Navigation Links
Species unique to single island should not be rare there
Date:4/12/2011

Animal and bird species found only on a single island should still be common within that island.

This is the finding of a new model developed by researchers from the University of Leeds and Imperial College London. The model could apply both to actual islands and isolated areas of habitat on the mainland that are home to unique species, such as the table top mountains of South America.

The natural history of islands is littered with examples of unusual species found only in one place, such as the Hawaiian Goose, Galpagos Tortoises and Dodo that may once have been common on their islands, but since human contact have become rare or even extinct. Now this new modelling approach shows that in general, most unique island species should be common on their island. If they are not, then the researchers believe human activity is most likely to be the cause.

"Models of island ecology have tended to focus on the total number of different species that you might expect to find on an island, rather than on how common or rare those species are and whether or not they are unique to the island," says Dr James Rosindell, of Leeds' Faculty of Biological Sciences. "Our model is able to predict the way that new species develop in isolation from the mainland as well as how many individuals of each species we could expect to see in their natural habitat. However, there is little data on population sizes and this highlights a real gap in knowledge that we need to fill."

To develop the model, the researchers collated data on bird species found across 35 islands and archipelagos. Modern genetics makes it possible to identify which species have diverged to create new species so the team were able to test their model against actual data.

The model and data both show that whilst islands close to the mainland have no unique species, more distant islands tend to have unique species that are closely related to mainland species. Only the islands and archipelagos furthest from the mainland are expected to contain large numbers of unique species closely related to each other, such as Darwin's finches on the Galpagos and the Hawaiian honeycreepers.

"This model is still in its early stages of development, but we hope it will help to prompt more study of population sizes on islands," says Dr Albert Phillimore, from Imperial's Department of Life Sciences. "Comparing the predictions of different models to actual data can help us to identify where other factors are coming into play such as additional ecological processes and human intervention. In the future, we plan to look at how the model could also help make predictions relevant to conservation strategy."


'/>"/>

Contact: Jo Kelly
jo@campuspr.co.uk
44-113-258-9880
University of Leeds
Source:Eurekalert

Related biology news :

1. Study finds remarkable diversity of lichen species in Florida state park
2. Beetle explorers name new species for Roosevelt
3. Insect scientists battle invasive species in Hawaii
4. Intervention offers best chance to save species endangered by climate change
5. Maquipucuna cloud forest in Ecuador yields new species of yeast
6. DNA better than eyes when counting endangered species
7. Oldest species of a marine mollusc discovered
8. Shellshock: New report lists 25 most endangered turtle species
9. First harmful algal bloom species genome sequenced
10. Brown tide culprit sequenced: Genome of the first of algal bloom species
11. New scholarly paper reveals 100 new species of lichenized fungi
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/11/2016)... , March 11, 2016 ... new market research report "Image Recognition Market by Technology ... (Marketing and Advertising), by Deployment Type (On-Premises and Cloud), ... To 2022", published by MarketsandMarkets, the global market is ... to USD 29.98 Billion by 2020, at a CAGR ...
(Date:3/10/2016)... BLUE BELL, Pa. , March 10, 2016   ... U.S. Customs and Border Protection (CBP) is testing ... in San Diego to help identify ... United States . The test, designed to help determine ... outdoor, pedestrian environment, began in February and will run until ...
(Date:3/9/2016)... HAMBURG, Germany , March 9, 2016 ... African country,s government identified that more than 23,000 public ... name or had been receiving their salary unlawfully.    ... West African country,s government identified that more than 23,000 ... recorded name or had been receiving their salary unlawfully. ...
Breaking Biology News(10 mins):
(Date:5/4/2016)... ... May 04, 2016 , ... Looking for ... San Diego’s premiere hands-on cooking experience. Offering everything from gourmet cooking classes to ... she won’t forget. , Guests that visit LaJollaCooks4u share an experience unlike any ...
(Date:5/4/2016)... , May 4, 2016  Bayer today announced ... compound Stivarga ® (regorafenib) tablets for the ... has met its primary endpoint of a statistically ... RESORCE, evaluated the efficacy and safety of regorafenib ... after treatment with sorafenib. The safety and tolerability ...
(Date:5/4/2016)... 4, 2016 According to a ... Market - Global Industry Analysis, Size, Share, Growth, Trends, ... anticipated to expand at a CAGR of 17.1% from ... 2024. Metabolomics is the extensive study of ... tissues or organisms. Together, these small molecules and their ...
(Date:5/4/2016)... ... May 04, 2016 , ... Nutrafol®, a first-to-market ... treat hormonal and stress related hair loss. With patent-pending formulas for both female ... opinion leaders in the medical and salon channels nationwide. , Dermatologists, Plastic ...
Breaking Biology Technology: