 |
| Titel |
Assess the environmental health status of macrophyte ecosystems using an oxidative stress biomarker. Case studies: The Gulf of Aqaba and the Lagoon of Venice |
| VerfasserIn |
Mohammad Wahsha, Abdul-Salam Juhmani, Alessandro Buosi, Andrea Sfriso, Adriano Sfriso |
| Konferenz |
EGU General Assembly 2017
|
| Medientyp |
Artikel
|
| Sprache |
en
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250149667
|
| Publikation (Nr.) |
 EGU/EGU2017-14041.pdf |
|
|
|
|
|
| Zusammenfassung |
| Macrophytes play a fundamental role in structuring communities in aquatic environments.
They contribute to maintaining the ecosystem services. Unfortunately, nowadays, they are
threatened by different sources of pollution. The release of such potentially toxic elements
(PTEs) to the environment may influence negatively the ecosystem health, which often limits
and sometimes disqualifies the ecosystem biodiversity. Indeed, the increasing concentration
and distribution of PTEs in the marine ecosystem by mismanagement of industrial
activities, overuse of agrochemicals, and waste disposal are causing worldwide
concern.
The aim of this work is to describe the developing of an innovative early warning tool,
based on the implementation of the lipid peroxidation oxidative stress biomarker for the
assessment and monitoring of ecological status in response to PTEs in different marine
environments.
Six sites were selected along the Jordanian coastline of the Gulf of Aqaba and the lagoon
of Venice in Italy according to different morphological, ecological conditions and
anthropogenic impact.
Our results indicated that the effect of PTEs causes oxidative stress to macrophytes; in
particular: Ulva fasciata and Ulva lactuca collected from the lagoon of Venice and Gulf of
Aqaba respectively. The oxidative stress by PTEs alters the biochemical processes, as it
stimulates the generation of reactive oxygen species (ROS) and accordingly the
oxidative degradation of lipids (LPO). The by-products of LPO, the organic compound
malondialdehyde (MDA) is significantly correlated (p<0.05) to the levels of PTEs in the
environment.
We can conclude that despite the numerous analytical methods available, the
determination of isolated substances by traditional chemo- physical analysis has a limited
environmental application. Thus, the implementation of MDA assay as an alternative
diagnostic biomarker tool could be more effectively to recognize changes in the environment
at an early stage.
Keywords: Gulf of Aqaba, lagoon of Venice, macrophytes, lipid peroxidation. |
|
|
|
|
|
|