Abstract:
:Competition for space is a remarkable ecological force, comparable to predation, producing a strong selective pressure on benthic invertebrates. Some invertebrates, thus, possess antimicrobial compounds to reduce surface bacterial growth. Antimicrobial inhibition is the first step in avoiding being overgrown by other organisms, which may have a negative impact in feeding, respiration, reproduction … The in situ inhibition of bacterial biofilm was used here as an indicator of antifouling activity by testing hydrophilic extracts of twelve Antarctic invertebrates. Using two different approaches (genetics and confocal techniques) different levels of activity were found in the tested organisms. In fact, differences within body parts of the studied organisms were determined, in agreement with the Optimal Defense Theory. Eight out of 15 extracts tested had negative effects on fouling after 28 days submerged in Antarctic waters. Thus, although chemical defenses may be quite species-specific in their ecological roles, these results suggest that different chemical strategies exist to deal with space competition.
journal_name
Mar Environ Resjournal_title
Marine environmental researchauthors
Angulo-Preckler C,Cid C,Oliva F,Avila Cdoi
10.1016/j.marenvres.2015.02.001subject
Has Abstractpub_date
2015-04-01 00:00:00pages
30-8eissn
0141-1136issn
1879-0291pii
S0141-1136(15)00013-6journal_volume
105pub_type
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