Navigation Links
How algae 'enslavement' threatens freshwater bodies described by Hebrew University researcher
Date:8/12/2010

Jerusalem, August 12, 2010 How toxic, blue-green algae out-compete other organisms through a form of selfish "enslavement" -- and by so doing proliferate dangerously in freshwater bodies -- has been described by a researcher at the Hebrew University of Jerusalem.

In general, the increasing occurrence of toxic cyanobacterial (blue-green algae) blooms in freshwater bodies is a matter of growing international concern due to their detrimental impact on drinking water quality and, in extreme cases, causing death to humans, livestock and wild animals. Thus, the new Hebrew University research can be of value to water authorities seeking ways to control this algae infiltration.

A toxic blue-green alga known as Aphanizomenon ovalisporum was first detected in Lake Kinneret (Sea of Galilee) in 1994, and its presence has been noted each summer thereafter. The conditions promoting these toxic blooms and other toxin formations in freshwater bodies were not known.

However, now in a paper to be published online on Aug. 12 in Current Biology, Yehonatan Bar-Yosef, a Ph.D. student in Prof. Aaron Kaplan's group at the Alexander Silberman Institute of Life Sciences at the Hebrew University of Jerusalem, has suggested a novel mechanism to explain the ability of Aphanizomenon to form massive toxic blooms by overcoming competition from other microorganisms in the water. (Kaplan is the Bernice and Aaron Beare Family Professor of Environmental Plant Physiology.)

Aphanizomenon is known to produce the toxin cylindrospermopsin (CYN). Secretion of the CYN, Bar-Yosef found, induces phosphate-limitation responses in other microorganisms in the ecosystem, even in the presence of ample phosphate in the water. The phosphate mineral is an essential nutrient for growth in many organisms.

The result is that Aphanizomenon is able to attain a relative advantage in phosphate-absorption capability, thus gaining dominance in the competition for nutrients.

The investigators have used the term "enslavement" to describe this novel interspecies interaction, mediated by CYN. This research provides an explanation for the significant rise in massive cyanobacterial bloom events worldwide during the last decade despite attempts of water management authorities to reduce the inflow of nutrients, especially phosphate, entering from watersheds.

The research on the Kinneret water was carried out close cooperation with Dr. Assaf Sukenik and Dr. Ora Hadas from the Kinneret laboratory of the Israel Institute of Limnology and Oceanography.


'/>"/>

Contact: Jerry Barach
jerryb@savion.huji.ac.il
972-258-82904
The Hebrew University of Jerusalem
Source:Eurekalert

Related biology news :

1. Montana State researchers receive grant to study algae as a source of biofuel
2. Engineering algae to make fuel instead of sugar
3. Success for first outdoor, large-scale algae-to-biofuel research project in Nevada
4. Study links seabird deaths to soap-like foam produced by red-tide algae
5. Dust deposited in oceans may carry elements toxic to marine algae
6. Mighty diatoms: Global climate feedback from microscopic algae
7. Nanofarming technology harvest biofuel oils without harming algae
8. ISU researcher identifies protein that concentrates carbon dioxide in algae
9. Genes from tiny algae shed light on big role managing carbon in worlds oceans
10. Genes from tiny marine algae suggest unsuspected avenues for new research
11. Coralline algae in the Mediterranean lost their tropical element between 5 and 7 million years ago
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/20/2017)... ALLENTOWN, Pa. , March 20, 2017 ... PD 2.0 personal spirometer and Wellness Management System (WMS), ... Founded in 2010, PMD Healthcare is a ... Company with a mission dedicated to creating innovative solutions ... of life. With that intent focus, PMD developed the ...
(Date:3/7/2017)... Brandwatch , the leading social intelligence company, today announces that it ... insights to support its reporting, help direct future campaigns, and share ... charity will be using Brandwatch Analytics social listening and analytics technology ... the topics and issues that are a priority for its supporters. ... "Until recently we,ve ...
(Date:3/2/2017)... LONDON , March 2, 2017 Who ... infringement lawsuits? Download the full report: https://www.reportbuyer.com/product/4313699/ ... ON THE FINGERPRINT SENSOR FIELD? Fingerprint sensors using ... smartphones. The fingerprint sensor vendor Idex forecasts an increase ... in mobile devices and of the fingerprint sensor market ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... Md. , March 23, 2017  Northwest ... developing DCVax® personalized immune therapies for solid tumor ... the $7.5 million financing it announced last Friday, ... sold to several institutional investors securities totaling 28,843,692 ... per share, and 10,000,000 shares of Class C ...
(Date:3/23/2017)... CT (PRWEB) , ... March 23, 2017 , ... ... LLC, was recently selected by the Connecticut Technology Council (CTC) as a 2017 ... at CTC’s thirteenth annual Women of Innovation Awards Dinner. , The dinner recognizes ...
(Date:3/23/2017)... , March 23, 2017  Agriculture technology company ... A financing and note conversion to commercialize its Cool ... is focused on developing products that are simultaneously profitable ... million in the last 18 months. This latest round ... Bridge Venture Partners. The company,s primary ...
(Date:3/22/2017)... Worcester, Mass. (PRWEB) , ... March 22, 2017 ... ... to scale up human tissue regeneration from small lab samples to full-size tissues, ... injuries: how to establish a vascular system that delivers blood deep into the ...
Breaking Biology Technology: