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Book ; Online: Analyse und Priorisierung der Pfade nicht vorsätzlicher Einbringung und Ausbreitung invasiver gebietsfremder Arten in Deutschland gemäß Verordnung (EU) Nr. 1143/2014

Rabitsch, Wolfgang / Heger, Tina / Jeschke, Jonathan / Saul, Wolf-Christian / Nehring, Stefan

Ergebnisse aus dem F+E-Vorhaben (FKZ 3515 86 0500) = Analysis and prioritisation of pathways of unintentional introduction and spread of invasive alien species in Germany in accordance with Regulation (EU) No 1143/2014 : results of the research and development project (FKZ 3515 86 0500)

(BfN-Skripten ; 490)

2018

Title variant	Analysis and prioritisation of pathways of unintentional introduction and spread of invasive alien species in Germany in accordance with Regulation (EU) No 1143/2014
Institution	Deutschland / Bundesamt für Naturschutz
Author's details	Wolfgang Rabitsch, Tina Heger, Jonathan Jeschke, Wolf-Christian Saul, Stefan Nehring
Series title	BfN-Skripten ; 490 BfN-Skripten / Bundesamt für Naturschutz
Collection	BfN-Skripten / Bundesamt für Naturschutz
Language	German ; English
Size	1 Online-Ressource (103 Seiten), Diagramme, Karten
Publisher	Bundesamt für Naturschutz
Publishing place	Bonn-Bad Godesberg
Publishing country	Germany
Document type	Book ; Online
HBZ-ID	HT019685296
ISBN	9783896242273 ; 389624227X
DOI	10.19217/skr490
Database	ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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Article: Structuring evidence for invasional meltdown: broad support but with biases and gaps

Rennó Braga, Raul / Heger, Tina / Jeschke, Jonathan

Biological invasions, 20(4):923-936

2017

Abstract: Negative interactions have been suggested as a major barrier for species arriving in a new habitat. More recently, positive interactions drew attention from community assembly theory and invasion science. The invasional meltdown hypothesis (IMH) ... ...

Institution	Leibniz-Institut für Gewässerökologie und Binnenfischerei
Abstract	Negative interactions have been suggested as a major barrier for species arriving in a new habitat. More recently, positive interactions drew attention from community assembly theory and invasion science. The invasional meltdown hypothesis (IMH) introduced the idea that positive interactions among non-native species could facilitate one another’s invasion, even increasing their impact upon the native community. Many studies have addressed IMH, but with contrasting results, reflecting various types of evidence on a multitude of scales. Here we use the hierarchy-of-hypotheses (HoH) approach to differentiate key aspects of IMH, organizing and linking empirical studies to sub-hypotheses of IMH. We also assess the level of empirical support for each sub-hypothesis based on the evidence reported in the studies. We identified 150 studies addressing IMH. The majority of studies support IMH, but the evidence comes from studies with different aims and questions. Supporting studies at the community or ecosystem level are currently rare. Evidence is scarce for marine habitats and vertebrates. Few sub-hypotheses are questioned by more than 50% of the evaluated studies, indicating that non-native species do not affect each other’s survival, growth, reproduction, abundance, density or biomass in reciprocal A ↔ B interactions. With the HoH for IMH presented here, we can monitor progress in empirical tests and evidences of IMH. For instance, more tests at the community and ecosystem level are needed, as these are necessary to address the core of this hypothesis.
Keywords	Exotic ; Facilitation ; Mutualism ; Non-indigenous ; Review
Language	English
Document type	Article
Database	Repository for Life Sciences

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Book ; Thesis: Zur Vorhersagbarkeit biologischer Invasionen

Heger, Tina

Entwicklung und Anwendung eines Modells zur Analyse der Invasion gebietsfremder Pflanzen

(Neobiota ; 4)

2004

Author's details	Tina Heger
Series title	Neobiota ; 4
Collection
Keywords	Pflanzen ; Invasion ; Prognose ; Modellierung
Subject	Modellmethode ; Modellierungsmethode ; Modellbildung ; Voraussage ; Vorhersage ; Zukunftsvoraussage ; Zukunftsprognose ; Vorausschätzung ; Prädiktion ; Biologische Invasion ; Flora ; Pflanze ; Landpflanzen
Language	German
Size	II, 197 S., graph. Darst.
Publisher	Institut für Ökologie der TU
Publishing place	Berlin
Publishing country	Germany
Document type	Book ; Thesis
Thesis / German Habilitation thesis	München, Univ., Diss., 2004
HBZ-ID	HT014298998
Database	Catalogue ZB MED Nutrition, Environment, Agriculture

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Shelf mark	Loan status	Location
058/625	available for loan (reading room)	Freihandmagazin (U1)

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Book ; Online: Invasion biology

Jeschke, Jonathan M / Heger, Tina

hypotheses and evidence

(CABI invasives series ; 9)

2018

Abstract: This book, containing 18 chapters, combines the hierarchy-of-hypotheses (HoH) approach with hypothesis networks for invasion biology. This book aims to further develop the HoH approach by inviting critical comments (Part I), apply it to 12 major invasion ...

Author's details	edited by Jonathan M. Jeschke & Tina Heger
Series title	CABI invasives series ; 9
Abstract	This book, containing 18 chapters, combines the hierarchy-of-hypotheses (HoH) approach with hypothesis networks for invasion biology. This book aims to further develop the HoH approach by inviting critical comments (Part I), apply it to 12 major invasion hypotheses (Part II) and explore how it can be expanded to a hierarchically structured hypothesis network (Chapter 7 and Part III). It is important to also check out the companion website that features, for instance, data from the ~1100 studies analysed in Part II of the book. Importantly and as outlined in Chapter 17, this website will be further updated and developed to become a powerful web portal for invasion biology and other research disciplines in the future.
Keywords	Biological invasions/Research.
Language	English
Size	1 online resource
Document type	Book ; Online
ISBN	9781780647654 ; 1780647654 ; 9781780647661 ; 1780647662 ; 1780647646 ; 9781780647647 ; 9781780647647
DOI	10.1079/9781780647647.0000
Database	NAL-Catalogue (AGRICOLA)

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Article: Some reflections on current invasion science and perspectives for an exciting future

Heger, Tina / Jeschke, Jonathan M. / Kollmann, Johannes

NeoBiota. 2021 Sept. 17, v. 68

2021

Abstract: Species spreading beyond their native ranges are important study objects in ecology and environmental sciences and research on biological invasions is thriving. Along with an increase in the number of publications, the research field is experiencing an ... ...

Abstract	Species spreading beyond their native ranges are important study objects in ecology and environmental sciences and research on biological invasions is thriving. Along with an increase in the number of publications, the research field is experiencing an increase in the diversity of methods applied and questions asked. This development has facilitated an upsurge in information on invasions, but it also creates conceptual and practical challenges. To provide more transparency on which kind of research is actually done in the field, the distinction between invasion science, encompassing the full spectrum of studies on biological invasions and the sub-field of invasion biology, studying patterns and mechanisms of species invasions with a focus on biological research questions, can be useful. Although covering a smaller range of topics, invasion biology today still is the driving force in invasion science and we discuss challenges stemming from its embeddedness in the social context. Invasion biology consists of the building blocks ‘theory’, ‘case studies’ and ‘application’, where theory takes the form of conceptual frameworks, major hypotheses and statistical generalisations. Referencing recent work in philosophy of science, we argue that invasion biology, like other biological or ecological disciplines, does not rely on the development of an all-encompassing theory in order to be efficient. We suggest, however, that theory development is nonetheless necessary and propose improvements. Recent advances in data visualisation, machine learning and semantic modelling are providing opportunities for enhancing knowledge management and presentation and we suggest that invasion science should use these to transform its ways of publishing, archiving and visualising research. Along with a stronger focus on studies going beyond purely biological questions, this would facilitate the efficient prevention and management of biological invasions.
Keywords	data visualization ; information management ; philosophy
Language	English
Dates of publication	2021-0917
Size	p. 79-100.
Publishing place	Pensoft Publishers
Document type	Article
ZDB-ID	2628537-X
ISSN	1314-2488 ; 1619-0033
ISSN (online)	1314-2488
ISSN	1619-0033
DOI	10.3897/neobiota.68.68997
Database	NAL-Catalogue (AGRICOLA)

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Article ; Research data: (with research data) Light availability experienced in the field affects ability of following generations to respond to shading in an annual grassland plant

Heger, Tina

journal of ecology. 2016 Sept., v. 104, no. 5

2016

Abstract: For plants competing for light, grasslands represent complex environments. Grassland microhabitats vary in the amount of available light and in the spatial distribution of patches with full sunlight, light shade and deep shade. Plant populations have ... ...

Abstract	For plants competing for light, grasslands represent complex environments. Grassland microhabitats vary in the amount of available light and in the spatial distribution of patches with full sunlight, light shade and deep shade. Plant populations have been shown to adapt to specific competitors and shading conditions, but it is an open question how tightly the responses of populations to different shading situations are linked to the light availability previously experienced in the field. Using maternal families collected in grasslands ranging from open to closed canopies, I tested the effects of no shading, homogeneous and heterogeneous shade created in the glasshouse on trait expression in the annual Erodium cicutarium. Heterogeneous shading was simulated by a patchwork of single and double layers of light filters lowering the R:FR ratio of transmitted light and clear filters simulating gaps. Heterogeneous shading induced a stronger shade avoidance response than homogeneous shading, with larger leaf length, greater vegetative height and larger specific leaf area. Time to first flowering was longer under heterogeneous shading, and plants produced less fruits. Populations differed in their time to first flowering under the shading treatments, and these differences could be traced back to light availability measured in the field. Plants from populations with lower light availability showed a postponed date of first flowering even if they were not shaded. These differences were attributable to plasticity of the maternal families. Across shading treatments, plants from lowâlight environments produced more aboveâground biomass. Synthesis. This study indicates that there is a close linkage between the light availability experienced in the field and the ability of following generations to respond to shading. Low average light availability experienced in the past seems to induce a tradeâoff of vegetative growth against early flowering, providing the following generations with the capacity to overtop neighbours. This capacity is utilized especially if plants experience a mixture of gaps and deep shade.
Keywords	aboveground biomass ; Erodium cicutarium ; filters ; flowering ; fruits ; grasslands ; greenhouses ; leaf area ; leaves ; microhabitats ; shade ; solar radiation ; vegetative growth
Language	English
Dates of publication	2016-09
Size	p. 1432-1440.
Publishing place	John Wiley & Sons, Ltd
Document type	Article ; Research data
Note	JOURNAL ARTICLE
ZDB-ID	3023-5
ISSN	0022-0477 ; 0022-0477
ISSN	0022-0477
DOI	10.1111/1365-2745.12607
Database	NAL-Catalogue (AGRICOLA)

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Article: INAS: Interactive Argumentation Support for the Scientific Domain of Invasion Biology

Heger, Tina / Zarrieß, Sina / Algergawy, Alsayed / Jeschke, Jonathan M. / König-Ries, Birgitta

Research Ideas and Outcomes. 2022 Jan. 25, v. 8

2022

Abstract: Developing a precise argument is not an easy task. In real-world argumentation scenarios, arguments presented in texts (e.g. scientific publications) often constitute the end result of a long and tedious process. A lot of work on computational ... ...

Abstract	Developing a precise argument is not an easy task. In real-world argumentation scenarios, arguments presented in texts (e.g. scientific publications) often constitute the end result of a long and tedious process. A lot of work on computational argumentation has focused on analyzing and aggregating these products of argumentation processes, i.e. argumentative texts. In this project, we adopt a complementary perspective: we aim to develop an argumentation machine that supports users during the argumentation process in a scientific context, enabling them to follow ongoing argumentation in a scientific community and to develop their own arguments. To achieve this ambitious goal, we will focus on a particular phase of the scientific argumentation process, namely the initial phase of claim or hypothesis development. According to argumentation theory, the starting point of an argument is a claim, and also data that serves as a basis for the claim. In scientific argumentation, a carefully developed and thought-through hypothesis (which we see as Toulmin's "claim'' in a scientific context) is often crucial for researchers to be able to conduct a successful study and, in the end, present a new, high-quality finding or argument. Thus, an initial hypothesis needs to be specific enough that a researcher can test it based on data, but, at the same time, it should also relate to previous general claims made in the community. We investigate how argumentation machines can (i) represent concrete and more abstract knowledge on hypotheses and their underlying concepts, (ii) model the process of hypothesis refinement, including data as a basis of refinement, and (iii) interactively support a user in developing her own hypothesis based on these resources. This project will combine methods from different disciplines: natural language processing, knowledge representation and semantic web, philosophy of science and -- as an example for a scientific domain -- invasion biology. Our starting point is an existing resource in invasion biology that organizes and relates core hypotheses in the field and associates them to meta-data for more than 1000 scientific publications, which was developed over the course of several years based on manual analysis. This network, however, is currently static (i.e. needs substantial manual curation to be extended to incorporate new claims) and, moreover, is not easily accessible for users who miss specific background and domain knowledge in invasion biology. Our goal is to develop (i) a semantic model for representing knowledge on concepts and hypotheses, such that also non-expert users can use the network; (ii) a tool that automatically computes links from publication abstracts (and data) to these hypotheses; and (iii) an interactive system that supports users in refining their initial, potentially underdeveloped hypothesis.
Keywords	metadata ; models ; philosophy ; research ; researchers
Language	English
Dates of publication	2022-0125
Publishing place	Pensoft Publishers
Document type	Article
ZDB-ID	2833254-4
ISSN	2367-7163
ISSN	2367-7163
DOI	10.3897/rio.8.e80457
Database	NAL-Catalogue (AGRICOLA)

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Article: Biodiversity maintains soil multifunctionality and soil organic carbon in novel urban ecosystems

Schittko, Conrad / Onandia, Gabriela / Bernard‐Verdier, Maud / Heger, Tina / Jeschke, Jonathan M. / Kowarik, Ingo / Maaß, Stefanie / Joshi, Jasmin

journal of ecology. 2022 Apr., v. 110, no. 4

2022

Abstract: Biodiversity in urban ecosystems has the potential to increase ecosystem functions and support a suite of services valued by society, including services provided by soils. Specifically, the sequestration of carbon in soils has often been advocated as a ... ...

Abstract	Biodiversity in urban ecosystems has the potential to increase ecosystem functions and support a suite of services valued by society, including services provided by soils. Specifically, the sequestration of carbon in soils has often been advocated as a solution to mitigate the steady increase in CO₂ concentration in the atmosphere as a key driver of climate change. However, urban ecosystems are also characterized by an often high level of ecological novelty due to profound human‐mediated changes, such as the presence of high numbers of non‐native species, impervious surfaces or other disturbances. Yet it is poorly understood whether and how biodiversity affects ecosystem functioning and services of urban soils under these novel conditions. In this study, we assessed the influence of above‐ and below‐ground diversity, as well as urbanization and plant invasions, on multifunctionality and organic carbon stocks of soils in non‐manipulated grasslands along an urbanization gradient in Berlin, Germany. We focused on plant diversity (measured as species richness and functional trait diversity) and, in addition, on soil organism diversity as a potential mediator for the relationship of plant species diversity and ecosystem functioning. Our results showed positive effects of plant diversity on soil multifunctionality and soil organic carbon stocks along the entire gradient. Structural equation models revealed that plant diversity enhanced soil multifunctionality and soil organic carbon by increasing the diversity of below‐ground organisms. These positive effects of plant diversity on soil multifunctionality and soil fauna were not restricted to native plant species only, but were also exerted by non‐native species, although to a lesser degree. Synthesis. We conclude that enhancing diversity in plants and soil fauna of urban grasslands can increase the multifunctionality of urban soils and also add to their often underestimated but very valuable role in mitigating effects of climate change.
Keywords	carbon dioxide ; climate change ; ecosystems ; equations ; indigenous species ; introduced species ; soil fauna ; soil organic carbon ; species richness ; urbanization ; Germany
Language	English
Dates of publication	2022-04
Size	p. 916-934.
Publishing place	John Wiley & Sons, Ltd
Document type	Article
Note	JOURNAL ARTICLE
ZDB-ID	3023-5
ISSN	0022-0477
ISSN	0022-0477
DOI	10.1111/1365-2745.13852
Database	NAL-Catalogue (AGRICOLA)

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Article: Towards an open, zoomable atlas for invasion science and beyond

Jeschke, Jonathan M. / Heger, Tina / Kraker, Peter / Schramm, Maxi / Kittel, Christopher / Mietchen, Daniel

NeoBiota. 2021 Aug. 18, v. 68

2021

Abstract: Biological invasions are on the rise, and their global impacts on ecosystems, economies and human health are a major challenge. Invasion science is critical to mitigate invader impacts, yet due to the strong increase of data and information in this area, ...

Abstract	Biological invasions are on the rise, and their global impacts on ecosystems, economies and human health are a major challenge. Invasion science is critical to mitigate invader impacts, yet due to the strong increase of data and information in this area, it has become difficult to acquire and maintain an overview of the field. As a result, existing evidence is often not found, knowledge is too rarely transferred to practice, and research is sometimes conducted in pursuit of dead ends. We propose to address these challenges by developing an interactive atlas of invasion science that can be extended to other disciplines in the future. This online portal, which we aim to create in the course of the project described here, will be an evolving knowledge resource and open for anyone to use, including researchers, citizen scientists, practitioners and policy makers. Users will be able to zoom into the major research questions and hypotheses of invasion science, which are connected to the relevant studies published in the field and, if available, the underlying raw data. The portal will apply cutting-edge visualization techniques, artificial intelligence and novel methods for knowledge synthesis.
Keywords	artificial intelligence ; human health ; issues and policy
Language	English
Dates of publication	2021-0818
Size	p. 5-18.
Publishing place	Pensoft Publishers
Document type	Article
ZDB-ID	2628537-X
ISSN	1314-2488 ; 1619-0033
ISSN (online)	1314-2488
ISSN	1619-0033
DOI	10.3897/neobiota.68.66685
Database	NAL-Catalogue (AGRICOLA)

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Article: Differentiation in native as well as introduced ranges: germination reflects mean and variance in cover of surrounding vegetation.

Heger, Tina / Nikles, Gabriele / Jacobs, Brooke S

AoB PLANTS

2018 Volume 10, Issue 1, Page(s) ply009

Abstract: Germination, a crucial phase in the life cycle of a plant, can be significantly influenced by competition and facilitation. The aim of this study was to test whether differences in cover of surrounding vegetation can lead to population differentiation in ...

Abstract	Germination, a crucial phase in the life cycle of a plant, can be significantly influenced by competition and facilitation. The aim of this study was to test whether differences in cover of surrounding vegetation can lead to population differentiation in germination behaviour of an annual grassland species, and if so, whether such a differentiation can be found in the native as well as in the introduced range. We used maternal progeny of
Language	English
Publishing date	2018-02-03
Publishing country	England
Document type	Journal Article
ISSN	2041-2851
ISSN	2041-2851
DOI	10.1093/aobpla/ply009
Database	MEDical Literature Analysis and Retrieval System OnLINE

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