A5059435859- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Aquatic Ecosystems and Phytoplankton Dynamics
- Fish Ecology and Management Studies
- Ocean Acidification Effects and Responses
- Environmental DNA in Biodiversity Studies
- Protist diversity and phylogeny
- Aquatic Invertebrate Ecology and Behavior
- Isotope Analysis in Ecology
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Diatoms and Algae Research
- Coral and Marine Ecosystems Studies
- Water Quality Monitoring and Analysis
- Water Quality Monitoring Technologies
- Marine Toxins and Detection Methods
- Species Distribution and Climate Change
- Freshwater macroinvertebrate diversity and ecology
- Environmental Toxicology and Ecotoxicology
- Metabolomics and Mass Spectrometry Studies
- Marine and coastal plant biology
- Soil and Water Nutrient Dynamics
- Impact of Light on Environment and Health
- Algal biology and biofuel production
Leibniz Institute of Freshwater Ecology and Inland Fisheries
2016-2025
Berlin Brandenburg Institute of Advanced Biodiversity Research
2018-2025
Forschungsverbund Berlin
2021-2023
Berlin Center for Genomics in Biodiversity Research
2018-2023
Limnological Institute
2023
National Center for Ecological Analysis and Synthesis
2021
Universidade Federal do Paraná
2021
Helmholtz Centre for Environmental Research
2021
Leibniz Centre for Agricultural Landscape Research
2021
University of Georgia
2013-2017
Abstract Global pressures on freshwater ecosystems are high and rising. Viewed primarily as a resource for humans, current practices of water use have led to catastrophic declines in species the degradation ecosystems, including their genetic functional diversity. Approximately three‐quarters world's inland wetlands been lost, one‐third 28 000 assessed International Union Conservation Nature (IUCN) Red List threatened with extinction, vertebrate populations undergoing that more rapid than...
Global freshwater biodiversity is declining dramatically, and meeting the challenges of this crisis requires bold goals mobilisation substantial resources. While reasons are varied, investments in both research conservation lag far behind those terrestrial marine realms. Inspired by a global consultation, we identify 15 pressing priority needs, grouped into five areas, an effort to support informed stewardship biodiversity. The proposed agenda aims advance globally as critical step improving...
Rapid and drastic anthropogenic impacts are affecting global biogeochemical processes driving biodiversity loss across Earth's ecosystems. In aquatic ecosystems, species distributions shifting, abundances of many have declined dramatically, threatened with extinction. addition to diversity, the ecosystem functions, services on which humans depend also being heavily impacted. Addressing these challenges not only requires direct action mitigate environmental but innovative approaches identify,...
We studied the direct effects of CO2 and related changes in seawater carbonate chemistry on marine planktonic organisms a mesocosm experiment. In nine outdoor enclosures (~11 m3 each), partial pressure (pCO2) was modified by an aeration system. The triplicate treatments represented low (~190 parts per million volume (ppmV) CO2), present (~410 ppmV high (~710 CO2) pCO2 conditions. After initial fertilization with nitrate phosphate bloom dominated coccolithophorid Emiliania huxleyi occurred...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 147:197-217 (1997) - doi:10.3354/meps147197 Feeding and reproduction by Calanus finmarchicus, microzooplankton grazing during mesocosm blooms of diatoms coccolithophore Emiliania huxleyi Nejstgaard JC, Gismervik I, Solberg PT The aim this study was quantify zooplankton feeding interactions copepod flagellates...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 221:59-75 (2001) - doi:10.3354/meps221059 Correcting for underestimation of microzooplankton grazing in bottle incubation experiments with mesozooplankton Jens C. Nejstgaard1,*, Lars-Johan Naustvoll2, Andrey Sazhin3 1Department Fisheries and Biology, University Bergen, Bergen High Technology Center, PO Box...
Confl~chng data have been previously presented on the ablllty of copepods to prey upon prymneslophyte Phaeocystls pouchetu Whde some suggested that gelatinous colonies thls species c o n t a blochemlcal substances prevent h e ~r consumption others shown both slngle cells and colon~es P can serve as an excellent food source The present study presents from feedlng expenments uslng 4 specles natural samples phytoplankton south-north transect dunng May 1989 in Barents Sea Natural contalned...
