Katharina Birgit Budde- PhD
- Researcher at Northwest German Forest Research Institute
Katharina Birgit Budde
- PhD
- Researcher at Northwest German Forest Research Institute
About
147
Publications
12,472
Reads
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693
Citations
Introduction
I am interested in ecological population genetics and genomics of tree species, particularly in temperate, mediterranean and tropical regions (Africa and Neotropics). By gaining insights in evolutionary processes shaping the demographic history, spatial genetic structure and local adaptations of natural tree populations, I aim to contribute to a better understanding and improved conservation and management strategies for our future forests.
Current institution
Northwest German Forest Research Institute
Current position
- Researcher
Additional affiliations
September 2016 - December 2019
September 2020 - October 2023
January 2020 - August 2020
Education
October 2010 - May 2014
October 2009 - October 2010
July 2006 - June 2007
Publications
Publications (147)
Hymenoscyphus fraxineus, the causal agent of Ash Dieback (ADB), has been introduced to eastern Europe in the 1990s from where it spread causing decline in European ash populations. However, the genetic basis of the molecular response in tolerant and susceptible ash trees to this disease is still largely unknown. We performed RNA-sequencing to study...
Common ash ( Fraxinus excelsior ) is under intensive attack from the invasive alien pathogenic fungus Hymenoscyphus fraxineus , causing ash dieback at epidemic levels throughout Europe. Previous studies have found significant genetic variation among genotypes in ash dieback susceptibility and that host phenology, such as autumn yellowing, is correl...
Common beech (Fagus sylvatica L.) is one of Europe's most widespread forest tree species. In the actual context of climate change, this species has responded through its self-regulation mechanisms, proving a high plasticity. It is important to explore the specific mechanisms driving its response to climate change, taking into account silvicultural,...
Ash dieback (ADB) has been causing the progressive decline of Fraxinus excelsior trees throughout Europe, urging research and forest management to develop strategies to combat ADB. A genetically heritable component in susceptibility to this fungal disease was reported in common gardens. Thus, exploring the molecular basis of ADB susceptibility will...
The delay between disturbance events and genetic responses within populations is a common but surprisingly overlooked phenomenon in ecology and evolutionary and conservation genetics. If not accounted for when interpreting genetic data, this time lag problem can lead to erroneous conservation assessments. We (i) identify life-history traits related...
The effect of past environmental changes on the demography and genetic diversity of natural populations remains a contentious issue and has rarely been investigated across multiple, phylogenetically distant species. Here, we perform comparative population genomic analyses and demographic inferences for seven widely distributed and ecologically cont...
Gene flow affects the genetic diversity and structure of tree species and can be influenced by stress related to changing climatic conditions. The study of tree species planted in locations outside their natural range, such as arboreta or botanical gardens, allows us to analyse the effect of severe fragmentation on patterns and distances of gene fl...
Limited gene dispersal via pollen and seeds typically leads to clustering of related individuals within populations, known as fine-scale spatial genetic structure (FSGS). It reflects microevolutionary processes at the local scale and can inform forest management practices for conservation and restoration purposes. The strength of FSGS varies widely...
Forest ecosystems are of global importance, ecologically, economically and culturally. However, despite their fundamental role in mitigating the worst effects of climate change, to date there have been surprisingly few resources devoted to defining, conserving and planning resilient forests for the future. Progress in this field of research, which...
Taxus baccata L. is a highly valuable species with wide distribution but scattered and locally rare occurrence. Human intervention, including forest management practices and fragmentation, can significantly impact the species’ genetic diversity, structure, and dynamics. In this study, we investigated these factors within T. baccata populations in t...
The delay between environmental changes and the corresponding genetic responses within populations is a common but surprisingly overlooked phenomenon in ecology, evolutionary and conservation genetics. This time lag problem can lead to erroneous conservation assessments when solely relying on genetic data. We identify population size, life-history...
Common ash (Fraxinus excelsior) is under intensive attack from the invasive alien pathogenic fungus Hymenoscyphus fraxineus, causing ash dieback at epidemic levels throughout Europe. Previous studies have found significant genetic variation among clones in ash dieback susceptibility and that host phenology, such as autumn yellowing, is correlated w...
The effects of selection on an organism's genome are hard to detect on small spatial scales, as gene flow can swamp signatures of local adaptation. Therefore, most genome scans to detect signatures of environmental selection are performed on large spatial scales; however, divergent selection on the local scale (e.g. between contrasting soil conditi...
New mutations provide the raw material for evolution and adaptation. The distribution of fitness effects (DFE) describes the spectrum of effects of new mutations that can occur along a genome, and is therefore of vital interest in evolutionary biology. Recent work has uncovered striking similarities in the DFE between closely related species, promp...
European ash, Fraxinus excelsior is facing the double threat of ongoing devastation by the invasive fungal pathogen, Hymenoscyphus fraxineus and the imminent arrival of the non-native emerald ash borer (EAB), Agrilus planipennis. The spread of EAB which is currently moving westwards from European Russia and Ukraine into central Europe, poses an add...
Forests provide invaluable economic, ecological, and social services. At the same time, they are exposed to several threats, such
as fragmentation, changing climatic conditions, or increasingly destructive pests and pathogens. Trees, the inherent species of
forests, cannot be viewed as isolated organisms. Manifold (micro)organisms are associated wi...
The effects of selection on an organism's genome are hard to detect on small spatial scales, as gene flow can erase signatures of local adaptation. Most environmental association analyses are performed on large spatial scales, however divergent selection on the local scale (e.g. between contrasting soil conditions) has also been demonstrated, in pa...
Past environmental changes have shaped the demographic history and genetic diversity of natural populations, yet the timescale and strength of these effects have not been investigated systematically and simultaneously for multiple phylogenetically distant species. We performed comparative population genomic analyses and demographic inference for se...
Tree species are suffering from changing and stressful environmental conditions worldwide. Fagus sylvatica L., one of the most common Central European deciduous tree species showed symptoms of crown damage, a reduction in growth and increased mortality following the severe recent drought years. For Germany Fagus orientalis Lipsky, a closely related...
Background and aims – Chilgoza pine ( Pinus gerardiana) is a near-threatened tree species from the north-western Himalayas. This species is the economically most important pine in Afghanistan because of its edible nuts; however, its distribution range is disjunct and restricted to a few isolated regions. The IUCN lists Chilgoza as a near threatened...
Common ash (Fraxinus excelsior L.) is an economically and ecologically important tree species in Europe acutely threatened by ash dieback. Here, we present a new set of Simple Sequence Repeat markers for F. excelsior and six related ash species based on published in silico designed primers. Forty SSR markers, mainly from genic regions, were tested...
Estimates of contemporary effective population size (Ne) can provide valuable information for genetic conservation and monitoring, pinpointing populations at higher risk of genetic erosion, decreased fitness, maladaptation and, ultimately, demographic decline. There are however potential limitations in the application of commonly employed genetic e...
The advent of the next-generation genome sequencing technologies has allowed approaching the sequencing and analysis of large and complex conifer genomes. Maritime pine (Pinus pinaster Ait.) is an economically and ecologically important conifer species widely distributed in South-West Europe, which shows a significant genetic and adaptive variabili...
Forest ecosystems are increasingly challenged by extreme events, e.g. drought, storms, pest attacks and fungal pathogen outbreaks, causing severe ecological and economic losses. Understanding the genetic basis of adaptive traits in tree species is of key importance to preserve forest ecosystems, as genetic variation in a trait (i.e. heritability) d...
Background and aims – The evolutionary history of Amazonia’s hyperabundant tropical tree species, also known as “hyperdominant” species, remains poorly investigated. We assessed whether the hyperdominant Eschweilera coriacea (DC.) S.A.Mori (Lecythidaceae) represents a single genetically cohesive species, and how its genetic constitution relates to...
Forest ecosystems are increasingly challenged by extreme events, e.g. pest and pathogen outbreaks, causing severe ecological and economical losses. Understanding the genetic basis of adaptive traits in tree species is of key importance to preserve forest ecosystems
Adaptive phenotypes, including susceptibility to two fungal pathogens ( Diplodia sap...
Aim
The Hyrcanian forests, in a region of lowland and montane temperate pure and mixed broadleaf forests located in Iran, near the southern shores of the Caspian Sea, form part of the Caucasus biodiversity hotspot. In this region, species experienced suitable and stable environmental conditions over historic periods and even some Arcto‐Tertiary rel...
In Europe, the most widely used Christmas tree species, Abies nordmanniana, has a long history of infestation with the adelgid Dreyfusia nordmannianae. Since 2011, the species has furthermore been increasingly damaged by the fungus Neonectria neomacrospora. The objective was to study whether infestations by N. neomacrospora were facilitated by the...
Genetic responses to environmental changes take place at different spatial scales. While the effect of environment on the distribution of species’ genetic diversity at large geographical scales has been the focus of several recent studies, its potential effects on genetic structure at local scales are understudied. Environmental effects on fine-sca...
The analysis of fine-scale spatial genetic structure (FSGS) within populations can provide insights into eco-evolutionary processes. Restricted dispersal and locally occurring genetic drift are the primary causes for FSGS at equilibrium, as described in the isolation by distance (IBD) model. Beyond IBD expectations, spatial, environmental or histor...
Genetic clustering based on STRUCTURE and TESS.
(DOCX)
Genetic diversity and spatial genetic structure statistics in Symphonia globulifera based on different groups of SSRs.
(DOCX)
Altitudinal clustering of gene pools in Symphonia globulifera populations.
(DOCX)
Geographic coordinates and microsatellite genotypes of Symphonia globulifera samples used in this study.
(XLSX)
Evolutionary relationships among psba-trnH plastid DNA haplotypes and Genbank accession numbers of sequences.
(DOCX)
Estimates of mating system and FSGS parameters in genetic clusters of Symphonia globulifera.
(DOCX)
Background and Aims The recurrence of wildfires is predicted to increase due to global climate change, resulting in severe impacts on biodiversity and ecosystem functioning. Recurrent fires can drive plant adaptation and reduce genetic diversity; however, the underlying population genetic processes have not been studied in detail. In this study, th...
The genus Erica represents the epitome of plant biodiversity in the South African Cape fynbos with over 700 species. This genus is composed of seeder and resprouter species, but both species diversity and endemism are strongly linked to the seeder habit and concentrated in the southwestern Cape Floristic Region (CFR). Erica coccinea is a relatively...
Emerging diseases often originate from host shifts of introduced pests or pathogens. Genetic resistance of the host to such diseases might be limited or absent due to the lack of coevolutionary history. We review six examples of major disease outbreaks on native tree species caused by different introduced pests and pathogens that led to large ecolo...
IntroductionDetermining the sources and role of intra-specific genetic variation is a classical focus of evolutionary biology (Mitchell-Olds et al. 2007). Ever since the beginning of population genetic studies in forest trees, the observation of high levels of within-stand phenotypic and, later, molecular diversity has been a commonplace. In these...
The biogeographic history of the African rain forests has been contentious. Phylogeography,
the study of the geographic distribution of genetic lineages within species, can highlight the signatures
of historical events affecting the demography and distribution of species (i.e. population fragmentation
or size changes, range expansion/contraction) a...
Wildfire is a major ecological driver of plant evolution. Understanding the genetic basis of plant adaptation to wildfire is crucial, because impending climate change will involve fire regime changes worldwide. We studied the molecular genetic basis of serotiny, a fire‐related trait, in Mediterranean maritime pine using association genetics.
A sing...
Understanding the history of forests and their species' demographic responses to past disturbances is important for predicting impacts of future environmental changes. Tropical rainforests of the Guineo-Congolian region in Central Africa are believed to have survived the Pleistocene glacial periods in a few major refugia, essentially centred on mou...
Premise of the study:
Pinus pinea is one of the few widespread plant species that are also genetically depauperate. It is also an important commercial species with high market value seeds. A deeper knowledge of the existing population genetic variation was needed.
Methods and results:
Twelve nuclear microsatellites were isolated from genomic and...
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