Christian Wolter

Christian Wolter
Leibniz-Institute of Freshwater Ecology and Inland Fisheries | IGB

About

230
Publications
99,174
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
7,124
Citations
Citations since 2017
73 Research Items
4417 Citations
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800
20172018201920202021202220230200400600800

Publications

Publications (230)
Article
Protected areas are a common management tool to conserve habitats and species by controlling access and disturbances by humans. Whenever protected areas result in restricting access to riparian zones in lakes, they may have positive effects on habitats and taxa beyond fish by lowering influences of trampling or boating on plants, by reducing the de...
Conference Paper
Full-text available
The worldwide increasing number of national guidelines and growing experience with realized green bank protections (constructions using insofar possible living or at least wooden construction material) in navigable waters, led to install a PIANC INCOM Working Group (WG) to collect and condense expert knowledge in this field of work and prepare it f...
Article
Full-text available
1. Gravel pit lakes are common across Europe. These novel ecosystems serve as model systems to study human-induced and natural colonisation of isolated lakes by fish. Fisheries-management activities can quickly spread species over large distances, possibly homogenising fish communities across ecosystems, while fostering local fish diversity. 2. Ou...
Chapter
Full-text available
The proliferation of hydropower development to meet obligations under the Renewable Energy Directive has also seen the emergence of conflict between the hydropower developers and the fisheries and conservation sectors. To address this trade-off between hydroelectricity supply and its environmental costs, this chapter introduces a series of tools an...
Chapter
Full-text available
This chapter very briefly outlines site and constellation specific direct and indirect impacts of a hydropower scheme primarily on fishes. It describes potential effects of single elements of a hydropower scheme, such as available migration routes up- and downstream, impoundment, hydraulic head, turbine type and mode of operation. It summarises the...
Article
Full-text available
In context of transitioning towards renewable energy, hydroelectricity has gained global relevance. However, hydropower plants have severe impacts on aquatic habitat and biota: Dams disrupt migration routes of diad-romous and potamodromous fish species, degrade the hydro-morphology of streams and turbines cause high mortalities in fishes. To suppor...
Article
Full-text available
Species distribution models (SDMs) have been widely applied to predict geographic ranges of species across space and time under the assumption of niche conservatism (i.e., species niches change very slowly). However, an increasing number of studies have reported evidence of rapid niche changes across space and time, which has sparked a widespread d...
Article
Full-text available
Global freshwater biodiversity is declining dramatically, and meeting the challenges of this crisis requires bold goals and the mobilisation of substantial resources. While the reasons are varied, investments in both research and conservation of freshwater biodiversity lag far behind those in the terrestrial and marine realms. Inspired by a global...
Article
Full-text available
The cover image is based on the Viewpoint A global agenda for advancing freshwater biodiversity research by Alain Maasri et al., https://doi.org/10.1111/ele.13931. Image Credit: Solvin Zankl. image
Article
The aim of this manuscript is to highlight the main elements of the resilience of riverine landscapes. These include factors that contribute to the resistance and recovery of rivers to environmental stress and the determinants of disturbance(s). These will reflect some combination of physical (based in geomorphological features), ecological (based...
Book
Full-text available
Rivers of Europe, Second Edition, presents the latest update on the only primary source of complete and comparative baseline data on the biological and hydrological characteristics of more than 180 of the highest profile rivers in Europe. With even more full-color photographs and maps, the book includes conservation information on current patterns...
Chapter
Some of the main rivers of the Central European Highlands and Plains flow into the Baltic and North Seas, including the rivers Weser, Elbe, and Oder, drain the ecoregion of the central European highlands and plains. In addition to these rivers, this chapter describes some smaller but peculiar rivers such as the Em (Sweden), Skjern (Denmark), Spree...
Article
Full-text available
Globally, policies aiming for conservation of species, free-flowing rivers, and promotion of hydroelectricity as renewable energy and as a means to decarbonize energy systems generate trade-offs between protecting freshwater fauna and development of hydropower. Hydroelectric turbines put fish at risk of severe injury during passage. Therefore, comp...
Article
Full-text available
With the increasing importance of recreational activities in and around inland water bodies, there is a need for sound knowledge about their ecological impacts. This narrative review summarizes and analyses the ecological effects of the land-based activities walking, biking, nature observing and relaxing on the shoreline as well as the water-based...
Article
Human presence at water bodies can have a range of ecological impacts, creating trade-offs between recreation as an ecosystem service and conservation. Conservation policies could be improved by relying on robust knowledge about the relative ecological impacts of water-based recreation. We present the first global synthesis on recreation ecology in...
Article
Full-text available
The type and extent of habitats along the shoreline specify the distribution of fish in the littoral zone of lakes, but effects are likely species and size-specific and might be overwhelmed by lake-level environmental factors that drive fish abundance (e.g. trophic state). We applied a replicated transect-sampling design by electrofishing assessing...
Article
Full-text available
Die Leopoldina Nationale Akademie der Wissenschaften legte im Jahr 2020 eine Analyse zur Biodiversitätskrise in terrestrischen und aquatischen Ökosystemen vor. Die in diesem normativen Bericht getätigten Aussagen zur Rolle und Bedeutung der Fischerei und Aquakultur beim Rückgang der Biodiversität werden in vorliegendem Beitrag einer kritischen Bewe...
Article
Restoration of spawning and juvenile habitats is often used to restore fish abundances in rivers, although often with unclear results. To study the effects of habitat limitations on the common barbel (Barbus barbus), a riverine litophilic cyprinid fish, an age-structured population model was developed. Using a Bayesian modeling approach, spawning a...
Code
Hydroelectricity is critical for decarbonizing global energy production, but hydropower plants affect rivers, disrupt their continuity, and threaten migrating fishes. This puts hydroelectricity production in conflict with efforts to protect threatened species and re-connect fragmented ecosystems. Assessing the impact of hydropower on fishes will su...
Article
Full-text available
This study aims to complement existing fish-based assessment approaches by classifying European lampreys and fish species according to their probability of occurrence in six different longitudinal river regions and five types of floodplain water bodies under unimpaired conditions. The main objective was to provide for the first time harmonized occu...
Preprint
Full-text available
Freshwater biodiversity is declining dramatically, and the current biodiversity crisis requires defining bold goals and mobilizing substantial resources to meet the challenges. While the reasons are varied, both research and conservation of freshwater biodiversity lag far behind efforts in the terrestrial and marine realms. We identify fifteen pres...
Preprint
Full-text available
Freshwater biodiversity is declining dramatically, and the current biodiversity crisis requires defining bold goals and mobilizing substantial resources to meet the challenges. While the reasons are varied, both research and conservation of freshwater biodiversity lag far behind efforts in the terrestrial and marine realms. We identify fifteen pres...
Article
Full-text available
Hydroelectricity is critical for decarbonizing global energy production, but hydropower plants affect rivers, disrupt their continuity, and threaten migrating fishes. This puts hydroelectricity production in conflict with efforts to protect threatened species and reconnect fragmented ecosystems. Assessing the impact of hydropower on fishes will sup...
Article
Water wheels are low head hydropower converters considered fish friendly, although their ecological behavior has not been scientifically assessed. The results presented in the available reports are not generalized (thus hardly applicable in engineering applications), and they have not been performed at different hydraulic conditions or wheel charac...
Article
Full-text available
• Humanity is facing a biodiversity crisis, with freshwater‐associated biodiversity in a particularly dire state. Novel ecosystems created through human use of mineral resources, such as gravel pit lakes, can provide substitute habitats for the conservation of freshwater and riparian biodiversity. Many of these artificial ecosystems are subject to...
Chapter
Aim: Understanding response mechanisms to disturbances in river ecosystems. Main concepts covered: Ecological, engineering and socioeconomic resilience. Main methods covered: Assessment of flow thresholds for stability in engineering resilience, trait-based approaches for ecological resilience assessment, ecosystem services assessment for socioecon...
Article
Vorliegende Studie erfasst erstmalig sämtliche Standgewässer in Niedersachsen und zeigt, dass künstlich ge-schaffene kleine Baggerseen der dominierende Gewässertyp der Region sind. Zudem legt diese Studie verglei-chende Ergebnisse zur Biodiversität anglerisch bewirtschafteter und unbewirtschafteter Baggerseen vor. Ob-wohl die anglerisch bewirtschaf...
Article
Full-text available
The reliability of transferring species distribution models (SDMs) to new ranges and future climates has been widely debated. Biological invasions offer the unique opportunity to evaluate model transferability, as distribution data between species’ native and introduced ranges are geographically independent of each other. Here, we performed the fir...
Article
Full-text available
The ongoing digital revolution in the age of big data is opening new research opportunities. Culturomics and iEcology, two emerging research areas based on the analysis of online data resources, can provide novel scientific insights and inform conservation and management efforts. To date, culturomics and iEcology have been applied primarily in the...
Article
Ein Forschungsprojekt zeigt neue Wege für den Artenschutz an künstlichen Gewässern. Untersucht werden positive und negative Einflüsse von Angelvereinen und deren Gewässernutzung auf die gewässergebundene Biodiversität. Wasser ist Leben – je natürlicher ein Gewässer, desto besser. Doch wo findet man in unserer Kulturlandschaft urtümliche Seen und T...
Article
While fragmentation and habitat loss due to water infrastructure threaten freshwater biodiversity worldwide, historic canals have the potential to contribute to both cultural heritage and biodiversity conservation. Shifting management objectives regarding historic canals from development to recreation and conservation offer opportunities for achiev...
Article
Full-text available
Significance There has been a widespread debate whether the ecological niche of species is conserved across space and time. This niche conservatism hypothesis is of high practical relevance for conserving biodiversity. Here, we synthesized empirical evidence on this hypothesis for invasive species to investigate how their climatic niche changes bet...
Technical Report
Full-text available
BfN-Skripten. Entwicklung eines Mortalitäts-Gefährdungs-Index für Fische im Zusammenhang mit anthropogen-induzierter Mortalität an Wasserkraftanlagen inkl. einer vorhabenspezifischen Bewertung von Individuenverlusten sowie einem methodischen Bewertungsansatz zur Abschätzung wie konstellationsspezifische Risiken von Wasserkraft im Einzelfall unter B...
Article
Full-text available
Although the invention and widespread use of artificial light is clearly one of the most important human technological advances, the transformation of nightscapes is increasingly recognized as having adverse effects. Night lighting may have serious physiological consequences for humans, ecological and evolutionary implications for animal and plant...
Article
Full-text available
Species conservation, river rehabilitation, stock enhancement, environmental impact assessment and related planning tools require indicators to identify significant impacts but also mitigation success. Since river systems are shaped by disturbances from floods and droughts, typical riverine fish species should have evolved life history traits provi...
Article
KW Korrespondenz Wasserwirtschaft Die Erholungs- und Freizeitschifffahrt ist der am stärksten wachsende Zweig des Schiffsverkehrs. Das Bundesprogramm Blaues Band Deutschland (BBD) sieht eine Förderung von Erholungs- und Freizeitschifffahrt in Nebenwasserstraßen vor, welche zeitgleich revitalisiert und ökologisch aufgewertet werden sollen. Wie aber...
Technical Report
Full-text available
“Research for the Future of our Freshwaters“ is IGB’s guiding principle. This involves giving objective and evidence-based information and advice to policymakers, authorities, associations, industry, educational institutions and the public. Within the institute’s publication series called IGB Outlines, which includes the IGB Policy Brief, IGB disse...
Article
Floods and droughts are key driving forces shaping aquatic ecosystems. Climate change may alter key attributes of these events and consequently health and distribution of aquatic species. Improved knowledge of biological responses to different types of floods and droughts in rivers should allow the better prediction of the ecological consequences o...
Article
Full-text available
Modeling of fish population developments in the context of hydropower impacts and restoration planning requires autecological information on critical life stages (especially on juvenile stages and reproduction). We compiled and examined the current data availability in peer-reviewed and grey literature on autecological requirements of ten rheophili...
Preprint
Full-text available
Humanity is facing a biodiversity crisis, with freshwater-associated biodiversity in a particularly dire state. Novel ecosystems created through human use of mineral resources, such as gravel pit lakes, can provide substitute habitats for conservation of freshwater and riparian biodiversity. However, many of these artificial ecosystems may exhibit...
Article
Full-text available
The most widespread pressure impacting river ecological status is the degradation of key hydromorphologic elements, such as sediment type and flow rate. However, almost nothing is known about the quantitative relationship between benthic invertebrate abundance and these elements. This synthesis compiles quantitative data on physical requirements an...
Article
We sampled 23 small (< 20 ha) gravel‐pit lakes (16 managed and 7 unmanaged) in north‐western Germany using littoral electrofishing and multimesh gillnets. Our objective was to compare the fish biodiversity in gravel pit lakes in the presence or absence of recreational fisheries. Given the size of the sampled lakes, we expected species poor communit...
Article
Full-text available
Resilience in river ecosystems requires that organisms must persist in the face of highly dynamic hydrological and geomorphological variations. Disturbance events such as floods and droughts are postulated to shape life history traits that support resilience, but river management and conservation would benefit from greater understanding of the emer...
Article
Longitudinal connectivity is one of the prime issues addressed in river restoration our days. At the same time, mitigation of climate change impacts by modes of renewable energy increasingly puts pressure on the remaining free flowing river stretches for hydroelectricity production. At the site level, this trade‐off manifests in the negotiation of...
Article
Full-text available
Recreational and commercial navigation is omnipresent, rendering European large rivers highways for cargo vessels, passenger ships and sport boats. Any types of motorized vessels create waves and drawdown eroding shallow shore areas. Consequently, inland navigation alters the living environment of fish with specific habitat requirements on nursing,...
Article
Large floodplain rivers (LFRs) are currently threatened by high levels of human alteration, and utilization is expected to grow. Assessments to determine ecological condition should address the specific environmental features of these unique ecosystems, while conservation management requires balancing maintenance of good ecological condition with t...
Article
Full-text available
Females can adjust their reproductive effort in relation to their partner’s perceived fitness value. In zebrafish (Danio rerio), large males are typically preferred mating partners. However, females have been observed to reduce their reproductive output with exceptionally large males but it remains unknown whether it is due to sexual harassment or...
Preprint
Full-text available
Gravel pit lakes constitute novel ecosystems that can be colonized by fishes through natural or anthropogenic pathways. Many of these man-made lakes are used by recreational anglers and experience regular fish stocking. Recreationally unmanaged gravel pits may also be affected by fish introductions, e.g., through illegal fish releases, thereby cont...
Article
Full-text available
European large rivers are exposed to multiple human pressures and maintained as waterways for inland navigation. However, little is known on the dominance and interactions of multiple pressures in large rivers and in particular inland navigation has been ignored in multi-pressure analyzes so far. We determined the response of ten fish population me...
Article
Recreational activities on, in, and along freshwaters (e.g., boating, bathing, angling) positively contribute to human well-being but can also concurrently stress aquatic ecosystems. While outdoor recreation, aquatic ecosystems, and human well-being form coupled social-ecological systems, inherent fluxes and interactions between these have rarely b...
Article
Barriers represent one of the largest anthropogenic impacts on the ecological status of rivers, and they also potentially restrict fishes' ability to respond to future environmental changes. Thus, river management aims to restore the longitudinal connectivity of rivers to allow continuous migration and movement of water, sediments and biota. Howeve...
Article
Full-text available
River restoration is a main emphasis of river management in European countries. Cross-national comparisons of its implementation are still rare in scientific literature. Based on French and German national censuses, this study compares river restoration practices and monitoring by analysing 102 French and 270 German projects. This comparison aims t...
Article
Species dispersal and population dynamics determine the spatio-temporal patterns of species spread and thus, species invasions and recolonization following habitat restorations. However, the effects of stochasticity and spatial habitat heterogeneity on species spread are poorly understood. By coupling a fish dispersal model and a population growth...
