Naslov
Pregled pridnenih zajednica u uvali Gaženica (trajektni terminal Zadar, srednji Jadran)
(Asurvey of benthic communities in Gaženica Bay (Zadar, middle Adriatic))

Autori
Nerlović, Vedrana ; Jaklin, Andrej

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceeding of the 9th Croatian biological congress / Besendorfer, Višnja ; Klobučar, Goran - Zagreb : Hrvatsko biološko društvo, 2006, 279-280

Skup
9th Croatian biological congress with International Participation

Mjesto i datum
Rovinj, Hrvatska, 23.09.2006. - 29.09.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Domaća recenzija

Ključne riječi
bentos ; fauna ; flora ; srednji Jadran
(benthos ; fauna ; flora ; middle Adriatic)

Sažetak
A biocenological estimation of benthic communities was carried out in Gaženica bay, Zadar area, during September 2003. Macrobenthos was observed in situ along three bottom transects using SCUBA divinig technique and by direct observation method. A total of 15 macroalgae species, one marine phanerogam and 69 animal species was recorded. Quite a small number of recorded species could be explained through the weak sea water dinamic and increased input of the finest sediment fraction. Despite the shallownes of the area investigated the largest part of the bottom consists of fine sediment resembling to terignos ooze. Sporadic enclaves of hard bottom along all the three transects (individual stones or bigger litter) are colonized by a small number of sciaphilic organisms, mainly of filtrator or suspension-feeding type. Their occurence in the shallow water is probably the result of a reduced light penetration and a permanent input of organic particles in suspension. The presence of the green alga Dasycladus vermicularis, an indicator of mud deposition, confirms the stronger sedimentation. Settlements of the mussel Mytilus galloprovincialis in the mediolittoral step are an evidence of fresh water inflow in the surface layer of the area investigated. Dense settlements of the brown anemone Anemonia sulcata in some places indicate a higher input of organic matter in the ecosystem. This statement is supported by the presence of the green nitrophilic alga Ulva lactuca, which is considered as an indicator of a higher dominance of nutrients in the zone. Reduced and isolated bottom surfaces occupied by the phanerogam Cymodocea nodosa, as well as the absence of characteristic biocoenosis elements, suggest a recent degradation of this community. This survey of benthic communities should be considered as a preliminary assessment of the present initial state since there are no biocenological data for the area investigated.

Izvorni jezik
Hrvatski, engleski

Znanstvena područja
Biologija

POVEZANOST RADA