Navigation Links
What triggers mass extinctions? Study shows how invasive species stop new life
Date:12/30/2010

previous studies, Stigall used phylogenetic analysis, which draws on an understanding of the tree of evolutionary relationships to examine how individual speciation events occurred.

She focused on one bivalve, Leptodesma (Leiopteria), and two brachiopods, Floweria and Schizophoria (Schizophoria), as well as a predatory crustacean, Archaeostraca.

These small, shelled marine animals were some of the most common inhabitants of the Late Devonian oceans, which had the most extensive reef system in Earth's history.

The seas teemed with huge predatory fish such as Dunkleosteus, and smaller life forms such as trilobites and crinoids (sea lilies).

The first forests and terrestrial ecosystems appeared during this time; amphibians began to walk on land.

As sea levels rose and the continents closed in to form connected land masses, however, some species gained access to environments they hadn't inhabited before.

The hardiest of these invasive species that could thrive on a variety of food sources and in new climates became dominant, wiping out more locally adapted species.

The invasive species were so prolific at this time that it became difficult for many new species to arise.

"The main mode of speciation that occurs in the geological record is shut down during the Devonian," said Stigall. "It just stops in its tracks."

Of the species Stigall studied, most lost substantial diversity during the Late Devonian, and one, Floweria, became extinct.

The entire marine ecosystem suffered a major collapse. Reef-forming corals were decimated and reefs did not appear on Earth again for 100 million years.

The giant fishes, trilobites, sponges and brachiopods also declined dramatically, while organisms on land had much higher survival rates.

The study is relevant for the current biodiversity crisis, Stigall said, as human activity has introduced a high number of invasive species int
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Hebrew University scientists reveal mechanism that triggers differentiation of embryo cells
2. Host shift triggers cascading effect on ecosystem, research finds
3. Common chemotherapy drug triggers fatal allergic reactions
4. Protein that triggers plant cell division revealed by researchers
5. EPA grant to University of Chicago for research on food allergy triggers
6. Impaired transport in neurons triggers prion disease
7. New on-off switch triggers and reverses paralysis in animals with a beam of light
8. Exposure to young triggers new neuron creation in females exhibiting maternal behavior
9. New on-off switch triggers and reverses paralysis in animals with a beam of light
10. Once bitten, twice shy -- a temperature switch triggers aversive memory
11. Fighting cancers by tagging their triggers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
What triggers mass extinctions? Study shows how invasive species stop new life
(Date:6/15/2015)... 2015 According to a new ... (Rule-Based, Statistical, and Hybrid), Technologies (Recognition, IVR, OCR, Pattern ... by MarketsandMarkets, The Natural Language Processing Market is expected ... 18.4% for the forecast period 2015-2020. ... igures spread   through 155 P ages ...
(Date:6/12/2015)... , June 12, 2015  Securus Technologies, ... technology solutions for public safety, investigation, corrections and ... its patent to electronically capture, analyze and identify ... facial recognition methods. This system can: ... by an enrollment and subsequent sign-on process is ...
(Date:6/9/2015)... 9, 2015   MedNet Solutions , an innovative ... of clinical research, will be providing demonstrations of its ... the 2015 Drug Information Association (DIA) Annual Meeting in ... These presentations will include previews of many exciting new ... upcoming iMedNet 2015 Feature 1 Release. ...
Breaking Biology News(10 mins):Natural Language Processing Market Worth $13.4 Billion by 2020 2Natural Language Processing Market Worth $13.4 Billion by 2020 3Natural Language Processing Market Worth $13.4 Billion by 2020 4Natural Language Processing Market Worth $13.4 Billion by 2020 5Securus Announces Patent Issued for Authorized Presence Verification During Video Visitation 2MedNet To Provide Sneak Peeks Of Its iMedNet "2015 Feature 1 Release" At The DIA Annual Meeting 2MedNet To Provide Sneak Peeks Of Its iMedNet "2015 Feature 1 Release" At The DIA Annual Meeting 3
... DURHAM, NC -- A difference at the smallest level of DNA ... whether you find a given smell pleasant. A different amino acid ... finds the same odor offensive, according to researchers at Duke University. ... our noses, and according to the 1000 Genomes Project, there are ...
... 13, 2013 -- Ultrasound-stimulated microbubbles have been showing promise ... up dangerous blood clots. But though many researchers have ... understood about why it works. Now a team of ... showing how these wiggling microbubbles cause a blood clot,s ...
... is used by plants to build their tissues, and when plants ... If the way of cultivating the earth can be optimized to ... the form of CO2, it will be contributing towards cutting greenhouse ... and climate change. The Soil Management Group of the Public University ...
Cached Biology News:No 2 people smell the same 2Project on sustainable management and gas emission reduction in irrigation farming 2Project on sustainable management and gas emission reduction in irrigation farming 3
(Date:7/1/2015)... ... July 01, 2015 , ... A newly launched business plan contest will ask ... to innovation in life sciences R&D. The Pistoia Alliance President’s Startup Challenge 2015 will ... and a period of expert mentorship from a senior industry figure drawn from the ...
(Date:7/1/2015)... IN (PRWEB) , ... July 01, 2015 , ... Apex ... 2015 BIO International Convention in Philadelphia, PA. , The presentation took place ... and outlined the plans for the development of APX3330 for the treatment of pancreatic ...
(Date:7/1/2015)... NEW YORK , July 1, 2015 /PRNewswire/ ... G ), a global leader in designing, ... the Aecus Innovation Award in recognition of their ... operational efficiencies in UCB,s global business services (GBS) ... acknowledge service providers and clients that work together ...
(Date:6/30/2015)... ... June 30, 2015 , ... Students ... part in the first half of “Integrative Biotechnology,” an applied biotechnology course team-taught ... summer 2014, this course combines students from both universities and is taught on ...
Breaking Biology Technology:Pistoia Alliance Launches Startup Challenge 2Pistoia Alliance Launches Startup Challenge 3Apex Therapeutics Presented Company Overview at This Year’s BIO International Convention in Philadelphia, PA 2UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 2UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 3UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 4UCB and Genpact Receive Aecus Innovation Award for Success in Global Business Services 5Rivier University and Beijing City University Academic and Cultural Exchanges Begin 2
... SHANGHAI, July 6 /PRNewswire-Asia/ -- Sundia MediTech Company, ... Shanghai,China announced today that Sundia has acquired Protein Folding ... drug discovery from,Microtech Nano LLC, a R&D Company in ... deal, Dr. Jiaan Yang, the founder and President of ...
... PORT, Guernsey and LONDON, July 6 , ... Platform Addressing,Areas of Major Unmet Need, Including Hospital Acquired Infections ... Holdings Advisors LLP ("CPHA"), the advisor to the second,Celtic Pharma ... in a majority shareholding in Novacta Biosystems Limited,("Novacta"), which is ...
... Reich, an ALS patient from Piedmont, California, will attend both ... baseball games this July 4th as a representative of the ... both baseball games to raise awareness of amyotrophic lateral scleroses ... suffers and for which there is no known cause or ...
Cached Biology Technology:Bioinformatics Expert Dr. Jiaan Yang Joins Sundia MediTech With Innovative PFSC Technology 2Celtic Pharma Holdings Announces Investment in Novacta Biosystems Limited 2Celtic Pharma Holdings Announces Investment in Novacta Biosystems Limited 3Celtic Pharma Holdings Announces Investment in Novacta Biosystems Limited 4Celtic Pharma Holdings Announces Investment in Novacta Biosystems Limited 5Bay Area Youth to Represent ALS Patients at Giants' and Angels' Baseball Games on July 4th 2Bay Area Youth to Represent ALS Patients at Giants' and Angels' Baseball Games on July 4th 3
... and miRNA Isolation Traditional mRNA isolation ... and can result in the loss of ... miRNA Isolation Kit purifies all RNA species ... Through an enrichment procedure included in the ...
anti-JNK2 Immunogen: Recombinant human JNK2 protein Accession Number: NM_002752 Quality Assurance: Routinely evaluated by immunoblot. Molecular Weight: 46 and/or 54 kDa Available ...
... Clone/PAD: ZMD.330. Immunogen: Synthetic peptide ... of rat and mouse protein kinase C ... the rat and mouse PKCzeta protein. ... does not cross-react with PKCiota/lambda. Reactivity: ...
Lipid-rich bovine serum albumin for cell culture. It is chromatographically purified and has an IgG content 1.0% (w/w)....
Biology Products: