TY  - JOUR
AU  - Vermaat, Jan E.
AU  - Biberdžić, Vera
AU  - Braho, Vjola
AU  - Budzakoska Gjoreska, Biljana
AU  - Cara, Magdalena
AU  - Dana, Zamira
AU  - Đurašković, Pavle
AU  - Eriksen, Tor Erik
AU  - Hjermann, Dag
AU  - Imeri, Alma
AU  - Jovanović, Katarina
AU  - Krizmanić, Jelena
AU  - Kupe, Lirika
AU  - Loshkoska, Tatjana
AU  - Lynn Kemp, Joanna
AU  - Marković, Aleksandra
AU  - Patceva, Suzana
AU  - Rakočević, Jelena
AU  - Stojanović, Katarina
AU  - Talevska, Marina
AU  - Trajanovska, Sonja
AU  - Trajanovski, Sasho
AU  - Veljanoska-Sarafiloska, Elizabeta
AU  - Vidaković, Danijela
AU  - Zdraveski, Konstantin
AU  - Živić, Ivana
AU  - C. Schneider, Susanne
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4752
AB  - Along six transects in each of six lakes across the Western Balkans, we collected data for three groups of littoral biological water quality indicators: epilithic diatoms, macrophytes, and benthic invertebrates. We assessed the relationships between them and three environmental pressures: nutrient load (eutrophication), hydro-morphological alteration of the shoreline, and water level variation, separating the effect of individual lakes and continuous explanatory variables. Lake water total phosphorus concentration (TP) showed substantial variation but was not related to any of the tested biological indicators, nor to any of the tested pressures. We suggest that this may be due to feedback processes such as P removal in the lake littoral zone. Instead, we found that a gradient in surrounding land-use towards increasing urbanization, and a land-use-based estimate of P run-off, served as a better descriptor of eutrophication. Overall, eutrophication and water level fluctuation were most important for explaining variation in the assessed indicators, whereas shoreline hydro-morphological alteration was less important. Diatom indicators were most responsive to all three pressures, whereas macrophyte biomass and species number responded only to water level fluctuation. The Trophic Diatom Index for Lakes (TDIL) was negatively related to urbanization and wave exposure. This indicates that it is a suitable indicator for pressures related to urbanization, although a confounding effect of wave exposure is possible. Invertebrate abundance responded strongly to eutrophication, but the indicator based on taxonomic composition (Average Score Per Taxon) did not. Our results suggest that our metrics can be applied in Western Balkan lakes, despite the high number of endemic species present in some of these lakes. We argue that local water management should focus on abating the causes of eutrophication and water level fluctuation, whilst preserving sufficient lengths of undeveloped shoreline to ensure good water quality in the long run.
PB  - Elsevier
T2  - Science of the Total Environment
T1  - Relating environmental pressures to littoral biological water quality indicators in Western Balkan lakes: Can we fill the largest gaps?
VL  - 804
SP  - 150160
DO  - 10.1016/j.scitotenv.2021.150160
ER  - 

@article{
author = "Vermaat, Jan E. and Biberdžić, Vera and Braho, Vjola and Budzakoska Gjoreska, Biljana and Cara, Magdalena and Dana, Zamira and Đurašković, Pavle and Eriksen, Tor Erik and Hjermann, Dag and Imeri, Alma and Jovanović, Katarina and Krizmanić, Jelena and Kupe, Lirika and Loshkoska, Tatjana and Lynn Kemp, Joanna and Marković, Aleksandra and Patceva, Suzana and Rakočević, Jelena and Stojanović, Katarina and Talevska, Marina and Trajanovska, Sonja and Trajanovski, Sasho and Veljanoska-Sarafiloska, Elizabeta and Vidaković, Danijela and Zdraveski, Konstantin and Živić, Ivana and C. Schneider, Susanne",
year = "2022",
abstract = "Along six transects in each of six lakes across the Western Balkans, we collected data for three groups of littoral biological water quality indicators: epilithic diatoms, macrophytes, and benthic invertebrates. We assessed the relationships between them and three environmental pressures: nutrient load (eutrophication), hydro-morphological alteration of the shoreline, and water level variation, separating the effect of individual lakes and continuous explanatory variables. Lake water total phosphorus concentration (TP) showed substantial variation but was not related to any of the tested biological indicators, nor to any of the tested pressures. We suggest that this may be due to feedback processes such as P removal in the lake littoral zone. Instead, we found that a gradient in surrounding land-use towards increasing urbanization, and a land-use-based estimate of P run-off, served as a better descriptor of eutrophication. Overall, eutrophication and water level fluctuation were most important for explaining variation in the assessed indicators, whereas shoreline hydro-morphological alteration was less important. Diatom indicators were most responsive to all three pressures, whereas macrophyte biomass and species number responded only to water level fluctuation. The Trophic Diatom Index for Lakes (TDIL) was negatively related to urbanization and wave exposure. This indicates that it is a suitable indicator for pressures related to urbanization, although a confounding effect of wave exposure is possible. Invertebrate abundance responded strongly to eutrophication, but the indicator based on taxonomic composition (Average Score Per Taxon) did not. Our results suggest that our metrics can be applied in Western Balkan lakes, despite the high number of endemic species present in some of these lakes. We argue that local water management should focus on abating the causes of eutrophication and water level fluctuation, whilst preserving sufficient lengths of undeveloped shoreline to ensure good water quality in the long run.",
publisher = "Elsevier",
journal = "Science of the Total Environment",
title = "Relating environmental pressures to littoral biological water quality indicators in Western Balkan lakes: Can we fill the largest gaps?",
volume = "804",
pages = "150160",
doi = "10.1016/j.scitotenv.2021.150160"
}

Vermaat, J. E., Biberdžić, V., Braho, V., Budzakoska Gjoreska, B., Cara, M., Dana, Z., Đurašković, P., Eriksen, T. E., Hjermann, D., Imeri, A., Jovanović, K., Krizmanić, J., Kupe, L., Loshkoska, T., Lynn Kemp, J., Marković, A., Patceva, S., Rakočević, J., Stojanović, K., Talevska, M., Trajanovska, S., Trajanovski, S., Veljanoska-Sarafiloska, E., Vidaković, D., Zdraveski, K., Živić, I.,& C. Schneider, S.. (2022). Relating environmental pressures to littoral biological water quality indicators in Western Balkan lakes: Can we fill the largest gaps?. in Science of the Total Environment
Elsevier., 804, 150160.
https://doi.org/10.1016/j.scitotenv.2021.150160

Vermaat JE, Biberdžić V, Braho V, Budzakoska Gjoreska B, Cara M, Dana Z, Đurašković P, Eriksen TE, Hjermann D, Imeri A, Jovanović K, Krizmanić J, Kupe L, Loshkoska T, Lynn Kemp J, Marković A, Patceva S, Rakočević J, Stojanović K, Talevska M, Trajanovska S, Trajanovski S, Veljanoska-Sarafiloska E, Vidaković D, Zdraveski K, Živić I, C. Schneider S. Relating environmental pressures to littoral biological water quality indicators in Western Balkan lakes: Can we fill the largest gaps?. in Science of the Total Environment. 2022;804:150160.
doi:10.1016/j.scitotenv.2021.150160 .

Vermaat, Jan E., Biberdžić, Vera, Braho, Vjola, Budzakoska Gjoreska, Biljana, Cara, Magdalena, Dana, Zamira, Đurašković, Pavle, Eriksen, Tor Erik, Hjermann, Dag, Imeri, Alma, Jovanović, Katarina, Krizmanić, Jelena, Kupe, Lirika, Loshkoska, Tatjana, Lynn Kemp, Joanna, Marković, Aleksandra, Patceva, Suzana, Rakočević, Jelena, Stojanović, Katarina, Talevska, Marina, Trajanovska, Sonja, Trajanovski, Sasho, Veljanoska-Sarafiloska, Elizabeta, Vidaković, Danijela, Zdraveski, Konstantin, Živić, Ivana, C. Schneider, Susanne, "Relating environmental pressures to littoral biological water quality indicators in Western Balkan lakes: Can we fill the largest gaps?" in Science of the Total Environment, 804 (2022):150160,
https://doi.org/10.1016/j.scitotenv.2021.150160 . .

TY  - JOUR
AU  - Schneider, Susanne C.
AU  - Biberdžić, Vera
AU  - Braho, Vjola
AU  - Budzakoska Gjoreska, Biljana
AU  - Cara, Magdalena
AU  - Dana, Zamira
AU  - Đurašković, Pavle
AU  - Eriksen, Tor Erik
AU  - Hjermann, Dag
AU  - Imeri, Alma
AU  - Jovanović, Katarina
AU  - Krizmanić, Jelena
AU  - Kupe, Lirika
AU  - Loshkoska, Tatjana
AU  - Lynn Kemp, Joanna
AU  - Marković, Aleksandra
AU  - Patceva, Suzana
AU  - Rakočević, Jelena
AU  - Stojanović, Katarina
AU  - Talevska, Marina
AU  - Trajanovska, Sonja
AU  - Trajanovski, Sasho
AU  - Veljanoska-Sarafiloska, Elizabeta
AU  - Vidaković, Danijela
AU  - Zdraveski, Konstantin
AU  - Živić, Ivana
AU  - Vermaat, Jan E.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3674
AB  - Biological assessmentmetrics and water chemistry measurements are used to quantify the link between stressors
and their effects on lake ecosystems, for the Water Framework Directive. However, correlations between metrics
andwater chemistry are often poor. This is seen as majorweaknesses ofWater Framework Directive-relatedmonitoring
and assessment.We analyzed macrophytes, benthic algae, benthic macroinvertebrates, water chemistry
and sediment total phosphorus content in the littoral of six lakes in the Western Balkans and used CORINE land
use data to estimate nutrient enrichment via runoff from the adjacent land. Lakes with a higher estimated phosphorus
runoff fromthe adjacent land did not have higher littoralwater nutrient concentrations, but littoral diatom
assemblages indicated more eutrophic conditions. These lakes also had higher abundances of littoral benthic primaryproducers,
which in turnwere associatedwithlowconcentrations of dissolved nutrients, but only in autumn,
not in spring. This is consistent with primary producers taking up nutrients during the summer growth season. In
lakeswith high abundances of benthic primary producers, it is likely that the littoral vegetation plays a large role in
the transfer of nutrients from the water to the benthos. This process impairs correlations between biological metrics
and water nutrient concentrations. Our results suggest that CORINE land cover may be more useful to characterize
littoral nutrient enrichment than lake water chemistry. Increased benthic primary producer biomasses and
“eutrophic” diatom indicesmay indicate littoral nutrient enrichment even ifwater nutrient concentrations are low
PB  - Elsevier
T2  - Science of the Total Environment
T1  - Littoral eutrophication indicators are more closely related to nearshore land use than to water nutrient concentrations: A critical evaluation of stressor-response relationships
VL  - 748
SP  - 141193
DO  - 10.1016/j.scitotenv.2020.141193
ER  - 

@article{
author = "Schneider, Susanne C. and Biberdžić, Vera and Braho, Vjola and Budzakoska Gjoreska, Biljana and Cara, Magdalena and Dana, Zamira and Đurašković, Pavle and Eriksen, Tor Erik and Hjermann, Dag and Imeri, Alma and Jovanović, Katarina and Krizmanić, Jelena and Kupe, Lirika and Loshkoska, Tatjana and Lynn Kemp, Joanna and Marković, Aleksandra and Patceva, Suzana and Rakočević, Jelena and Stojanović, Katarina and Talevska, Marina and Trajanovska, Sonja and Trajanovski, Sasho and Veljanoska-Sarafiloska, Elizabeta and Vidaković, Danijela and Zdraveski, Konstantin and Živić, Ivana and Vermaat, Jan E.",
year = "2020",
abstract = "Biological assessmentmetrics and water chemistry measurements are used to quantify the link between stressors
and their effects on lake ecosystems, for the Water Framework Directive. However, correlations between metrics
andwater chemistry are often poor. This is seen as majorweaknesses ofWater Framework Directive-relatedmonitoring
and assessment.We analyzed macrophytes, benthic algae, benthic macroinvertebrates, water chemistry
and sediment total phosphorus content in the littoral of six lakes in the Western Balkans and used CORINE land
use data to estimate nutrient enrichment via runoff from the adjacent land. Lakes with a higher estimated phosphorus
runoff fromthe adjacent land did not have higher littoralwater nutrient concentrations, but littoral diatom
assemblages indicated more eutrophic conditions. These lakes also had higher abundances of littoral benthic primaryproducers,
which in turnwere associatedwithlowconcentrations of dissolved nutrients, but only in autumn,
not in spring. This is consistent with primary producers taking up nutrients during the summer growth season. In
lakeswith high abundances of benthic primary producers, it is likely that the littoral vegetation plays a large role in
the transfer of nutrients from the water to the benthos. This process impairs correlations between biological metrics
and water nutrient concentrations. Our results suggest that CORINE land cover may be more useful to characterize
littoral nutrient enrichment than lake water chemistry. Increased benthic primary producer biomasses and
“eutrophic” diatom indicesmay indicate littoral nutrient enrichment even ifwater nutrient concentrations are low",
publisher = "Elsevier",
journal = "Science of the Total Environment",
title = "Littoral eutrophication indicators are more closely related to nearshore land use than to water nutrient concentrations: A critical evaluation of stressor-response relationships",
volume = "748",
pages = "141193",
doi = "10.1016/j.scitotenv.2020.141193"
}

Schneider, S. C., Biberdžić, V., Braho, V., Budzakoska Gjoreska, B., Cara, M., Dana, Z., Đurašković, P., Eriksen, T. E., Hjermann, D., Imeri, A., Jovanović, K., Krizmanić, J., Kupe, L., Loshkoska, T., Lynn Kemp, J., Marković, A., Patceva, S., Rakočević, J., Stojanović, K., Talevska, M., Trajanovska, S., Trajanovski, S., Veljanoska-Sarafiloska, E., Vidaković, D., Zdraveski, K., Živić, I.,& Vermaat, J. E.. (2020). Littoral eutrophication indicators are more closely related to nearshore land use than to water nutrient concentrations: A critical evaluation of stressor-response relationships. in Science of the Total Environment
Elsevier., 748, 141193.
https://doi.org/10.1016/j.scitotenv.2020.141193

Schneider SC, Biberdžić V, Braho V, Budzakoska Gjoreska B, Cara M, Dana Z, Đurašković P, Eriksen TE, Hjermann D, Imeri A, Jovanović K, Krizmanić J, Kupe L, Loshkoska T, Lynn Kemp J, Marković A, Patceva S, Rakočević J, Stojanović K, Talevska M, Trajanovska S, Trajanovski S, Veljanoska-Sarafiloska E, Vidaković D, Zdraveski K, Živić I, Vermaat JE. Littoral eutrophication indicators are more closely related to nearshore land use than to water nutrient concentrations: A critical evaluation of stressor-response relationships. in Science of the Total Environment. 2020;748:141193.
doi:10.1016/j.scitotenv.2020.141193 .

Schneider, Susanne C., Biberdžić, Vera, Braho, Vjola, Budzakoska Gjoreska, Biljana, Cara, Magdalena, Dana, Zamira, Đurašković, Pavle, Eriksen, Tor Erik, Hjermann, Dag, Imeri, Alma, Jovanović, Katarina, Krizmanić, Jelena, Kupe, Lirika, Loshkoska, Tatjana, Lynn Kemp, Joanna, Marković, Aleksandra, Patceva, Suzana, Rakočević, Jelena, Stojanović, Katarina, Talevska, Marina, Trajanovska, Sonja, Trajanovski, Sasho, Veljanoska-Sarafiloska, Elizabeta, Vidaković, Danijela, Zdraveski, Konstantin, Živić, Ivana, Vermaat, Jan E., "Littoral eutrophication indicators are more closely related to nearshore land use than to water nutrient concentrations: A critical evaluation of stressor-response relationships" in Science of the Total Environment, 748 (2020):141193,
https://doi.org/10.1016/j.scitotenv.2020.141193 . .

TY  - JOUR
AU  - Vidaković, Danijela
AU  - Krizmanić, Jelena
AU  - Ndoj, Eriselda
AU  - Miho, Aleko
AU  - Kupe, Lirika
AU  - Schneider, Susanne C.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3607
AB  - Great Lake is the largest of 14 lakes situated in Lurë National Park, in the eastern part of the Lurë Mountains, Albania. To characterize lake ecological status, epiphytic and epilithic diatom samples were collected from the lakeshore in summer 2005, 2013, and 2017. However, in 2017 no macrophytes were present, such that only epilithic diatom samples could be collected. After laboratory analysis, 52 diatom taxa were identified in July 2005, 67 in June 2013, 111 in August 2013, and 126 in August 2017. The genera Diatoma, Epithemia, Fragilaria, and Surirella were not recorded in 2017, contrary to previous years.We applied two diatom indices to asses the ecological status of the Great Lake, IPS (Indice de Polluo–sensibilité), and TDIL (Trophic Diatom Index for lakes). The IPS index indicated very good water quality in all years, while the TDIL indicated moderate water quality in 2005 and 2013 and good water quality in 2017. Because more species have indicator values for calculating the IPS than the TDIL (valve number used to calculate the IPS was above 95%, while for TDIL was below 50% of 400 counted valves), the IPS may be a more promising tool for bioindication of lakes in Albania according to the demands of the Water Framework Directive.
PB  - Springer Nature Switzerland AG 2020
T2  - Biologia
T1  - Changes in the diatom community in the great lake (Lurë National Park, Albania) from 2005 to 2017 and first steps towards assessment the water quality
VL  - 75
SP  - 1815
EP  - 1824
DO  - 10.2478/s11756-020-00538-3
ER  - 

@article{
author = "Vidaković, Danijela and Krizmanić, Jelena and Ndoj, Eriselda and Miho, Aleko and Kupe, Lirika and Schneider, Susanne C.",
year = "2020",
abstract = "Great Lake is the largest of 14 lakes situated in Lurë National Park, in the eastern part of the Lurë Mountains, Albania. To characterize lake ecological status, epiphytic and epilithic diatom samples were collected from the lakeshore in summer 2005, 2013, and 2017. However, in 2017 no macrophytes were present, such that only epilithic diatom samples could be collected. After laboratory analysis, 52 diatom taxa were identified in July 2005, 67 in June 2013, 111 in August 2013, and 126 in August 2017. The genera Diatoma, Epithemia, Fragilaria, and Surirella were not recorded in 2017, contrary to previous years.We applied two diatom indices to asses the ecological status of the Great Lake, IPS (Indice de Polluo–sensibilité), and TDIL (Trophic Diatom Index for lakes). The IPS index indicated very good water quality in all years, while the TDIL indicated moderate water quality in 2005 and 2013 and good water quality in 2017. Because more species have indicator values for calculating the IPS than the TDIL (valve number used to calculate the IPS was above 95%, while for TDIL was below 50% of 400 counted valves), the IPS may be a more promising tool for bioindication of lakes in Albania according to the demands of the Water Framework Directive.",
publisher = "Springer Nature Switzerland AG 2020",
journal = "Biologia",
title = "Changes in the diatom community in the great lake (Lurë National Park, Albania) from 2005 to 2017 and first steps towards assessment the water quality",
volume = "75",
pages = "1815-1824",
doi = "10.2478/s11756-020-00538-3"
}

Vidaković, D., Krizmanić, J., Ndoj, E., Miho, A., Kupe, L.,& Schneider, S. C.. (2020). Changes in the diatom community in the great lake (Lurë National Park, Albania) from 2005 to 2017 and first steps towards assessment the water quality. in Biologia
Springer Nature Switzerland AG 2020., 75, 1815-1824.
https://doi.org/10.2478/s11756-020-00538-3

Vidaković D, Krizmanić J, Ndoj E, Miho A, Kupe L, Schneider SC. Changes in the diatom community in the great lake (Lurë National Park, Albania) from 2005 to 2017 and first steps towards assessment the water quality. in Biologia. 2020;75:1815-1824.
doi:10.2478/s11756-020-00538-3 .

Vidaković, Danijela, Krizmanić, Jelena, Ndoj, Eriselda, Miho, Aleko, Kupe, Lirika, Schneider, Susanne C., "Changes in the diatom community in the great lake (Lurë National Park, Albania) from 2005 to 2017 and first steps towards assessment the water quality" in Biologia, 75 (2020):1815-1824,
https://doi.org/10.2478/s11756-020-00538-3 . .

TY  - CONF
AU  - Vidaković, Danijela
AU  - Rakočević, Jelena
AU  - Patceva, Suzana
AU  - Loshkoska, Tatjana
AU  - Kupe, Lirika
AU  - Jovanović, Katarina
AU  - Veljanoska Sarafiloska, Elizabeta
AU  - Cara, Magdalena
AU  - Đurašković, Pavle
AU  - Braho, Vjola
AU  - Duka, Irena
AU  - Schneider, Susanne
AU  - Krizmanić, Jelena
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4623
AB  - During 2016-2017 six Balkan lakes were investigated: Sava Lake in Serbia, Ohrid Lake and Prespa Lake in North Macedonia and Albania, Great Lake in Albania, Biogradsko Lake and Crno Lake in Montenegro. Epilithic diatom samples were collected from 6 localities around each lake with the aim to test the applicability of diatom indices for ecological assessment of Balkan lakes. Also, water samples for chemical analysis were taken. Based on the concentrations of total phosphorus and BOD (biochemical oxygen demand) two lakes (Ohrid and Crno) were oligotrophic and oligosaprobic, while the other four lakes were mesotrophic and β-mesosaprobic, respectively. The highest diversity of dominant taxa was recorded in Ohrid and Prespa, and one of the dominant taxa was the endemic species Gomphonema paratergestinum. Diatom communities in lakes Sava and Crno were dominated by Achnanthidim minutissimum and Encyonopsis microcephala. According to Serbian legislation, the IPS index is used for the assessment of the ecological status of lakes, while in North Macedonia, Albania and Montenegro National Monitoring Systems do not yet include officially accepted diatom indices. In our results, the diatom indices IPS and IBD had the highest inclusion of diatom taxa, in some lakes almost 100%. The lowest inclusion of diatom taxa had the TDIL index. Values of IPS and IBD indices indicated very good water quality for Great Lake, Crno and Biogradsko, and good for Prespa. The water quality of Ohrid and Sava was between very good and good. Values of trophic indices (Rott TI and TDIL) indicated a very low concentration of nutrients in the Sava, Great Lake and Biogradsko, low in Ohrid and Prespa and low to the very low concentration of nutrients in Crno. The development and establishment of monitoring systems in lakes according to the requirements of the Water Framework Directive (WFD) is essential for all European countries and more comprehensive ecological investigations of Balkan lakes are necessary to be able to fulfill these demands.
PB  - Taylor & Francis
C3  - European Journal of Phycology (Posters)
T1  - Testing the applicability of diatom indices for ecological assessment of Balkan lakes
VL  - 54
IS  - sup1
SP  - 191
EP  - 192
DO  - 10.1080/09670262.2019.1626628
ER  - 

@conference{
author = "Vidaković, Danijela and Rakočević, Jelena and Patceva, Suzana and Loshkoska, Tatjana and Kupe, Lirika and Jovanović, Katarina and Veljanoska Sarafiloska, Elizabeta and Cara, Magdalena and Đurašković, Pavle and Braho, Vjola and Duka, Irena and Schneider, Susanne and Krizmanić, Jelena",
year = "2019",
abstract = "During 2016-2017 six Balkan lakes were investigated: Sava Lake in Serbia, Ohrid Lake and Prespa Lake in North Macedonia and Albania, Great Lake in Albania, Biogradsko Lake and Crno Lake in Montenegro. Epilithic diatom samples were collected from 6 localities around each lake with the aim to test the applicability of diatom indices for ecological assessment of Balkan lakes. Also, water samples for chemical analysis were taken. Based on the concentrations of total phosphorus and BOD (biochemical oxygen demand) two lakes (Ohrid and Crno) were oligotrophic and oligosaprobic, while the other four lakes were mesotrophic and β-mesosaprobic, respectively. The highest diversity of dominant taxa was recorded in Ohrid and Prespa, and one of the dominant taxa was the endemic species Gomphonema paratergestinum. Diatom communities in lakes Sava and Crno were dominated by Achnanthidim minutissimum and Encyonopsis microcephala. According to Serbian legislation, the IPS index is used for the assessment of the ecological status of lakes, while in North Macedonia, Albania and Montenegro National Monitoring Systems do not yet include officially accepted diatom indices. In our results, the diatom indices IPS and IBD had the highest inclusion of diatom taxa, in some lakes almost 100%. The lowest inclusion of diatom taxa had the TDIL index. Values of IPS and IBD indices indicated very good water quality for Great Lake, Crno and Biogradsko, and good for Prespa. The water quality of Ohrid and Sava was between very good and good. Values of trophic indices (Rott TI and TDIL) indicated a very low concentration of nutrients in the Sava, Great Lake and Biogradsko, low in Ohrid and Prespa and low to the very low concentration of nutrients in Crno. The development and establishment of monitoring systems in lakes according to the requirements of the Water Framework Directive (WFD) is essential for all European countries and more comprehensive ecological investigations of Balkan lakes are necessary to be able to fulfill these demands.",
publisher = "Taylor & Francis",
journal = "European Journal of Phycology (Posters)",
title = "Testing the applicability of diatom indices for ecological assessment of Balkan lakes",
volume = "54",
number = "sup1",
pages = "191-192",
doi = "10.1080/09670262.2019.1626628"
}

Vidaković, D., Rakočević, J., Patceva, S., Loshkoska, T., Kupe, L., Jovanović, K., Veljanoska Sarafiloska, E., Cara, M., Đurašković, P., Braho, V., Duka, I., Schneider, S.,& Krizmanić, J.. (2019). Testing the applicability of diatom indices for ecological assessment of Balkan lakes. in European Journal of Phycology (Posters)
Taylor & Francis., 54(sup1), 191-192.
https://doi.org/10.1080/09670262.2019.1626628

Vidaković D, Rakočević J, Patceva S, Loshkoska T, Kupe L, Jovanović K, Veljanoska Sarafiloska E, Cara M, Đurašković P, Braho V, Duka I, Schneider S, Krizmanić J. Testing the applicability of diatom indices for ecological assessment of Balkan lakes. in European Journal of Phycology (Posters). 2019;54(sup1):191-192.
doi:10.1080/09670262.2019.1626628 .

Vidaković, Danijela, Rakočević, Jelena, Patceva, Suzana, Loshkoska, Tatjana, Kupe, Lirika, Jovanović, Katarina, Veljanoska Sarafiloska, Elizabeta, Cara, Magdalena, Đurašković, Pavle, Braho, Vjola, Duka, Irena, Schneider, Susanne, Krizmanić, Jelena, "Testing the applicability of diatom indices for ecological assessment of Balkan lakes" in European Journal of Phycology (Posters), 54, no. sup1 (2019):191-192,
https://doi.org/10.1080/09670262.2019.1626628 . .

TY  - CONF
AU  - Vidaković, Danijela
AU  - Krizmanić, Jelena
AU  - Levkov, Zlatko
AU  - Rakočević, Jelena
AU  - Loshkoska, Tatjana
AU  - Patceva, Suzana
AU  - Kupe, Lirika
AU  - Schneider, Susanne
PY  - 2018
UR  - https://www.botanischer-garten-berlin.de/sites/default/files/25th_international_diatom_symposium_berlin_2018_abstracts.pdf
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4647
AB  - Over the past decade a great number of new diatom taxa was described, as well as re-definitions and delimitations of taxa from different species complexes have been performed. The reasons for the constant increase in the number of described diatom taxa are numerous: unexplored habitats, improved light microscope resolution and digital cameras with accompanying softwares, scanning electron microscopy, molecular studies. For most of the newly-described species only morphological characteristics are known. What about their ecological preferences?
OMNIDIA is a widely used software for evaluation of ecological status of water bodies based on diatoms. The database from the first version of the software up to today has grown from 2035 to more than 23.000 diatom taxa. However, for the most newly-described taxa there are no indicator values.
In our study we evaluated the ecological status at six sites in lakes Ohrid and Prespa, respectively, based on different biological quality elements (diatoms, macrozoobenthos and macrophytes) as well as water chemistry. In two out of six sites in lake Ohrid, and five out of six sites in lake Prespa, Gomphonema paratergestinum was a dominant or subdominant species (33.5-69.66 % in Ohrid Lake and 9.95-65.34 % in Prespa Lake). In the OMNIDIA software, there currently are no indicator values for G. paratergestinum. However, the very similar species G. tergestinum has well known indictor values. G. paratergestinum resembles G. tergestinum with respect to some morphological characteristics (e.g. valve outline), but can be differentiated by the stria density. Both species were present in lakes Ohrid and Prespa, however, with dominance of G. paratergestinum. Based on the diatoms recorded at a site, OMNIDIA calculates diatom index values. How could G. paratergestinum with abundances up to 69.66 % influence diatom indices? If we “experiment” and substitute G. paratergestinum with G. tergestinum, the obtained diatom index values indicated a completely different ecological quality class.
Every newly-described species is important since it increases our knowledge about diversity, biogeography and distribution of diatoms. However, there still is a gap between taxonomy and biomonitoring. How can we overcome this problem? According to the Botanical Nomenclature Code for algae, fungi, and plants no note or suggestion regarding ecology or ecological preferences of a species is required for description. Maybe, a possible solution could be that in the description of the species ecological data, such as pH, conductivity, total phosphorus, concentrations of different anions etc. should be included. Scientists today join forces to review material and species collected by Kützing, Ehrenberg, Grunow, Van Heurck, Cleve etc... In the same way ecological data of newly-described species could be assembled and their indicator values calculated.
PB  - Berlin : Botanic Garden and Botanical Museum, Berlin Freie Universität Berlin
C3  - Abstracts of the 25th International Diatom Symposium
T1  - How do newly-described diatom species affect biomonitoring? – An example of Gomphonema paratergestinum vs. G. tergestinum
SP  - 182
EP  - 182
DO  - 10.3372/ids2018
ER  - 

@conference{
author = "Vidaković, Danijela and Krizmanić, Jelena and Levkov, Zlatko and Rakočević, Jelena and Loshkoska, Tatjana and Patceva, Suzana and Kupe, Lirika and Schneider, Susanne",
year = "2018",
abstract = "Over the past decade a great number of new diatom taxa was described, as well as re-definitions and delimitations of taxa from different species complexes have been performed. The reasons for the constant increase in the number of described diatom taxa are numerous: unexplored habitats, improved light microscope resolution and digital cameras with accompanying softwares, scanning electron microscopy, molecular studies. For most of the newly-described species only morphological characteristics are known. What about their ecological preferences?
OMNIDIA is a widely used software for evaluation of ecological status of water bodies based on diatoms. The database from the first version of the software up to today has grown from 2035 to more than 23.000 diatom taxa. However, for the most newly-described taxa there are no indicator values.
In our study we evaluated the ecological status at six sites in lakes Ohrid and Prespa, respectively, based on different biological quality elements (diatoms, macrozoobenthos and macrophytes) as well as water chemistry. In two out of six sites in lake Ohrid, and five out of six sites in lake Prespa, Gomphonema paratergestinum was a dominant or subdominant species (33.5-69.66 % in Ohrid Lake and 9.95-65.34 % in Prespa Lake). In the OMNIDIA software, there currently are no indicator values for G. paratergestinum. However, the very similar species G. tergestinum has well known indictor values. G. paratergestinum resembles G. tergestinum with respect to some morphological characteristics (e.g. valve outline), but can be differentiated by the stria density. Both species were present in lakes Ohrid and Prespa, however, with dominance of G. paratergestinum. Based on the diatoms recorded at a site, OMNIDIA calculates diatom index values. How could G. paratergestinum with abundances up to 69.66 % influence diatom indices? If we “experiment” and substitute G. paratergestinum with G. tergestinum, the obtained diatom index values indicated a completely different ecological quality class.
Every newly-described species is important since it increases our knowledge about diversity, biogeography and distribution of diatoms. However, there still is a gap between taxonomy and biomonitoring. How can we overcome this problem? According to the Botanical Nomenclature Code for algae, fungi, and plants no note or suggestion regarding ecology or ecological preferences of a species is required for description. Maybe, a possible solution could be that in the description of the species ecological data, such as pH, conductivity, total phosphorus, concentrations of different anions etc. should be included. Scientists today join forces to review material and species collected by Kützing, Ehrenberg, Grunow, Van Heurck, Cleve etc... In the same way ecological data of newly-described species could be assembled and their indicator values calculated.",
publisher = "Berlin : Botanic Garden and Botanical Museum, Berlin Freie Universität Berlin",
journal = "Abstracts of the 25th International Diatom Symposium",
title = "How do newly-described diatom species affect biomonitoring? – An example of Gomphonema paratergestinum vs. G. tergestinum",
pages = "182-182",
doi = "10.3372/ids2018"
}

Vidaković, D., Krizmanić, J., Levkov, Z., Rakočević, J., Loshkoska, T., Patceva, S., Kupe, L.,& Schneider, S.. (2018). How do newly-described diatom species affect biomonitoring? – An example of Gomphonema paratergestinum vs. G. tergestinum. in Abstracts of the 25th International Diatom Symposium
Berlin : Botanic Garden and Botanical Museum, Berlin Freie Universität Berlin., 182-182.
https://doi.org/10.3372/ids2018

Vidaković D, Krizmanić J, Levkov Z, Rakočević J, Loshkoska T, Patceva S, Kupe L, Schneider S. How do newly-described diatom species affect biomonitoring? – An example of Gomphonema paratergestinum vs. G. tergestinum. in Abstracts of the 25th International Diatom Symposium. 2018;:182-182.
doi:10.3372/ids2018 .

Vidaković, Danijela, Krizmanić, Jelena, Levkov, Zlatko, Rakočević, Jelena, Loshkoska, Tatjana, Patceva, Suzana, Kupe, Lirika, Schneider, Susanne, "How do newly-described diatom species affect biomonitoring? – An example of Gomphonema paratergestinum vs. G. tergestinum" in Abstracts of the 25th International Diatom Symposium (2018):182-182,
https://doi.org/10.3372/ids2018 . .