Great Barrier Reef membangun karang di bawah ancaman dari rumput laut beracun-
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berita artikel terkait tentang karang,gugusan karang,great barrier reef,
australia,rumput laut
Great Barrier Reef membangun karang di bawah ancaman dari rumput laut beracun
Tanggal:
3 Februari 2017
Sumber:
Griffith University
Ringkasan:
Penelitian dunia pertama di Great Barrier Reef telah menunjukkan bagaimana
ganggang 'seperti-gulma' akan membunuh karang penting karena peningkatan
konsentrasi karbon dioksida di atmosfer.
................................
Penelitian Griffith University, dilakukan bekerja sama dengan para ahli nasional
dan internasional karang dan ekologi kimia, menunjukkan bahwa jika dunia
terus dengan 'bisnis seperti biasa' emisi CO2 penting untuk bangunan
terumbu karang akan menderita secara signifikan pada tahun 2050
dan mati pada tahun 2100.
Associate Professor Guillermo Diaz-Pulido, dari sekolah lingkungan Griffith ,
mengatakan bahwa karena ganggang akan bersaing untuk ruang dengan karang
di gugus karang, seperti rumput liar, dan akhirnya mengambil alih.
Peneliti tahu meningkat nya CO2 memiliki efek pada perilaku rumput laut tetapi
sekarang telah mampu menunjukkan betapa hal ini terjadi.
Mereka menemukan hal ini disebabkan peningkatan potensi senyawa kimia
yang beracun untuk karang.
................................
label
Great Barrier Reef building coral under threat from
poisonous seaweed,Great Barrier
Reef di bangun dari karang di bawah ancaman dari rumput laut
beracun,Great Barrier Reef,CO2 ,starfish
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Great Barrier Reef building coral under threat from
poisonous seaweed
Date:
February
3, 2017
Source:
Griffith
University
Summary:
World-first research on the Great Barrier Reef has shown how
'weed-like' algae will kill vital coral because of increased carbon dioxide
concentrations in the atmosphere.
................................
The Griffith University study, conducted in collaboration with national and
international experts in reef and chemical ecology, showed that if the world
continues with 'business as usual' CO2emissions important reef building corals
will suffer significantly by 2050 and die off by 2100.
Associate Professor Guillermo Diaz-Pulido, of Griffith's School of
Environment, says that is because algae will compete for space with corals in
the reef, much like a weed, and eventually take over.
Researchers knew increased CO2 had an effect on seaweed behaviour
but have now been able to demonstrate just how this happens. They discovered
this is due to an increase in the potency of chemical compounds that poison
corals.
"This is a major step forward in understanding how seaweeds can harm
corals and has important implications for comprehending the consequences of
increased carbon dioxide emissions on the health of the Great Barrier
Reef," says Associate Professor Diaz-Pulido.
"For the algae to grow they need light and CO2, just like any other
plant, and because algae in the future would be exposed to much more CO2 in seawater we
wanted to know to what extent the CO2 would affect some of the things
algae do, the physiology and the interaction with animals."
Professor Mark Hay, from the Georgia Institute of Technology and co-author
of the study, adds: "What we've discovered is that some algae produce more
potent chemicals that suppress or kill corals more rapidly. This can occur
rapidly, in a matter of only weeks.
"If the algae overtake the coral we have a problem which contributes
to reef degradation, on top of what we already know with coral bleaching, crown
of thorn starfish outbreaks, cyclones or any other disturbance."
The research was undertaken at Heron Island, a coral cay on the southern
end of the reef using underwater reef experiments and outdoor lab studies.
Associate Professor Diaz-Pulido says the study has global impacts because
one of the seaweeds studied that causes the most damage is a common brown alga
species found in reefs worldwide.
"That's a problem because if these algae take advantage of elevated CO2 in seawater
that's even more a matter of concern," he says.
"The scale of the problem is so big removing a bunch of seaweed from
the reef isn't going to do much because it just regrows and regenerates, so I
think the way to address this really is to reduce the levels of CO2 in the
atmosphere."
Story Source:
Journal Reference:
1.
Carlos Del Monaco, Mark E. Hay, Patrick Gartrell, Peter J. Mumby, Guillermo
Diaz-Pulido. Effects of ocean acidification on the potency of
macroalgal allelopathy to a common coral. Scientific Reports,
2017; 7: 41053 DOI:10.1038/srep41053
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