Preprints

Filtering by Subject: Other Life Sciences

Seasonal dynamics of zooplankton nutrient recycling in a hypereutrophic reservoir

Tyler James Butts, Eric K Moody, Grace Marie Wilkinson

Published: 2022-02-17
Subjects: Biochemistry, Biology, Ecology and Evolutionary Biology, Life Sciences, Other Life Sciences

Consumer-driven nutrient cycling influences aquatic ecosystem functioning by altering energy flow as well as the movement and transformation of nutrients. In hypereutrophic lakes, zooplankton nutrient recycling has largely been considered negligible due to the high concentrations of available nutrients. A recent comparative analysis found that zooplankton community composition may influence [...]

The challenge of setting ‘climate ready’ ecological targets for environmental flow planning

Meegan Judd, Nicholas Bond, Avril Horne

Published: 2021-12-07
Subjects: Biodiversity, Civil and Environmental Engineering, Other Life Sciences

Implementing environmental flows has emerged as a major restoration tool for addressing the impacts of hydrologic alteration in large river systems. The ‘natural flow paradigm’ has been a central guiding principle for determining important ecohydrological relationships. Yet, climate change and associated changes in rainfall run off relationships, seasonality of flows, disruptions to food webs and [...]

What’s obstructing climate change adaptation in environmental water management?

Meegan Judd, Martina Boese, Avril Horne, et al.

Published: 2021-12-07
Subjects: Biodiversity, Civil and Environmental Engineering, Other Life Sciences

Climate change is irreversibly changing the water cycle, yet existing environmental flow assessment methods often fail to recognise the non stationarity of hydro climatic systems. Failure to do so will lead to the inability of environmental water management to achieve its restoration targets. Australia has undergone major reform over the past twelve years to recover water from consumptive use for [...]

Environmental Flows Assessments in the face of uncertainty: supporting the adaptive management of environmental flows

Avril Horne, J Angus Webb, Meghan Mussehl, et al.

Published: 2021-12-06
Subjects: Civil and Environmental Engineering, Other Life Sciences

Adaptive management has become the preferred approach for managing environmental flows globally, and successful implementation recognizes multiple dimensions of variability and complexity in socio-ecological systems. This paper outlines an environmental flow assessment methodology that explicitly addresses the uncertainty and change inherent in adaptively managing multiple values for management [...]

Chevrons: origin and relevance for the reconstruction of past wind regimes

Lucas Erouan Vimpere, Pascal Kindler, Sebastien Castelltort

Published: 2020-12-15
Subjects: Climate, Earth Sciences, Geology, Geomorphology, Meteorology, Other Life Sciences, Sedimentology, Stratigraphy

Since its first use in the late 80’s, the term chevron has been employed in numerous studies to describe large U- and V-shaped ridges found in or near shorelines worldwide. Most studies have so far focused on Bahamian chevrons that are exclusively of Late Pleistocene age, and on the supposed Holocene chevrons found in S-Madagascar and Australia. In the Bahamas, these deposits have been [...]

A newly reconciled data set for identifying sea level rise and variability in Dublin Bay

Amin Shoari Nejad, Andrew Parnell, Alice Greene, et al.

Published: 2020-05-28
Subjects: Applied Statistics, Climate, Earth Sciences, Life Sciences, Oceanography and Atmospheric Sciences and Meteorology, Other Earth Sciences, Other Life Sciences, Physical Sciences and Mathematics, Planetary Sciences, Statistics and Probability

We provide an updated sea level dataset for Dublin for the period 1938 to 2016 at yearly resolution. Using a newly collated sea level record for Dublin Port, as well as two nearby tide gauges at Arklow and Howth Harbour, we perform data quality checks and calibration of the Dublin Port record by adjusting the biased high water level measurements that affect the overall calculation of mean sea [...]

Identification of Hydrologic Landscapes in Brazilian basins and its application as indicator of water yield and storage

Matheus Henrique Mortene, Ronalton Evandro Machado

Published: 2020-04-09
Subjects: Civil and Environmental Engineering, Engineering, Environmental Studies, Life Sciences, Other Civil and Environmental Engineering, Other Life Sciences, Social and Behavioral Sciences

This study aimed to use the Hydrologic Landscapes as environmental classification method in the Piracicaba, Capivari and Jundiaí river basins, validate and use it as an indicator of water yield and storage areas. The method comprises in the same Information Plan (IP) factors that interact with the hydrological cycle in its terrestrial phase. The state of São Paulo, where most of the area is [...]

Northern peatland depth and lateral expansion is inconsistent with a 1055 GtC estimate of carbon storage

Joshua Lee Ratcliffe, Haijun Peng, Jelmer Nijp, et al.

Published: 2020-03-04
Subjects: Life Sciences, Other Life Sciences

Peatlands contain one of the largest stores of terrestrial carbon and exert a considerable influence on the global climate cycle. However, both the magnitude of the peatland carbon pool and the development of this pool through time are poorly constrained. In a recently published article, Nichols and Peteet combine basal radiocarbon dates from palaeoecological studies with previously published [...]

Machine learning for digital soil mapping: applications, challenges and suggested solutions

Alexandre M.J.-C. Wadoux, Budiman Minasny, Alex McBratney

Published: 2020-02-06
Subjects: Agriculture, Life Sciences, Other Life Sciences

The uptake of machine learning (ML) algorithms in digital soil mapping (DSM) is transforming the way soil scientists produce their maps. Machine learning is currently applied to mapping soil properties or classes much in the same way as other unrelated fields of science. Mapping of soil, however, has unique aspects which require adaptations of the ML algorithms. These features are for example, [...]

serac: a R package for ShortlivEd RAdionuclide Chronology of recent sediment cores

Rosalie Bruel, Pierre Sabatier

Published: 2020-01-18
Subjects: Life Sciences, Other Life Sciences

Short-lived radionuclides are measured in surface sediment to provide a geochronology for the past century. Age-depth models can be produced from 210Pbex activity-derived sedimentation rates and confirmed by 137Cs and 241Am activities that are result of fallout from nuclear weapon tests and the Chernobyl accident. Different methods of age depth modelling using such data require expertise in lake [...]

The environmental impacts of palm oil in context

Erik Meijaard, Thomas Brooks, Kimberly Carlson, et al.

Published: 2020-01-10
Subjects: Agriculture, Ecology and Evolutionary Biology, Food Science, Life Sciences, Other Food Science, Other Life Sciences, Terrestrial and Aquatic Ecology

Delivering the Sustainable Development Goals (SDGs) requires balancing demands on land between agriculture (SDG 2) and biodiversity (SDG 15). The production of vegetable oils in general, and palm oil in particular, is perhaps the most controversial illustration of these trade-offs. Global annual demand for vegetable oil for food, animal feed and fuel is currently at 210 million tons1 (Mt), with [...]

The first climate tipping point – Already in the past?

Jorgen Randers, Ulrich Goluke

Published: 2020-01-03
Subjects: Life Sciences, Other Life Sciences

Humanity may have passed its first climate tipping point and face self-sustained melting of the permafrost for hundreds of years even if all man-made GHG emissions are stopped.

Enriching the historical meteorological information using Romanian newspaper reports

Sorin Cheval, Aritina Haliuc, Bogdan Antonescu, et al.

Published: 2019-09-17
Subjects: Life Sciences, Other Life Sciences

This study presents the meteorological information spanning the last two decades of the end of 19th century (1880-1900) extracted from three Romanian newspapers (România Liberă, Gazeta de Transilvania and Foaia Poporului). It describes the characteristics of the newspaper data included in the database, it offers and overview of the meteorological network and climate picture at that time in [...]

More than planetary-scale feedback self-regulation: A Biological-centred approach to the Gaia Hypothesis

Sergio C Rubin, Michel Crucifix

Published: 2019-08-15
Subjects: Life Sciences, Other Life Sciences

Recent appraisals of the Gaia theory tend to focus on the claim that planetary life is a cybernetic regulator that would self-regulate Earth’s chemistry composition and climate dynamics, following either a weak (biotic and physical processes create feedback loops), or a strong (biological activity control and regulates the physical processes) interpretation of the Gaia hypothesis. Here, we [...]

Decentralized Flood Forecasting Using Deep Neural Networks

Muhammed Sit, Ibrahim Demir

Published: 2019-06-22
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering, Life Sciences, Other Life Sciences

Predicting flood for any location at times of extreme storms is a longstanding problem that has utmost importance in emergency management. Conventional methods that aim to predict water levels in streams use advanced hydrological models still lack of giving accurate forecasts everywhere. This study aims to explore artificial deep neural networks performance on flood prediction. While providing [...]

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