Coastal lagoons are highly vulnerable to climate change-related pressures. For instance, increasing temperatures promote higher oxygen consumption and anaerobic metabolism which may lead to dystrophic events, this being favored by shallow waters, reduced hydrodynamics and a strong benthic-pelagic coupling. Moreover, in these environments, aquaculture and fishing activities have been developed rapidly during the past few decades, contributing to nutrient over-enrichment and eutrophication. Extreme events, as a consequence of climate change, have a significant impact on the carbon cycle and the dynamics of dissolved organic matter (DOM) in coastal areas. Thus, a concurrent event of hypoxia and acidification could provide an opportunity to study DOM dynamics (and CDOM properties) and its relationship with these phenomena. The effects of oxygen depletion and decreasing pH on the absorption properties of CDOM in coastal lagoons exploited for aquaculture purposes is under-studied. For these reasons, we aim to undertake the following research: (i) to interpret the origin of DOM by comparing the hydrological and biogeochemical characteristics of various compartments (water and sediment) with surrounding geomorphological conditions; (ii) to investigate the spatial-temporal variation of DOC/CDOM; (iii) to assess the relationship between DOM dynamics and oxygen consumption and the effect of acidification on CDOM optical properties in attempt to mitigate coastal hypoxia.

Dinamica della materia organica disciolta in ambienti vulnerabili come le lagune costiere / Specchiulli, A.; Cilenti, L.; Scirocco, T.; Padedda, B. M.; Magni, P. - (2018). (Intervento presentato al convegno I° Workshop Terra, vita e clima: Il ciclo del Carbonio tenutosi a Pisa nel 22-23 novembre 2018).

Dinamica della materia organica disciolta in ambienti vulnerabili come le lagune costiere

Padedda B. M.;
2018-01-01

Abstract

Coastal lagoons are highly vulnerable to climate change-related pressures. For instance, increasing temperatures promote higher oxygen consumption and anaerobic metabolism which may lead to dystrophic events, this being favored by shallow waters, reduced hydrodynamics and a strong benthic-pelagic coupling. Moreover, in these environments, aquaculture and fishing activities have been developed rapidly during the past few decades, contributing to nutrient over-enrichment and eutrophication. Extreme events, as a consequence of climate change, have a significant impact on the carbon cycle and the dynamics of dissolved organic matter (DOM) in coastal areas. Thus, a concurrent event of hypoxia and acidification could provide an opportunity to study DOM dynamics (and CDOM properties) and its relationship with these phenomena. The effects of oxygen depletion and decreasing pH on the absorption properties of CDOM in coastal lagoons exploited for aquaculture purposes is under-studied. For these reasons, we aim to undertake the following research: (i) to interpret the origin of DOM by comparing the hydrological and biogeochemical characteristics of various compartments (water and sediment) with surrounding geomorphological conditions; (ii) to investigate the spatial-temporal variation of DOC/CDOM; (iii) to assess the relationship between DOM dynamics and oxygen consumption and the effect of acidification on CDOM optical properties in attempt to mitigate coastal hypoxia.
2018
Dinamica della materia organica disciolta in ambienti vulnerabili come le lagune costiere / Specchiulli, A.; Cilenti, L.; Scirocco, T.; Padedda, B. M.; Magni, P. - (2018). (Intervento presentato al convegno I° Workshop Terra, vita e clima: Il ciclo del Carbonio tenutosi a Pisa nel 22-23 novembre 2018).
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11388/220372
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact