Kristjan Oopkaup

1.5k citations

20 papers · 1.2k indexed · h-index 14

Pollution top 2%
Ecology top 5%
Industrial and Manufacturing Engineering top 2%
Molecular Biology
Microbiology top 5%

Co-authors: Jaak Truu Marika Truu Hiie Nõlvak Ülo Mander Jens‐Konrad Preem Teele Ligi Reet Mändar William J. Mitsch
Topics: Microbial Community Ecology and Physiology (6 papers)Wastewater Treatment and Nitrogen Removal (6 papers)Peatlands and Wetlands Ecology (4 papers)
Cited by: Pollution Industrial and Manufacturing Engineering Microbiology
Journals: The Science of The Total Environment Water Research Journal of Hazardous Materials
Partner nations: Estonia Sweden United States

In The Last Decade

Kristjan Oopkaup

20 papers receiving 1.2k citations

Peers

Countries citing papers authored by Kristjan Oopkaup

Since Specialization

Citations

This map shows the geographic impact of Kristjan Oopkaup's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Kristjan Oopkaup with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kristjan Oopkaup more than expected).

Fields of papers citing papers by Kristjan Oopkaup

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kristjan Oopkaup. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Kristjan Oopkaup. The network helps show where Kristjan Oopkaup may publish in the future.

Co-authorship network of co-authors of Kristjan Oopkaup

This figure shows the co-authorship network connecting the top 25 collaborators of Kristjan Oopkaup. A scholar is included among the top collaborators of Kristjan Oopkaup based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Kristjan Oopkaup. Kristjan Oopkaup is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Impact of synthetic silver nanoparticles on the biofilm microbial communities and wastewater treatment efficiency in experimental hybrid filter system treating municipal wastewater 2022 ·Journal of Hazardous Materials ·Marika Truu,Teele Ligi,Hiie Nõlvak,(unknown),(unknown),(unknown),Kristjan Oopkaup,Kaja Kasemets,Margit Kõiv‐Vainik,Kuno Kasak,Jaak Truu	7
2	Long‐term inorganic nitrogen application changes the ammonia‐oxidizing archaeal community composition in paddy soils 2021 ·European Journal of Soil Science ·Sandipan Samaddar,Jaak Truu,Poulami Chatterjee,Kristjan Oopkaup,Marika Truu,Kiyoon Kim,(unknown),Radomir Schmidt,Aritra Roy Choudhury,Jeongyun Choi,Tongmin Sa	7
3	Soil Bacterial and Archaeal Communities and Their Potential to Perform N-Cycling Processes in Soils of Boreal Forests Growing on Well-Drained Peat 2020 ·Frontiers in Microbiology ·Marika Truu,Hiie Nõlvak,Ivika Ostonen,Kristjan Oopkaup,Martin Maddison,Teele Ligi,Mikk Espenberg,Veiko Uri,Ülo Mander,Jaak Truu	32
4	Impact of polyols on Oral microbiome of Estonian schoolchildren 2019 ·BMC Oral Health ·Jelena Štšepetova,Jaak Truu,(unknown),(unknown),Mare Saag,Jana Olak,Hiie Nõlvak,Jens‐Konrad Preem,Kristjan Oopkaup,Kaarel Krjutškov,Eino Honkala,Sisko Honkala,Kauko K. Mäkinen,Pirkko‐Liisa Mäkinen,Tero Vahlberg,Joan Vermeiren,Douwina Bosscher,Peter de Cock,Reet Mändar	25
5	Reduction of antibiotic resistome and integron-integrase genes in laboratory-scale photobioreactors treating municipal wastewater 2018 ·Water Research ·Hiie Nõlvak,Marika Truu,Kristjan Oopkaup,(unknown),(unknown),Emma Nehrenheim,Jaak Truu	29
6	Bacterial community activity and dynamics in the biofilm of an experimental hybrid wetland system treating greywater 2018 ·Environmental Science and Pollution Research ·Marika Truu,Kristjan Oopkaup,(unknown),Margit Kõiv‐Vainik,Hiie Nõlvak,Jaak Truu	17
7	Biochar enhances plant growth and nutrient removal in horizontal subsurface flow constructed wetlands 2018 ·The Science of The Total Environment ·Kuno Kasak,Jaak Truu,Ivika Ostonen,(unknown),Kristjan Oopkaup,Päärn Paiste,Margit Kõiv‐Vainik,Ülo Mander,Marika Truu	134
8	Differences in microbial community structure and nitrogen cycling in natural and drained tropical peatland soils 2018 ·Scientific Reports ·Mikk Espenberg,Marika Truu,Ülo Mander,Kuno Kasak,Hiie Nõlvak,Teele Ligi,Kristjan Oopkaup,Martin Maddison,Jaak Truu	76
9	The bacterial community structure and functional profile in the heavy metal contaminated paddy soils, surrounding a nonferrous smelter in South Korea 2018 ·Ecology and Evolution ·Sherlyn Tipayno,Jaak Truu,Sandipan Samaddar,Marika Truu,Jens‐Konrad Preem,Kristjan Oopkaup,Mikk Espenberg,Poulami Chatterjee,Yeongyeong Kang,Kiyoon Kim,Tongmin Sa	86
10	Seminal microbiome in men with and without prostatitis 2017 ·International Journal of Urology ·Reet Mändar,Margus Punab,Paul Korrovits,Silver Türk,Kristo Ausmees,(unknown),Jens‐Konrad Preem,Kristjan Oopkaup,Andres Salumets,Jaak Truu	109
11	Dynamics of Bacterial Community Abundance and Structure in Horizontal Subsurface Flow Wetland Mesocosms Treating Municipal Wastewater 2016 ·Water ·Kristjan Oopkaup,Marika Truu,Hiie Nõlvak,Teele Ligi,Jens‐Konrad Preem,Ülo Mander,Jaak Truu	12
12	Complementary seminovaginal microbiome in couples 2015 ·Research in Microbiology ·Reet Mändar,Margus Punab,(unknown),(unknown),Riinu Kiiker,Paul Korrovits,Andres Metspalu,Kaarel Krjutškov,Hiie Nõlvak,Jens‐Konrad Preem,Kristjan Oopkaup,Andres Salumets,Jaak Truu	165
13	Biotransformation of pink water TNT on the surface of a low-cost adsorbent pine bark 2015 ·Biodegradation ·(unknown),Hiie Nõlvak,Monica Odlare,Jaak Truu,Marika Truu,Kristjan Oopkaup,Emma Nehrenheim	12
14	Highly Diverse Microbiota in Dental Root Canals in Cases of Apical Periodontitis (Data of Illumina Sequencing) 2014 ·Journal of Endodontics ·(unknown),(unknown),Mare Saag,Jens‐Konrad Preem,Kristjan Oopkaup,Jaak Truu,Reet Mändar	68
15	The genetic potential of N2 emission via denitrification and ANAMMOX from the soils and sediments of a created riverine treatment wetland complex 2014 ·Ecological Engineering ·Teele Ligi,Marika Truu,Kristjan Oopkaup,Hiie Nõlvak,Ülo Mander,William J. Mitsch,Jaak Truu	46
16	Effect of pine bark on the biotransformation of trinitrotoluene and on the bacterial community structure in a batch experiment 2014 ·Environmental Technology ·(unknown),Hiie Nõlvak,Emma Nehrenheim,Jaak Truu,Monica Odlare,Kristjan Oopkaup,Marika Truu	3
17	Characterization of the bacterioplankton community and its antibiotic resistance genes in the Baltic Sea 2013 ·Biotechnology and Applied Biochemistry ·(unknown),Hiie Nõlvak,Kristjan Oopkaup,Marika Truu,Jens‐Konrad Preem,Ain Heinaru,Jaak Truu	11
18	Dynamics of antibiotic resistance genes and their relationships with system treatment efficiency in a horizontal subsurface flow constructed wetland 2013 ·The Science of The Total Environment ·Hiie Nõlvak,Marika Truu,(unknown),Kristjan Oopkaup,(unknown),Ants Kaasik,Ülo Mander,Jaak Truu	95
19	Characterization of bacterial communities in soil and sediment of a created riverine wetland complex using high-throughput 16S rRNA amplicon sequencing 2013 ·Ecological Engineering ·Teele Ligi,Kristjan Oopkaup,Marika Truu,Jens‐Konrad Preem,Hiie Nõlvak,William J. Mitsch,Ülo Mander,Jaak Truu	172
20	Bacterial community structure and its relationship to soil physico-chemical characteristics in alder stands with different management histories 2012 ·Ecological Engineering ·Jens‐Konrad Preem,Jaak Truu,Marika Truu,Ülo Mander,Kristjan Oopkaup,Krista Lõhmus,Heljä‐Sisko Helmisaari,Veiko Uri,Martin Zobel	64

About Kristjan Oopkaup

Kristjan Oopkaup is a scholar working on Pollution, Periodontics and Ecology, having authored 20 papers that have together received 1.2k indexed citations. Recurring topics across this work include Microbial Community Ecology and Physiology (6 papers), Wastewater Treatment and Nitrogen Removal (6 papers) and Peatlands and Wetlands Ecology (4 papers). The work is most often cited by research in Pollution (378 citations), Industrial and Manufacturing Engineering (261 citations) and Microbiology (125 citations). Kristjan Oopkaup has collaborated with scholars based in Estonia, Sweden and United States. Frequent co-authors include Jaak Truu, Marika Truu, Hiie Nõlvak, Ülo Mander, Jens‐Konrad Preem, Teele Ligi, Reet Mändar, William J. Mitsch, Margus Punab and Andres Salumets. Their work appears in journals such as The Science of The Total Environment, Water Research and Journal of Hazardous Materials.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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