Bakterium setzt sich in „Todeszone“ durch
Warnemünder Mikrobiologen vom Leibniz-Institut für Ostseeforschung untersuchten erfolgreich ein Bakterium, welches trotz Sauerstoffmangel in der „Todeszone“ überleben kann.
Die Ostsee im Winter. Quelle: Wikipedia
(ROSTOCK) Mikrobiologen vom Leibniz-Institut für Ostseeforschung in Warnemünde (IOW) beschreiben erstmals umfassend ein Bakterium, das an den Grenzen so genannter „Todeszonen“ in Ostsee und Schwarzem Meer die Ausbreitung giftigen Schwefelwasserstoffes verhindert.
Sauerstoff ist auch unter Wasser ein lebenswichtiges Element. Zu den prominentesten Vertretern dieses Phänomens gehören die so genannten „Todeszonen“ in der Ostsee und dem Schwarzem Meer. Hier herrscht am Boden regelmäßig, bzw. im Falle des Schwarzen Meeres sogar permanent, Sauerstoffmangel, begleitet vom Auftreten toxischen Schwefelwasserstoffs (Sulfid).
Wegen der hohen ökonomischen Schäden und der postulierten und in Ansätzen bereits beobachteten Zunahme dieser Phänomene arbeiten weltweit Biogeochemiker und Mikrobiologen zusammen mit physikalischen Ozeanographen an der Erforschung der Mechanismen. Dass die Ausbreitung der Sulfide durch Bakterien verhindert werden kann, weiß man bereits seit einiger Zeit. Unklar war jedoch, wie dieser Prozess genau funktioniert, da die beteiligten Organismen kaum bekannt waren.
Den Mikrobiologen des IOW gelang es nun erstmals, einen Hauptakteur bei der Sulfid-Entgiftung in Sauerstoffminimumzonen zu isolieren, zu kultivieren und hinsichtlich seiner Physiologie zu untersuchen. Zusammen mit Kollegen des Max-Planck-Instituts für marine Mikrobiologie in Bremen konnte außerdem seine genetische Ausstattung umfassend beschrieben werden.
„Sulfurimonas gotlandica“ ist die vorläufige Bezeichnung dieses Vertreters der so genannten Epsilonproteobakterien, den die Warnemünder in der Grenzschicht zwischen Sauerstoff-haltigem (oxischem) und Sauerstoff-freiem (anoxischem) Wasser im Gotlandbecken in der zentralen Ostsee in großer Häufigkeit fanden. Seine Eigenschaften sind erstaunlich: bei der Wahl seiner Energiequellen beschränkt sich dieses Bakterium nicht auf Sulfid, sondern ist äußerst flexibel und kann deshalb sowohl im oxischen als auch im anoxischen Wasser leben. Die genetische Analyse zeigt, dass es mit einer Umweltsensorik und einer hohen Beweglichkeit ausgestattet ist, die es ihm ermöglichen, die energetisch günstigsten Umgebungen aktiv aufzusuchen. Zu der ökologisch so bedeutenden Fähigkeit der Sulfidentgiftung gesellen sich weitere wichtige Eigenschaften: Die Zellen sind in der Lage, Nitrat zu elementarem Stickstoff zu reduzieren (die so genannte Denitrifizierung, die überdüngten Gewässern hilft, einen Teil des Nährstoffs Stickstoff los zu werden), und können die Energie dazu benutzen, im Dunkeln CO2 zu fixieren, um so Biomasse aufzubauen.
Mit „S. gotlandica“ haben die Warnemünder Mikrobiologen nun der Wissenschaft einen Modellorganismus zur Verfügung gestellt, der einerseits repräsentativ für eine ganze Gruppe von relativ ungewöhnlichen Bakterien ist, an dem andererseits so wichtige Prozesse wie die Sulfidentgiftung modellhaft im Labor studiert werden können. Dies wird es der wissenschaftlichen Gemeinschaft insgesamt erleichtern, marine „Todeszonen“ zu verstehen und eventuell sogar aktiv beeinflussen zu können.
Das IOW ist Mitglied der Leibniz-Gemeinschaft, zu der zurzeit 87 Forschungsinstitute und wissenschaftliche Infrastruktureinrichtungen für die Forschung gehören.
Quelle: IOW, bearbeitet von Tanja Sophie Gesk
I just want to tell you that I’m newbie to blogging and site-building and absolutely liked your web-site. Likely I’m want to bookmark your blog . You certainly come with really good stories. Bless you for sharing with us your website page.
so much great details on here, : D.
I am glad to be one of the visitors on this great website (:, appreciate it for posting .
Superb blog appropriate here! Also your site a whole lot up really quickly! What internet host are you the use of? Can I am obtaining your associate link to your host? I want my site loaded up as rapidly as yours lol
This web site is really a walk-by means of for all the information you wished about this and didn’t know who to ask. Glimpse here, and also you’ll undoubtedly discover it.
Just wanna tell that this is extremely helpful, Thanks for taking your time to write this.
I just added this feed to my bookmarks. I have to say, I really enjoy reading your blogs. Thanks!
Great post. I just stumbled upon your blog and wanted to say that I have really enjoyed browsing your blog posts. In any case I’ll be subscribing to your feed and I hope you write again soon!
I really appreciate this post. I have been looking everywhere for this! Thank goodness I found it on Bing. You’ve made my day! Thx again!
Your house is valueble for me. Thanks!…
Billiard is a game which is mostly played by the high class people
I enjoy you because of every one of your hard work on this web page. My mother delights in working on investigations and it’s really easy to understand why. Many of us notice all about the powerful tactic you produce functional things via your website and attract contribution from website visitors on this issue and our simple princess is undoubtedly starting to learn a great deal. Have fun with the rest of the year. You have been doing a splendid job.
Just desire to say your article is as surprising. The clarity in your post is simply spectacular and i can assume you are an expert on this subject. Well with your permission let me to grab your feed to keep updated with forthcoming post. Thanks a million and please continue the enjoyable work.
Woah! I’m really digging the template/theme of this blog. It’s simple, yet effective. A lot of times it’s difficult to get that “perfect balance” between superb usability and visual appeal. I must say that you’ve done a very good job with this. Additionally, the blog loads extremely fast for me on Opera. Excellent Blog!
Forgive my stupidity, but I can’t for the life of me find your sites rss feeds. Can you tell me where it is? Thanks.
very nice put up, i definitely love this web site, carry on it
Its like you read my mind! You appear to know a lot about this, like you wrote the book in it or something. I think that you could do with a few pics to drive the message home a bit, but instead of that, this is fantastic blog. An excellent read. I’ll certainly be back.
Thank you for the blog post. Manley and I are saving for our new e book on this theme and your short article has made us all to save all of our money. Your notions really clarified all our issues. In fact, in excess of what we had recognized prior to when we discovered your excellent blog. My spouse and i no longer nurture doubts along with a troubled mind because you have clearly attended to the needs in this post. Thanks
Thank you for your site post. Jones and I have been saving to get a new e-book on this topic and your short article has made all of us to save all of our money. Your thoughts really solved all our problems. In fact, greater than what we had acknowledged in advance of the time we stumbled on your amazing blog. My partner and i no longer nurture doubts along with a troubled mind because you have attended to all of our needs here. Thanks
I really appreciate this post. I have been looking all over for this! Thank goodness I found it on Bing. You have made my day! Thanks again!
I’m impressed, I need to say. Genuinely rarely do I encounter a blog that’s both educative and entertaining, and let me let you know, you might have hit the nail on the head. Your thought is outstanding; the issue is something that not enough people are speaking intelligently about. I’m quite happy that I stumbled across this in my search for something relating to this.
As soon as I detected this internet web site I went on reddit to share some of the really like with them.
Write more, thats all I have to say. Literally, it seems as though you relied on the video to make your point. You clearly know what youre talking about, why throw away your intelligence on just posting videos to your weblog when you could be giving us something enlightening to read?
You actually make it seem so easy together with your presentation however I find this topic to be actually something which I think I would by no means understand. It seems too complex and very vast for me. I am taking a look ahead in your subsequent put up, I’ll attempt to get the cling of it!
Flowers live in memory of victims one’s tourist boat “Bulgaria”, which sank in Volga river, at the principal harbour of Kazan July eleven, 2011.
MOSCOW – A standard of 122 bodies folks victims killed in Volga ship tragedy have been located, local regional emergencies side branch told Itar-Tass on Later.
“As of also, the death of 122 people is something that is officially registered, ” a spokesman simply department was quoted as saying.
The 65-year-old Getaway cruise boat carrying 201 a person who sank in Volga patterns are released July 10. Only 79 of the company’s passengers were rescued. [url=http://www.nflbeats.com/]Beats Solo[/url]
I was looking through some of your content on this site and I think this web site is real instructive! Keep posting.
We wish to thank you once again for the gorgeous ideas you offered Jeremy when preparing a post-graduate research in addition to, most importantly, with regard to providing many of the ideas in one blog post. If we had been aware of your blog a year ago, i’d have been rescued from the pointless measures we were choosing. Thank you very much.
Valuable information. Lucky me I discovered your website unintentionally, and I am stunned why this coincidence didn’t happened in advance! I bookmarked it.
I loved as much as you will receive carried out right here. The sketch is tasteful, your authored subject matter stylish. nonetheless, you command get bought an nervousness more than that you wish be delivering the following. unwell unquestionably come much more formerly again since exactly the very same nearly extremely often inside case you shield this hike.
I want to express my appreciation to you just for bailing me out of such a challenge. As a result of browsing through the internet and meeting basics which were not productive, I assumed my life was done. Being alive minus the approaches to the problems you have resolved through your entire site is a critical case, as well as the ones which could have in a negative way affected my entire career if I had not encountered your web site. Your good capability and kindness in playing with a lot of stuff was vital. I am not sure what I would’ve done if I hadn’t come across such a solution like this. I can also now look forward to my future. Thank you so much for your impressive and result oriented guide. I will not be reluctant to propose the website to any individual who would like guidelines on this problem.
penis enlargment, viagra, porn…
I was suggested this web-site by my cousin. I’m not sure whether or not this post is written by him as no a single else know such detailed about my problem. You happen to be incredible! Thanks!
you might have got an incredible blog right here! would you prefer to make some invite posts on my weblog?
aggressive as men when they’re driving. They are considerably less likely to be the instigator in a road rage incident, for example. It actually is also
Flowers reside in memory of victims one’s tourist boat “Bulgaria”, which sank in Volga river, with the primary harbour of Kazan July 11, 2011.
MOSCOW – A standard of 122 bodies folks victims killed in Volga ship tragedy have been located, local regional emergencies side branch told Itar-Tass on Later.
“As of also, the death of 122 people is something that is officially registered, ” a spokesman simply department was quoted as saying.
The 65-year-old Getaway cruise boat carrying 201 a person who sank in Volga patterns are released July 10. Only 79 of the company’s passengers were rescued. [url=http://www.nflbeats.com/]Beats Solo[/url]
Hi, Neat post. There’s a problem together with your web-site in internet explorer, could test this… IE nonetheless is the market leader and a excellent portion of folks will omit your excellent writing due to this problem.
Great website! I am loving it!! Will come back again. I am bookmarking your feeds also.
Thanks,it’s good for me!
Some genuinely fantastic posts on this net site, appreciate it for contribution. “A religious awakening which does not awaken the sleeper to love has roused him in vain.” by Jessamyn West.
I’d been honored to get a call from a friend immediately he identified the important points shared on the site. Reading through your blog posting is a real fantastic experience. Many thanks for thinking about readers like me, and I want for you the best of success as a professional in this field.
I am only writing to let you know of the wonderful experience our princess gained reading through yuor web blog. She realized a lot of things, not to mention what it’s like to have a wonderful helping style to get the rest effortlessly know certain grueling topics. You really exceeded our own expected results. Thank you for offering those warm and friendly, safe, edifying and even cool guidance on the topic to Mary.
Hey There. I found your blog using msn. This is a very well written article. I will make sure to bookmark it and come back to read more of your useful info. Thanks for the post. I’ll definitely comeback.
My plate is real full and your tryna give me a lot more food, boy what the fuck is wrong wit’ you?!|guruisthebomb|
Great luck getting people behind this a single. Though you make some Extremely fascinating points, youre going to have to do more than bring up a few issues that may be diverse than what weve already heard. What are trying to say right here? What do you want us to think? It seems like you cant actually get behind a unique thought. Anyway, thats just my opinion.
Hello, i believe that i noticed you visited my site so i came to “return the desire”.I am attempting to in finding things to enhance my site!I guess its ok to make use of some of your ideas!!
Look there for more:…
[...]The total glance of your site is great, let smartly as the content![...]…
It is perfect time to make some plans for the long run and it’s time to be happy. I’ve learn this submit and if I may I desire to suggest you some interesting issues or advice. Perhaps you can write next articles referring to this article. I wish to learn even more things about it!