Title
Efekat višestrukih stresora na multitrofički biodiverzitet barskih ekosistema
Creator
Stamenković, Olivera, 1989-
CONOR:
82511369
Copyright date
2021
Object Links
Select license
Autorstvo-Nekomercijalno-Bez prerade 3.0 Srbija (CC BY-NC-ND 3.0)
License description
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Language
Serbian
Cobiss-ID
Theses Type
Doktorska disertacija
description
Datum odbrane: 11.03.2022.
Other responsibilities
Academic Expertise
Prirodno-matematičke nauke
Academic Title
-
University
Univerzitet u Nišu
Faculty
Prirodno-matematički fakultet
Group
Odsek za biologiju i ekologiju
Alternative title
Effects of multiple-stressors on multitrophic biodiversity of pond ecosystems
: doctoral dissertation
Publisher
[Olivera M. Stamenković]
Format
187 стр.
description
Biobibliografija: str. 181-184,
Bibliografija: str. 139-178.
description
Hydrobiology
Abstract (en)
This study deals with the effects of multiple anthropogenic activities
(i.e. stressors) on the richness and abundance of phytoplankton,
macrophytes, zooplankton, benthic and epiphytic macroinvertebrates,
and fishes, and their trophic groups. Multiple anthropogenic stressors
were integrated in one measure by calculating anthropogenic stress
index. The aim was to compare the responses of different pond
communities to anthropogenic impact, disentangle the potential
mechanisms responsible for variations in pond biodiversity (direct,
water-chemistry mediated, and cascading effects), and to quantify
pond net-community response to anthropogenic impact. In addition,
the importance of pond natural variability on the variations of
biodiversity of pond hydrobiocenoses was analysed.
All communities were sampled in September 2016, from the 18 study
sites distributed across the six permanent ponds that differ in origin,
connectedness, the intensity of a river impact, and the level of pond
coverage in surrounding area.
The effects of anthropogenic stressors varied across the distinct pond
communities, from negative effects on the richness and abundance of
macrophytes and on the richness of epiphytic macroinvertebrates, via
neutral effects on benthic macroinvertebrates, to positive effects on
fish abundance through predominance of the invasive species. The
natural pond variability affected the pond communities and water
chemistry in the majority of cases and it is expected to alter the
effects of anthropogenic stressors on pond communities.
The underlying mechanisms of anthropogenic stressors clearly
differed among different trophic levels. Direct effects were mainly
detected witihin primary producers, while the consumers were mainly
affected indirectly: the increase of nutrient concentrations in water
affected abundance and richness of invertebrate trophic groups, while
cascading effects were the most influential drivers of multitrophic
diversity in the fish community. Despite the variable responses of
different communities and their trophic groups, the total netcommunity
effect of the anthropogenic stressors was negative.
Authors Key words
Antropogene aktivnosti, prirodna varijabilnost,
fitoplankton, makrofite, zooplankton, bentosne
makroinvertebrate, epifitske makroinvertebrate, ribe,
kaskadni efekti, hemizam vode
Authors Key words
Anthropogenic activities, natural variability, phytoplankton,
macrophytes, zooplankton, benthic macroinvertebrates, epiphytic
macroinvertebrates, fishes, cascading effects, water chemistry
Classification
574/575:[574.5=556.58
Subject
B 003; B260
Type
Tekst
Abstract (en)
This study deals with the effects of multiple anthropogenic activities
(i.e. stressors) on the richness and abundance of phytoplankton,
macrophytes, zooplankton, benthic and epiphytic macroinvertebrates,
and fishes, and their trophic groups. Multiple anthropogenic stressors
were integrated in one measure by calculating anthropogenic stress
index. The aim was to compare the responses of different pond
communities to anthropogenic impact, disentangle the potential
mechanisms responsible for variations in pond biodiversity (direct,
water-chemistry mediated, and cascading effects), and to quantify
pond net-community response to anthropogenic impact. In addition,
the importance of pond natural variability on the variations of
biodiversity of pond hydrobiocenoses was analysed.
All communities were sampled in September 2016, from the 18 study
sites distributed across the six permanent ponds that differ in origin,
connectedness, the intensity of a river impact, and the level of pond
coverage in surrounding area.
The effects of anthropogenic stressors varied across the distinct pond
communities, from negative effects on the richness and abundance of
macrophytes and on the richness of epiphytic macroinvertebrates, via
neutral effects on benthic macroinvertebrates, to positive effects on
fish abundance through predominance of the invasive species. The
natural pond variability affected the pond communities and water
chemistry in the majority of cases and it is expected to alter the
effects of anthropogenic stressors on pond communities.
The underlying mechanisms of anthropogenic stressors clearly
differed among different trophic levels. Direct effects were mainly
detected witihin primary producers, while the consumers were mainly
affected indirectly: the increase of nutrient concentrations in water
affected abundance and richness of invertebrate trophic groups, while
cascading effects were the most influential drivers of multitrophic
diversity in the fish community. Despite the variable responses of
different communities and their trophic groups, the total netcommunity
effect of the anthropogenic stressors was negative.
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