Resting stage in the biogenic fraction of surface sediments from the deep Mediterranean Sea

Tommasa, Luigi Della; Danovaro, Roberto; Belmonte, Genuario; Boero, Ferdinando

doi:10.3989/scimar.2004.68s1103

Cited by 9 publications

(4 citation statements)

References 58 publications

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“…42 dinoflagellate cyst morphotypes were identified and cyst concentration ranged between 384 and 9944 cyst g À1 dws in Izmir Bay. Studies of dinoflagellate cyst assemblages and abundance have examined mostly the Western Mediterranean (Montresor et al, 1998;Rubino et al, 2000Rubino et al, , 2002Della Tommasa et al, 2004;Zonneveld et al, 2009;Satta et al, 2010). Only a few studies have been recorded on the Eastern Mediterranean (Giannakourou et al, 2005;Uzar et al, 2010;Aydin et al, 2011Aydin et al, , 2014.…”

Section: Discussionmentioning

confidence: 96%

Impact of industrial pollution on recent dinoflagellate cysts in Izmir Bay (Eastern Aegean)

Aydın

Yürür

Uzar

et al. 2015

Marine Pollution Bulletin

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Section: Discussionmentioning

confidence: 96%

Impact of industrial pollution on recent dinoflagellate cysts in Izmir Bay (Eastern Aegean)

Aydın

Yürür

Uzar

et al. 2015

Marine Pollution Bulletin

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“…Changes in deep-water temperatures and particularly the increase of sea-surface temperatures can alter the vertical distribution of coastal species pushing them towards deeper depths, and possibly determining an extinction of vulnerable species at shallow depths (Boero et al 2013;Yasuhara and Danovaro 2016). Changes in temperature might also lead to altered life cycles, inducing dormancy and production of resting stage of phyto-and zooplankton species, which sink and accumulate in deep-sea sediments (Della Tommasa et al 2004). Although, intensive and prolonged warming periods can lead to the presence of episodic mass mortality events (Cerrano et al 2000), most of these species respond to changes in temperature by adapting to warmer conditions and/or modifying their phenology.…”

Section: Temperature Shiftsmentioning

confidence: 99%

Climate change impacts on the biota and on vulnerable habitats of the deep Mediterranean Sea

Danovaro

2018

Rend. Fis. Acc. Lincei

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Deep sea is the largest and likely the most biologically diverse ecosystem of the world, but it is also the most unknown. The Mediterranean Sea (< 1% of the ocean surface and contains only the 0.3% of its volume) is a hot spot of marine biodiversity containing ca 7.5% of the world marine biodiversity, associated with a multitude of habitats spreading from the coast to its dark portion (e.g., coral banks, seamounts, canyons, and hydrothermal vents). Its deep-sea ecosystems are increasingly subjected to direct anthropogenic impacts (including overishing, chemical pollution, dumping, litter, and plastics), which are often over-imposed to the increasing efects of global change. Here, are illustrated the expected impacts of shifts in the main variables such as temperature, food supply, pH, and oxygen on the deep Mediterranean Sea ecosystems. One of the most consequences is related to shifts in the quality and quantity of the inputs of organic matter to the deep sealoor. The deep Mediterranean Sea is far more oligotrophic than other oceans at equal depths, and although deep-sea biota reacts to food shortage by increasing their eiciency in its use, a decrease in food availability can have dramatic efects on its food webs. The deep Mediterranean Sea is showing a clear rise of deep-water temperatures. In the last decades, deep-water warming is accelerating at unprecedented rates, causing a signiicant shift in biodiversity even for variations in the order of 0.1 °C. Higher temperatures increase deep-sea metabolism, thus exacerbating the efects of food limitation. Moreover, ocean acidiication reduces the calciication capacity of corals and alters their metabolism. Although it can be expected that increasing temperatures might increase the potential spread of oxygen minimum zone, so far, only ipoxic events were reported in Mediterranean Sea. The analysis of potential ecosystem vulnerability indicates that the ecosystems that are most sensitive to global change are deep-water coral systems and deep-sea plains. In addition, deep-sea canyons are also likely increasingly subjected to physical disturbance as a result of the increase in the frequency and intensity of climate-driven episodic events. Available information also suggests that biodiversity and ecosystem functioning of the deep Mediterranean Sea is undergoing dramatic changes, which result in accelerated organic matter biogeochemical cycling, miniaturization of the organisms' size, increased metabolism, dominance of the microbial components, and mortality rates of deep-sea biota. Given the high sensitivity of the Mediterranean Sea to global change in comparison with other oceanic regions, and the vulnerability of its deep-sea habitats/ecosystems, speciic policy measures are needed to protect its biodiversity, restore damaged habitats, and increase deep-sea ecosystems resistance and resilience to the ongoing impacts of global change. Keywords Global change • Deep Mediterranean Sea • Deep-sea biology • Ecosystem vulnerability 1 Global Change in the global oceans and trend...

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“…These modifications may trigger local upwelling, which pumps nutrients to the euphotic zone regulating the primary production dynamics (Ryan et al 2005) as well as the entire food web and trophic cascade up to cetaceans (Moors-Murphy 2014). From this point of view, submarine canyons represent a fundamental "two-ways highway" for the transport of sediment, organic matter, larvae, resting stages, nutrients and also pollutants from the shallow waters to the deep sea and conversely (Vetter & Dayton 1998Della Tommasa et al 2004;Boero et al 2019). The environmental heterogeneity, turbidity currents and internal tides affecting canyons (Shepard 1973;Vetter & Dayton 1998Zaniboni et al 2014), the different seafloor characteristics and the bathymetric profile, were recognized as the major factors able to influence the benthic fauna distribution, abundance and diversity (Rowe et al 1982;Louzao et al 2010;McClain & Barry 2010;Vetter et al 2010;Davies et al 2014;Zaniboni et al 2014;Pierdomenico et al 2016;Grinyó et al 2018;Covazzi Harriague et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Macrofaunal communities in the Gioia Canyon (Southern Tyrrhenian Sea, Italy)

Pola

Cerrano

Pica

et al. 2020

The European Zoological Journal

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Submarine canyons play pivotal roles in the physical, biological and ecological processes of coastal areas, especially in closed or semi-closed basins as the Mediterranean Sea, influencing the biodiversity and the abundance of the benthic fauna. On February 2013, during the Tyrrhenian Gravity Flows (TyGraF) campaign, samples have been collected along the Gioia Canyon Basin (Italy) with the aim to describe the taxonomical composition and the abundances of the macrobenthic assemblages, filling the gap of knowledge in this area. A total of 93 taxa were identified, and the Annelida was the phylum with the highest number of specimens and most diversified (46 taxa). The polychaetes Sternaspis scutata, Prionospio cirrifera and Monticellina sp., the bivalves Thyasira sp.1 and Saccella commutata and the amphipods belonging to the genera Ampelisca and Harpinia showed the highest densities in the studied area; however, results suggest low values of the abundances of the macrobenthos if compared with those generally reported for other canyons, both inside and outside the Mediterranean Sea. The marine biotic index (AMBI) highlights that the canyon system and the surrounded area were slightly disturbed and characterized by a high percentage of tolerant taxa. This study is the first baseline for future analyses of the macrobenthic communities of this area.

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Resting stage in the biogenic fraction of surface sediments from the deep Mediterranean Sea

Cited by 9 publications

References 58 publications

Impact of industrial pollution on recent dinoflagellate cysts in Izmir Bay (Eastern Aegean)

Impact of industrial pollution on recent dinoflagellate cysts in Izmir Bay (Eastern Aegean)

Climate change impacts on the biota and on vulnerable habitats of the deep Mediterranean Sea

Macrofaunal communities in the Gioia Canyon (Southern Tyrrhenian Sea, Italy)

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