Navigation Links
Global survey of lizards reveals greater abundance of animals on islands than on mainland ecosystems

research conducted by Ted Case at UCSD and others on small groups of islands had found that islands?limited areas and isolation can reduce predation and competition pressures. As a result, island animals were able to reach exceptionally high densities.

In their study, Jetz and Buckley confirmed that reduced numbers of predators and competitors accompany high lizard densities on islands across the world. The two biologists concluded that an average acre of mainland contains 52 lizards while an island acre contains 777 lizards. This difference in density persisted when the scientists controlled for location and environmental conditions.

“The ecology of islands is particularly important because, while the world’s more than 100,000 islands constitute only 7 percent of the global land surface, they contain many of the earth’s species with numerous species restricted to single islands,?says Buckley. ?00 million people depend on island ecosystems for their food and livelihoods.?

The study suggests that islands are particularly sensitive to the loss and gain of species. Species introductions have had dramatic consequences for islands. Introduced mongooses have devastated island populations of lizards and introduced snakes have caused the loss of birds and lizards on islands.

“Cases of species introductions wreaking havoc on islands are likely to become more common as the islands face increasing pressures from population growth, tourism, development, and climate change,?says Jetz. “The consequences of island vulnerability have already been observed as island species account for half of known animal extinctions and a full 90 percent of known bird extinctions in the last 400 years. Our study suggests that islands will continue to be vulnerable worldwide.?

“Many people, myself included, enjoy visiting islands for their spectacular wildlife,?adds Buckley. “Our research suggests that we must be particularly careful to limi
'"/>

Source:University of California - San Diego


Page: 1 2 3

Related biology news :

1. Global analysis of membrane proteins
2. Global warming increases oyster sensitivity to pollution
3. Grand Challenges in Global Health initiative funds Yale project
4. Global study shows all tobacco bad for the heart
5. Global warming may warrant new approaches to ecosystem restoration
6. Global warming may have damaged coral reefs forever
7. Global malaria map key weapon in fight against malaria, scientists say
8. Global changes alter the timing of plant growth, scientists say
9. Global map shows new patterns of extinction risk
10. Global sunscreen has likely thinned, report NASA scientists
11. Center releases new public survey on stem cells
Post Your Comments:
(Date:7/11/2014)... Mills Canyon fire started near the City of Entiat ... local resources, the fire quickly grew to over 1,000 ... of the fire is under investigation by the Washington ... working with existing local resources in developing fire control ... Service (USFS), Washington State Department of Natural Resources, (WA ...
(Date:7/11/2014)... Institute of Standards and Technology (NIST) need a ... they often prove that necessity is truly the ... for M. Lorna De Leoz and Stephen Stein, ... glycomics. Glycomics is the study of the abundant, ... to proteins and lipids and influence cellular processes, ...
(Date:7/11/2014)... Researchers from Ume University, Sweden, have explored two ... the reaction sequence leading to the formation of ... been published in the scientific journal Nature ... improving present day synthetic catalysts for water oxidation, ... devices for the direct storage of solar energy ...
Breaking Biology News(10 mins):Molecular snapshots of oxygen formation in photosynthesis 2
... release is available in Spanish . , ... processes, but also those that do not. This is why ... healthy cells. With this aim in mind, a team from ... of the C1P molecule. Today two types of ...
... N.Y. New tires allow race cars to take tight ... similar advantages: They are not necessary for basic flight but ... "To escape a predator, you don,t have to be fast, ... a world authority on animal behavior, ecology and evolution and ...
... pollution has already spurred public health officials to advise eating ... in a warmer world. So suggests a paper that ... . Sue Natali, a postdoctoral associate in botany at ... mercury levels in soils under trees growing in air enriched ...
Cached Biology News:The quest for specific anti-inflammatory treatment 2The quest for specific anti-inflammatory treatment 3Hind wings help butterflies make swift turns to evade predators, study finds 2To climate-change worries, add 1 more: Extended mercury threat 2To climate-change worries, add 1 more: Extended mercury threat 3
(Date:7/10/2014)... EvoDerma ’s NOOME Anti-Aging Motion has been upgraded ... with a second treatment cup to help prevent and smooth ... is thinner on the edges for a softer contact with ... uneven surfaces on the face, neck and décolleté. Choose to ... areas such as the cheeks and neck, or opt for ...
(Date:7/10/2014)... 10, 2014  Franciscan St. Anthony Health-Crown ... for respiratory monitoring outside the operating room, ... in embracing state-of-the-art patient safety technology. ... breathing and can alert medical caregivers when ... amount of carbon dioxide the patient is ...
(Date:7/10/2014)... 2014  Kainos Capital, a firm specializing in acquiring ... it has acquired the Slim-Fast brand from Unilever. Unilever ... of the transaction were not disclosed. Slim-Fast ... that markets ready-to-drink shakes, powders, bars and snacks to ... and in the United Kingdom ...
(Date:7/10/2014)... , July 10, 2014 Research and ... of the "International Photonic Integrated Circuit (Monolithic ... to 2019" report to their offering. ... The concept of photonic integration traces its roots ... The promise of photonic integration went unexplored and ...
Breaking Biology Technology:Introducing a New Bonus Treatment Cup for EvoDerma’s NOOME Anti-Aging Motion 2Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2Kainos Capital Acquires Slim-Fast From Unilever 2International Photonic Integrated Circuit (Monolithic Integration, Hybrid Integration, Module Integration) Market - Forecasts to 2019 2
... Nov. 20 Amicus Therapeutics,(Nasdaq: FOLD ) today ... will present a corporate update at the Lazard Capital,Markets ... Tuesday,November 27th at 11:30 am ET at The New ... of the presentation will be available to all,interested parties ...
... Massachusetts and RAMBOUILLET, France,November 20 ... model-based,vision software for musculoskeletal radiography, and ... High Resolution Digital Radiology for osteoarticular,imaging, ... joint and bone,tissues, announced today the ...
... Completion of Strategic Acquisition Reflected in Q3 Results, ... Board: ECTE) today announced financial results for the,third quarter ... 30,2007, net loss was $8,677,000 or $.70 per share, ... period in 2006. For the nine months ended,September 30, ...
Cached Biology Technology:Amicus Therapeutics to Present at the Lazard Capital Markets Fourth Annual Healthcare Conference 2Amicus Therapeutics to Present at the Lazard Capital Markets Fourth Annual Healthcare Conference 3Rapid Quantification of Osteoarthritis With a Novel, Office-Based, High-Resolution Digital Imaging Device 2Echo Therapeutics Reports Third Quarter 2007 Results 2Echo Therapeutics Reports Third Quarter 2007 Results 3Echo Therapeutics Reports Third Quarter 2007 Results 4Echo Therapeutics Reports Third Quarter 2007 Results 5Echo Therapeutics Reports Third Quarter 2007 Results 6
... is a new product number, ... product number. If showing no ... the old Sigma-Aldrich number (Z71,350-3) ... assistance. ID clarifier: rack holds ...
... GX-1000 3-D Shaker , ,Product Information ... of the GyroTwister GX-1000 is extremely efficient, ... general mixing as well as staining gels, ... continuously adjustable across a broad range. A ...
...
... Radiolabeled Ligands\n\nReceptor-related research has long been enabled ... ligands selected to keep pace with new ... products and services for receptor research and ... If you do not find exactly what ...
Biology Products: