12 results on '"Silke Lütt"'
Search Results
2. Front Cover
- Author
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Helge Bruelheide, Florian Jansen, Ute Jandt, Markus Bernhardt‐Römermann, Aletta Bonn, Diana Bowler, Jürgen Dengler, David Eichenberg, Volker Grescho, David Harter, Matthias Jugelt, Simon Kellner, Martin Ludwig, Karsten Wesche, and Silke Lütt
- Subjects
Ecology, Evolution, Behavior and Systematics - Published
- 2020
3. Safeguarding the rare woodland species Gagea spathacea:Understanding habitat requirements is not sufficient
- Author
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Alexandra Erfmeier, Marcus Schmidt, Werner Härdtle, Tanja Hemke, Volker Arnold, Andreas Fichtner, Diethart Matthies, Goddert von Oheimb, Silke Lütt, Bettina Ohse, Doris Jansen, and Knut Sturm
- Subjects
0106 biological sciences ,Abiotic component ,education.field_of_study ,Ecology ,Population ,Biodiversity ,Temperate forest ,Plant Science ,Understory ,Woodland ,Biology ,010603 evolutionary biology ,01 natural sciences ,Deciduous ,Ecosystems Research ,ash dieback ,habitat continuity ,education ,dispersal ,herbaceous layer ,Flower formation ,Ecology, Evolution, Behavior and Systematics ,biodiversity - Abstract
A large proportion of temperate forest plant diversity is found in the herb layer.However, for many of its species, little is known about their autecology, whichmakes it difficult to assess potential threats and efficiently safeguard the diversity of understorey herbaceous communities. This also applies to Gageaspathacea (Liliaceae), a globally rare spring geophyte, which mainly occurs indeciduous forests of northern Central Europe. We investigated the causal relationships between population characteristics of G. spathacea and abiotic siteconditions across different forest communities in the center of its distributionalrange. Leaf length (a surrogate of the species' vegetative propagation) was positively related to soil moisture and soil nitrogen. Consequently, mean leaflength was highest in moist forest communities of the alliance Alno-Ulmion.Moreover, mean variability in leaf length was lowest in those forests, indicatinga higher and more stable vegetative propagation via bulbils. We found no support for a significant relationship between leaf length and leaf density orbetween leaf length and flower formation. Population density varied stronglyamong forest sites, but was not related to soil moisture and hardly influenced by soil nitrogen. Our results suggest that soil water and nutrient supply play avital role in determining the species' vegetative propagation, whereas the duration of habitat continuity is most likely an important determinant of population size and density. Conservation strategies therefore require a betterunderstanding of the complex interrelationships between abiotic site conditionsand the historical context-dependency of habitats. A large proportion of temperate forest plant diversity is found in the herb layer. However, for many of its species, little is known about their autecology, which makes it difficult to assess potential threats and efficiently safeguard the diversity of understorey herbaceous communities. This also applies to Gagea spathacea (Liliaceae), a globally rare spring geophyte, which mainly occurs in deciduous forests of northern Central Europe. We investigated the causal relationships between population characteristics of G. spathacea and abiotic site conditions across different forest communities in the center of its distributional range. Leaf length (a surrogate of the species' vegetative propagation) was positively related to soil moisture and soil nitrogen. Consequently, mean leaf length was highest in moist forest communities of the alliance Alno‐Ulmion. Moreover, mean variability in leaf length was lowest in those forests, indicating a higher and more stable vegetative propagation via bulbils. We found no support for a significant relationship between leaf length and leaf density or between leaf length and flower formation. Population density varied strongly among forest sites, but was not related to soil moisture and hardly influenced by soil nitrogen. Our results suggest that soil water and nutrient supply play a vital role in determining the species' vegetative propagation, whereas the duration of habitat continuity is most likely an important determinant of population size and density. Conservation strategies therefore require a better understanding of the complex interrelationships between abiotic site conditions and the historical context‐dependency of habitats.
- Published
- 2020
4. Using incomplete floristic monitoring data from habitat mapping programmes to detect species trends
- Author
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Helge Bruelheide, Florian Jansen, Aletta Bonn, Ute Jandt, Diana E. Bowler, Silke Lütt, Jürgen Dengler, David Eichenberg, Volker Grescho, Markus Bernhardt-Römermann, David E. V. Harter, Karsten Wesche, Simon Kellner, Matthias Jugelt, and Martin Ludwig
- Subjects
Geography ,Habitat ,Ecology ,Monitoring data ,333.7: Landflächen, Naturerholungsgebiete ,Plant species ,Ecology, Evolution, Behavior and Systematics ,Floristics - Abstract
Aim: The loss of biodiversity has raised serious concerns about the entailing losses of ecosystem services. Here, we explore the potential of repeated habitat mapping data to identify floristic changes over time. Using one German federal state as a case study, we assessed floristic changes between the 1980s and 2010s. These habitat data have great potential for analysis because of their high spatial coverage while also posing methodological challenges such as incomplete observation data. We developed a modelling approach that accounts for incomplete observations and explored the ability to detect temporal trends. Location: The Federal State of Schleswig‐Holstein (Germany) Methods: We compiled plant species lists from the earliest (1980s) and most recent (2010s) habitat mapping survey and aligned differing habitat definitions across mapping campaigns. A total of 5,503 mapped polygons, each with a list of species records, intersected the two surveys. We accounted for underrecorded species by assigning occurrence probabilities, based on species co‐occurrence information across all surveys, using Beals' index and tested the robustness of this approach by simulation experiments. For those species with significant increases and decreases in occurrence probability, we linked these trends to the species' functional characteristics. Results: We found a systematic loss of species that are moderately threatened. Species that indicate low nitrogen supply and high soil moisture declined, suggesting a shift towards a more eutrophic and drier landscape. Importantly, assessing specific plant traits associated with losses, we also detected a decrease in species with reddish and blueish flowers and species providing nectar, pointing to a decrease of insect‐pollinated taxa. Main conclusions: The identified changes raise concerns that plant biodiversity has fundamentally changed over the last three decades, with concomitant consequences for ecosystem services, especially pollination. Given the general lack of historical standardized data, our approach for trend analyses using incomplete observation data may be widely applicable to assess long‐term biodiversity change.
- Published
- 2020
- Full Text
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5. Ergebnisse der Wertgrünlandkartierung
- Author
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Silke Lütt, Kai Dethmann, Wolfgang Petersen, and Jürgen Schmidt
- Published
- 2017
6. From Early Interest to Career Persistence: Understanding and Supporting STEM Pathways
- Author
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Manuela Paechter, Silke Luttenberger, Christine R. Starr, Erin Mackenzie, and Bernhard Ertl
- Subjects
n/a ,Education - Abstract
Knowledge, competencies, and reflective attitudes regarding STEM (science, technology, engineering, and mathematics) are essential for navigating global and societal changes in the economy and workforce [...]
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- 2024
- Full Text
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7. Coding Decoded: Exploring Course Achievement and Gender Disparities in an Online Flipped Classroom Programming Course
- Author
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Smirna Malkoc, Alexander Steinmaurer, Christian Gütl, Silke Luttenberger, and Manuela Paechter
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programming education ,online learning ,flipped classroom ,course achievement ,gender differences ,Education - Abstract
In introductory programming courses (IPCs), students encounter various difficulties that are related to low achievement and high dropout and failure rates. Technology-rich approaches that promote self-directed learning while facilitating competency development and knowledge construction through social collaboration may offer advantages in this context. The current study assesses such an instructional approach by (1) identifying antecedents and process variables related to course achievement in an online flipped classroom IPC and (2) testing for gender differences regarding antecedents, process variables, and course achievement. In the winter semester of 2020/21, a sample of 144 Austrian university students participated in a survey with measurements at different points in time. Multiple linear regression was carried out to explore factors related to course achievement. The results indicate that gender, achievement-avoidance goals, academic self-concept, engagement in asynchronous learning, and course satisfaction were positively related to achievement. In contrast, work avoidance was identified as a barrier to achievement. Additionally, multivariate analysis of variance (MANOVA) was employed to test gender differences. MANOVA revealed significant gender differences regarding learning goals, mathematical self-concept, work avoidance, and engagement in synchronous learning. There were no gender differences regarding course satisfaction or achievement. The study has implications for designing innovative programming courses that could foster course satisfaction and achievement and thus reduce dropout and failure rates.
- Published
- 2024
- Full Text
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8. Increasing Self-Concept and Decreasing Gender Stereotypes in STEM through Professional Development for Early Childhood Educators
- Author
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Sarah Feierabend, Sabine Hasenhütl, Manuela Paechter, Silke Luttenberger, Marina W. T. Eglmaier, and Lars Eichen
- Subjects
STEM education ,self-concept ,gender stereotypes ,gender and STEM ,early childhood education ,professional development ,Education - Abstract
Starting early in life, children, especially girls, experience obstacles when it comes to developing an interest in STEM. Although early childhood (EC) educators face an important task in promoting girls (and boys) in STEM, they often face challenges in doing so. Therefore, it is crucial for EC educators to cultivate positive attitudes, self-concepts, and STEM skills. To address these identified issues, a three-month professional development program was created for EC educators. This professional development program was evaluated using a pre–post design with a focus on the self-concept and gender stereotypes of EC educators. The program involved 30 female EC educators in evaluating these aspects. The statistical analyses show positive results in enhancing educators’ self-concepts and reducing gender stereotypes over the course of this professional development program. The results suggest the potential of the blended learning design in this professional development program and indicate that this program could serve as a promising model for future interventions.
- Published
- 2024
- Full Text
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9. Distributing Feedback Wisely to Empower Girls in STEM
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Manuela Paechter, Silke Luttenberger, and Bernhard Ertl
- Subjects
girls in STEM ,feedback ,growth mindset ,self-efficacy ,outcome expectations ,interest ,Education (General) ,L7-991 - Published
- 2020
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10. It Takes More Than One Swallow to Make a Summer: Measures to Foster Girls' and Women's Pathways Into STEM
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Silke Luttenberger, Petra Steinlechner, Bernhard Ertl, and Manuela Paechter
- Subjects
gender ,STEM ,self-efficacy ,interest ,career choice ,career counseling ,Psychology ,BF1-990 - Published
- 2019
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11. Self-Concept and Support Experienced in School as Key Variables for the Motivation of Women Enrolled in STEM Subjects With a Low and Moderate Proportion of Females
- Author
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Silke Luttenberger, Manuela Paechter, and Bernhard Ertl
- Subjects
gender ,STEM ,motivation ,academic self-concept ,school factors ,university students ,Psychology ,BF1-990 - Abstract
The proportion of women enrolled in STEM courses at university level has remained consistently low for decades. Differences, however, exist between various STEM domains: While engineering and technology appear especially unattractive, subjects such as mathematics, biology, or chemistry have better chances at attracting women. Research has mostly neglected these differences, treating STEM as an overall category. In the light of the differences in the proportions of women enrolled in and dropping out of various STEM subjects, the present study takes a more differentiated look to separately investigate the STEM subjects that have a low or moderate proportion of females. The following study focuses on female university students’ intrinsic and extrinsic motivations in these two groups of STEM subjects, asking to what degree the academic STEM self-concept and support experienced in both school and the family contribute to the motivation to study a STEM topic. Four hundred sixty-nine female students took part in the investigation. Two hundred eighty-four of them were enrolled in STEM subjects with a low proportion of females (STEM-LPF) and 185 in STEM subjects with a moderate proportion of females (STEM-MPF). A comparison of the two samples shows that women in STEM-LPF exceed women in STEM-MPF with regard to their academic STEM self-concept and intrinsic and extrinsic motivations. Different variables contribute to motivation in the two samples. For STEM-LPF, a latent regression analysis found positive relationships between the academic STEM self-concept and both intrinsic and extrinsic motivations, while support experienced in school and from the family was not related to motivation. By contrast, in the STEM-MPF sample, the academic self-concept was not related to motivation. Previous interest in STEM subjects in school contributed positively to present intrinsic and extrinsic motivations. An unexpected result, however, was found concerning activities in school that were designed to promote interest in STEM. Memories of these kinds of activities were negatively related to both intrinsic and extrinsic motivations. These measures might be experienced as intrusive support: attempts to promote STEM sometimes might backfire and achieve the opposite of what was intended.
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- 2019
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12. The Impact of Gender Stereotypes on the Self-Concept of Female Students in STEM Subjects with an Under-Representation of Females
- Author
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Bernhard Ertl, Silke Luttenberger, and Manuela Paechter
- Subjects
female STEM students ,impacts ,self-concept ,stereotypes ,support ,Psychology ,BF1-990 - Abstract
It's possible to assume that women who study STEM topics with a low proportion of females have successfully overcome barriers in school and the family, making them less prone to stereotypic views, and influences. The present study focuses on these kinds of factors and analyzes to which degree family factors, school-related factors, and individual stereotypes may influence a woman's academic self-concept. The following study presents a latent regression model which is based on a survey of 296 women from different German universities, all of whom are part of STEM programs of study that have
- Published
- 2017
- Full Text
- View/download PDF
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