Article
Das vorliegende Buch fasst wesentliche Grundlagen des angelfischereilichen Managements („Hege“) und der Managementplanung vor dem Hintergrund aktueller wissenschaftlicher Erkenntnisse zum Thema zusammen. Das Buch entstand aus einem um einige Kapitel erweiterten Vorlesungs bzw. Seminarskript, das die Inhalte einer im Herbst 2016 an sechs Orten in De...
Article
Full-text available
Compensating for the adverse ecological impacts of waterway development and improving their ecological functioning to achieve good ecological potential (GEP) have become mandatory within the European Union (EU). The technical rehabilitation measures presented here aim to functionally minimize the hydraulic impacts of navigation on aquatic biota in...
Article
Aim: Human-induced loss of native species and introduction of non-native species have altered richness and composition of species assemblages world-wide. During the past 15 years many studies have focused on changes in taxonomic similarity and identified numerous yet often contrasting reasons for these changes. This study aims to quantify taxonomic...
Article
Full-text available
The future distribution of river fishes will be jointly affected by climate and land use changes forcing species to move in space. However, little is known if fish species will be able to keep pace with predicted climate and land use-driven habitat shifts, in particular in fragmented river networks. In this study, we coupled species distribution mo...
Article
Der Karpfen (Cyprinus carpio) gehört zu den bedeutendsten und wirtschaftlich wichtigsten Fischarten der heimischen Erwerbs- und Angelfischerei. Im Vergleich zu anderen Fischarten werden in Deutschland jährlich relativ große Karpfenmengen besetzt (Arlinghaus et al.2015), was zu einer engen Verzahnung zwischen der Teichwirtschaft und der Fangfischere...
Article
The state of knowledge on the science and management of freshwater recreational fisheries is reviewed, with the objective of integrating insights from disparate fields such as fisheries science, environmental complexity theory, common-pool-resource theory, and resilience theory. First, freshwater recreational fisheries are characterized as complex...
Article
Expert judgment is regularly used in ecology for assessing the suitability of habitats, in particular of rare or endangered species or species with limited empirical data. Yet, differences in expert judgment of habitat suitability and consequent implications for ecosystem management have not been evaluated and are largely ignored. Here, we evaluate...
Article
This study examines the improvement of juvenile fish recruitment by technical rehabilitation measures implemented in two urban waterways in Berlin, Germany: the River Spree and the Teltow Canal. Rehabilitation sites provide new littoral habitats protected from navigation-induced flow and wake wash and are intended to improve habitat quality for juv...
Article
To compensate for fairway enlargements and the hydraulic impacts of navigation activity, an artificial rehabilitation structure was constructed in the urban, navigable River Spree in 2004. This wave-protected, shallow littoral zone proved to be highly effective in reducing vessel-induced waves and provided suitable conditions for the development of...
Article
This paper is a comprehensive and updated overview of river restoration and covers all relevant aspects from drivers of restoration, linkages between hydromorphology and biota, the current restoration paradigm, effects of restorations to future directions and ways forward in the way we conduct river restoration. A large part of this paper is based...
Article
Computational fluid dynamics (CFD) has become an effective tool for assessing hydrodynamics in complex environments. This paper reports on a CFD study of navigation-induced flows in a shallow, wave-protected, littoral habitat of the urban Spree River. It was constructed as a rehabilitation structure for aquatic organisms and subject to abundant gro...
Article
Ineffectiveness of current river restoration practices hinders the achievement of ecological quality targets set by country-specific regulations. Recent advances in river restoration help planning efforts more systematically to reach ecological targets at the least costs. However, such approaches are often desktop-based and overlook realworld const...
Article
Full-text available
River ecosystems are threatened by future changes in land use and climatic conditions. However, little is known of the influence of interactions of these two dominant global drivers of change on ecosystems. Does the interaction amplify (synergism) or buffer (antagonism) the impacts and does their interaction effect differ in magnitude, direction an...