Naslov
Increases in seagrass cover are paralleled by decreases in benthic slope along DGPS-and depth tracked video monitoring transacts in the a Central Adriatic embayment

Autori
Mokos, Melita ; Kruschel, Claudia ; Schultz, Stewart Tyre

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

Izvornik
Proceedings of the Mediterranean Seagrass Workshop 2009 / Di Carlo, G. ; Calladine, A. ; Žuljević, A. - Hvar : Seagrass 2000 - Mediterranean Seagrass Association, 2009, 39-40

Skup
Mediterranean Seagrass Workshop 2009

Mjesto i datum
Hvar, Hrvatska, 06.09.2009. - 10.09.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
seagrass; Zostera; Cymodocea; Novigrad Sea; monitoring; sedimentation

Sažetak
Within the scope of a seagrass monitoring program in the Novigrad Sea, Central Croatian Adriatic, we predicted that the annual variability in coverage of seagrasses (Zostera marina, Zostera noltii, and Cymodocea nodosa) can be partially explained by the annual variability in sediment translocation. From 23 fixed DGPS-referenced monitoring video transects followed over three years (June 2007–2009), we calculated annual (i) changes in interior bed seagrass coverage, (ii) gain in seagrass at the lower edge of the bed and seagrass bed expansion, and (iii) accumulation of sediment, its depth dependence, and the associated changes in transect slope. We found that in 2007 to 2008, the year with net sediment accumulation, seagrass coverage increased and the bed expanded. In both years seagrass cover within the seagrass bed increased with increasing sediment accumulation, while seagrass bed expansion was highest under inter- mediate sedimentation rates. Boat-based videographic monitoring can document both natural sediment movement along the depth gradient, and species-specific responses necessary for informed management of submerged aquatic vegetation in the Adriatic Sea.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

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