Andreas Bruder

Andreas Bruder
University of Applied Sciences and Arts of Southern Switzerland · Department for Environment Constructions and Design

PhD

About

88
Publications
36,155
Reads
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2,173
Citations
Citations since 2017
61 Research Items
1753 Citations
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Introduction
I'm studying aquatic microbial ecology in streams and alpine catchments with a food-web perspective and a focus on aquatic fungi and insects. I use the knowledge generated during these studies for the development of novel molecular and functional indicators to help understanding and mitigating the consequences of environmental change on aquatic ecosystem functioning.
Additional affiliations
August 2019 - present
University of Geneva
Position
  • Coordinator and Teacher
Description
  • Course 14B026 "Molecular Microbial Ecology". Classroom teaching, fieldwork and microscopy on stream fungi and diatoms (40h per term, in English).
February 2019 - present
Zurich University of Applied Sciences
Position
  • Teacher
Description
  • Teaching in the Module "Freshwater Ecology and Restoration". Classroom teaching (2h per term, in German).
February 2018 - present
University of Applied Sciences and Arts of Southern Switzerland
Position
  • Researcher
Description
  • Applied aquatic microbial ecology in streams and alpine catchments with a food-web perspective and a focus on aquatic fungi and insects.

Publications

Publications (88)
Article
Full-text available
Multiple stressors are increasingly affecting organisms and communities, thereby modifying ecosystems' state and functioning. Raising awareness about the threat from multiple stressors has increased the number of experimental and observational studies specifically addressing consequences of stressor interactions on biota. Most studies measure the d...
Article
Protein fingerprinting using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-­TOF MS) is a rapid, reliable, and economical method to characterize isolates of terrestrial fungi and other microorganisms. The objective of our study was to evaluate the suitability of MALDI-TOF MS for the identification of aquatic hyp...
Article
Agricultural land use results in multiple stressors affecting stream ecosystems. Flow reduction due to water abstraction, elevated levels of nutrients and chemical contaminants are common agricultural stressors worldwide. Concurrently, stream ecosystems are also increasingly affected by climate change. Interactions among multiple co-occurring stres...
Article
Hydropower plants are an important source of renewable energy. In the near future, high-head storage hydropower plants will gain further importance as a key element of large-scale electricity production systems. However, these power plants can cause hydropeaking which is characterized by intense unnatural discharge fluctuations in downstream river...
Article
1. The current rapid decline in biodiversity has led to concerns about the consequences for stream ecosystem processes, one of which is the decomposition of leaf litter derived from riparian vegetation. 2. We conducted field experiments in a tropical and a temperate stream to test for the effects of mixing leaf species differing in resource quality...
Article
Full-text available
Using multimetric indices (MMIs) for monitoring the ecosystem health of rivers is common practice. Increasing the applicability of MMIs needs understanding of the impacts of natural spatial and temporal variability on community structure in relation to effects of anthropogenic pressure gradients. In this study, we tested the impact of seasonal vari...
Preprint
Full-text available
We assessed the distribution of alien fishes in one of the most ecologically and economically important aquatic ecosystems in Iran, the Karun River Basin. Fish samples were collected from 35 sites in the Karun River Basin during the low-flow period from November to December 2018. We documented the occurrence of 37 species of fishes from nine orders...
Article
Full-text available
Headwater streams harbor diverse macroinvertebrate communities and are hotspots for leaf litter breakdown. The process of leaf litter breakdown mediated by macroinvertebrates forms an important link between terrestrial and aquatic ecosystems. Yet, how the vegetation type in the local riparian zone influences leaf-associated macroinvertebrate assemb...
Presentation
Full-text available
In spring 2019, streams in the Karun River catchment, the biggest river in Iran, experienced three major waves of rain within two weeks, which resulted in extreme floods. Floods generate natural disturbance in river systems, promoting fluvial dynamics and sustaining eco-morphological processes. Macroinvertebrates play a key role in fluvial ecosyste...
Article
Full-text available
We analyzed spatial variation in fish species richness and community composition in the Karun River basin, Iran. Knowledge about fish diversity in the basin is incomplete and varies widely along spatial and temporal scales: The Karun is the longest river in Iran (950 km) with the largest drainage area (about 67,000 km 2). Fish samples were collecte...
Article
Full-text available
Water quality indices use biological, chemical, and physical data and information to classify the condition of surface waters, ultimately contributing to their management. We used multicollinearity and principal components analyses to develop the Revised Iranian Water Quality Index (RIWQI) as an indicator of agricultural and urban effects in the Ka...
Presentation
Full-text available
Incorporating functional diversity indices to enhance the performance of MMIs Worldwide, freshwater ecosystems are impacted by multiple stressors, causing ecological degradation and reducing biodiversity. Traditionally, biomonitoring of freshwater ecosystems is based on taxonomic indices of biotic communities, but incorporating functional diversity...
Article
Full-text available
The most robust approach to ecological monitoring and assessment is the use of regionally calibrated indicators. These should be calculated based on collocated biological (response) and physicochemical (stressor) variables and an objective rating and scoring system. In developing countries, a frequent lack of financial and technical resources for m...
Article
The study of community structure changes in relation to environmental gradients can help assessing and predicting community response to anthropogenic disturbances; however, such types of studies are rare in semi-arid regions. This study aimed at investigating the macroinvertebrate community composition in response to environmental variables in rive...
Article
Full-text available
Microbes play a critical role in plant litter decomposition and influence the fate of carbon in rivers and riparian zones. When decomposing low‐nutrient plant litter, microbes acquire nitrogen (N) and phosphorus (P) from the environment (i.e., nutrient immobilization), and this process is potentially sensitive to nutrient loading and changing clima...
Article
Full-text available
Latin America’s tremendous socio-cultural and biological diversity has evolved along tightly intertwined, far-reaching river networks. Decisions taken by any one country, may have strong impacts on the regional and even global biodiversity conservation agenda, such as the Convention on Biological Diversity. Here we comment on four perspectives comp...
Article
Full-text available
Large river systems are one of the most important water resources for human societies. However, the ecological integrity of large rivers has been altered greatly by human activities. To monitor and manage these ecosystems, multimetric indices (MMI) are considered as efficient tools. This study aimed to develop and validate a fish-based multimetric...
Article
A physical, chemical and biological characterization of river systems is needed to evaluate their ecological quality and support restoration programs. Herein, we describe an approach using water chemistry, physical structure and land use for identification of a disturbance gradient existing in the Karun River Basin. For this purpose, at each site,...
Article
Full-text available
Exploitation of hydropower potential in alpine areas undermines the ecological integrity of rivers. Damming and water abstraction substantially alter the physical habitat template of rivers, with strong repercussions on aquatic communities and their resources. Tools are needed to predict and manage the consequences of these alterations on the struc...
Conference Paper
Full-text available
Multimetric indices (MMI) are an efficient tool to describe human impacts on macroinvertebrate communities across large spatial scales. However, their performance might differ among seasons due to biological changes of the communities and changes in environmental conditions or human impacts. In this study, we developed and tested an MMI for macroin...
Article
Environmental policies fall short in protecting freshwater ecosystems, which are heavily threatened by human pressures and their associated stressors. One reason is that stressor effects depend on the context in which they occur and it is difficult to extrapolate patterns to predict the effect of stressors without these being contextualized in a ge...
Chapter
The decomposition of plant litter in freshwaters is an integrative process involving multiple organism groups and connecting terrestrial and freshwater ecosystems. The quantification of leaf litter decomposition has been advocated as an effective indicator of ecosystem functional integrity in the bioassessment of freshwaters. Indeed, variation in l...
Preprint
Full-text available
Latin America’s tremendous socio-cultural and biological diversity has evolved along tightly intertwined, far-reaching river networks. Decisions taken by any one country, may have strong impacts on the regional and even global biodiversity conservation agenda, such as the Convention on Biological Diversity. Here we propose and illustrate four persp...
Research
Full-text available
Environmental policies fall short in protecting freshwater ecosystems, which are heavily threatened by human pressures and their associated stressors. One reason is that stressor effects depend on the context in which they occur and it is difficult to extrapolate patterns to predict the effect of stressors without these being contextualized in a ge...
Article
Full-text available
Length-weight relationships (LWR) for seven species from the Karun River system in Iran were provided. These species include Alburnus doriae, Alburnus sellal, Barbus karunensis, Capoeta coadi, Squalius berak, Turcinoemacheilus saadii and Rhinogobius lindberg. Fishes were collected in November and December 2018 and LWR is based on total length and w...
Conference Paper
Full-text available
The Karun River, western Iran, is the largest (catchment area of 57’059 km2) and the only navigable river system in Iran. It flows westwards out of the Zagros mountain range (max. altitude 4409 m.a.s.l.), traverses the Khuzestan plain, and joins the Shatt al-Arab, which then enters the Persian Gulf. The freshwater ecosystems of the Karun are affect...
Article
Full-text available
The ABCD conference format (All continents, Balanced gender, low Carbon transport, Diverse backgrounds) mixes live-streamed and pre-recorded talks with in-person ones to reflect a diverse range of viewpoints and reduce the environmental footprint of meetings while also lowering barriers to inclusiveness.
Article
Full-text available
Intermittent rivers and ephemeral streams (IRES) may represent over half the global stream network, but their contribution to respiration and carbon dioxide (CO2) emissions is largely undetermined. In particular, little is known about the variability and drivers of respiration in IRES sediments upon rewetting, which could result in large pulses of...
Article
Agricultural practices often result in multiple stressors affecting stream ecosystems, and interacting stressors complicate environmental assessment and management of impacted streams. The nitrification inhibitor dicyandiamide (DCD) is used for nitrogen management on farmland. Effects of leached DCD on stream ecosys- tems are still largely unstudie...
Article
Climate change and human pressures are changing the global distribution and the extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico‐chemical changes (preconditioning), and...
Article
Full-text available
The Earth’s subsurface represents a complex electrochemical environment that contains many electro-active chemical compounds that are relevant for a wide array of biologically driven ecosystem processes. Concentrations of many of these electro-active compounds within Earth’s subsurface environments fluctuate during the day and over seasons. This ha...
Article
Full-text available
The Earth's subsurface represents a complex electrochemical environment that contains many electro-active chemical compounds that are relevant for a wide array of biologically driven ecosystem processes. Concentrations of many of these electro-active compounds within Earth's subsurface environments fluctuate during the day and over seasons. This ha...
Article
Global patterns of biodiversity have emerged for soil microorganisms, plants and animals, and the extraordinary significance of microbial functions in ecosystems is also well established. Virtually unknown, however, are large-scale patterns of microbial diversity in freshwaters, although these aquatic ecosystems are hotspots of biodiversity and bio...
Article
Full-text available
River ecosystems receive and process vast quantities of terrestrial organic carbon, the fate of which depends strongly on microbial activity. Variation in and controls of processing rates, however, are poorly characterized at the global scale. In response, we used a peer-sourced research network and a highly standardized carbon processing assay to...
Article
Full-text available
Climate change and human pressures are changing the global distribution and extent of intermittent rivers and ephemeral streams (IRES), which comprise half of the global river network area. IRES are characterized by periods of flow cessation, during which channel substrates accumulate and undergo physico‐chemical changes (preconditioning), and peri...
Conference Paper
Full-text available
Extended abstract of the keynote presentation entitled "Ecology of aquatic hyphomycetes and the role of biodiversity" at the International Conference on Mycology in Ismailia, Egypt organized by the Arab Society of Fungal Conservation
Article
Full-text available
Perennial rivers and streams make a disproportionate contribution to global carbon (C) cycling. However, the contribution of intermittent rivers and ephemeral streams (IRES),which sometimes cease to flow and can dry completely, is largely ignored although theymay represent over half the global river network. Substantial amounts of terrestrialplant...
Article
Full-text available
In the version of this Article originally published, the affiliation for M. I. Arce was incorrect; it should have been: ⁵Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany. This has now been corrected in the online versions of the Article.
Article
Interactions among multiple anthropogenic stressors threaten freshwater fish and pose challenges for fisheries management and conservation. Previous studies of multiple‐stressor effects on freshwater fish suggest a prevalence of antagonistic interactions. However, taxonomy, life stage and/or environmental context likely modify the magnitude and dir...
Data
Print version of the meeting report. Earth & Space Science News 99(6)
Article
Full-text available
Summary of the LimnoAlp Workshop at Lake Cadagno, Switzerland, 10–15 September 2017 https://eos.org/meeting-reports/winter-conditions-are-changing-rapidly-in-alpine-lake-ecosystems
Article
The deposition of atmospheric pollutants on ecosystems is a key environmental issue, especially in the southern slopes of the Swiss Alps, which receive substantial inputs of pollutants from the Po valley, Italy. High-alpine catchments are particularly sensitive to atmospheric pollutants but also to other current environmental issues including clima...
Presentation
Full-text available
The Stream Ecology Research Group at Otago University has won the ”River Story Award” at the 2017 New Zealand River Awards. A 3.5 min video made by the Cawthron Foundation tells a story about the multiple-stressor research done since 2007 in the ExStream System, an innovative research facility delevoped by Jay Piggott and Christoph Matthaei. The vi...
Article
Full-text available
Although primary production (i.e., the carbon fixed by autotrophs through photosynthesis) is assessed extensively by limnologists, its measurement presents methodological challenges. The objectives of this study were to (1) address some of these challenges by proposing an improvement to current mathematical models used to calculate cumulative (e.g....
Conference Paper
Full-text available
Mountain lakes and their catchments of the Alpine cryosphere are facing global pressures including climate warming and deposition of atmospheric pollutants. Due to their remoteness, often low buffer capacities and sensitive biotic communities, alpine lake catchments are particularly well suited as sentinels of environmental change. Lago Nero is the...
Article
Full-text available
Disentangling the individual and interactive effects of multiple stressors on microbial communities is a key challenge to our understanding and management of ecosystems. Advances in molecular techniques allow studying microbial communities in situ and with high taxonomic resolution. However, the taxonomic level which provides the best trade-off bet...
Conference Paper
Full-text available
Alpine environments are facing global pressures including climate warming and deposition of air pollutants. The southern slope of the Central Alps (including Canton Ticino, Switzerland) is highly affected, due to its proximity to the heavily industrialised Po Valley, Italy. For example, in Canton Ticino, atmospheric deposition of nitrogen (N) ranks...
Poster
Full-text available
Growing trends in global energy demand and the dramatic projections of climate change scenarios have increased the importance of renewable energy sources in the last decades. In this context hydropower plays a major role. Hydropower provides society with undeniable benefits but it is burdened by a long list of drawbacks that heavily impact stream e...
Article
Full-text available
How are resource consumption and growth rates of litter-consuming detritivores affected by imbalances between consumer and litter C:N:P ratios? To address this question, we offered leaf litter as food to three aquatic detritivore species, which represent a gradient of increasing body N:P ratios: a crustacean, a caddisfly, and a stonefly. The detrit...
Article
Agricultural land use commonly exerts multiple stressors on the functioning of stream ecosystems, including leaf litter decomposition and the utilization of this resource in stream food webs. If stressors interact, their cumulative effects on biotic responses cannot be predicted from knowledge of individual stressor effects, posing challenges for m...
Conference Paper
Full-text available
Note: A manuscript based on this conference presentation is currently in revision in Scientific Reports. Recent advances in molecular techniques allow studying entire microbial communities in their environment, with a resolution down to Operational Taxonomic Units (OTUs). Should we therefore investigate OTUs, or can we simply look at common phyla?...
Article
Plant litter breakdown is a key ecological process in terrestrial and freshwater ecosystems. Streams and rivers, in particular, contribute substantially to global carbon fluxes. However, there is little information available on the relative roles of different drivers of plant litter breakdown in fresh waters, particularly at large scales. We presen...
Article
Many forested headwater streams are heterotrophic ecosystems in which allochthonous inputs of plant litter are a major source of energy. Leaves of riparian vegetation entering the stream are broken down by a combination of biotic and abiotic processes and, in most temperate and boreal streams, provide food and habitat for dense populations of detri...