Perifiton- funkcija i primjena u ocjeni stanja ekosustava

undergraduate thesis

• Title (english): Periphyton – function and application in ecosystem status assessment
• Author: Klaudia Bauk
• Mentor: Marija Gligora Udovič (mentor)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2020-10-02, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Perifiton predstavlja obraštajnu zajednicu algi, cijanobakterija i heterotrofnih
mikroorganizama zajedno spojeni neživim komponentama koje čine EPS i detritus te
naseljavaju slobodne površine predmeta uronjenih u vodu čineći samostalni izdvojeni
mikroekosustav. Perifitoni su sveprisutni u vodenim sustavima i igraju veliku ulogu u
primarnoj proizvodnji i kruženju hranjivih tvari. Na strukturu i sastav perifitonske zajednice
utječu brojni biotički i abiotički čimbenici. S tim u vezi, perifiton je izvrstan biološki pokazatelj
za praćenje promjena u okolišu i ocjenu kakvoće vode. Idealan je pokazatelj onečišćenja
višestrukim zagađivačima, uključujući organske i neorganske toksine.
Diatomeje su najbrojniji i najznačajniji organizmi u zajednici perifitona. Prednosti
perifitona te perifitonskih dijatomeja kao indikatora u procjeni ekološkog stanja i monitoringu
su velika taksonomska raznolikost, kratko generacijsko vrijeme te brz odgovor na stres,
odnosno na promjene okolišnih uvjeta ili kakvoće vode te lakoća korištenja. U Hrvatskoj se za
ocjenu kakvoće vode na temelju fitobentosa koriste dijatomejski indeksi trofički indeks
dijatomeja (TIDHR) i - indeks organskog opterećenja (SIHR) te jedan nedijatomejski indeks
(NeD).

Abstract (english)

Periphyton is a community of algae, cyanobacteria and heterotrophic microorganisms
joined together by abiotic components that make up of EPS and detritus and together they
inhabit the surfaces of objects immersed in water, forming an independent isolated
microecosystem. Periphyton is ubiquitous in aquatic systems and plays a major role in the
primary production and circulation of nutrients. The structure and composition of the periphytic
community are influenced by a number of biotic and abiotic factors. In this regard, periphyton
is an excellent biological indicator for monitoring environmental changes and water quality
assessement. It is an ideal indicator of pollution by multiple pollutants, including organic and
inorganic toxins.
The advantages of periphyton and periphytic diatoms as indicators in the assessment of
ecological status and monitoring are great taxonomic diversity, short generation time and quick
response to stress, ie changes in environmental conditions or water quality and ease of use. In
Croatia, diatomaceous indices, trophic index of diatoms (TIDHR) and - organic load index
(SIHR) and one non-diatomaceous index (NeD) are used to assess water quality based on
phytobenthos.

• Keywords: perifiton
• Language: croatian
• URN:NBN: urn:nbn:hr:217:762972
• Study programme: Title: Environmental Sciences; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-10-20 10:05:00