Navigation Links
Smaller islands host shorter food chains
Date:11/22/2013

group, i.e. parasitic wasps. "To test ideas about food chain length, you really cannot deal with raw counts of species instead, you need to know which species form actual feeding chains" says Gergely Vrkonyi, an international expert on wasps involved in the project.

"Among the wasps encountered on these islands, we were able to pick out the species truly dependent on the lepidopteran herbivores. As we see it, knowing not just what the species are but what they do in their lives is the key to sensible ecology", emphasizes Gergely.

Hundreds of species examined

"What is unique about our study is that we were able to look at patterns at the level of large species pools across the islands", explains Marko Nieminen, who spent three long summers boating around the islands, sampling insects by light and bait traps.

"Where other people have looked at effects of island size on restricted numbers of species or restricted levels in food chains, we did the full thing across four levels", he specifies. "Overall, we dealt with 200 species of plants, 415 species of lepidopteran herbivores, 42 species of parasitic wasps attacking herbivores and 7 species of wasps attacking parasitic wasps."

Deliberately keeping things simple

"In choosing the islands, we deliberately went for a simple system" says Marko. "Our islands were essentially smallish pieces of rocks with some forest and heathland on them. Historically, they all rose from the sea just some millennia ago, after being submerged and scraped clean of life by the last ice age. This similarity in structure and history allowed us to look at effects of island size, without having to worry about other differences among islands."

Maintaining interactions may be trickier than maintaining species

All three authors worry about the message laid plain by the study: "What this really suggests is that to save ecological interactions, we may need to conserve much larger areas than for j
'/>"/>

Contact: Tomas Roslin
tomas.roslin@helsinki.fi
University of Helsinki
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Creating smaller, and more powerful, integrated circuits
2. The contribution of coding variants to psoriasis much smaller than thought
3. Pacific islands may become refuge for corals in a warming climate, study finds
4. 24 new species of lizards discovered on Caribbean islands are close to extinction
5. Rubbing boulders, fossil mammal teeth, barrier islands, and a change in volcanic behavior
6. Sea level rise: Jeopardy for terrestrial biodiversity on islands
7. Plants unpack winter coats when days get shorter
8. Copper chains: Study reveals Earths deep-seated hold on copper
9. Oil and water: An icy interaction when oil chains are short, but steamy when chains are long
10. Pesticide application as potential source of noroviruses in fresh food supply chains
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Smaller islands host shorter food chains
(Date:9/15/2014)... of wild, domesticated, and domesticated-wild hybridized populations ... found that within 5 to 11 generations, ... wild populations that hybridized with domesticated populations. ... provides evidence that natural selection, over time, ... experience as a result of increased genetic ...
(Date:9/15/2014)... Vuoksi River and the subsequent rapid decrease in the ... revealed thousands of square kilometres of new, fertile land ... University of Helsinki researchers has studied the role that ... interaction between nature and humans. After dramatic shifts in ... changes and gave rise to a new, innovative culture. ...
(Date:9/15/2014)... PA, September 15, 2014 Schizophrenia is generally considered ... shares many risk factors, both genetic and environmental, with ... , The normal path for brain development is determined ... genes and a wide range of environmental factors. , ... patient populations are required in order to map the ...
Breaking Biology News(10 mins):The creation of the Vuoksi River preceded a significant cultural shift 2Brain Development in Schizophrenia Strays from the Normal Path 2
... A mutation in blood stem cells occurs in patients ... at the Moores Cancer Center at the University of ... Cell Biology and Regenerative Medicine and Comprehensive Cancer Center ... The discovery suggests that development of a very specific ...
... colleagues have produced 3-D images of ancient fossils -- 650 ... an achievement that has never been done before. , If ... Earth, Schopf said the techniques he has used, called confocal ... look at microscopic fossils inside the rocks to search for ...
... bone may rely on a few secrets from the ... Berkeley National Laboratory (Berkeley Lab) have harnessed the way ... is four times stronger than material currently used in ... variations of this substance could also be used in ...
Cached Biology News:Mutation in blood stem cells provides clues to cancer development 2Mutation in blood stem cells provides clues to cancer development 3Inside rocks, implications for finding life on Mars 2Secrets of the sea yield stronger artificial bone 2Secrets of the sea yield stronger artificial bone 3Secrets of the sea yield stronger artificial bone 4
(Date:9/15/2014)... The chemistry, taste, and health effects of tea can vary ... the nonprofit American Botanical Council (ABC). Recent research by ... on the phytochemical compounds in tea ( Camellia sinensis ) ... in the Yunnan province of southwestern ... future of medicinal botanicals. Dr. Ahmed,s report on ...
(Date:9/15/2014)... La deuxième édition annuelle de l, ... sur la sensibilisation au plasma) sera célébrée du ... Plasma Protein Therapeutics Association (PPTA) et ... à : , Sensibiliser davantage la ... plasma-aphérèse , Reconnaître la contribution des donneurs ...
(Date:9/15/2014)... Hydro Dynamics, Inc. (HDI) of Rome, ... will be partnering with Proteaf Technologies (Proteaf) of ... implementing its Shock Wave Power Reactor (SPR) cavitation ... flow chemistry through process intensification has been widely ... for decades. The continuous chemistry has been ...
(Date:9/14/2014)... particularly ingenious when it comes to survival strategies. They ... hostile environment, for example during treatment with antibiotics. A ... a protective slime capsule consisting of sugar chains and ... have for the first time created a detailed three-dimensional ... blocks cross the bacterial cell wall, a crucial step ...
Breaking Biology Technology:Tea Taste and Quality Affected by Climate Change 2Tea Taste and Quality Affected by Climate Change 3Tea Taste and Quality Affected by Climate Change 4L' International Plasma Awareness Week célébrera les donneurs et braquera les projecteurs sur les maladies rares 2L' International Plasma Awareness Week célébrera les donneurs et braquera les projecteurs sur les maladies rares 3Hydro Dynamics Partners with the Continuous Flow Chemistry Experts of Proteaf Technologies 2New insights in survival strategies of bacteria 2
... professionals often face the challenge of delivering cost-effective ... both storage and bandwidth efficiency, while providing seamless, ... SecureZip, a new family of products designed for ... a cross-platform environment. The company also introduced a ...
... Inc. announced Wednesday that its net sales are up ... The Milwaukee-based company, which does business as Merge ... the acquisition of RIS Logic, a radiology information systems ... eFilm's picture archiving and communication system, or PACS, used ...
... has announced a new network switch and router ... second, using designs bought from a Wisconsin company. , ... Eau Claire, designs application-specific integrated circuits and systems-on-a-chip. SLE ... System Packet Interface Level 4 Phase 2, or SPI ...
Cached Biology Technology:PKWare launches new enterprise product line, adds new features to PKZip 2PKWare launches new enterprise product line, adds new features to PKZip 3Agilent's new network chip was designed in Wisconsin 2
UBN-1 (C-20)...
P2A4...
pETDuet-1 is designed for the coexpression of two target genes....
... Recognizes K+ Cl- ... shows no significant sequence ... or CCC.,SPECIES REACTIVITIES: The ... conserved in human, mouse, ...
Biology Products: