Lukas Schröer
M. Sc.
Publikationen
2025
Stratemann L; Schröer L; Bach A; Toschki A; Oellers J; Roß-Nickoll M
BioDivSoil – Bodenbiodiversität im Fokus: Diversitätsmuster und Methodenevaluation zur Erfassung und Bewertung der Bodenbiodiversität in der Agrarlandschaft Forschungsbericht
Deutschland / Bundesamt für Naturschutz, BfN-Schriften 746, 2025.
@techreport{Stratemann2025,
title = {BioDivSoil – Bodenbiodiversität im Fokus: Diversitätsmuster und Methodenevaluation zur Erfassung und Bewertung der Bodenbiodiversität in der Agrarlandschaft},
author = {Lucas Stratemann and Lukas Schröer and Alexander Bach and Andreas Toschki and Johanna Oellers and Martina Roß-Nickoll},
editor = {Bundesamt für Naturschutz},
doi = {10.19217/skr746},
year = {2025},
date = {2025-04-01},
urldate = {2025-04-01},
issue = {BfN-Schriften 746},
institution = {Deutschland / Bundesamt für Naturschutz, BfN-Schriften 746,},
abstract = {The identification of biodiversity patterns in agricultural landscapes is of crucial importance for the assessment of ecological status and the development of sustainable management strategies. As part of the BioDivSoil project, soil biodiversity under different forms of land use was investigated using established and molecular biological methods. The aim was to identify indicators for the promotion and evaluation of soil biocenoses.
The soil fauna was recorded at a total of 45 sites and identified to species level using morpho-logical and molecular biological approaches. Collembola, Oribatida and Lumbricidae were an-alyzed as representatives of the endogean communities and Carabidae and Araneae as repre-sentatives of the epigean predators. At the molecular biological level, eDNA analyses of soil samples and DNA metabarcoding of soil trap contents were used.
The data collected in the first year of the study showed clear differences between different forms of land use. Tipping points were identified, which manifested themselves in the disap-pearance of specialized species and the dominance of generalist species on intensively used sites, i.e. intensive grassland and arable land. This pattern was identified for both endogean and epigean animal groups. While Collembola and Oribatida showed a strong decline in the number of species and individuals, this was not the case for Carabidae and Araneae. The mo-lecular-biologically determined bycatches from pitfall traps also showed differences between the land-use types in terms of species composition. Endogean biocenoses identified by eDNA analyses could only be distinguished between field margins and intensive sites.
Both the DNA-based methods and the Carabidae and Araneae showed significantly higher numbers of species in field margins than on arable land, which indicates the enormous im-portance of structural diversity in the agricultural landscape. No significant differences were found between arable land and intensive grassland. The Lumbricidae hardly differed between the three forms of land use.
In the second year of research, organically and conventionally farmed arable land and young fallow fields were compared in terms of their biodiversity. In this part of the project, Carabidae and Araneae were morphologically determined and eDNA analyses from soil samples and DNA metabarcoding of bycatches were carried out. No significant differences were found between organically and conventionally farmed arable land. However, the conventionally farmed ara-ble fields showed a significantly lower number of species and functional richness compared to the fallow fields. The eDNA analysis showed a significantly higher number of species for endo-gean groups on organic plots compared to fallow fields. These results indicate that epigean communities recover faster and respond more quickly to changes in environmental factors than endogean communities.
The BioDivSoil project provides important insights into the assessment of biodiversity in the agricultural landscape and at the same time highlights the need for research and action for sustainable soil management in agriculture.},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
The identification of biodiversity patterns in agricultural landscapes is of crucial importance for the assessment of ecological status and the development of sustainable management strategies. As part of the BioDivSoil project, soil biodiversity under different forms of land use was investigated using established and molecular biological methods. The aim was to identify indicators for the promotion and evaluation of soil biocenoses.
The soil fauna was recorded at a total of 45 sites and identified to species level using morpho-logical and molecular biological approaches. Collembola, Oribatida and Lumbricidae were an-alyzed as representatives of the endogean communities and Carabidae and Araneae as repre-sentatives of the epigean predators. At the molecular biological level, eDNA analyses of soil samples and DNA metabarcoding of soil trap contents were used.
The data collected in the first year of the study showed clear differences between different forms of land use. Tipping points were identified, which manifested themselves in the disap-pearance of specialized species and the dominance of generalist species on intensively used sites, i.e. intensive grassland and arable land. This pattern was identified for both endogean and epigean animal groups. While Collembola and Oribatida showed a strong decline in the number of species and individuals, this was not the case for Carabidae and Araneae. The mo-lecular-biologically determined bycatches from pitfall traps also showed differences between the land-use types in terms of species composition. Endogean biocenoses identified by eDNA analyses could only be distinguished between field margins and intensive sites.
Both the DNA-based methods and the Carabidae and Araneae showed significantly higher numbers of species in field margins than on arable land, which indicates the enormous im-portance of structural diversity in the agricultural landscape. No significant differences were found between arable land and intensive grassland. The Lumbricidae hardly differed between the three forms of land use.
In the second year of research, organically and conventionally farmed arable land and young fallow fields were compared in terms of their biodiversity. In this part of the project, Carabidae and Araneae were morphologically determined and eDNA analyses from soil samples and DNA metabarcoding of bycatches were carried out. No significant differences were found between organically and conventionally farmed arable land. However, the conventionally farmed ara-ble fields showed a significantly lower number of species and functional richness compared to the fallow fields. The eDNA analysis showed a significantly higher number of species for endo-gean groups on organic plots compared to fallow fields. These results indicate that epigean communities recover faster and respond more quickly to changes in environmental factors than endogean communities.
The BioDivSoil project provides important insights into the assessment of biodiversity in the agricultural landscape and at the same time highlights the need for research and action for sustainable soil management in agriculture.
The soil fauna was recorded at a total of 45 sites and identified to species level using morpho-logical and molecular biological approaches. Collembola, Oribatida and Lumbricidae were an-alyzed as representatives of the endogean communities and Carabidae and Araneae as repre-sentatives of the epigean predators. At the molecular biological level, eDNA analyses of soil samples and DNA metabarcoding of soil trap contents were used.
The data collected in the first year of the study showed clear differences between different forms of land use. Tipping points were identified, which manifested themselves in the disap-pearance of specialized species and the dominance of generalist species on intensively used sites, i.e. intensive grassland and arable land. This pattern was identified for both endogean and epigean animal groups. While Collembola and Oribatida showed a strong decline in the number of species and individuals, this was not the case for Carabidae and Araneae. The mo-lecular-biologically determined bycatches from pitfall traps also showed differences between the land-use types in terms of species composition. Endogean biocenoses identified by eDNA analyses could only be distinguished between field margins and intensive sites.
Both the DNA-based methods and the Carabidae and Araneae showed significantly higher numbers of species in field margins than on arable land, which indicates the enormous im-portance of structural diversity in the agricultural landscape. No significant differences were found between arable land and intensive grassland. The Lumbricidae hardly differed between the three forms of land use.
In the second year of research, organically and conventionally farmed arable land and young fallow fields were compared in terms of their biodiversity. In this part of the project, Carabidae and Araneae were morphologically determined and eDNA analyses from soil samples and DNA metabarcoding of bycatches were carried out. No significant differences were found between organically and conventionally farmed arable land. However, the conventionally farmed ara-ble fields showed a significantly lower number of species and functional richness compared to the fallow fields. The eDNA analysis showed a significantly higher number of species for endo-gean groups on organic plots compared to fallow fields. These results indicate that epigean communities recover faster and respond more quickly to changes in environmental factors than endogean communities.
The BioDivSoil project provides important insights into the assessment of biodiversity in the agricultural landscape and at the same time highlights the need for research and action for sustainable soil management in agriculture.
2024
Schröer L; Bach A; Oellers J; Nabel M; Kirse A; Stratemann L; Toschki A; Roß-Nickoll M
In: Natur und Landschaft, Bd. 99, Ausg. 09/10, S. 470–479, 2024.
@article{Schröer2024,
title = {Hürden und Chancen der Integration DNA-basierter Methoden für ein Bodenbiodiversitätsmonitoring in Agrarlebensräumen},
author = {Lukas Schröer and Alexander Bach and Johanna Oellers and Moritz Nabel and Ameli Kirse and Lucas Stratemann and Andreas Toschki and Martina Roß-Nickoll},
doi = {10.19217/NuL2024-09-06},
year = {2024},
date = {2024-10-01},
urldate = {2024-10-01},
journal = {Natur und Landschaft},
volume = {99},
issue = {09/10},
pages = {470--479},
abstract = {Trotz steigender Anerkennung der Bedeutung von Bodenorganismen und deren Diversität bestehen auch heute noch große Wissenslücken hinsichtlich der im und auf dem Boden lebenden Organismen. Auf dieser Grundlage entstand die Idee für das BioDivSoil-Projekt, in dem in einem einheitlichen Studiendesign auf drei verschiedenen Standorttypen (Acker, Feldrain, Grünland) Vergleiche zwischen der morphologischen Bestimmung von Organismen (Laufkäfer - Carabidae, Spinnen - Araneae, Springschwänze - Collembola, Hornmilben - Oribatida, Regenwürmer - Lumbricidae) und verschiedenen molekularbiologischen Methoden zur Artbestimmung angestellt werden. So soll die Eignung der molekularbiologischen Methoden als Werkzeug in einem ökologischen Monitoring terrestrischer Lebensräume überprüft werden. Erste Vergleiche der verschiedenen Methoden hinsichtlich der gefundenen Artenzahlen der Gruppen Lumbriciden, Oribatiden und Collembolen zeigen, dass die molekularbiologischen Methoden durchaus Potenzial zur Anwendung innerhalb eines ökologischen Monitorings aufweisen. Dennoch existieren noch große Einschränkungen aufgrund lückenhafter Gendatenbanken, bisher nicht standardisierter Verfahren und der Frage nach der Validierbarkeit der Ergebnisse. Diese Hindernisse müssen auf dem Weg zu einer einheitlichen Anwendung der Methoden im Rahmen eines ökologischen Monitorings von Böden zwingend beseitigt werden.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Trotz steigender Anerkennung der Bedeutung von Bodenorganismen und deren Diversität bestehen auch heute noch große Wissenslücken hinsichtlich der im und auf dem Boden lebenden Organismen. Auf dieser Grundlage entstand die Idee für das BioDivSoil-Projekt, in dem in einem einheitlichen Studiendesign auf drei verschiedenen Standorttypen (Acker, Feldrain, Grünland) Vergleiche zwischen der morphologischen Bestimmung von Organismen (Laufkäfer - Carabidae, Spinnen - Araneae, Springschwänze - Collembola, Hornmilben - Oribatida, Regenwürmer - Lumbricidae) und verschiedenen molekularbiologischen Methoden zur Artbestimmung angestellt werden. So soll die Eignung der molekularbiologischen Methoden als Werkzeug in einem ökologischen Monitoring terrestrischer Lebensräume überprüft werden. Erste Vergleiche der verschiedenen Methoden hinsichtlich der gefundenen Artenzahlen der Gruppen Lumbriciden, Oribatiden und Collembolen zeigen, dass die molekularbiologischen Methoden durchaus Potenzial zur Anwendung innerhalb eines ökologischen Monitorings aufweisen. Dennoch existieren noch große Einschränkungen aufgrund lückenhafter Gendatenbanken, bisher nicht standardisierter Verfahren und der Frage nach der Validierbarkeit der Ergebnisse. Diese Hindernisse müssen auf dem Weg zu einer einheitlichen Anwendung der Methoden im Rahmen eines ökologischen Monitorings von Böden zwingend beseitigt werden.
2022
Johann S; Weichert F G; Schröer L; Stratemann L; Kämpfer C; Seiler T; Heger S; Töpel A; Sassmann T; Pich A; Jakob F; Schwaneberg U; Stoffels P; Philipp M; Terfrüchte M; Loeschcke A; Schipper K; Feldbrügge M; Ihling N; Büchs J; Bator I; Tiso T; Blank L M; Roß-Nickoll M; Hollert H
In: Journal of Hazardous Materials, Bd. 426, 2022, ISSN: 0304-3894.
@article{Johann2022,
title = {A plea for the integration of Green Toxicology in sustainable bioeconomy strategies – Biosurfactants and microgel-based pesticide release systems as examples},
author = {Sarah Johann and Fabian G. Weichert and Lukas Schröer and Lucas Stratemann and Christoph Kämpfer and Thomas-Benjamin Seiler and Sebastian Heger and Alexander Töpel and Tim Sassmann and Andrij Pich and Felix Jakob and Ulrich Schwaneberg and Peter Stoffels and Magnus Philipp and Marius Terfrüchte and Anita Loeschcke and Kerstin Schipper and Michael Feldbrügge and Nina Ihling and Jochen Büchs and Isabel Bator and Till Tiso and Lars M. Blank and Martina Roß-Nickoll and Henner Hollert},
doi = {10.1016/j.jhazmat.2021.127800},
issn = {0304-3894},
year = {2022},
date = {2022-03-00},
urldate = {2022-03-00},
journal = {Journal of Hazardous Materials},
volume = {426},
publisher = {Elsevier BV},
abstract = {A key aspect of the transformation of the economic sector towards a sustainable bioeconomy is the development of environmentally friendly alternatives for hitherto used chemicals, which have negative impacts on environmental health. However, the implementation of an ecotoxicological hazard assessment at early steps of product development to elaborate the most promising candidates of lowest harm is scarce in industry practice. The present article introduces the interdisciplinary proof-of-concept project GreenToxiConomy, which shows the successful application of a Green Toxicology strategy for biosurfactants and a novel microgel-based pesticide release system. Both groups are promising candidates for industrial and agricultural applications and the ecotoxicological characterization is yet missing important information. An iterative substance- and application-oriented bioassay battery for acute and mechanism-specific toxicity within aquatic and terrestrial model species is introduced for both potentially hazardous materials getting into contact with humans and ending up in the environment. By applying in silico QSAR-based models on genotoxicity, endocrine disruption, skin sensitization and acute toxicity to algae, daphnids and fish, individual biosurfactants resulted in deviating toxicity, suggesting a pre-ranking of the compounds. Experimental toxicity assessment will further complement the predicted toxicity to elaborate the most promising candidates in an efficient pre-screening of new substances.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A key aspect of the transformation of the economic sector towards a sustainable bioeconomy is the development of environmentally friendly alternatives for hitherto used chemicals, which have negative impacts on environmental health. However, the implementation of an ecotoxicological hazard assessment at early steps of product development to elaborate the most promising candidates of lowest harm is scarce in industry practice. The present article introduces the interdisciplinary proof-of-concept project GreenToxiConomy, which shows the successful application of a Green Toxicology strategy for biosurfactants and a novel microgel-based pesticide release system. Both groups are promising candidates for industrial and agricultural applications and the ecotoxicological characterization is yet missing important information. An iterative substance- and application-oriented bioassay battery for acute and mechanism-specific toxicity within aquatic and terrestrial model species is introduced for both potentially hazardous materials getting into contact with humans and ending up in the environment. By applying in silico QSAR-based models on genotoxicity, endocrine disruption, skin sensitization and acute toxicity to algae, daphnids and fish, individual biosurfactants resulted in deviating toxicity, suggesting a pre-ranking of the compounds. Experimental toxicity assessment will further complement the predicted toxicity to elaborate the most promising candidates in an efficient pre-screening of new substances.