Macroalgal communities as bioindicator of ecological status of coastal waters in the Adriatic Sea

Nikolić, Vedran (2012) Macroalgal communities as bioindicator of ecological status of coastal waters in the Adriatic Sea. Doctoral thesis, Faculty of Science > Department of Geology.

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Abstract

Macroalgal communities of the rocky bottom in the littoral zone have a significant ecological function. Their biodiversity, biomass, wide distribution, ecological role and permanent attachment to the substrate makes them very appropriate bioindicator of changes in the marine environment. This study examines the advantages of using univariate indicators and biotic indices (number of macroalgal species, macroalgal biomass, macroalgal coverage, Margalef index, Shannon-Wiener index, R/P index, pollution index, ecological groups according to Boudouresque, EEI index and CARLIT index) that use macroalgae for estimation of ecological status of coastal waters. Sampling of macroalgal communities was performed in the middle and southern Adriatic from 2009 to 2011 in the total of 14 stations where destructive sampling from quadrates with the surface of 0,04 m2 was applied at the depth of 0,5 m and in the total of 370 km of coastline where littoral cartography was applied. Results of the application of each bioindicator method was compared to measured values of ecological factors (transparency, dissolved oxygen, nutrients, chlorophyll a, coliform bacteria or LUSI index). The analysis of the results showed that macroalgal biomass, macroalgal coverage and EEI index are not suitable for estimation of ecological status in the investigated area because they do not show any correlation with the measured values of ecological factors as pollution indicators and therefore it is not possible to distinguish pristine from polluted areas. Number of species of macroalgae, Margalef index, Shannon-Wiener index, R/P index and pollution index could be used to evaluate the ecological status in the investigated area because values of these indices showed good correlation with the pollution level. However, methodological constraints limit their application and further investigation is needed. Ecological groups according to Boudouresque and CARLIT index show the best correlation with ecological factors as pollution indicators.

Item Type: Thesis (Doctoral thesis)
Keywords: macroalgae, bioindicator, ecological status, Adriatic Sea, Ecological Evaluation Index, CARLIT
Supervisor: Antolić, Boris
Date: 2012
Number of Pages: 176
Subjects: NATURAL SCIENCES > Geology
NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions: Faculty of Science > Department of Geology
Depositing User: Sonja Borak
Date Deposited: 28 Jan 2014 13:45
Last Modified: 28 Jan 2014 13:45
URI: http://digre.pmf.unizg.hr/id/eprint/276

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