult to observe them directly. Using the atmospheric imprint, it will now be possible to decipher the habitat preferences of individual insects no matter where they live.

By taking advantage of a unique property of the oxygen isotopes in water; namely that the isotopes behave differently during evaporation and condensation, the researchers were able to determine how much water an insect loses when it 'breathes' through holes in its outer skeleton called spiracles, providing important insight into the type of atmosphere (for example, humid like the rain forest) it could survive.

Water (H20) is made up of two types of oxygen 18O and 16O. Because 16O is lighter, when water evaporates it leaves behind more 18O. Using cockroaches, the scientists measured the levels of the two different oxygens in the insects' circulatory fluid - called haemolymph - as well as in their outer skeleton. From this information they were able to determine how much water had evaporated and therefore identify the atmospheric conditions necessary for the insect to survive.

Insects living in a dry atmosphere have a higher concentration of 18O as a result of a greater water loss. Insects living in very humid conditions tend to lose less water and therefore have a nearly equal ratio of 16O to 18O. With this new method, researchers will be able to predict where species are most likely to survive (e.g. in Sahara-desert dry and rainforest humid), and will be able to pinpoint with great accuracy which species share the most similar niches.

"There is an urgent need for a better understanding of how global environmental change will affect threatened plants and animals," said Dr Farnon Ellwood, lead author of the paper. "If we can determine the habitat preferences of individual insects, we can use this information to predict how climate change will impact on a group representing three-quarters of the Earth's animal species."


'/>"/>

Contact: Genevieve Maul
Genevieve.maul@admin.cam.ac.uk
44-122-376-5542
University of Cambridge
Source:Eurekalert

Related biology news :

1. New Anglo-Swiss research questions impact of GM wheat on insects
2. Mechanisms of juvenile hormone action in insects could help fine tune pesticides
3. Raising giant insects to unravel ancient oxygen
4. Artificial bee eye gives insight into insects visual world
5. ARS, industry cooperation yields device to detect insects in stored wheat
6. Solar panels can attract breeding water insects
7. New research indicates plants can grow quickly or ward off hungry insects, but not both
8. Insects and sex: Educational help from the museum
9. New assay helps track termites and other insects
10. Where did insects come from?
11. Conservation from space: Landscape diversity helps to conserve insects
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/9/2016)... , June 9, 2016  Perkotek an innovation leader in attendance control systems ... seamlessly log work hours, for employers to make sure the right employees are actually ... http://photos.prnewswire.com/prnh/20160609/377486LOGO ... ... ...
(Date:6/2/2016)... -- The Department of Transport Management (DOTM) of ... US Dollar project, for the , Supply and ... and IT Infrastructure , to Decatur ... of Identity Management Solutions. Numerous renowned international vendors participated in ... was selected for the most compliant and innovative solution. ...
(Date:5/24/2016)... superior patient care by providing unparalleled technology to leaders of the medical imaging industry. ... recently added to the range of products distributed by Ampronix. Photo - ... ... ... ...
Breaking Biology News(10 mins):
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle Marche in ... peritoneal or pleural mesothelioma. Their findings are the subject of a new article on ... biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma patients that ...
(Date:6/23/2016)... Wausau, WI (PRWEB) , ... June 23, 2016 ... ... probiotic supplements, is pleased to announce the launch of their brand, UP4™ Probiotics, ... supplements for over 35 years, is proud to add Target to its list ...
(Date:6/23/2016)... /PRNewswire/ - FACIT has announced the creation of ... company, Propellon Therapeutics Inc. ("Propellon" or "the Company"), ... portfolio of first-in-class WDR5 inhibitors for the treatment ... represent an exciting class of therapies, possessing the ... cancer patients. Substantial advances have been achieved with ...
(Date:6/23/2016)... , June 23, 2016 Houston ... with the Cy-Fair Sports Association to serve as ... the agreement, Houston Methodist Willowbrook will provide sponsorship ... and connectivity with association coaches, volunteers, athletes and ... with the Cy-Fair Sports Association and to bring ...
Breaking Biology Technology: