James B. Cotner
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View article: Metabolic biochemical models of N <sub>2</sub> fixation for sulfide oxidizers, methanogens, and methanotrophs
Metabolic biochemical models of N <sub>2</sub> fixation for sulfide oxidizers, methanogens, and methanotrophs Open
Dinitrogen (N 2 ) fixation provides bioavailable nitrogen to the biosphere. However, in some habitats (e.g., sediments), the metabolic pathways of organisms carrying out N 2 fixation are unclear. We present metabolic models representing va…
View article: Internal processing and N2 balance in Upper Midwest lakes across a land use gradient
Internal processing and N2 balance in Upper Midwest lakes across a land use gradient Open
View article: The influence of mixing on seasonal carbon dioxide and methane fluxes in ponds
The influence of mixing on seasonal carbon dioxide and methane fluxes in ponds Open
Inland waters are important sources of the greenhouse gases carbon dioxide (CO2) and methane (CH4). Ponds have amongst the highest CO2 and CH4 fluxes of all aquatic ecosystems, yet seasonal variation in fluxes remain poorly characterized, …
View article: Freshwater Biogeochemical Hotspots: High Primary Production and Ecosystem Respiration in Shallow Waterbodies
Freshwater Biogeochemical Hotspots: High Primary Production and Ecosystem Respiration in Shallow Waterbodies Open
Ponds, wetlands, and shallow lakes (collectively “shallow waterbodies”) are among the most biogeochemically active freshwater ecosystems. Measurements of gross primary production (GPP), respiration (R), and net ecosystem production (NEP) a…
View article: Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies
Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies Open
The world's 1.4 million lakes (≥10 ha) provide many ecosystem services that are essential for human well‐being; however, only if their health status is good. Here, we reviewed common lake health issues and classified them using a simple hu…
View article: Pond greenhouse gas emissions controlled by duckweed coverage
Pond greenhouse gas emissions controlled by duckweed coverage Open
Freshwaters are significant contributors of greenhouse gases to the atmosphere, including carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O). Small waterbodies such as ponds are now recognized to have disproportionate green…
View article: Accumulation of recalcitrant dissolved organic matter in aerobic aquatic systems
Accumulation of recalcitrant dissolved organic matter in aerobic aquatic systems Open
An oxygenated atmosphere changed life on Earth but it also provided a negative feedback to organic matter accumulation by increasing decomposition rates. Nonetheless, dissolved organic carbon (DOC) is a huge carbon pool (> 750 Pg) and it c…
View article: HUMAN IMPACTS ON AQUATIC ECOSYSTEMS FROM THE LENS OF ECOLOGICAL STOICHIOMETRY
HUMAN IMPACTS ON AQUATIC ECOSYSTEMS FROM THE LENS OF ECOLOGICAL STOICHIOMETRY Open
Aquatic ecosystems are under different anthropogenic pressures, such as climate change, eutrophication, chemical pollution, overfishing, and introducing exotic species. Human activities have accelerated biogeochemical cycles forcing organi…
View article: Water chemistry data for studies of the biodegradability of dissolved organic matter in peatland catchments at the Marcell Experimental Forest: 2009-2011 (2nd Edition)
Water chemistry data for studies of the biodegradability of dissolved organic matter in peatland catchments at the Marcell Experimental Forest: 2009-2011 (2nd Edition) Open
This data publication includes water chemistry data for samples from the S2 and S6 research catchments at the Marcell Experimental Forest (MEF) in Balsam Township, Itasca County, Minnesota. Data include weekly or more frequent samples of s…
View article: Stable isotope patterns in lake food webs reflect productivity gradients
Stable isotope patterns in lake food webs reflect productivity gradients Open
Stable isotopes 13 C and 15 N are often used in lake ecosystems to assess energy sources and trophic positions, respectively. However, δ 13 C and δ 15 N are also influenced by internal biogeochemical processes in epilimnetic and hypolimnet…
View article: Upper Midwest lakes are supersaturated with N <sub>2</sub>
Upper Midwest lakes are supersaturated with N <sub>2</sub> Open
Significance Excess nitrogen (N) in freshwaters is problematic due to its impacts on eutrophication, biodiversity losses, and harmful algal blooms. Some microbial processes such as denitrification and anammox can remove N from systems whil…
View article: How increased atmospheric carbon dioxide and ‘The Law of the Minimum’ are contributing to environmental obesity
How increased atmospheric carbon dioxide and ‘The Law of the Minimum’ are contributing to environmental obesity Open
Justus von Liebig observed that one could greatly increase agricultural yields by adding relatively small quantities of nitrogen (N), phosphorus (P) and potassium (K) to soils. This finding led to the most recent agricultural revolution. B…
View article: Editorial: Progress in Ecological Stoichiometry
Editorial: Progress in Ecological Stoichiometry Open
EDITORIAL article Front. Microbiol., 05 September 2018Sec. Aquatic Microbiology Volume 9 - 2018 | https://doi.org/10.3389/fmicb.2018.01957
View article: Bioavailability of Dissolved Organic Phosphorus in Temperate Lakes
Bioavailability of Dissolved Organic Phosphorus in Temperate Lakes Open
Freshwater aquatic systems are biogeochemical hotspots, with heterotrophic bacteria rapidly cycling the compounds that pass through them. P is a key nutrient that controls primary production in many freshwater ecosystems and is important f…
View article: Stoichiometry of carbon, nitrogen, and phosphorus through the freshwater pipe
Stoichiometry of carbon, nitrogen, and phosphorus through the freshwater pipe Open
The “freshwater pipe” concept has improved our understanding of freshwater carbon (C) cycling, however, it has rarely been applied to macronutrients such as nitrogen (N) or phosphorus (P). Here, we synthesize knowledge of the processing of…
View article: University Of Minnesota Itasca Biological Station and Laboratories: Over 100 Years Of Field‐Based Education and Research
University Of Minnesota Itasca Biological Station and Laboratories: Over 100 Years Of Field‐Based Education and Research Open
Field stations are a critical part of biological and limnological infrastructure (National Research Council 2014). Many scientists are given their first research opportunities at field stations, the life of a field station often far surpas…
View article: Progress in Ecological Stoichiometry : Research Topic
Progress in Ecological Stoichiometry : Research Topic Open
Ecological stoichiometry concerns the way that the elemental composition of organisms shapes their ecology. It deals with balance and imbalanced elemental ratios and how that affects organism growth, nutrient cycling, and the interactions …
View article: Correction to: Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
Correction to: Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities Open
View article: What intrinsic and extrinsic factors explain the stoichiometric diversity of aquatic heterotrophic bacteria?
What intrinsic and extrinsic factors explain the stoichiometric diversity of aquatic heterotrophic bacteria? Open
The elemental content of microbial communities is dependent upon the physiology of constituent populations, yet ecological stoichiometry has made slow progress toward identifying predictors of how species and strains change the elemental c…
View article: Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities Open
View article: The Effects of Nutrient Imbalances and Temperature on the Biomass Stoichiometry of Freshwater Bacteria
The Effects of Nutrient Imbalances and Temperature on the Biomass Stoichiometry of Freshwater Bacteria Open
Two contemporary effects of humans on aquatic ecosystems are increasing temperatures and increasing nutrient concentrations from fertilizers. The response of organisms to these perturbations has important implications for ecosystem process…
View article: Redfield Ratios in Inland Waters: Higher Biological Control of C:N:P Ratios in Tropical Semi-arid High Water Residence Time Lakes
Redfield Ratios in Inland Waters: Higher Biological Control of C:N:P Ratios in Tropical Semi-arid High Water Residence Time Lakes Open
The canonical Redfield C:N:P ratio for algal biomass is often not achieved in inland waters due to higher C and N content and more variability when compared to the oceans. This has been attributed to much lower residence times and higher c…
View article: Ecological Stoichiometry beyond Redfield: An Ionomic Perspective on Elemental Homeostasis
Ecological Stoichiometry beyond Redfield: An Ionomic Perspective on Elemental Homeostasis Open
Elemental homeostasis has been largely characterized using three important elements that were part of the Redfield ratio (i.e., carbon: nitrogen: phosphorus). These efforts have revealed substantial diversity in homeostasis among taxonomic…
View article: Growth rate and resource imbalance interactively control biomass stoichiometry and elemental quotas of aquatic bacteria
Growth rate and resource imbalance interactively control biomass stoichiometry and elemental quotas of aquatic bacteria Open
The effects of resource stoichiometry and growth rate on the elemental composition of biomass have been examined in a wide variety of organisms, but the interaction among these effects is often overlooked. To determine how growth rate and …
View article: Appendix H. Results of ANOVA for experiments testing effects of fish exclusion on the biovolume of two dominant algae taxa (Diatomophyceae, Zygnematophyceae) on tiles and three dominant meiofauna taxa (Rotifers, Crustacea, Insecta) within sand in two habitat types of the Cinaruco River during falling, low, and rising periods of the annual hydrologic cycle.
Appendix H. Results of ANOVA for experiments testing effects of fish exclusion on the biovolume of two dominant algae taxa (Diatomophyceae, Zygnematophyceae) on tiles and three dominant meiofauna taxa (Rotifers, Crustacea, Insecta) within sand in two habitat types of the Cinaruco River during falling, low, and rising periods of the annual hydrologic cycle. Open
Results of ANOVA for experiments testing effects of fish exclusion on the biovolume of two dominant algae taxa (Diatomophyceae, Zygnematophyceae) on tiles and three dominant meiofauna taxa (Rotifers, Crustacea, Insecta) within sand in two …
View article: Appendix C. ANOSIM R-statistic and p values for comparisons of benthic algae and meiofauna assemblage structure (based on taxon biovolume data) within two habitat types (river channel vs. lagoons) across all seasons, and between different hydrological periods (falling water, low water, and rising water) within each habitat type.
Appendix C. ANOSIM R-statistic and p values for comparisons of benthic algae and meiofauna assemblage structure (based on taxon biovolume data) within two habitat types (river channel vs. lagoons) across all seasons, and between different hydrological periods (falling water, low water, and rising water) within each habitat type. Open
ANOSIM R-statistic and p values for comparisons of benthic algae and meiofauna assemblage structure (based on taxon biovolume data) within two habitat types (river channel vs. lagoons) across all seasons, and between different hydrological…
View article: Appendix F. Nonmetric multidimensional ordination plots of meiofauna species assemblages contrasting treatment replicates for each season according to habitat type.
Appendix F. Nonmetric multidimensional ordination plots of meiofauna species assemblages contrasting treatment replicates for each season according to habitat type. Open
Nonmetric multidimensional ordination plots of meiofauna species assemblages contrasting treatment replicates for each season according to habitat type.
View article: Appendix I. Natural seasonal variation of meiofauna density within sand from littoral zones of the river channel and floodplain lagoons.
Appendix I. Natural seasonal variation of meiofauna density within sand from littoral zones of the river channel and floodplain lagoons. Open
Natural seasonal variation of meiofauna density within sand from littoral zones of the river channel and floodplain lagoons.
View article: Appendix E. Graphs of mean abundance (+1 SD) of common algae genera from sand in treatments within the river channel and lagoons during three phases of the annual hydrological cycle of the Cinaurco River.
Appendix E. Graphs of mean abundance (+1 SD) of common algae genera from sand in treatments within the river channel and lagoons during three phases of the annual hydrological cycle of the Cinaurco River. Open
Graphs of mean abundance (+1 SD) of common algae genera from sand in treatments within the river channel and lagoons during three phases of the annual hydrological cycle of the Cinaurco River.
View article: Appendix G. Graphs of mean abundance (+1 SD) of common meiofauna taxa from sand in treatments within the river channel and lagoons during three phases of the annual hydrological cycle of the Cinaurco River.
Appendix G. Graphs of mean abundance (+1 SD) of common meiofauna taxa from sand in treatments within the river channel and lagoons during three phases of the annual hydrological cycle of the Cinaurco River. Open
Graphs of mean abundance (+1 SD) of common meiofauna taxa from sand in treatments within the river channel and lagoons during three phases of the annual hydrological cycle of the Cinaurco River.