Navigation Links
Extreme weather threatens rich ecosystems
Date:3/30/2012

Extreme weather such as hurricanes, torrential downpours and droughts will become more frequent in pace with global warming. Consequently, this increases the risk for species extinction, especially in bio diverse ecosystems such as coral reefs and tropical rainforests.

Human impact means that flora and fauna become extinct at a rate 100 times higher than normal. Climate change has been deemed as one of the main causes of species depletion.

A research team in theoretical biology at Linkping University in Sweden has, through the use of mathematical modelling and simulation, studied how the dynamics of different types of ecosystems may be affected by significant environment fluctuations.

Linda Kaneryd, doctoral student and lead author of a study recently published in the journal, Ecology and Evolution, says the results were surprising.

"Several previous studies of food web structures have suggested that species-rich ecosystems are often more robust than species-poor ecosystems. However at the onset of increased environmental fluctuations, such as extreme weather, we see that extreme species-rich ecosystems are the most vulnerable and this entails a greater risk for a so-called cascading extinction."

In a rainforest or on coral reef there are a wide variety of species of primary producers such as green plants and algae. Since they are competitors, relatively few individuals of the same species exist, subjecting them to a greater risk of extinction should external conditions change. This could result in a depletion of food sources for a species of herbivores that, in turn, affects a predator at the top of the food chain. Biologists call this transformation a cascading extinction.

The opposite would apply to an ecosystem whereby few species exist in large numbers and animal species are adaptable generalists.

The researchers create their model food webs following on from their experiences with real ecosystems; what eats what, the composition of the species' life cycles, and how they interact with others. In this study, external conditions are represented as an increasing and unpredictable variation.

"The model we worked with is quite typical. The next step is to introduce actual, detailed climatic data," informs Bo Ebenman, Professor of Theoretical Biology who supervised Linda Kaneryds thesis.


'/>"/>
Contact: Bo Ebenman
boebe@ifm.liu.se
46-730-242-901
Linkping University
Source:Eurekalert

Related biology news :

1. Vegetation hardly affected by extreme flood events
2. Extreme nature helps scientists design nano materials
3. Extreme weather postpones the flowering time of plants
4. Geoscientists discuss sea level rise, extreme storm events and more
5. Genome projects launched for three extreme-environment animals
6. Treatment for extreme nausea, vomiting during pregnancy
7. Scientists track chemical changes in cells as they endure extreme conditions
8. Extreme genes shed light on origins of photosynthesis
9. First metallic nanoparticles resistant to extreme heat
10. Extremes of sleep related to increased fat around organs
11. Road salt and cars produce extreme water contamination in Frenchmans Bay, UTSC research reveals
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/24/2016)... superior patient care by providing unparalleled technology to leaders of the medical imaging industry. ... recently added to the range of products distributed by Ampronix. Photo - ... ... ... ...
(Date:5/3/2016)... May 3, 2016  Neurotechnology, a provider of ... MegaMatcher Automated Biometric Identification System (ABIS) , a ... projects. MegaMatcher ABIS can process multiple complex biometric ... combination of fingerprint, face or iris biometrics. It ... and MegaMatcher Accelerator , which have ...
(Date:4/19/2016)... , UAE, April 20, 2016 ... be implemented as a compact web-based "all-in-one" system solution ... the biometric fingerprint reader or the door interface with ... of modern access control systems. The minimal dimensions of ... ID readers into the building installations offer considerable freedom ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016 ... Hematology Review, 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 ... , the peer-reviewed journal from touchONCOLOGY, Andrew ... escalating cost of cancer care is placing an ... result of expensive biologic therapies. With the patents ...
(Date:6/23/2016)... ... June 23, 2016 , ... Velocity ... intelligent tools designed, tuned and optimized exclusively for Okuma CNC machining centers at ... result of a collaboration among several companies with expertise in toolholding, cutting tools, ...
(Date:6/22/2016)... 22, 2016 Research and Markets has announced ... report to their offering. ... from $29.3 billion in 2013. The market is expected to grow ... 2015 to 2020, increasing from $50.6 billion in 2015 to $96.6 ... during the forecast period (2015 to 2020) are discussed. As well, ...
(Date:6/22/2016)... , June 22, 2016   ViaCyte, Inc. , ... stem cell-derived islet replacement therapy for the treatment of ... ISSCR 2016 Annual Meeting.  ISSCR 2016, the Global Stem ... at Moscone West in San Francisco.  ... presentations are as follows:Event: , Focus Session: Tools for ...
Breaking Biology Technology: