Hannes Feilhauer

Hannes Feilhauer
University of Leipzig · Remote Sensing Centre for Earth System Research

Prof. Dr.

About

93
Publications
33,478
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,314
Citations
Introduction
Hannes Feilhauer works at the Institute of Geophysics and Geology of Leipzig University. His research interests cover the interdisciplinary field of biogeography, ecology, geoinformatics and remote sensing.
Additional affiliations
September 2020 - present
University of Leipzig
Position
  • Professor (Full)
October 2018 - August 2020
Freie Universität Berlin
Position
  • Professor
January 2012 - September 2018
Friedrich-Alexander-University of Erlangen-Nürnberg
Position
  • PostDoc Position
Education
January 2014 - July 2018
October 2006 - January 2011
University of Bonn
Field of study
  • Geography
October 2000 - September 2006
University of Bayreuth
Field of study
  • Geoecology

Publications

Publications (93)
Article
Full-text available
Leaf chlorophyll content (LCC) is an important indicator of plant health. Earth observation facilitates LCC monitoring on large spatial scales and within short time intervals by retrieving canopy LCC from spectral signals. However, in-situ measurements are still necessary to validate the predicted values and the accurate quantification of LCC is la...
Article
Full-text available
Biodiversity monitoring is an almost inconceivable challenge at the scale of the entire Earth. The current (and soon to be flown) generation of spaceborne and airborne optical sensors (i.e., imaging spectrometers) can collect detailed information at unprecedented spatial, temporal, and spectral resolutions. These new data streams are preceded by a...
Article
Full-text available
Deep learning and particularly Convolutional Neural Networks (CNN) in concert with remote sensing are becoming standard analytical tools in the geosciences. A series of studies has presented the seemingly outstanding performance of CNN for predictive modelling. However, the predictive performance of such models is commonly estimated using random cr...
Article
Information on grassland land-use intensity (LUI) is crucial for understanding trends and dynamics in biodiversity , ecosystem functioning, earth system science and environmental monitoring. LUI is a major driver for numerous environmental processes and indicators, such as primary production, nitrogen deposition and resilience to climate extremes....
Article
Full-text available
Accurate information on the spatial distribution of plant species and communities is in high demand for various fields of application, such as nature conservation, forestry, and agriculture. A series of studies has shown that Convolutional Neural Networks (CNNs) accurately predict plant species and communities in high-resolution remote sensing data...
Article
Reflectance spectroscopy in the visible-infrared and shortwave infrared (450-2500 nm) wavelength region is a rapid, cost-effective and non-destructive method that can be used to monitor heavy metal (PTE, potential toxic elements) contaminated areas. Due to the PTE pollution that has accumulated in the course of wastewater treatment, the existence o...
Article
Full-text available
Over the past decades, solar panels have been widely used to harvest solar energy owing to the decreased cost of silicon-based photovoltaic (PV) modules, and therefore it is essential to remotely map and monitor the presence of solar PV modules. Many studies have explored on PV module detection based on color aerial photography and manual photo int...
Article
Full-text available
Leaf mass per area (LMA), leaf dry matter content (LDMC) and leaf water content/ equivalent water thickness (EWT) are commonly used functional plant traits in ecology. Whereas spectroscopy has recently proven to be a powerful tool to collect such functional trait information across large scales, it remains unclear whether these reflectance-based tr...
Article
Monitoring global biodiversity from space through remotely sensing geospatial patterns has high potential to add to our knowledge acquired by field observation. Although a framework of essential biodiversity variables (EBVs) is emerging for monitoring biodiversity, its poor alignment with remote sensing products hinders interpolation between field...
Article
Full-text available
Question Which optical traits, retrieved from the biophysical models on Sentinel‐2 images, enable an estimation of tree species diversity based on the Spectral Variation Hypothesis? Location Coniferous mountain forest in the eastern Italian Alps. Methods We analyzed the PROSPECT‐5 and INFORM biophysical parameters as retrieved from canopy reflect...
Article
Full-text available
Urban areas contain a complex mixture of surface materials resulting in mixed pixels that are challenging to handle with conventional mapping approaches. In particular, for spaceborne hyperspectral images (HSIs) with sufficient spectral resolution to differentiate urban surface materials, the spatial resolution of 30 m (e.g. EnMAP HSIs) makes it di...
Chapter
Für das Monitoring im Naturschutz werden Daten zur Landbedeckung meist durch Kartierende im Feld erhoben. In manchen Gegenden sind solche Erfassungen jedoch nicht oder nur schwer durchführbar. Informationen von oben, wie sie Fernerkundungsdaten liefern, könnten hier prinzipiell unterstützen. Auch wenn keine stichprobenbasierten Datensätze, sondern...
Chapter
In zahlreichen Übersichtsartikeln wird der Fernerkundung ein großes Potenzial für den Einsatz in der Naturschutzplanung und dem Vegetationsmonitoring bescheinigt. Doch wann ist ein Einsatz wirklich zielführend und löst Probleme, die mit konventionellen Ansätzen schwer zu bearbeiten sind? Dieses Kapitel befasst sich anhand von aktuellen Beispielen m...
Article
Full-text available
Questions Is it possible to map floristic gradients in heterogeneous boreal vegetation by using remote sensing data? Does a continuous vegetation map enable the creation of a spatially continuous map of seasonal permafrost soil thaw depth? Location Bonanza Creek LTER, Fairbanks, Alaska, USA Methods Vegetation records are subjected to an ordination...
Article
Full-text available
Many studies analyzing spaceborne hyperspectral images (HSIs) have so far struggled to deal with a lack of pure pixels due to complex mixtures of urban surface materials. Recently, an alternative concept of gradients in urban surface material composition has been proposed and successfully applied to map cities with spaceborne HSIs without the requi...
Article
Full-text available
Mapping vegetation as hard classes based on remote sensing data is a frequently applied approach, even though this crisp, categorical representation is not in line with nature's fuzziness. Gradual transitions in plant species composition in ecotones and faint compositional differences across different patches are thus poorly described in the result...
Article
Full-text available
Our ability to measure plant characteristics across space and time is crucial for understanding and tracking the diversity and functioning of ecosystems. Ecological approaches to synthesize these characteristics have evolved from allocating species to predefined conventional plant functional types (cPFTs) to describing vegetation through delineatin...
Article
Mapping heathland habitats is generally challenging due to fine-scale habitats as well as spectral ambiguities between different classes. A multi-seasonal time-series of multispectral RapidEye data from several phenological stages was analysed towards the classification of different vegetation communities. A 3-level hierarchical dependent classific...
Article
Global warming is predicted to affect ecosystems, particularly in high-latitude regions where polar amplification accelerates temperature rise and environmental changes. Here, where plants grow under adverse conditions, a warmer climate provides more favourable conditions for growth and regeneration. At the alpine and polar tree line in Finnish Lap...
Article
Assessing biodiversity in arctic-alpine ecosystems is a costly task. We test in the current study whether we can map the spatial patterns of spider alpha and beta diversity using remotely-sensed surface reflectance and topography in a heterogeneous alpine environment in Central Norway. This proof-of-concept study may provide a tool for an assessmen...
Article
Full-text available
Body size is one of the most important individual traits, determining various other life-history traits, including fitness. Both evolutionary and ecological factors shape the body size in arthropods, but the relative contribution of abiotic drivers acting at different spatial scales has been little investigated. We aimed to identify the importance...
Conference Paper
Full-text available
The material composition of urban areas is important for urban climate modeling and urban canopy models. Since 2018, a few spaceborne imaging spectrometers have been launched such as the DESIS instrument on the ISS and the Italian PRISMA. The spatial resolution of these systems is around 30 m, which is in many cases not sufficient for urban applica...
Article
Mapping gradual transitions in plant species composition via a combination of ordination and regression from remote sensing data is becoming an established approach. However, the straight‐forward analysis of areas with high species turnover rates may result in a loss of information since a high level of generalization is required. In this study we...
Article
Full-text available
The recent use of hyperspectral remote sensing imagery has introduced new opportunities for soil organic carbon (SOC) assessment and monitoring. These data enable monitoring of a wide variety of soil properties but pose important methodological challenges. Highly correlated hyperspectral spectral bands can affect the prediction and accuracy as well...
Article
To understand processes in urban environments, such as urban energy fluxes or surface temperature patterns, it is important to map urban surface materials. Airborne imaging spectroscopy data have been successfully used to identify urban surface materials mainly based on unmixing algorithms. Upcoming spaceborne Imaging Spectrometers (IS), such as th...
Chapter
Full-text available
“Mapping the distribution and abundance of flowering plants using hyperspectral sensing.” This chapter investigates the use of hyperspectral sensing (HS) imaging to map the distribution and abundance of flowering plants as important data sets for landscape ecological and pollination efficacy studies and to prioritize, for instance, weed management...
Article
Full-text available
Combining remote sensing and field data allows for the detection of some invasive alien plant species with sufficient accuracy. Especially the use of satellite or UAS (unmanned aerial system) data may provide a useful addition to classical approaches. The feasibility of remote sensing based detection, however, always depends on the study area and t...
Conference Paper
Future spaceborne imaging spectrometers such as EnMAP allow for the monitoring the Earth’s surface and overcome the time- and cost critical limits of airborne based hyperspectral sensor systems. However, the spatial resolution of EnMAP is 30 m, which is in many cases not sufficient to provide essential information on urban areas that are characteri...
Article
Full-text available
Non-native invasive plant species can influence ecosystem functioning over broad spatial scales, but most research on ecosystem impacts has focused on the plot level covering sampling units of only a few square meters or less. We used a multi-scale approach to analyze structural and leaf chemical vegetation traits depending on the presence of non-n...
Article
Full-text available
The effect of environmental conditions on reproductive traits in spiders is not completely understood. We studied the trade-off between the egg number and egg size of a common spider species along an elevational gradient in Norway. Life history theory predicts that egg size should decrease and clutch size increase as temperatures rise. In 2006, 201...
Article
Full-text available
Imaging spectroscopy is a powerful tool for mapping chemical leaf traits at the canopy level. However, covar-iance with structural canopy properties is hampering the ability to predict leaf biochemical traits in structurally heterogeneous forests. Here, we used imaging spectroscopy data to map canopy level leaf nitrogen (N mass) and phosphorus conc...
Article
Full-text available
The synergies between remote sensing technologies and ecological research have opened new avenues for the study of alien plant invasions worldwide. Such scientific advances have greatly improved our capacity to issue warnings, develop early-response systems and assess the impacts of alien plant invasions on biodiversity and ecosystem functioning. H...
Article
Full-text available
Plant and community traits provide valuable insights in ecosystem functioning. Yet, such traits are costly to sample. Existing trait data bases give access to species-specific traits and help to reduce the sampling effort and costs. However, many traits show a high intra-specific plasticity due to the variability of environmental conditions, which...
Article
Full-text available
Remote sensing is a promising tool for detecting invasive alien plant species. Mapping and monitoring those species requires accurate detection. So far, most studies relied on models that are locally calibrated and validated against available field data. Consequently, detecting invasive alien species at new study areas requires the acquisition of a...
Article
Full-text available
Plant functional groups—in our case grass, herbs, and legumes—and their spatial distribution can provide information on key ecosystem functions such as species richness, nitrogen fixation, and erosion control. Knowledge about the spatial distribution of plant functional groups provides valuable information for grassland management. This study descr...
Article
Full-text available
1. Biodiversity includes multiscalar and multitemporal structures and processes, with different levels of functional organization, from genetic to ecosystemic levels. One of the mostly used methods to infer biodiversity is based on taxonomic approaches and community ecology theories. However, gathering extensive data in the field is difficult due t...
Article
Full-text available
After more than 50-years of armed conflict, Colombia is now transitioning to a more stable social and political climate due to a series of peace agreements between the government and different armed groups. Consequences of these socio-economic and political changes on ecosystems are largely uncertain, but there is growing concern about derived incr...
Article
Assessing biodiversity from field-based data is difficult for a number of practical reasons: (i) establishing the total number of sampling units to be investigated and the sampling design (e.g. systematic random, stratified) can be difficult; (ii) the choice of the sampling design can affect the results; and (iii) defining the focal population of i...
Presentation
Full-text available
Colombia is one of the most biodiverse countries on Earth and is currently entering an era of tremendous societal and economic transformations. Formerly inaccessible conflict areas will face development, agricultural expansion, and intrusion of extractive industries threatening Colombia’s ecosystems and biodiversity. This constitutes a great challe...
Article
High mountain grasslands offer multiple goods and services to society but are severely threatened by improper land use practices such as abandonment or rapid intensification. In order to reduce abandonment and strengthen the common extensive agricultural practice a sustainable land use management of high mountain grasslands is needed. A spatially d...
Article
Full-text available
To propose a species distribution modelling framework and its companion “iSDM” R package for predicting the potential and realized distributions of invasive species within the invaded range. Northern France. The non-equilibrium distribution of invasive species with the environment within the invaded range affects the environmental representativenes...
Article
Alien invasive species can affect large areas, often with wide-ranging impacts on ecosystem structure, function and services. Prunus serotina is a widespread invader of European temperate forests, where it tends to form homogeneous stands and limits recruitment of indigenous trees. We hypotesized that invasion by P. serotina would be reflected in t...
Article
Full-text available
Reliable distribution maps are crucial for the management of invasive plant species. An alternative to traditional field surveys is the use of remote sensing data, which allows coverage of large areas. However, most remote sensing studies on invasive plant species focus on mapping large stands of easily detectable study species. In this study, we u...
Article
Most plant species feature similar biochemical compositions and thus similar spectral signals. Still, empirical evidence suggests that the spectral discrimination of species and plant assemblages is possible. Success depends on the presence or absence of faint but detectable differences in biochemical (e.g., pigments, leaf water and dry matter cont...
Article
Impacts of human civilization on ecosystems threaten global biodiversity. In a changing environment, traditional in situ approaches to biodiversity monitoring have made significant steps forward to quantify and evaluate BD at many scales but still, these methods are limited to comparatively small areas. Earth observation (EO) techniques may provide...
Article
Most remote sensing approaches for mapping invasive plant species focus on species in a prominent phenological stage, such as during flowering, and do not systematically evaluate the performance for mapping lower cover fractions. In this study, we used airborne imaging spectroscopy (also known as hyperspectral imaging) to detect the invasive grass...
Article
Land use and land cover maps are one of the most commonly used remote sensing products. In many applications the user only requires a map of one particular class of interest, e.g. a specific vegetation type or an invasive species. One-class classifiers are appealing alternatives to common supervised classifiers because they can be trained with labe...
Article
Pollination is an ecosystem function that varies at local spatial scales. Remote sensing may help to quantify and map the resulting patterns for a better understanding of ecosystem functioning. This task is challenging because the signal measured by sensors is dominated by leaf and canopy optical traits that determine the vegetation spectrum. No di...
Article
The analysis of rapid land cover/land use changes by means of remote sensing is often based on data acquired under varying and occasionally unfavorable conditions. In addition, such analyses frequently use data acquired by different sensor systems. These acquisitions often differ with respect to sun position and sensor viewing geometry which lead t...
Poster
Full-text available
Species distribution models (SDMs) are important tools to investigate changing distributions such as spread of invasive species and to propose efficient management strategies. However, to ensure robust predictions of species distribution it is important to develop a multi-scale SDM given that the determinants of species distribution are hierarchica...
Article
Full-text available
In the Georgian Caucasus, unregulated grazing has damaged grassland vegetation cover and caused erosion. Methods for monitoring and control of affected territories are urgently needed. Focusing on the high-montane and subalpine grasslands of the upper Aragvi Valley, we sampled grassland for soil, rock, and vegetation cover to test the applicability...
Article
Shrub encroachment has been observed in many alpine and arctic environments and is expected to significantly alter these ecosystems. Mapping these processes with remote sensing is a powerful tool for monitoring purposes. Thus, we test the distinctiveness of the reflectance signature of target species relative to their co-occurring shrub species usi...
Article
Full-text available
Differentiations in reproductive traits along climatic gradients can be substantial for a species to spread along a wide spatial range. We compared the reproductive effort allocated to first egg sacs of five species of the genus Pardosa: P. palustris (Linnaeus 1758), P. amentata (Clerck 1757), P. lugubris (Walckenaer 1802), P. hyperborea (Thorell 1...