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Keyword: scale

Simulating groundcover community assembly in a frequently burned ecosystem using a simple neutral model

Publications Posted on: September 14, 2019
Fire is a keystone process that drives patterns of biodiversity globally. In frequently burned fire-dependent ecosystems, surface fire regimes allow for the coexistence of high plant diversity at fine scales even where soils are uniform. The mechanisms on how fire impacts groundcover community dynamics are, however, poorly understood.

Contributions of fire refugia to resilient ponderosa pine and dry mixed-conifer forest landscapes

Publications Posted on: August 06, 2019
Altered fire regimes can drive major and enduring compositional shifts or losses of forest ecosystems. In western North America, ponderosa pine and dry mixed-conifer forest types appear increasingly vulnerable to uncharacteristically extensive, high-severity wildfire.

Improving habitat and connectivity model predictions with multi-scale resource selection functions from two geographic areas

Publications Posted on: April 08, 2019
Context: Habitat loss and fragmentation are the most pressing threats to biodiversity, yet assessing their impacts across broad landscapes is challenging. Information on habitat suitability is sometimes available in the form of a resource selection function model developed from a different geographical area, but its applicability is unknown until tested.

Assessments for ecological stewardship

Publications Posted on: March 30, 2018
Depending on the agency, discipline, or audience, assessments supply data and information to address relevant policy questions and to help make decisions (Streets 1989, Thorton et al. 1994). Data collected in assessments estimate, measure, appraise, rate, characterize, or describe various resource conditions.

Principles and practices for the restoration of ponderosa pine and dry mixed-conifer forests of the Colorado Front Range

Publications Posted on: January 26, 2018
Wildfires have become larger and more severe over the past several decades on Colorado’s Front Range, catalyzing greater investments in forest management intended to mitigate wildfire risks. The complex ecological, social, and political context of the Front Range, however, makes forest management challenging, especially where multiple management goals including forest restoration exist.

Sampling scales define occupancy and underlying occupancy-abundance relationships in animals

Publications Posted on: January 09, 2018
Occupancy-abundance (OA) relationships are a foundational ecological phenomenon and field of study, and occupancy models are increasingly used to track population trends and understand ecological interactions. However, these two fields of ecological inquiry remain largely isolated, despite growing appreciation of the importance of integration.

Land cover dynamics across the Great Plains and their influence on breeding birds: Potential artefact of data and analysis limitations

Publications Posted on: August 22, 2017
The distribution and abundance of obligate grassland breeding birds in the US have declined across the Great Plains as native habitats have been converted to intensive human land use. A major finding of Scholtz et al. (2017: Table 3) was that the group-wise extinction rate among 13 common grassland nesting birds declined with increasing cropland.

Multi-scale habitat selection modeling: A review and outlook

Publications Posted on: September 16, 2016
Scale is the lens that focuses ecological relationships. Organisms select habitat at multiple hierarchical levels and at different spatial and/or temporal scales within each level. Failure to properly address scale dependence can result in incorrect inferences in multi-scale habitat selection modeling studies.

Multi-scale Mexican spotted owl (Strix occidentalis lucida) nest/roost habitat selection in Arizona and a comparison with single-scale modeling results

Publications Posted on: June 24, 2016
Efficacy of future habitat selection studies will benefit by taking a multi-scale approach. In addition to potentially providing increased explanatory power and predictive capacity, multi-scale habitat models enhance our understanding of the scales at which species respond to their environment, which is critical knowledge required to implement effective conservation and management strategies.

Synthesising empirical results to improve predictions of post-wildfire runoff and erosion response

Publications Posted on: June 24, 2016
Advances in research into wildfire impacts on runoff and erosion have demonstrated increasing complexity of controlling factors and responses, which, combined with changing fire frequency, present challenges for modellers. We convened a conference attended by experts and practitioners in post-wildfire impacts, meteorology and related research, including modelling, to focus on priority research issues.