A5051216891- Fish Ecology and Management Studies
- Aquatic Invertebrate Ecology and Behavior
- Aquatic Ecosystems and Phytoplankton Dynamics
- Isotope Analysis in Ecology
- Environmental Toxicology and Ecotoxicology
- Marine and coastal ecosystems
- Freshwater macroinvertebrate diversity and ecology
- Marine Bivalve and Aquaculture Studies
- Marine Biology and Ecology Research
- Hydrology and Watershed Management Studies
- Parasite Biology and Host Interactions
- Ecology and biodiversity studies
- Myxozoan Parasites in Aquatic Species
- Aquatic Ecosystems and Biodiversity
- Hydrology and Sediment Transport Processes
- Soil and Water Nutrient Dynamics
- Biocrusts and Microbial Ecology
- Marine animal studies overview
- Bat Biology and Ecology Studies
- Fish Biology and Ecology Studies
- Integrated Water Resources Management
- Animal Ecology and Behavior Studies
- Mollusks and Parasites Studies
- Marine and fisheries research
- Marine Biology and Environmental Chemistry
University of Konstanz
2013-2024
Limnological Institute
2014
University of Potsdam
2012
This paper delivers a conceptual framework for the ecological functioning and biodiversity patterns of lakes that is based on floodpulse concept (FPC). The specific characteristics rivers considering water-level fluctuations are compared, with respect to catchment linkages, temporal patterns, hydraulic forces flooding drawdown. influences floodpulses element cycles, biodiversity, adaptations lake biota analyzed, importance multi-annual cycles highlighted. degree by which these influence...
Abstract To date, no regressions for invertebrates from lentic environments are available to facilitate biomass estimation. Predictive length–dry mass 20 freshwater invertebrate taxa a pre‐alpine lake littoral in Central Europe presented here. Regressions were calculated by fitting power function body‐length parameters. For Gammarus roeseli , the head height, an easily measurable length parameter, was used. Differences between of different confirmed analyses covariance. Equations grouped at...
Summary 1. A simulation study of the feedback phytoplankton biomass on temperature stratification in large, monomictic Lake Constance was undertaken. Phytoplankton affects light extinction coefficient (LEC) water and, turn, vertical distribution short‐wave radiation, which shapes lake. 2. sensitivity variation LEC using hydrodynamic model DYRESM showed that a high is associated with stronger stratification, shallower thermoclines, higher surface temperatures and reduced heat content during...
Summary 1. Accumulation of organic material by the zebra mussel Dreissena polymorpha is assumed to be source a biodeposition‐based food web. However, only little known about importance biodeposited as and its contribution increased abundances macroinvertebrates in presence D. . 2. Feeding, assimilation growth amphipods Gammarus roeselii Dikerogammarus villosus on sources directly indirectly associated with (biodeposited chironomids) conditioned alder leaves were measured. The stoichiometry...
Abstract Under ongoing climate change and increasing anthropogenic activity, which continuously challenge ecosystem resilience, an in-depth understanding of ecological processes is urgently needed. Lakes, as providers numerous services, face multiple stressors that threaten their functioning. Harmful cyanobacterial blooms are a persistent problem resulting from nutrient pollution climate-change induced stressors, like poor transparency, increased water temperature enhanced stratification....
Abstract The PEG (Plankton Ecology Group) model predicts differences in phenology between eutrophic and oligotrophic lakes regarding the occurrence, timing magnitude of annual chlorophyll maxima minima. While these predictions have been tested lakes, hardly any tests exist using long‐term data. We test time‐series (1980–2019) from Lake Constance which trophic status shifted to conditions. show that oligotrophication subsequently resulted reduction summer spring blooms, finally loss...
Summary 1. Since zebra mussel invaded Lake Constance in the 1960s number of wintering waterbirds increased fourfold. We studied impact predation by (tufted duck Aythya fuligula , pochard ferina and coot Fulica atra ) on population Dreissena polymorpha winter 2001/2002. These three species, with monthly peak numbers approximately 230 000 individuals, currently comprise up to 80% waterbird at Constance. 2. Four different study sites four depths, that represent typical characteristic habitats...
Summary 1. The zebra mussel ( Dreissena polymorpha ) is one of the most successful invasive species; it has colonised many aquatic systems in Europe and North America with strong impacts on various ecosystem processes. effect D. filtration pelagic seston concentrations been quantified several studies, but magnitude stoichiometry transfer sestonic biomass into benthic detritus by accompanying enrichment habitat still under‐investigated. 2. We studied biodeposition mussels two series...
This article documents the addition of 238 microsatellite marker loci and 72 pairs Single Nucleotide Polymorphism (SNP) sequencing primers to Molecular Ecology Resources Database. Loci were developed for following species: Adelges tsugae, Artemisia tridentata, Astroides calycularis, Azorella selago, Botryllus schlosseri, Botrylloides violaceus, Cardiocrinum cordatum var. glehnii, Campylopterus curvipennis, Colocasia esculenta, Cynomys ludovicianus, leucurus, gunnisoni, Epinephelus coioides,...
The Asian clam Corbicula has become established worldwide in a wide range of freshwater ecosystems. fluminea invaded Lake Constance (Central Europe) between 2000 and 2002 reached densities up to 3520 individuals >5 mm length per square meter sandy areas. However, the effect this species on other benthic invertebrates remains unclear. Here, we show that ecosystem engineering via shell production by C. considerably increases availability hard surfaces primarily soft-bottomed habitats. We...
To assess nutritional consequences associated with lake oligotrophication for aquatic consumers, we analyzed the elemental and biochemical composition of natural seston concomitantly conducted laboratory growth experiments in which freshwater key herbivore Daphnia was raised on nowadays (2008) oligotrophic Lake Constance throughout an annual cycle. Food quality mediated constraints performance were assessed by comparing somatic rates characteristics (multiple regression analysis)...
Abstract Knowledge of aquatic food resources entering terrestrial systems is important for web studies and conservation planning. Bats, among other consumers, often profit from insect emergence their activity might be closely related to such events. However, there a lack which monitor bat simultaneously with emergence, especially lakes. Thus, our aim was understand the relationship between activity, investigate whether general spatial or seasonal pattern at lakeshores. We assessed...
The dreissenids, quagga mussel Dreissena bugensis and zebra D. polymorpha, are invasive freshwater mussels in Europe North America.These species strongly impact aquatic ecosystems, such as the food web through their high abundance filtration rate.They spread quickly within between waterbodies, have ability to colonize various substrates depths.The invaded established Swiss lakes 1960s, whereas was not detected until 2014.We collected all available data from cantonal well local authorities...
Abstract The impact of Dreissena polymorpha settlement on recruitment juvenile mussels and density other macroinvertebrates was studied in field experiments using blank concrete blocks tiles (control), with attached empty zebra mussel shells, living mussels. On blocks, dominant invertebrate taxa showed colonization patterns coinciding increased habitat complexity owing to or the biodeposition faeces pseudofaeces. Adult especially preferred shells mussels; this might possibly be caused by a...
It has been repeatedly suggested that parasites play an important role in the ecology and evolution of Daphnia populations; however, little is known about —parasite interactions lakes with vertebrate predation on . Between September 1997 April 1998, epidemic protist parasite Caullerya mesnili galeata hyalina occurred Lake Constance (Germany), infecting up to 50% all individuals. Using laboratory experiments, we investigated epidemiological between this its host D. at individual population...
Stable isotope and fatty acid signatures of biomaterials can provide important information about the dietary niche animals. differ between aquatic terrestrial food webs, therefore be used to assess contributions diets species. We studied faecal samples three co-occurring bat species with known differences in feeding preferences. The aim was whether stable faeces determine because they easily non-invasively collected. hypothesised that will reveal terrestrial, mixed niches Myotis myotis, M....
The spatial and temporal organisation of benthic invertebrate communities was studied in a large oligotrophic lake central Europe. Three shallow littoral sites at 0.4 m depth were sampled monthly from May 2002 to April 2003. On scale, the community composition all samplings significantly differed both abundance biomass. gradually changed each month; samples always differed, but consecutive months more similar other than non-consecutive months. observed variability within corresponded with...
In the last decades, zebra mussels (Dreissena polymorpha) have invaded many freshwater systems with severe consequences for entire communities. Most benthic macroinvertebrates, especially amphipods and chironomids, increase in abundance presence of mussels. Increased structural complexity an unknown biotic factor lead to this effect. Dreissena-associated factors that might influence populations native Gammarus roeselii invader Dikerogammarus villosus Lake Constance, Central Europe, were...
Abstract Analyses of the effects extreme climate periods have been used as a tool to predict ecosystem functioning and processes in warmer world. The winter half‐year 2006/2007 (w06/07) has extremely warm was estimated be half‐a‐millennium event central Europe. Here we analyse consequences w06/07 for temperatures, mixing dynamics, phenologies population developments algae daphnids (thereafter limnology) deep European lake investigate what extent analysis limnology can really predictive...