Luke Ellison
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View article: Growth, foraging, and health effects of turbidity on captive, sub-adult Delta Smelt
Growth, foraging, and health effects of turbidity on captive, sub-adult Delta Smelt Open
Food limitation is considered a major cause for the decline of Delta Smelt (Hypomesus transpacificus) and other pelagic forage fishes in the Sacramento-San Joaquin Delta and San Francisco Estuary. However, reversing the decline of pelagic …
View article: The Effect of Combustion Conditions on Emissions of Elemental Carbon and Organic Carbon and Formation of Secondary Organic Carbon in Simulated Wildland Fires
The Effect of Combustion Conditions on Emissions of Elemental Carbon and Organic Carbon and Formation of Secondary Organic Carbon in Simulated Wildland Fires Open
We investigated the influence of combustion conditions on emissions of elemental carbon (EC) and organic carbon (OC) and the formation of secondary organic carbon (SOC) in wildland fires. We performed combustion experiments using fuel beds…
View article: Validating estuarine movements from otoliths for an imperiled fish
Validating estuarine movements from otoliths for an imperiled fish Open
The application of otolith tools to infer the movement history of fishes requires controlled experiments to validate methods and assess confidence in inferences gained for wild specimens. The delta smelt Hypomesus transpacificus is a Criti…
View article: Insights from a year of field deployments inform the conservation of an endangered estuarine fish
Insights from a year of field deployments inform the conservation of an endangered estuarine fish Open
Freshwater fishes are increasingly facing extinction. Some species will require conservation intervention such as habitat restoration and/or population supplementation through mass-release of hatchery fish. In California, USA, a number of …
View article: Captive-reared Delta Smelt (Hypomesus transpacificus) exhibit high survival in natural conditions using in situ enclosures
Captive-reared Delta Smelt (Hypomesus transpacificus) exhibit high survival in natural conditions using in situ enclosures Open
Conservation of endangered fishes commonly includes captive breeding, applied research, and management. Since 1996, a captive breeding program has existed for the federally threatened and California endangered Delta Smelt Hypomesus transpa…
View article: Vital dye immersion evaluations with juvenile delta smelt
Vital dye immersion evaluations with juvenile delta smelt Open
Immersion‐based vital dyes were tested as a marking method for use in larval smelt mark–recapture studies. We assessed five fluorescent dyes as a mark for juvenile osmerids: 4‐Di‐1‐ASP, BODIPY FL C12, BODIPY 505/515, Nile red, and calcein.…
View article: Experimental validation of otolith-based age and growth reconstructions across multiple life stages of a critically endangered estuarine fish
Experimental validation of otolith-based age and growth reconstructions across multiple life stages of a critically endangered estuarine fish Open
Background The application of otolith-based tools to inform the management and conservation of fishes first requires taxon- and stage-specific validation. The Delta Smelt ( Hypomesus transpacificus ), a critically endangered estuarine fish…
View article: Biomass Burning and Water Balance Dynamics in the Lake Chad Basin in Africa
Biomass Burning and Water Balance Dynamics in the Lake Chad Basin in Africa Open
The present study investigated the effect of biomass burning on the water cycle using a case study of the Chari–Logone Catchment of the Lake Chad Basin (LCB). The Chari–Logone catchment was selected because it supplies over 90% of the wate…
View article: Six global biomass burning emission datasets: intercomparison and application in one global aerosol model
Six global biomass burning emission datasets: intercomparison and application in one global aerosol model Open
Aerosols from biomass burning (BB) emissions are poorly constrained in global and regional models, resulting in a high level of uncertainty in understanding their impacts. In this study, we compared six BB aerosol emission datasets for 200…
View article: A pilot study of the performance of captive‐reared delta smelt <i>Hypomesus transpacificus</i> in a semi‐natural environment
A pilot study of the performance of captive‐reared delta smelt <i>Hypomesus transpacificus</i> in a semi‐natural environment Open
A captive breeding programme was developed in 2008 for delta smelt Hypomesus transpacificus in reaction to dramatic population decline over several decades. We took 526 sub‐adult captive‐reared delta smelt and cultured them for 200 days wi…
View article: Evaluation of chromatophores as natural marks for delta smelt: the effects of life-stage and light intensity
Evaluation of chromatophores as natural marks for delta smelt: the effects of life-stage and light intensity Open
Individual identification of small sized fishes such as the endangered delta smelt Hypomesus transpacificus remains a pressing need. We evaluated the stability of chromatophores as potential natural marks for subadult and adult delta smelt…
View article: Supplementary material to "Six Global Biomass Burning Emission Datasets: Inter-comparison and Application in one Global Aerosol Model"
Supplementary material to "Six Global Biomass Burning Emission Datasets: Inter-comparison and Application in one Global Aerosol Model" Open
averaged monthly mean AOD at 550nm in MODIS-Aqua (i.e., MOD-a) along with model biases (i.e., model minus MODIS-a) in seven model experiments, i.e., NOBB, GFED3.1,GFED4s, FINN1.5, GFAS1.2,FEER1.0, and QFED2.4,for September and April 2008, …
View article: Six Global Biomass Burning Emission Datasets: Inter-comparison and Application in one Global Aerosol Model
Six Global Biomass Burning Emission Datasets: Inter-comparison and Application in one Global Aerosol Model Open
Aerosols from biomass burning (BB) emissions are poorly constrained in global and regional models, resulting in a high level of uncertainty in understanding their impacts. In this study, we compared six BB aerosol emission datasets for 200…
View article: A Conservation Hatchery Population of Delta Smelt Shows Evidence of Genetic Adaptation to Captivity After 9 Generations
A Conservation Hatchery Population of Delta Smelt Shows Evidence of Genetic Adaptation to Captivity After 9 Generations Open
Genetic adaptation to captivity is a concern for threatened and endangered species held in conservation hatcheries. Here, we present evidence of genetic adaptation to captivity in a conservation hatchery for the endangered delta smelt (Fis…
View article: NU-WRF Aerosol Transport Simulation over West Africa: Effects of Biomass Burning on Smoke Aerosol Distribution
NU-WRF Aerosol Transport Simulation over West Africa: Effects of Biomass Burning on Smoke Aerosol Distribution Open
Series of aerosol transport hindcasts for West Africa were conducted using the Weather Research and Forecasting (WRF) Model coupled to chemistry within the NASA-Unified WRF (NU-WRF) framework. The transport of biomass-burning aerosols in A…
View article: Mitigating Satellite‐Based Fire Sampling Limitations in Deriving Biomass Burning Emission Rates: Application to WRF‐Chem Model Over the Northern sub‐Saharan African Region
Mitigating Satellite‐Based Fire Sampling Limitations in Deriving Biomass Burning Emission Rates: Application to WRF‐Chem Model Over the Northern sub‐Saharan African Region Open
Largely used in several independent estimates of fire emissions, fire products based on MODIS sensors aboard the Terra and Aqua polar‐orbiting satellites have a number of inherent limitations, including (a) inability to detect fires below …
View article: Classification of Wildfires from MODIS Data Using Neural Networks
Classification of Wildfires from MODIS Data Using Neural Networks Open
Wildfires are destructive to both life and property, which necessitates an approach to quickly and autonomously detect these events from orbital observatories. This talk will introduce a neural network based approach for classifying wildfi…
View article: Biomass burning, land-cover change, and the hydrological cycle in Northern sub-Saharan Africa
Biomass burning, land-cover change, and the hydrological cycle in Northern sub-Saharan Africa Open
The Northern Sub-Saharan African (NSSA) region, which accounts for 20%–25% of the global carbon emissions from biomass burning, also suffers from frequent drought episodes and other disruptions to the hydrological cycle whose adverse socie…
View article: Comparison of GFED3, QFED2 and FEER1 Biomass Burning Emissions Datasets in a Global Model
Comparison of GFED3, QFED2 and FEER1 Biomass Burning Emissions Datasets in a Global Model Open
Biomass burning contributes about 40% of the global loading of carbonaceous aerosols, significantly affecting air quality and the climate system by modulating solar radiation and cloud properties. However, fire emissions are poorly constra…