Preprints

Filtering by Subject: Terrestrial and Aquatic Ecology

The unknown fate of macroplastic in mountain rivers

Maciej Liro, Tim van Emmerik, Anna Zielonka, et al.

Published: 2022-11-09
Subjects: Earth Sciences, Environmental Indicators and Impact Assessment, Environmental Monitoring, Geology, Geomorphology, Hydrology, Life Sciences, Natural Resources and Conservation, Sedimentology, Stratigraphy, Sustainability, Terrestrial and Aquatic Ecology, Water Resource Management

Mountain rivers are typically seen as relatively pristine ecosystems, supporting numerous goods (e.g., water resources) for human populations living not only in the mountain regions but also downstream from them. Recent evidence suggests, however, that mountain river valleys in populated areas can be substantially polluted by macroplastic (plastic item > 5 mm). It is, however, unknown how [...]

Trait-based modeling revealed higher microbial diversity leads to greater ecological resilience in response to an ecosystem disturbance

Jiaze Wang, Victoria J. Coles, Michael R. Stukel, et al.

Published: 2022-10-15
Subjects: Biogeochemistry, Earth Sciences, Environmental Microbiology and Microbial Ecology Life Sciences, Microbiology, Oceanography, Oil, Gas, and Energy, Physical Sciences and Mathematics, Sustainability, Terrestrial and Aquatic Ecology

To quantitatively understand the ecological resilience of an ecosystem with specialized habitats, we focused on deep-sea microbial communities and simulated the response of diverse microbes in specialized habitats to a pulse ecosystem disturbance - the Deepwater Horizon Oil Spill in the Gulf of Mexico. Two microbial communities with equivalent metabolic libraries were acclimated to the presence [...]

Macrophyte-hydrodynamic interactions mediate stratification and dissolved oxygen dynamics in ponds

Ellen Amara Albright, Robert Ladwig, Grace Marie Wilkinson

Published: 2022-09-24
Subjects: Biogeochemistry, Hydrology, Terrestrial and Aquatic Ecology

Small waterbodies are sensitive to stressors such as eutrophication and heatwaves; however, interactions between macrophytes and hydrodynamics may mediate the effects of compounding stressors. Leveraging an ecosystem experiment and hydrodynamic model, we evaluated how macrophyte biomass, thermal structure, and dissolved oxygen (DO) responded to the interaction of episodic nutrient loading and [...]

Microcystin as a Biogeochemical Cycle: pools, fluxes, and fates of the cyanotoxin in aquatic ecosystems

Quin Shingai, Grace Marie Wilkinson

Published: 2022-06-17
Subjects: Ecology and Evolutionary Biology, Life Sciences, Terrestrial and Aquatic Ecology

Cyanotoxins such as microcystin pose a serious threat to aquatic ecosystems and human health. As such, there is a pressing need understand the production, movement, and storage of microcystin in lentic waterbodies. We constructed a biogeochemical cycle for microcystin through a comprehensive literature synthesis, identifying four major pools and nine fluxes. This conceptual model can be used as [...]

Experimental evaluation of the effects of bigmouth buffalo (Ictiobus cyprinellus) density on shallow lake ecosystems

Grace Marie Wilkinson, Tyler Butts, Elena Sandry, et al.

Published: 2022-05-19
Subjects: Ecology and Evolutionary Biology, Life Sciences, Terrestrial and Aquatic Ecology

Bigmouth buffalo (Ictiobus cyprinellus) is a large-bodied planktivore inhabiting shallow waterways in North America and subjected to unregulated harvest throughout much of their native range. Despite high harvest pressure on some populations, we know little about the ecosystem-level effects of lowering bigmouth buffalo densities. To evaluate the effect of bigmouth buffalo density on lower trophic [...]

GEDI Launches a New Era of Biomass Inference from Space

Ralph Dubayah, John Armston, Sean Healey, et al.

Published: 2022-04-20
Subjects: Applied Statistics, Earth Sciences, Other Earth Sciences, Other Forestry and Forest Sciences, Terrestrial and Aquatic Ecology

Accurate estimation of aboveground forest biomass stocks is required to assess the impacts of land use changes such as deforestation and subsequent regrowth on concentrations of atmospheric CO2. The Global Ecosystem Dynamics Investigation (GEDI) is a lidar mission launched by NASA to the International Space Station in 2018. GEDI was specifically designed to retrieve vegetation structure within a [...]

Fire-vegetation interactions in Arctic tundra and their spatial variability

Dong Chen, Cheng Fu, Liza K. Jenkins, et al.

Published: 2022-03-15
Subjects: Earth Sciences, Plant Sciences, Remote Sensing, Terrestrial and Aquatic Ecology

Circumpolar tundra has experienced a greater increase in temperatures compared to any other biome, with a magnitude of the increase nearly three times the global average. Widespread shrubification associated with pronounced observed warming is gradually transforming the tundra ecosystem structure and function. This study confirms that a shrub-dominated fire-biomass positive feedback loop is [...]

Sediment phosphorus composition controls hot spots and hot moments of internal loading in a temperate reservoir

Ellen Amara Albright, Grace Marie Wilkinson

Published: 2022-02-05
Subjects: Life Sciences, Terrestrial and Aquatic Ecology

Phosphorus (P) flux across the sediment-water interface in lakes and reservoirs responds to external perturbations within the context of sediment characteristics. Lentic ecosystems experience profound spatiotemporal heterogeneity in the mechanisms that control sediment P fluxes, likely producing hot spots and hot moments of internal loading. However, spatiotemporal variation in P fluxes remains [...]

High Inter- and Intra-lake Variation in Sediment Phosphorus Pools in Shallow Lakes

Ellen Amara Albright, Rachel Fleck King, Quin Shingai, et al.

Published: 2022-02-05
Subjects: Life Sciences, Terrestrial and Aquatic Ecology

Phosphorus (P) release from lakebed sediments may fuel phytoplankton blooms, especially in shallow waterbodies. A primary mechanism that controls internal P loading is the size and chemical composition of the sediment P pool. However, variation in sediment P within and among shallow lakes remains poorly quantified. We measured the degree of spatial heterogeneity in the size and composition of [...]

Fire and water: contaminants and clearance following uncontrolled fires

Erin Ingrid Walsh, Tim Stevenson, Richard NL Terrett, et al.

Published: 2021-11-08
Subjects: Terrestrial and Aquatic Ecology

There is a growing body of evidence surrounding the implications of uncontrolled bushfires and wildfires on water. This topic has importance from an ecological perspective, and significance for human health as it has consequences for drinking water quality and supply. Against the backdrop of climate change, it is especially important to holistically understand the impact of fire on water. This [...]

Modeling the Responses of Dissolved Oxygen and Nitrate Concentrations due to Land Use and Land Cover Change Scenarios in a Large Subtropical Reservoir

Carolina Cerqueira Barbosa, Maria do Carmo Calijuri, Phelipe da Silva Anjinho, et al.

Published: 2021-09-15
Subjects: Biochemistry, Environmental Engineering, Terrestrial and Aquatic Ecology

Itupararanga reservoir is a large reservoir built in the Southeast of Brazil to support multiple uses, mainly hydropower generation and drinking water supply for almost 1 million people. We applied a process-based biogeochemical model and a distributed basin load model to assess the responses of dissolved oxygen and nitrate concentrations in the Itupararanga reservoir based on three land use and [...]

Drivers of phytoplankton responses to summer storms in a stratified lake: a modelling study

Jorrit Padric Mesman, Ana I. Ayala, St├ęphane Goyette, et al.

Published: 2021-08-03
Subjects: Hydrology, Other Environmental Sciences, Terrestrial and Aquatic Ecology

Extreme wind events affect lake phytoplankton amongst others by deepening the mixed layer and increasing internal nutrient loading. Both increases and decreases of phytoplankton biomass after storms have been observed, but the precise mechanisms driving these responses remain poorly understood or quantified. In this study, we coupled a one-dimensional physical model to a biogeochemical model to [...]

Ten Simple Rules for Researchers Who Want to Develop Web Apps

Sheila M. Saia, Natalie G. Nelson, Sierra N. Young, et al.

Published: 2021-07-18
Subjects: Agricultural Science, Agriculture, Applied Statistics, Artificial Intelligence and Robotics, Bioresource and Agricultural Engineering, Computer Sciences, Databases and Information Systems, Environmental Monitoring, Graphics and Human Computer Interfaces, Natural Resources and Conservation, Software Engineering, Terrestrial and Aquatic Ecology, Water Resource Management

Growing interest in data-driven, decision-support tools across the life sciences and physical sciences has motivated development of web applications, also known as web apps. Web apps can help disseminate research findings and present research outputs in ways that are more accessible and meaningful to the general public--from individuals, to governments, to companies. Specifically, web apps enable [...]

Effects of Cone Penetrometer Testing on Shallow Hydrogeology at a Contaminated Site

Terry C. Hazen, Andrew D. Putt, Erin R. Kelly, et al.

Published: 2021-06-07
Subjects: Environmental Engineering, Geotechnical Engineering, Systems Biology, Terrestrial and Aquatic Ecology

Penetration testing is a popular and instantaneous technique for subsurface mapping, contaminant tracking, and the determination of soil characteristics. While the small footprint and reproducibly of cone penetrometer testing makes it an ideal method for in-situ subsurface investigations at contaminated sites, the effects to local shallow groundwater wells and measurable influence on monitoring [...]

The gap between atmospheric nitrogen deposition experiments and reality

Daniel Patrick Bebber

Published: 2021-05-05
Subjects: Agricultural Science, Agriculture, Atmospheric Sciences, Biogeochemistry, Environmental Indicators and Impact Assessment, Environmental Microbiology and Microbial Ecology Life Sciences, Environmental Monitoring, Forest Biology, Other Environmental Sciences, Planetary Biogeochemistry, Soil Science, Terrestrial and Aquatic Ecology

Anthropogenic activities have dramatically altered the global nitrogen (N) cycle. Atmospheric N deposition, primarily from combustion of biomass and fossil fuels, has caused acidification of precipitation and freshwater and triggered intense research into ecosystem responses to this pollutant. Experimental simulations of N deposition have been the main scientific tool to understand ecosystem [...]

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