Alexandra Weigelt
Leipzig University
Publications 158
#1S. Schaub (ETH Zurich)
#2Robert Finger (AAEA: Agricultural & Applied Economics Association)H-Index: 33
Last.Michael Scherer-Lorenzen (ETH Zurich)H-Index: 49
view all 8 authors...
In agricultural settings, plant diversity is often associated with low biomass yield and forage quality, while biodiversity experiments typically find the opposite. We address this controversy by assessing, over 1 year, plant diversity effects on biomass yield, forage quality (i.e. nutritive values), quality-adjusted yield (biomass yield × forage quality), and revenues across different management intensities (extensive to intensive) on subplots of a large-scale grassland biodiversity experiment....
#1Peter Dietrich (FSU: University of Jena)H-Index: 33
#2Anna Roeder (Helmholtz Centre for Environmental Research - UFZ)H-Index: 1
Last.Christiane Roscher (Helmholtz Centre for Environmental Research - UFZ)H-Index: 44
view all 10 authors...
#1Joana Bergmann (FU: Free University of Berlin)H-Index: 5
#2Alexandra Weigelt (Leipzig University)H-Index: 41
Last.Liesje Mommer (WUR: Wageningen University and Research Centre)H-Index: 35
view all 20 authors...
Plant economics run on carbon and nutrients instead of money. Leaf strategies aboveground span an economic spectrum from ‘live fast and die young’ to ‘slow and steady’, but the economy defined by root strategies belowground remains unclear. Here we take a holistic view of the belowground economy, and show that root-mycorrhizal collaboration can short circuit a one-dimensional economic spectrum, providing an entire space of economic possibilities. Root trait data from 1,781 species across the glo...
#1Yanhao Feng (Lanzhou University)H-Index: 5
#2Santiago Soliveres (University of Bern)H-Index: 29
Last.Markus Fischer (University of Bern)H-Index: 65
view all 13 authors...
The inference of pairwise competitive outcomes (PCO) and multispecies competitive ranks and intransitivity from empirical data is essential to evaluate how competition shapes plant communities. Three categories of methods, differing in theoretical background and data requirements, have been used: (a) theoretically sound coexistence theory‐based methods, (b) index‐based methods, and (c) ‘process‐from‐pattern’ methods. However, how they are related is largely unknown. In this study, we explored th...
#1Kathryn E. Barry (Leipzig University)H-Index: 5
#2Jasper van Ruijven (WUR: Wageningen University and Research Centre)H-Index: 32
Last.Alexandra Weigelt (Leipzig University)H-Index: 41
view all 22 authors...
Locally, plant species richness supports many ecosystem functions. Yet, the mechanisms driving these often‐positive biodiversity–ecosystem functioning relationships are not well understood. Spatial resource partitioning across vertical resource gradients is one of the main hypothesized causes for enhanced ecosystem functioning in more biodiverse grasslands. Spatial resource partitioning occurs if species differ in where they acquire resources and can happen both above‐ and belowground. However, ...
1 CitationsSource
#1Oliver Elle (Technische Universität Darmstadt)
#2Ronny Richter (Leipzig University)H-Index: 2
Last.Alexandra Weigelt (Leipzig University)H-Index: 41
view all 4 authors...
1. Root lignin is a key driver of root decomposition, which in turn is a fundamental component of the terrestrial carbon cycle and increasingly in the focus of ecologists and global climate change research. However, measuring lignin content is labor-intensive and therefore not well-suited to handle the large sample sizes of most ecological studies. To overcome this bottleneck, we explored the applicability of high-throughput near infrared spectroscopy (NIRS) measurements to predict fine root lig...
#1Andreas Schuldt (MLU: Martin Luther University of Halle-Wittenberg)H-Index: 19
#2Anne Ebeling (FSU: University of Jena)H-Index: 20
Last.Nico Eisenhauer (Leipzig University)H-Index: 45
view all 22 authors...
Humans modify ecosystems and biodiversity worldwide, with negative consequences for ecosystem functioning. Promoting plant diversity is increasingly suggested as a mitigation strategy. However, our mechanistic understanding of how plant diversity affects the diversity of heterotrophic consumer communities remains limited. Here, we disentangle the relative importance of key components of plant diversity as drivers of herbivore, predator, and parasitoid species richness in experimental forests and...
6 CitationsSource
#1Adam Thomas Clark (Helmholtz Centre for Environmental Research - UFZ)H-Index: 5
#2Lindsay A. Turnbull (University of Oxford)H-Index: 27
Last.Bernhard Schmid (UZH: University of Zurich)H-Index: 9
view all 16 authors...
Models of natural processes necessarily sacrifice some realism for the sake of tractability. Detailed, parameter-rich models often provide accurate estimates of system behaviour but can be data-hungry and difficult to operationalize. Moreover, complexity increases the danger of 'over-fitting', which leads to poor performance when models are applied to novel conditions. This challenge is typically described in terms of a trade-off between bias and variance (i.e. low accuracy vs. low precision). I...
#1Birgit Möller (MLU: Martin Luther University of Halle-Wittenberg)H-Index: 8
#2Hongmei Chen (Leipzig University)H-Index: 3
Last.Stefan Posch (MLU: Martin Luther University of Halle-Wittenberg)H-Index: 13
view all 8 authors...
Background and aims Minirhizotrons are commonly used to study root turnover which is essential for understanding ecosystem carbon and nutrient cycling. Yet, extracting data from minirhizotron images requires extensive annotation effort. Existing annotation tools often lack flexibility and provide only a subset of the required functionality. To facilitate efficient root annotation in minirhizotrons, we present the user-friendly open source tool rhizoTrak.
#1Nico EisenhauerH-Index: 45
#2Michael BonkowskiH-Index: 52
Last.Bernhard SchmidH-Index: 2
view all 25 authors...
The functioning and service provisioning of ecosystems in the face of anthropogenic environmental and biodiversity change is a cornerstone of ecological research. The last three decades of biodiversity–ecosystem functioning (BEF) research have provided compelling evidence for the significant positive role of biodiversity in the functioning of many ecosystems. Despite broad consensus of this relationship, the underlying ecological and evolutionary mechanisms have not been well understood. This co...