Search results for: Nicholas C. Coops

Items from 1 to 20 out of 188 results

article

Facets of functional diversity support niche‐based explanations for Australian biodiversity gradients

Margaret E. Andrew, Douglas K. Bolton, Gregory J. M. Rickbeil, Nicholas C. Coops

Journal of Biogeography > 51 > 3 > 467 - 482

Aim There is widespread support that species richness increases with the available energy of an ecosystem, but the mechanisms underlying this driver of biodiversity patterns remain elusive. We evaluated gradients of functional diversity to test whether the higher species richness of productive, structurally diverse environments is due to a greater range of niches being supported by the abiotic conditions...

article

Advances in remote sensing of freshwater fish habitat: A systematic review to identify current approaches, strengths and challenges

Spencer Dakin Kuiper, Nicholas C. Coops, Scott G. Hinch, Joanne C. White

Fish and Fisheries > 24 > 5 > 829 - 847

Remote sensing technology offers the ability to derive information on freshwater fish habitats across broad geographic areas and has the potential to transform approaches to monitoring. However, the numerous platforms, sensors and analytical software that are available may overwhelm those interested in utilizing this important technology and thus limit its broad application and uptake. Our review...

article

Picturing local adaptation: Spectral and structural traits from drone remote sensing reveal clinal responses to climate transfer in common‐garden trials of interior spruce (Picea engelmannii × glauca)

Samuel Grubinger, Nicholas C. Coops, Gregory A. O'Neill

Global Change Biology > 29 > 17 > 4842 - 4860

Common‐garden trials of forest trees provide phenotype data used to assess growth and local adaptation; this information is foundational to tree breeding programs, genecology, and gene conservation. As jurisdictions consider assisted migration strategies to match populations to suitable climates, in situ progeny and provenance trials provide experimental evidence of adaptive responses to climate change...

article

Evolutionary history explains foliar spectral differences between arbuscular and ectomycorrhizal plant species

Johanna R. Jantzen, Etienne Laliberté, Alexis Carteron, Rosalie Beauchamp‐Rioux, more

New Phytologist > 238 > 6 > 2651 - 2667

Leaf spectra are integrated foliar phenotypes that capture a range of traits and can provide insight into ecological processes. Leaf traits, and therefore leaf spectra, may reflect belowground processes such as mycorrhizal associations. However, evidence for the relationship between leaf traits and mycorrhizal association is mixed, and few studies account for shared evolutionary history. We conduct...

article

Abundance patterns of mammals across Russia explained by remotely sensed vegetation productivity and snow indices

Elena Razenkova, Maxim Dubinin, Anna M. Pidgeon, Martina L. Hobi, more

Journal of Biogeography > 50 > 5 > 932 - 946

Aim Predicting biodiversity responses to global changes requires good models of species' distributions. Both environmental conditions and human activities determine population density patterns. However, quantifying the relationship between wildlife population densities and their underlying environmental conditions across large geographical scales has remained challenging. Our goal was to explain...

article

Predicting leaf traits across functional groups using reflectance spectroscopy

Shan Kothari, Rosalie Beauchamp‐Rioux, Florence Blanchard, Anna L. Crofts, more

New Phytologist > 238 > 2 > 549 - 566

Plant ecologists use functional traits to describe how plants respond to and influence their environment. Reflectance spectroscopy can provide rapid, non‐destructive estimates of leaf traits, but it remains unclear whether general trait‐spectra models can yield accurate estimates across functional groups and ecosystems. We measured leaf spectra and 22 structural and chemical traits for nearly...

article

Effects of climate change on forest plantation productivity in Chile

Gonzalo Carrasco, Auro C. Almeida, Mark Falvey, Guillermo Federico Olmedo, more

Global Change Biology > 28 > 24 > 7391 - 7409

Forest plantations in Chile occupy more than 2.2 million ha and are responsible for 2.1% of the GDP of the country's economy. The ability to accurately predictions of plantations productivity under current and future climate has an impact can enhance on forest management and industrial wood production. The use of process‐based models to predict forest growth has been instrumental in improving the...

article

Changing spring snow cover dynamics and early season forage availability affect the behavior of a large carnivore

Gregory J. M. Rickbeil, Nicholas C. Coops, Ethan E. Berman, Cameron J. R. McClelland, more

Global Change Biology > 26 > 11 > 6266 - 6275

Changing climates are altering wildlife habitats and wildlife behavior in complex ways. Here, we examine how changing spring snow cover dynamics and early season forage availability are altering grizzly bear (Ursus arctos) behavior postden emergence. Telemetry data were used to identify spring activity dates for 48 individuals in the Yellowhead region of Alberta, Canada. Spring activity date was related...

