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Perturbations linked to the direct and indirect impacts of human activities during the Anthropocene affect the structure and functioning of aquatic ecosystems to varying degrees. Some perturbations involve stress to aquatic life, including soil and water acidification, soil erosion, loss of base cations, release of trace metals/organic compounds, and application of essential nutrients capable of stimulating primary productivity. Superimposed onto these changes, climate warming impacts aquatic environments via altering species’ metabolic processes and by modifying food web interactions. The interaction stressors is difficult to predict because of the differential response of species and taxonomic groups, interacting additively, synergistically, or antagonistically. Whenever different trophic levels respond differently to climate warming, food webs are restructured; yet, the consequences of warming-induced changes for the food web structure and long-term population dynamics of different trophic levels remain poorly understood. Such changes are crucial in lakes, where food web production is mainly due to ectotherms, which are highly sensitive to changes in their surrounding environment. Due to its remarkable physical inertia, including thermal stability, global warming also has a profound effect on groundwater ecosystems. Combining contemporary and palaeo data is essential to understand the degree to which mechanisms of stressors impact on lake biological communities and lake ecosystem functioning. The degree to which alterations can affect aquatic ecosystem structure and functioning also requires functional diversity to be addressed at the molecular level, to reconstruct the role different species play in the transfer of material and energy through the food web. In this issue, we present examples of the impact of different stressors and their interaction on aquatic ecosystems, providing long-term, metabolic, molecular, and paleolimnological analyses.
multivariate analyses --- risk assessment --- aquatic insects --- crustaceans --- lab-microcosms --- nonmetric multidimensional scaling --- adaptation --- porous aquifer --- PERMANOVA --- Planktothrix rubescens --- species conservation --- distribution patterns of species --- Cyanobacteria --- fossil Cladocera --- high throughput sequencing --- machine learning model --- stability --- small lakes --- environmental factor --- non-metric multi-dimensional scaling (NMDS) --- stream ecosystem --- lake vulnerability --- PCA --- functional diversity --- ecological resilience --- nitrification --- deep lake --- metabolism --- South–North Water Diversion Project --- endemic species --- EPT taxa --- trophic interactions --- stable isotope analysis --- environmental change --- bioassessment --- generalized procrustes analysis --- freshwater pollution --- colonization --- paleolimnology --- Tychonema bourrellyi --- plankton --- subalpine lakes --- random forest model --- Danjiangkou Reservoir --- trophic degree --- multiple scale --- biodiversity --- copepods --- zooplankton --- groundwater --- genetic variability --- respirometry --- ammonium impact --- Stable Isotopes Analysis --- trophic gradient --- seasonality
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At present, cyanobacteria and their toxins (also known as cyanotoxins) constitute a major threat for freshwater resources worldwide. Cyanotoxin occurrence in water bodies around the globe is constantly increasing, whereas emerging, less studied or completely new variants and congeners of various chemical classes of cyanotoxins, as well as their degradation/transformation products are often detected. In addition to planctic cyanobacteria, benthic cyanobacteria, in many cases, appear to be important toxin producers, although far less studied and more difficult to manage and control. This Special Issue highlights novel research results on the structural diversity of cyanotoxins from planktic and benthic cyanobacteria, as well as on their expanding global geographical spread in freshwaters.
Research & information: general --- Environmental economics --- Meiktila Lake --- Raphidiopsis --- Microcystis --- cylindrospermopsin --- deoxycylindrospermopsin --- microcystin --- cyanobacteria --- cyanopeptides --- harmful bloom --- liquid chromatography-tandem mass spectrometry --- global natural product social networking (GNPS) --- dereplication strategy --- earthquakes --- harmful algal blooms --- sediment --- sediment cores --- co-occurrence --- toxicity --- plastics --- metals --- biocide --- anatoxin-a --- dihydroanatoxin-a --- Tychonema --- neurotoxicosis --- cyanotoxins --- macrophytes --- benthic --- tychoplanktic --- reservoir --- Maumee Bay --- Sandusky Bay --- Planktothrix --- anatoxin --- cyanotoxin detection --- harmful cyanobacterial blooms --- next-generation biomonitoring --- real-time PCR --- qPCR --- LC-MS/MS --- saxitoxin --- ESI-LC-MS/MS --- 16S rRNA phylogeny --- Azores --- eutrophication --- long term monitoring --- water quality --- microcystins --- anabaenopeptins --- microginins --- aeruginosins --- aeruginosamide --- SPE --- Lake Vegoritis --- deep-chlorophyll layers (DCLs) --- cyanobacterial toxins --- allelopathy --- bioactive metabolites --- hypoxia --- Georgian Bay --- peptide --- NRPS --- anabaenopeptin --- Synechococcus --- temperate lakes --- cyanotoxins (CTs) --- microcystins (MCs) --- volatile organic compounds (VOCs) --- taste and odor (T&O) compounds --- SPE-LC-MS/MS --- HS-SPME-GC/MS --- LC–qTRAP MS/MS --- fragmentation spectra --- structure elucidation --- cyanobacterial metabolites --- Greek freshwaters --- planktonic cyanobacteria --- blooms --- monitoring --- analysis --- mass spectrometry --- Liquid Chromatography with tandem mass spectrometry (LC-MS/MS) --- fish tissue --- shellfish --- detection methods --- n/a --- LC-qTRAP MS/MS
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At present, cyanobacteria and their toxins (also known as cyanotoxins) constitute a major threat for freshwater resources worldwide. Cyanotoxin occurrence in water bodies around the globe is constantly increasing, whereas emerging, less studied or completely new variants and congeners of various chemical classes of cyanotoxins, as well as their degradation/transformation products are often detected. In addition to planctic cyanobacteria, benthic cyanobacteria, in many cases, appear to be important toxin producers, although far less studied and more difficult to manage and control. This Special Issue highlights novel research results on the structural diversity of cyanotoxins from planktic and benthic cyanobacteria, as well as on their expanding global geographical spread in freshwaters.
Meiktila Lake --- Raphidiopsis --- Microcystis --- cylindrospermopsin --- deoxycylindrospermopsin --- microcystin --- cyanobacteria --- cyanopeptides --- harmful bloom --- liquid chromatography-tandem mass spectrometry --- global natural product social networking (GNPS) --- dereplication strategy --- earthquakes --- harmful algal blooms --- sediment --- sediment cores --- co-occurrence --- toxicity --- plastics --- metals --- biocide --- anatoxin-a --- dihydroanatoxin-a --- Tychonema --- neurotoxicosis --- cyanotoxins --- macrophytes --- benthic --- tychoplanktic --- reservoir --- Maumee Bay --- Sandusky Bay --- Planktothrix --- anatoxin --- cyanotoxin detection --- harmful cyanobacterial blooms --- next-generation biomonitoring --- real-time PCR --- qPCR --- LC-MS/MS --- saxitoxin --- ESI-LC-MS/MS --- 16S rRNA phylogeny --- Azores --- eutrophication --- long term monitoring --- water quality --- microcystins --- anabaenopeptins --- microginins --- aeruginosins --- aeruginosamide --- SPE --- Lake Vegoritis --- deep-chlorophyll layers (DCLs) --- cyanobacterial toxins --- allelopathy --- bioactive metabolites --- hypoxia --- Georgian Bay --- peptide --- NRPS --- anabaenopeptin --- Synechococcus --- temperate lakes --- cyanotoxins (CTs) --- microcystins (MCs) --- volatile organic compounds (VOCs) --- taste and odor (T&O) compounds --- SPE-LC-MS/MS --- HS-SPME-GC/MS --- LC–qTRAP MS/MS --- fragmentation spectra --- structure elucidation --- cyanobacterial metabolites --- Greek freshwaters --- planktonic cyanobacteria --- blooms --- monitoring --- analysis --- mass spectrometry --- Liquid Chromatography with tandem mass spectrometry (LC-MS/MS) --- fish tissue --- shellfish --- detection methods --- n/a --- LC-qTRAP MS/MS
Choose an application
At present, cyanobacteria and their toxins (also known as cyanotoxins) constitute a major threat for freshwater resources worldwide. Cyanotoxin occurrence in water bodies around the globe is constantly increasing, whereas emerging, less studied or completely new variants and congeners of various chemical classes of cyanotoxins, as well as their degradation/transformation products are often detected. In addition to planctic cyanobacteria, benthic cyanobacteria, in many cases, appear to be important toxin producers, although far less studied and more difficult to manage and control. This Special Issue highlights novel research results on the structural diversity of cyanotoxins from planktic and benthic cyanobacteria, as well as on their expanding global geographical spread in freshwaters.
Research & information: general --- Environmental economics --- Meiktila Lake --- Raphidiopsis --- Microcystis --- cylindrospermopsin --- deoxycylindrospermopsin --- microcystin --- cyanobacteria --- cyanopeptides --- harmful bloom --- liquid chromatography-tandem mass spectrometry --- global natural product social networking (GNPS) --- dereplication strategy --- earthquakes --- harmful algal blooms --- sediment --- sediment cores --- co-occurrence --- toxicity --- plastics --- metals --- biocide --- anatoxin-a --- dihydroanatoxin-a --- Tychonema --- neurotoxicosis --- cyanotoxins --- macrophytes --- benthic --- tychoplanktic --- reservoir --- Maumee Bay --- Sandusky Bay --- Planktothrix --- anatoxin --- cyanotoxin detection --- harmful cyanobacterial blooms --- next-generation biomonitoring --- real-time PCR --- qPCR --- LC-MS/MS --- saxitoxin --- ESI-LC-MS/MS --- 16S rRNA phylogeny --- Azores --- eutrophication --- long term monitoring --- water quality --- microcystins --- anabaenopeptins --- microginins --- aeruginosins --- aeruginosamide --- SPE --- Lake Vegoritis --- deep-chlorophyll layers (DCLs) --- cyanobacterial toxins --- allelopathy --- bioactive metabolites --- hypoxia --- Georgian Bay --- peptide --- NRPS --- anabaenopeptin --- Synechococcus --- temperate lakes --- cyanotoxins (CTs) --- microcystins (MCs) --- volatile organic compounds (VOCs) --- taste and odor (T&O) compounds --- SPE-LC-MS/MS --- HS-SPME-GC/MS --- LC-qTRAP MS/MS --- fragmentation spectra --- structure elucidation --- cyanobacterial metabolites --- Greek freshwaters --- planktonic cyanobacteria --- blooms --- monitoring --- analysis --- mass spectrometry --- Liquid Chromatography with tandem mass spectrometry (LC-MS/MS) --- fish tissue --- shellfish --- detection methods
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