Diversity and Distribution of the Bryozoa along Underwater Cliffs in the Adriatic Sea with Special Reference to Thermal Regime

Novosel, Maja; Požar‐Domac, Antonieta

doi:10.1111/j.1439-0485.2004.00022.x

Cited by 34 publications

(27 citation statements)

References 14 publications

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“…The episode was so pronounced that it checked seasonal warming and reduced diurnal temperature oscillations. The drop in temperature was caused by a strong upwelling along the southeastern Adriatic coast (as also pointed out by Novosel et al, 2004). This upwelling episode was captured by an SST satellite image taken on 9 August (Fig.…”

Section: Background Processesmentioning

confidence: 55%

“…At the same time weak fluctuations of temperature were recorded at 36 m, thus pointing to a rather stable water temperature at about 15.8 • C below the thermocline. At the end of August the thermocline began to sink into deeper layers and, consequently, temperatures at 22 and 36 m peaked in October (as also documented by the low-pass filtered series of Novosel et al, 2004). In mid-November a rapid cooling took place over the whole water column, marking the end of the stratification period.…”

Section: Background Processesmentioning

confidence: 68%

“…They provided a yearlong temperature series with 16-min resolution at the depths of 15, 22 and 36 m. Previous openAdriatic temperature measurements did not extend beyond a few weeks, due to heavy fishing activity in the area. The present experiment was designed to study the diversity and distribution of bryozoa along underwater cliffs in the Adriatic Sea (Novosel et al, 2004). Emphasis was placed on the thermal regime in the area of research.…”

Section: Sea Currents Recorded In Suruga Andmentioning

confidence: 99%

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Diurnal internal tides detected in the Adriatic

2006

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Abstract. Strong diurnal oscillations, documented by temperature data that were collected along a submarine cliff on the Lastovo Island (southern Adriatic), are studied and compared with sea level and wind measurements at Dubrovnik and Komiža (island of Vis). Three thermistors were deployed at the depths of 15, 22 and 36 m between March 2001 and March 2002. Pronounced diurnal temperature oscillations were detected at 15 and 22 m during the stratified season. The correlation between the sea surface and thermocline displacements was highest in June 2001, when diurnal wind changes were not significant, while diurnal sea level oscillations achieved annual maxima. Thermocline oscillations were in phase with sea level changes. The range of diurnal sea surface variability was close to 19 cm, while the range of corresponding thermocline variability was about 5.4 m. The findings summarize the outcome of the first dedicated study of internal tides in the Adriatic.

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Section: Background Processesmentioning

confidence: 55%

Section: Background Processesmentioning

confidence: 68%

Section: Sea Currents Recorded In Suruga Andmentioning

confidence: 99%

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Diurnal internal tides detected in the Adriatic

2006

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“…Similarly, mean zooid lengths of Pentapora fascialis showed a significant and negative correlation with mean annual temperature for colonies collected from 9 sites in the Mediterranean and the UK (Lombardi et al 2006). Conversely, Novosel et al (2004) found no systematic differences in zooid lengths between 2 sites in the North and South Adriatic that could be explained by temperature. Their study was highly inclusive, analysing 14 cheilostome species.…”

Section: Geographical Variation In the Present Daymentioning

confidence: 62%

Bryozoan growth and environmental reconstruction by zooid size variation

Okamura¹,

O’Dea²,

Knowles³

2011

Mar. Ecol. Prog. Ser.

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The modular growth of cheilostome bryozoans combined with temperature-induced variation in module (zooid) size has enabled the development of a unique proxy for deducing seasonal temperature regimes. The approach is based on measures of intracolonial variation in zooid size that can be used to infer the mean annual range of temperature (MART) experienced by a bryozoan colony as predicted by a model of this relationship that was developed primarily to infer palaeoseasonal regimes. Using the model predictions effectively requires a highly strategic approach to characterise the relative amount of within-colony zooid size variation (by adopting random or very systematic measurements of zooids that meet a stringent set of criteria) to gain insights on temperature variation. The method provides an indication of absolute temperature range but not the actual temperatures experienced. Here we review the development of, support for and applications of the zooid size MART approach. In particular, we consider the general issue of why body size may vary with temperature, studies that validate the zooid size-temperature relationship and insights that have been gained by application of the zooid size MART approach. We emphasise the potential limitations of the approach, including the influence of confounding factors, and highlight its advantages relative to other proxies for palaeotemperature inferences. Of prime importance is that it is relatively inexpensive and quick and allows a direct estimate of temperature variation experienced by an individual colony. Our review demonstrates a strong and growing body of evidence that the application of the zooid size MART approach enables robust interpretations for palaeoclimates and merits broad recognition by environmental and evolutionary biologists and climate modellers.

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“…5, logger 1) are due to a phenomenon that was first recorded in the southern Adriatic. Novosel et al (2004) found that marine life within the thermocline layer is exposed to large high-frequency oscillations connected partly to an internal diurnal tide. Similar oscillations could be noticed inside the cave at loggers 2, 4 and 5 (depths 2.9 m, 5.1 m and 3.9 m respectively) but not at loggers 3 (depth 0.7 m) and 6 (depth 8.5 m).…”

Section: Discussionmentioning

confidence: 99%

Biological response to geochemical and hydrological processes in a shallow submarine cave

Radolović

Bakran‐Petricioli

Petricioli³

et al. 2015

Medit. Mar. Sci.

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The Croatian coastal karst abounds in submerged caves that host a variety of environmental conditions depending on the geomorphology, depth and submarine groundwater discharge. One example is the Y-Cave, a shallow, mostly submerged, horizontal cave on Dugi Otok Island, on the eastern Adriatic coast. This study was aimed at examining the temporal and spatial variability of the marine cave environment, including temperature, salinity, light intensity, cave morphology and hydrodynamism, along with the dissolutional effect caused by the mixing of sea and freshwater. The general distribution of organisms in the Y-Cave was positively correlated to the light gradient and reduced water circulation, thus the highest species diversity and abundance were recorded in the front part of the cave. The phylum Porifera was the most dominant group, and the poriferan species diversity in the cave ranks among the ten highest in the Mediterranean. The middle part of the cave, although completely dark, hosts an abundant population of the gastropod Homalopoma sanguineum and clusters of the gregarious brachiopod Novocrania anomala, whose presence could be connected to tidal hydrodynamics. The absence/scarcity of sessile marine organisms and pronounced corrosion marks at shallow depths inside the cave suggest a freshwater impact in the upper layers of the water column. A year long experiment with carbonate tablets revealed three different, independent ongoing processes affected by the position in the cave: bioaccumulation, dissolution and mechanical erosion. The results of long-term temperature readings also revealed water column stratification within the cave, which was not disturbed by either tidal or wave action. The shallow, partly submerged and relatively small Y-Cave is characterised by a suite of complex environmental conditions, which, together with the resulting distribution of organisms, are unique to this cave.

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Diversity and Distribution of the Bryozoa along Underwater Cliffs in the Adriatic Sea with Special Reference to Thermal Regime

Cited by 34 publications

References 14 publications

Diurnal internal tides detected in the Adriatic

Diurnal internal tides detected in the Adriatic

Bryozoan growth and environmental reconstruction by zooid size variation

Biological response to geochemical and hydrological processes in a shallow submarine cave

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