Estudi de les comunitats d'heterobranquis a dos hàbitats
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Heterobranchs are a taxonomy subclass with scientific interest for its adaptations, its feeding
and for metabolic compounds that synthesize or can storage. Useful compounds for cancer
studies have been discovered. Habitat plays an important role in the ecology of heterobranch,
but little is known in the Mediterranean. In this study, evaluation two different habitats where
heterobranch inhabitat, seagrass meadows of Posidonia oceanica and rocky littoral, will be
evaluated. Will also be studied the effect of depth factor on population abundance and species
richness of heterobranch in posidonia seagrass meadows. Heterobranch distribution is linked
with its feeding and consequently with its habitat. Posidonia seagrass meadows are recognized
in several scientific studies because they can offer habitat to many benthic and nektonic fauna
and flora. Posidonia meadows are included in the Habitats Directive as a habitat of interest and
they are protected. Rocky littoral is a habitat with high availability of nutrients and light that is
idoneal for sponge colonies, cnidaria colonies, algae and tunicate. In my study I found that
despite light intensity in marine ecology is linked with depth, this factor is not linked to
heterobranch abundance and richness in posidonia seagrass meadows. Habitat factor is
significative: higher abundance and richness have been found on rocky littoral than posidonia
meadows. Identification of heterobranch species is difficult due to its size, therefore
photographic support can be helpful. My study shows a photography of all species inventory to
facilitate its identification, as well as its habitat and the feeding of heterobranch in order to
create a technical sheet that facilitate its location in future studies. The methodology used in
this study for heterobranch inventory is innovative and can be useful for further studies in the
future
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