From seasonal to decadal inter-annual variability of mesozooplankton biomass in the Northern Adriatic Sea (Gulf of Trieste)

Kamburska, Lyudmila; Fonda-Umani, S.

doi:10.1016/j.jmarsys.2008.12.007

Cited by 39 publications

(32 citation statements)

References 58 publications

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“…The same trend has been observed in the northern Adriatic (Kamburska and Fonda-Umani 2009). Abundances of diatoms and dinoflagellates have been significantly correlated with SST (Table 3).…”

Section: Discussionsupporting

confidence: 79%

“…The winter NAO index showed a statistically significant positive correlation with air temperature and a negative correlation with precipitation along the eastern Adriatic coast (Grbec et al 2009). The observed negative correlation between April phytoplankton biomass and the February NAO index could be explained through an increase of nutrients due to high precipitation as well as by the possible influence of low winter temperatures on the development of the zooplankton population (Kamburska and Fonda-Umani 2009). A positive correlation between chl a and precipitation in the Mediterranean has already been reported (Katara et al 2008).…”

Section: Discussionmentioning

confidence: 83%

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Inter-decadal Variability in Phytoplankton Community in the Middle Adriatic (Kaštela Bay) in Relation to the North Atlantic Oscillation

Gladan

Marasović

Grbec

et al. 2009

Estuaries and Coasts

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Evaluation of a 45-year data set of primary production (PP), a 30-year data set of phytoplankton biomass, and a 51-year data set of species composition shows an increase of phytoplankton biomass and abundance in the period from the mid-1980s to the mid-1990s. Phytoplankton biomass showed bimodal seasonal cycles, with winter and spring maxima, which did not change over the past 30 years. Diatoms were the most abundant functional group and they prevailed during the colder part of the year while the dinoflagellate contribution to the phytoplankton community increased in the warmer period from May to August. Diatoms showed a significant negative correlation with sea surface temperature (SST), while dinoflagellates were positively correlated with SST. An increase of phytoplankton abundance, particularly dinoflagellate, in the period from the mid-1980s to the mid-1990s coincided with years characterized by a high North Atlantic Oscillation (NAO) index. Primary production and chlorophyll a concentration in the spring period were negatively correlated with the NAO winter (DJFM) index, probably caused by increased precipitation associated with a low or negative NAO index. PP in winter during the mixing period was positively related to the NAO winter index associated with higher temperatures and dry conditions which brought more clear days and increased input of solar radiation.

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Section: Discussionsupporting

confidence: 79%

Section: Discussionmentioning

confidence: 83%

Inter-decadal Variability in Phytoplankton Community in the Middle Adriatic (Kaštela Bay) in Relation to the North Atlantic Oscillation

Gladan

Marasović

Grbec

et al. 2009

Estuaries and Coasts

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“…The southern penetration of Atlantic waters mainly occurs through the channel between Eivissa and Mallorca all year, but this water mass remains in the eastern sector of the region (Monserrat et al, 2008). In years with mild winters, the flow of Atlantic waters through the Eivissa Channel is more intense especially in late spring and Kamburska & Fonda-Umani (2009) summer. These circulation patterns make intrusion of Atlantic waters into the Catalan Sea from the northeast with surface waters more probable than flow through the eastern Balearic Islands and the Gulf of Lyon.…”

Section: Discussionmentioning

confidence: 99%

Blooms of the invasive ctenophore, Mnemiopsis leidyi, span the Mediterranean Sea in 2009

et al. 2010

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Blooms of the invasive ctenophore, Mnemiopsis leidyi, occurred in 2009 along the Mediterranean Sea coasts of Spain and Israel. This voracious zooplanktivore spread throughout the Black Sea basin after its introduction in the early 1980s, throughout northern European coastal waters, and now occurs throughout the Mediterranean Sea. M. leidyi occurred throughout the summer along the entire Catalan Spanish and Israeli coasts in 2009. Those locations had high temperatures (18-26°C) and salinities (37-38) during the blooms. The patterns of abundance of large jellyfish along the Catalan coast were unusual in 2009, with low numbers during July, August, and September when ctenophores were abundant. Small populations of those potential predators and food competitors of M. leidyi could have contributed to the ctenophore bloom. The identity of the ctenophores from Spain and Israel was confirmed as M. leidyi by molecular analysis based on DNA sequencing of the nuclear internal transcribed spacer (ITS) regions. This is the first molecular confirmation of M. leidyi in the Mediterranean Sea. Most ctenophores had an ITS genotype previously found in M. leidyi from other invaded regions (the Black, Azov, and Mediterranean seas), as well as native regions in the United States, suggesting common ancestry. Based on the circulation patterns of Mediterranean surface waters and shipping activities, we conclude that the spread of M. leidyi in the Mediterranean probably resulted from re-introductions by ballast water transport and subsequent distribution by currents. We also conclude that the near-simultaneous blooms in opposite ends of both the Mediterranean basins indicate that M. leidyi is resident around the Mediterranean. We discuss environmental conditions, food, and predators of M. leidyi in both regions that would influence the future effects of this voracious consumer on the pelagic food web of the Mediterranean Sea.

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“…During the period 1961-2005, in several areas of the eastern Adriatic, changes in phyto-and zooplankton abundance and community structure (Batistić et al, 2007;Conversi et al, 2009;Degobbis et al, 1995;Kamburska and FondaUmani, 2009;Kršinić and Grbec, 2006;Ninčević Gladan et al, 2010), as well as in the quantitative and qualitative composition of the Adriatic ichthyofauna (Dulčić and Grbec, 2000;Lipej and Dulčić, 2004), have been documented and ascribed to natural and man-induced processes. Variations have been observed in biomass (Mozetić et al, 2010;Kamburska and Fonda Umani, 2009), in primary production (Grbec et al, 2009), in taxonomic composition (Ninčević Gladan et al, 2010;Conversi et al, 2009), in life cycles (Kamburska and Fonda Umani, 2009) and in ecosystem functioning (Śolić et al, 2009). The numbers of thermophilic species have increased; several species, previously scarce or rare, have become more abundant, while others have been reported for the first time.…”

Section: Possible Impact Of the Bios Mechanism On The Adriatic Biodivmentioning

confidence: 99%

On the impact of the Bimodal Oscillating System (BiOS) on the biogeochemistry and biology of the Adriatic and Ionian Seas (Eastern Mediterranean)

et al. 2010

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Abstract. Analysis of 20-year time-series of the vertically averaged salinity and nutrient data in the Southern Adriatic shows that the two parameters are subject to strong decadal variability. In addition, it is documented that nutrient and salinity variations are out of phase. Nutrients in the Ionian and in the Adriatic vary in parallel except that generally the nutrient content in the Adriatic is lower than in the Ionian, a fact that has been attributed to primary producer consumption following the winter convective mixing. As shown earlier, North Ionian Gyre (NIG) changes its circulation sense on a decadal scale due to the Bimodal Oscillating System, i.e. the feedback mechanism between the Adriatic and Ionian. Cyclonic circulation causes a downwelling of the nitracline along the borders of the NIG and a decrease in the nutrient content of the water flowing into the Adriatic across the Otranto Strait, and vice versa. In addition, the highly oligotrophic central area of the Ionian shows annual blooms only during cyclonic NIG circulation. Inversion of the sense of the NIG results in the advection of Modified Atlantic Water or of the Levantine/Eastern Mediterranean waters in the Adriatic. Here, we show that the presence of allochtonous organisms from Atlantic/Western Mediterranean and Eastern Mediterranean/temperate zone in the Adriatic are concurrent with the anticyclonic and cyclonic circulations of the NIG, respectively. On the basis of the results presented, a revision of the theory of Adriatic ingressions formulated in the early 1950s is proposed.

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From seasonal to decadal inter-annual variability of mesozooplankton biomass in the Northern Adriatic Sea (Gulf of Trieste)

Cited by 39 publications

References 58 publications

Inter-decadal Variability in Phytoplankton Community in the Middle Adriatic (Kaštela Bay) in Relation to the North Atlantic Oscillation

Inter-decadal Variability in Phytoplankton Community in the Middle Adriatic (Kaštela Bay) in Relation to the North Atlantic Oscillation

Blooms of the invasive ctenophore, Mnemiopsis leidyi, span the Mediterranean Sea in 2009

On the impact of the Bimodal Oscillating System (BiOS) on the biogeochemistry and biology of the Adriatic and Ionian Seas (Eastern Mediterranean)

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