Nik Callow
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View article: Does high fire frequency compromise structural integrity of a large eucalypt?
Does high fire frequency compromise structural integrity of a large eucalypt? Open
Globally, fire regimes are changing with more frequent fires, longer fire seasons, and burning in places and times where fire was once rare. To mediate fire risk, prescribed burning is often used to reduce fuel but in some ecosystems incre…
View article: Water or Energy Supply Driven Change in Moisture Availability Switches the Slope Direction Between Shallow Soil Moisture and Actual Evapotranspiration: Interpretation Within the Context of the Complementary Relationship
Water or Energy Supply Driven Change in Moisture Availability Switches the Slope Direction Between Shallow Soil Moisture and Actual Evapotranspiration: Interpretation Within the Context of the Complementary Relationship Open
Ecosystem moisture availability ( ma ) increases as the landscape becomes more energy‐limited, driven by either rising water supply or declining energy supply. This study aimed to assess the influence of water and energy supply changes on …
View article: The response of marginal snowpacks to climate warming
The response of marginal snowpacks to climate warming Open
Marginal snowpacks are a critical part of the hydrology and ecology of temperate mountain regions. However, their sensitivity to temperature increase is uncertain due to their phenology which sits between seasonal and ephemeral snowpacks. …
View article: Hydroclimate variability in the eastern Kimberley, Australia, since the last deglaciation
Hydroclimate variability in the eastern Kimberley, Australia, since the last deglaciation Open
The climate of the Kimberley region in tropical northwest Australia is dominated by the Indo‐Australian summer monsoon (IASM). Understanding of the palaeoclimate since the Last Glacial Maximum in this region, which is well placed to record…
View article: Training sensor-agnostic deep learning models for remote sensing: Achieving state-of-the-art cloud and cloud shadow identification with OmniCloudMask
Training sensor-agnostic deep learning models for remote sensing: Achieving state-of-the-art cloud and cloud shadow identification with OmniCloudMask Open
Deep learning models are widely used to extract features and insights from remotely sensed imagery. However, these models typically perform optimally when applied to the same sensor, resolution and imagery processing level as used during t…
View article: A record of monsoon rainforest variability from the Kimberley region in northwestern Australia
A record of monsoon rainforest variability from the Kimberley region in northwestern Australia Open
Northern Australia experiences extreme seasonality via the Indo‐Australian summer monsoon, with high inter‐annual variability in hydroclimate. Understanding the influence of hydrological variability on the landscape through the period of h…
View article: Introducing Pour Points: Characteristics and Hydrological Significance of a Rainfall‐Concentrating Mechanism in a Water‐Limited Woodland Ecosystem
Introducing Pour Points: Characteristics and Hydrological Significance of a Rainfall‐Concentrating Mechanism in a Water‐Limited Woodland Ecosystem Open
The interception of rainfall by plant canopies alters the depth and spatial distribution of water arriving at the soil surface, and thus the location, volume, and depth of infiltration. Mechanisms like stemflow are known to concentrate rai…
View article: Introducing Pour Points: Characteristics and hydrological significance of a rainfall-concentrating mechanism in a water-limited woodland ecosystem
Introducing Pour Points: Characteristics and hydrological significance of a rainfall-concentrating mechanism in a water-limited woodland ecosystem Open
The interception of rainfall by plant canopies alters the depth and spatial distribution of water arriving at the soil surface, and thus the location, volume, and depth of infiltration. Mechanisms like stemflow are well known to concentrat…
View article: Reef island evolution in a turbid‐water coral reef province of the Indo‐<scp>P</scp>acific
Reef island evolution in a turbid‐water coral reef province of the Indo‐<span>P</span>acific Open
Coral reef islands are vulnerable landforms to environmental change. Constructed of largely unconsolidated reef‐derived sediments, they are highly sensitive to variations in metocean boundary conditions, raising global concern about their …
View article: Fire reduces eucalypt forest flowering phenology at the landscape-scale
Fire reduces eucalypt forest flowering phenology at the landscape-scale Open
Plant phenology describes the timing of reproductive events including flowering and fruiting, which for many species are affected by fire disturbance. Understanding phenological responses to fire provides insights into how forest demograph…
View article: Improving the accuracy of the Water Detect algorithm using Sentinel-2, Planetscope and sharpened imagery: a case study in an intermittent river
Improving the accuracy of the Water Detect algorithm using Sentinel-2, Planetscope and sharpened imagery: a case study in an intermittent river Open
International audience
View article: Ecohydrological metrics derived from multispectral images to characterize surface water in an intermittent river
Ecohydrological metrics derived from multispectral images to characterize surface water in an intermittent river Open
Accurately describing the hydrology of intermittent rivers is a critical step in improving our understanding and management of freshwater ecosystems. Traditional approaches such as using gauged discharge data provide little information onc…
View article: Soil moisture and temperature drive emergence delays associated with fire seasonality in eucalypt forests
Soil moisture and temperature drive emergence delays associated with fire seasonality in eucalypt forests Open
Many ecosystems are well adapted to fire, although the impacts of fire seasonality and its effect on post-fire recruitment are less well understood. Late summer or autumn fires within eucalypt forests with a Mediterranean-type climate allo…
View article: Prioritizing Engagement of a Diverse Student Cohort in Online Hydrology Learning at the University of Western Australia
Prioritizing Engagement of a Diverse Student Cohort in Online Hydrology Learning at the University of Western Australia Open
Like most water education institutions worldwide, hydrology instructors at the University of Western Australia (UWA) had to rapidly adapt traditional teaching strategies to manage the COVID-19 pandemic. With diverse student cohorts, includ…
View article: Using ensemble methods to improve the robustness of deep learning for image classification in marine environments
Using ensemble methods to improve the robustness of deep learning for image classification in marine environments Open
Deep learning has been shown to be effective for classification of coral in benthic imagery, and is becoming a tool for use in many monitoring programs around the world. Although deep learning accuracy for coral reef classification has bee…
View article: Regional-scale fire severity mapping of Eucalyptus forests with the Landsat archive
Regional-scale fire severity mapping of Eucalyptus forests with the Landsat archive Open
Fire managers seek accurate methods to map fire severity for forest management efforts. Fire severity data with wide spatial and temporal coverage enhances understanding of fire's impact on vegetation and improves planning to mitigate the …
View article: ENSO feedback drives variations in dieback at a marginal mangrove site
ENSO feedback drives variations in dieback at a marginal mangrove site Open
Ocean–atmosphere climatic interactions, such as those resulting from El Niño Southern Oscillation (ENSO) are known to influence sea level, sea surface temperature, air temperature, and rainfall in the western Pacific region, through to the…
View article: Assessing the Capability and Potential of LiDAR for Weed Detection
Assessing the Capability and Potential of LiDAR for Weed Detection Open
Conventional methods of uniformly spraying fields to combat weeds, requires large herbicide inputs at significant cost with impacts on the environment. More focused weed control methods such as site-specific weed management (SSWM) have bec…