Abstract In order to characterize copepod feeding in relation microbial plankton community dynamics, we combined metabarcoding and metabolome analyses during a 22‐day seawater mesocosm experiment. Nutrient amendment of mesocosms promoted the development haptophyte ( Phaeocystis pouchetii )‐ diatom Skeletonema marinoi )‐dominated communities mesocosms, which Calanus sp. copepods were incubated for 24 h flow‐through chambers allow access prey particles (<500 μm). Copepods water sampled six...
Extreme weather events can pervasively influence ecosystems. Observations in lakes indicate that severe storms particular have pronounced ecosystem-scale consequences, but the underlying mechanisms not been rigorously assessed experiments. One major effect of on is redistribution mineral resources and plankton communities as a result abrupt thermocline deepening. We aimed at elucidating importance this by mimicking replicated large enclosures (each 9 m diameter, ca. 20 deep, 1300 m3 volume)...
Eutrophication of inland waters is an environmental issue that becoming more common with climatic variability. Monitoring this aquatic problem commonly based on the chlorophyll-a concentration monitored by routine sampling limited temporal and spatial coverage. Remote sensing data can be used to improve monitoring, especially after launch MultiSpectral Instrument (MSI) Sentinel-2. In study, we compared estimation (chl-a) from different bio-optical algorithms using hyperspectral proximal...
Abstract Phytoplankton responses to nutrient enrichment are often assumed be universal, but in practice they can significantly vary because the effect size an increased supply of one may depend on availability other. Here, we used two complementary two‐way factorial experiments determine how lake phytoplankton N and P with increasing concentrations other nutrient. We manipulated dissolved a 4‐d bioassay conducted measured/determined chlorophyll carbon (C)‐specific growth rates, size‐classes,...
Abstract Lakes worldwide are affected by multiple stressors, including climate change. This includes massive loading of both nutrients and humic substances to lakes during extreme weather events, which also may disrupt thermal stratification. Since multi‐stressor effects vary widely in space time, their combined ecological impacts remain difficult predict. Therefore, we two consecutive large enclosure experiments with a comprehensive time‐series broad‐scale field survey unravel the...
Aquatic food webs are affected from the bottom up by light through its effect on photosynthesis and productivity. But also has a top‐down effect, because it is crucial for visual foraging efficiency in many fish. Here we present data suggesting that marine pelagic primarily structured vision For light‐limited fjord ecosystems, show abundance of zooplanktivorous fish proportional to vertical extension feeding habitat, represented inverse absorbance coefficient water column. We both...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 221:77-91 (2001) - doi:10.3354/meps221077 Zooplankton growth, diet and reproductive success compared in simultaneous diatom- flagellate-microzooplankton-dominated plankton blooms Jens C. Nejstgaard1,*, Bent Hansen Hygum2, Lars-Johan Naustvoll3, Ulf Båmstedt1 1Department of Fisheries Biology, University...
Abstract. Increasing atmospheric carbon dioxide (CO2) concentrations due to anthropogenic fossil fuel combustion are currently changing the ocean's chemistry. oceanic [CO2] and consequently decreasing seawater pH have potential significantly impact marine life. Here we describe analyze build-up decline of a natural phytoplankton bloom initiated during 2005 mesocosm Pelagic Ecosystem CO2 Enrichment study (PeECE III). The draw-down inorganic nutrients in upper surface layer mesocosms was...
Quantification of feeding rates and selectivity zooplankton is vital for understanding the mechanisms structuring marine ecosystems. However, methodological limitations have made many these studies difficult. Recently, molecular based methods demonstrated that DNA from prey species can be used to identify gut contents, further, quantitative content estimates by PCR (qPCR) assays targeted 18S rRNA gene been estimate in appendicularians copepods. while standard single primer qPCR were filter...
Abstract. Microzooplankton grazing and algae growth responses to increasing pCO2 levels (350, 700 1050 μatm) were investigated in nitrate phosphate fertilized mesocosms during the PeECE III experiment 2005. Grazing rates estimated by dilution technique combined with taxon specific HPLC pigment analysis. composition was determined light microscopy. Despite a range of up 3 times present CO2 levels, there no clear differences any measured parameter between different treatments. During days 3–9...