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:10/16/2014)... Institute of Marine Science have received a 3-year, ... identify the streams and wetlands most vulnerable to ... local governments and citizens conserve these important ecosystems. ... of tidal-marsh observations first gathered by VIMS scientists ... can today,s researchers accurately map the slow but ...
(Date:10/16/2014)... causes severe respiratory tract infections and worldwide claims ... at VIB and Ghent University have succeeded in ... common virus infection. , Xavier Saelens (VIB/UGent): ... the way for the development of a novel ... causes suffering in numerous small children and elderly ...
(Date:10/15/2014)... to assess the pandemic risk from strains of influenza ... not allow ourselves to become complacent that the most ... of scientists. , Influenza pandemics arise when a new ... develop widespread immunity – spreads in the human population. ... 100 years, the worst of which – the 1918 ...
Breaking Biology News(10 mins):EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3New perspectives for development of an RSV vaccine 2Scientists 'must not become complacent' when assessing pandemic threat from flu viruses 2
... (Toronto) New research from the Centre for Addiction ... (SickKids), both in Toronto, Canada provides further clues as to ... than females. The scientists discovered that males who carry specific ... at high risk of developing ASD. The research is published ...
... Life After Cancer Epidemiology (LACE) study, 1,897 participants diagnosed ... recruited on average 2 years post-breast cancer diagnosis were ... cancer recurrence and death. The women, who were ... 7.4 years. The study reported an increase in ...
... 2010 -- New insight into the structure of switchgrass ... more efficient methods to turn biomass into biofuel. ... Laboratory and Georgia Tech used small-angle neutron scattering to ... lignocellulose from switchgrass. Pretreatment is an essential step to ...
Cached Biology News:Link to autism in boys found in missing DNA 2Neutrons helping ORNL researchers unlock secrets to cheaper ethanol 2
(Date:10/22/2014)... Oct. 22, 2014 Research and ... "Global DNA Diagnostics Market (Product types, Application, ... Global Trends, Company Profiles, Demand, Insights, Analysis, Research, ... report to their offering. ... applications, techniques, end users and Geography) Global Size, ...
(Date:10/22/2014)... 21, 2014 The North American crystal ... North America with analysis and forecast of revenue. This ... is expected to reach $623.6 million by 2018, at ... Browse through the TOC of the North American crystal ... in-depth analysis provided. This also provides a glimpse of ...
(Date:10/22/2014)... WriteResult, LLC – a premier ... working with a team of researchers from Yale University’s ... Farming Collaborative to provide electronic questionnaire data collection through ... which started in May, aims to evaluate the impact ... exposure to and participation in urban agriculture to impact ...
(Date:10/22/2014)... October 22, 2014 Physicians Choice ... cardiovascular pharmacogenetics menu, which enables healthcare providers to ... With PCLS’s evidence-based results, healthcare providers are better ... their therapy, while minimizing risks for adverse drug ... according to the FDA [1] more than 2.2 ...
Breaking Biology Technology:Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 2Global DNA Diagnostics Market (Product types, Application, Technology, End User and Geography) - Forecast to 2020 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 2The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 3The North American crystal oscillator market is expected to reach $623.6 million by 2018 - New Report by MicroMarket Monitor 4myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 2myPROpad™ Topic of Panel Discussion at the Yale Food Systems Symposium 3PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 2PCLS Announces Expansion of Cardiovascular Pharmacogenetic Testing Menu 3
... Waukesha, Wis. -- Prodesse, Inc. ... and that it has completed a major process improvement ... a group of its core investors, plus three new ... The offering is composed of a debt instrument convertible ...
... Place , the University of Wisconsin-Madison's astronomy outreach center, will ... Sunday, Aug. 28. Opening week activities continue through Thursday, Sept. ... , ,"We had pretty much outgrown our other place where ... programming, our attendance has increased steadily every year, and our ...
... every biologist knows that men and women truly are different. ... those differences come to the fore: around 80 percent of ... behaviors also differ greatly between the sexes - just about ... ,Early in human development, critical brain proteins known as steroid ...
Cached Biology Technology:Prodesse gets new funding; improves flu assay 2Space Place opens new astronomy center 2Gender hormones may lend to social disorder therapies 2
... Agencourt AMPure is a magnetic ... requires no sample transfer, centrifugation ... purifies small and large PCR ... 384-well microplates. Agencourt AMPure can ...
... These 1.5L PYREX trypsinizing ... homogenous tissue samples into cell ... proteins. Heavy beaded neck accepts ... enhance vigorous agitation. • Height ...
... The kit for stabilizing 50g of purified ... StabMRT Plus Kit delivers all of the advantages ... but in addition the RNA can be used ... , This product has been optimised for the ...
... PYREX Fernbach-style culture flasks have triple baffles ... bottom to achieve maximal oxygen transfer to ... marking spot., A wide range of optional ... Polypropylene colored caps for ease of ...
Biology Products: