Raznolikost zooplanktona kao pokazatelj ekološkog stanja jadranskih lokvi

master's thesis

• Title (english): Zooplankton - indicator of ecological status in Mediterranean ponds
• Author: Claudia Fiorentin
• Mentor: Maria Špoljar (mentor)
• Committee member: Maria Špoljar (predsjednik povjerenstva)
• Committee member: Vlasta Ćosović (član povjerenstva)
• Committee member: Ivan Čanjevac (član povjerenstva)
• Committee member: Sven Jelaska (član povjerenstva)
• Committee member: Zorica Petrinec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Science; (Department of Biology); Zagreb
• Defense date and country: 2019-09-17, Croatia
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Biology

Abstract

Mediteranske lokve su plitka vodena tijela koja često presušuju. U prošlosti su bile bitan izvor
vode, a danas su izložene različitim negativnim antropogenim utjecajima. Zooplanktonski
organizmi značajno pridonose bioraznolikosti lokvi, a ujedno su relevantni pokazatelji
ekološkog stanja. Ciljevi ovog rada bili su utvrditi: (i) brojnosti i raznolikost zooplanktona te
dominantne vrste i njihovu ekološku ulogu; (ii) utjecaj okolišnih čimbenika i predacije na sastav
zooplanktona te (iii) povezanost funkcionalnih obilježja zooplanktona i ekološkog stanja kao
osnova prijedloga mjera upravljanja i očuvanja jadranskih lokvi. U deset lokvi determinirano
je 57 zooplanktonskih vrsta, a kolnjaci su dominirali sa 40 vrsta. Rezultati ukazuju da je na
sastav zooplanktona značajno utjecala kompleksnost habitusa makrofita te ribe kao vizualni
predatori. Zooplankton lokvi sa sumberznim makrofitima, bez riba, obilježavala je veća
brojnost i raznolikost, te vrlo dobro ekološko stanje s većim udjelom planktonskih rakova. U
lokvama dobrog ekološkog stanja s dominacijom kolnjaka, bile su prisutne ribe te pokrovnost
emerznim i flotantnim makrofitima. Mala brojnost i raznolikost zooplanktona obilježavala je
lokve umjereno promijenjenog ekološkog stanja s malom pokrovnošću makrofitima.
Antropogeni utjecaji na mediteranske lokve iziskuju sustavno upravljanje i očuvanje lokvi kako
bi se umanjili negativni utjecaji i obnovile njihove ekološke funkcije te očuvala bioraznolikost.

Abstract (english)

Mediterranean ponds are shallow water bodies and often temporary. In the past, they were
important sources of water, and recently are exposed to various negative anthropogenic
impacts. Zooplankton organisms contribute significantly to pond biodiversity and are relevant
indicators of ecological status. The objectives of this study were to establish: (i) the abundance
and diversity of zooplankton and the ecological role of dominant species; (ii) the influence of
environmental factors and predation on zooplankton composition; and (iii) the correlation of
zooplankton functional traits and ecological status as basis for the proposal of management and
conservation of Adriatic ponds. Among 57 zooplankton species, rotifers dominated with 40
species. The results indicate the zooplankton composition was significantly influenced by
complexity of the macrophytes and fish predation. Zooplankton in ponds with submerged
macrophytes, without fish, were characterized by high abundance and diversity in very good
ecological status and higher ratio of planktonic crustaceans. In ponds of good ecological status
with dominance of rotifers, fish were present, and coverage of emergent and flotant
macrophytes. The low abundance and diversity of zooplankton marked ponds of moderately
altered ecological status with scarce macrophyte coverage. Anthropogenic impacts on
Mediterranean ponds require systematic management and conservation to minimize adverse
impacts and restore their ecological functions and preserve biodiversity.

• Keywords: kolnjaci; rašljoticalci; veslonošci; makrofiti; predacija
• Keywords (english): otifers; cladocerans; copepods; macrophytes; predation
• Language: croatian
• URN:NBN: urn:nbn:hr:217:967232
• Study programme: Title: Enviromental Sciences; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra struke znanosti o okolišu (magistar/magistra struke znanosti o okolišu)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-09-26 09:04:22