article

Detecting changes in understorey and canopy vegetation cycles in West Central Alberta using a fusion of Landsat and MODIS

Cameron J. R. McClelland, Nicholas C. Coops, Ethan E. Berman, Sean P. Kearney, more

Applied Vegetation Science > 23 > 2 > 223 - 238

Aims To model regional vegetation cycles through data fusion methods for creating a 30‐m daily vegetation product from 2000 to 2018 and to analyze annual vegetation trends over this time period. Location The Yellowhead Bear Management Area, a 31,180‐km² area in west central Alberta, Canada. Methods In this paper, we use Dynamic Time Warping (DTW) as a data fusion technique to combine Landsat...

article

The utility of terrestrial photogrammetry for assessment of tree volume and taper in boreal mixedwood forests

Christopher Mulverhill, Nicholas C. Coops, Piotr Tompalski, Christopher W. Bater, more

Annals of Forest Science > 2019 > 76 > 3 > 1-12

Key MessageThis study showed that digital terrestrial photogrammetry is able to produce accurate estimates of stem volume and diameter across a range of species and tree sizes that showed strong correspondence when compared with traditional inventory techniques. This paper demonstrates the utility of the technology for characterizing trees in complex habitats such as boreal mixedwood forests. Context...

article

Long-term changes in the primary productivity of migratory caribou (Rangifer tarandus) calving grounds and summer pasture on the Quebec-Labrador Peninsula (Northeastern Canada): the mixed influences of climate change and caribou herbivory

Allen Brett Campeau, Gregory J. M. Rickbeil, Nicholas C. Coops, Steeve D. Côté

Polar Biology > 2019 > 42 > 5 > 1005-1023

At high herbivore density, herbivory can reduce forage abundance, potentially contributing to habitat degradation and driving changes in herbivore population size or range use, in accordance with the exploitation ecosystem hypothesis. The migratory Rivière-George caribou herd (RGH, Rangifer tarandus) of the Quebec-Labrador Peninsula (Canada) has experienced a large decline in population size since...

article

Digital Aerial Photogrammetry for Updating Area-Based Forest Inventories: A Review of Opportunities, Challenges, and Future Directions

Tristan R. H. Goodbody, Nicholas C. Coops, Joanne C. White

Current Forestry Reports > 2019 > 5 > 2 > 55-75

Purpose of Review Three-dimensional (3D) data on forest structure have transformed the level of detail and accuracy of forest information. While these 3D data have primarily been derived from airborne laser scanning (ALS), there has been growing interest in the use of 3D data derived from digital aerial photogrammetry (DAP) and image-matching algorithms. In particular, research and operational forestry...

article

Towards grizzly bear population recovery in a modern landscape

Sean C. P. Coogan, Nicholas C. Coops, David M. Janz, Marc R. L. Cattet, more

Journal of Applied Ecology > 56 > 1 > 93 - 99

article

Confirmation of post-harvest spectral recovery from Landsat time series using measures of forest cover and height derived from airborne laser scanning data

Joanne C. White, Ninni Saarinen, Ville Kankare, Michael A. Wulder, more

Remote Sensing of Environment > 2018 > 216 > C > 262-275

Landsat time series (LTS) enable the characterization of forest recovery post-disturbance over large areas; however, there is a gap in our current knowledge concerning the linkage between spectral measures of recovery derived from LTS and actual manifestations of forest structure in regenerating stands. Airborne laser scanning (ALS) data provide useful measures of forest structure that can be used...

article

Daily estimates of Landsat fractional snow cover driven by MODIS and dynamic time-warping

Ethan E. Berman, Douglas K. Bolton, Nicholas C. Coops, Zoltan K. Mityok, more

Remote Sensing of Environment > 2018 > 216 > C > 635-646

Understanding seasonal snow cover dynamics is critical for management of hydrological regimes, habitat availability for wildlife species, forest fire risk assessment and recreational demands. Although data products provided at 500 m spatial resolution by the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor provide important and readily available information on snow cover, capturing snow...

article

Three decades of forest structural dynamics over Canada's forested ecosystems using Landsat time-series and lidar plots

Giona Matasci, Txomin Hermosilla, Michael A. Wulder, Joanne C. White, more

Remote Sensing of Environment > 2018 > 216 > C > 697-714

Attributes that describe forest structure, such as height, canopy cover, volume, and biomass, are required to inform forest inventories and monitoring programs. Light Detection and Ranging (lidar) has been successfully demonstrated as a means to derive a suite of forest structure attributes at the plot level; however, these acquisitions are often constrained to limited spatial extents and to a given...

article

Mapping tree canopies in urban environments using airborne laser scanning (ALS): a Vancouver case study

Giona Matasci, Nicholas C. Coops, David A. R. Williams, Nick Page

Forest Ecosystems > 2018 > 5 > 1 > 1-9

Background The distribution of forest vegetation within urban environments is critically important as it influences urban environmental conditions and the energy exchange through the absorption of solar radiation and modulation of evapotranspiration. It also plays an important role filtering urban water systems and reducing storm water runoff. Methods We investigate the capacity of ALS data to individually...

article

Digital aerial photogrammetry for assessing cumulative spruce budworm defoliation and enhancing forest inventories at a landscape-level

Tristan R.H. Goodbody, Nicholas C. Coops, Txomin Hermosilla, Piotr Tompalski, more

ISPRS Journal of Photogrammetry and Remote Sensing > 2018 > 142 > C > 1-11

Spruce budworm (Choristoneura fumiferana [Clem.], Lepidoptera: Tortricidae) is a native defoliating insect with an important disturbance role in the eastern boreal forests of North America. With an extensive history of outbreaks and associated impacts on forest structural changes and timber supply, the mapping of spruce budworm defoliation has been of major management importance. In this study we...

article

Disentangling vegetation and climate as drivers of Australian vertebrate richness

Nicholas C. Coops, Gregory J. M. Rickbeil, Douglas K. Bolton, Margaret E. Andrew, more

Ecography > 41 > 7 > 1147 - 1160

Determining drivers of species richness is recognised as highly complex, involving many synergies and interactions. We examine the utility of newly available remote sensing representations of vegetation productivity and vegetation structure to examine drivers of species richness at continental and regional scales. We related richness estimates derived from stacked species distribution models for birds,...

article

Updating stand-level forest inventories using airborne laser scanning and Landsat time series data

Douglas K. Bolton, Joanne C. White, Michael A. Wulder, Nicholas C. Coops, more

International Journal of Applied Earth Observation and Geoinformation > 2018 > 66 > C > 174-183

Vertical forest structure can be mapped over large areas by combining samples of airborne laser scanning (ALS) data with wall-to-wall spatial data, such as Landsat imagery. Here, we use samples of ALS data and Landsat time-series metrics to produce estimates of top height, basal area, and net stem volume for two timber supply areas near Kamloops, British Columbia, Canada, using an imputation approach...

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INFONA - science communication portal

Search results for: Nicholas C. Coops

Facets of functional diversity support niche‐based explanations for Australian biodiversity gradients

Advances in remote sensing of freshwater fish habitat: A systematic review to identify current approaches, strengths and challenges

Picturing local adaptation: Spectral and structural traits from drone remote sensing reveal clinal responses to climate transfer in common‐garden trials of interior spruce (Picea engelmannii × glauca)

Evolutionary history explains foliar spectral differences between arbuscular and ectomycorrhizal plant species

Abundance patterns of mammals across Russia explained by remotely sensed vegetation productivity and snow indices

Predicting leaf traits across functional groups using reflectance spectroscopy

Effects of climate change on forest plantation productivity in Chile

Changing spring snow cover dynamics and early season forage availability affect the behavior of a large carnivore

Detecting changes in understorey and canopy vegetation cycles in West Central Alberta using a fusion of Landsat and MODIS

The utility of terrestrial photogrammetry for assessment of tree volume and taper in boreal mixedwood forests

Long-term changes in the primary productivity of migratory caribou (Rangifer tarandus) calving grounds and summer pasture on the Quebec-Labrador Peninsula (Northeastern Canada): the mixed influences of climate change and caribou herbivory

Digital Aerial Photogrammetry for Updating Area-Based Forest Inventories: A Review of Opportunities, Challenges, and Future Directions

Towards grizzly bear population recovery in a modern landscape

Confirmation of post-harvest spectral recovery from Landsat time series using measures of forest cover and height derived from airborne laser scanning data

Daily estimates of Landsat fractional snow cover driven by MODIS and dynamic time-warping

Three decades of forest structural dynamics over Canada's forested ecosystems using Landsat time-series and lidar plots

Mapping tree canopies in urban environments using airborne laser scanning (ALS): a Vancouver case study

Digital aerial photogrammetry for assessing cumulative spruce budworm defoliation and enhancing forest inventories at a landscape-level

Disentangling vegetation and climate as drivers of Australian vertebrate richness

Updating stand-level forest inventories using airborne laser scanning and Landsat time series data

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