scholarly journals Distribution and Abundance of Westslope Cutthroat Trout in Relation to Habitat Characteristics at Multiple Spatial Scales

2020 ◽  
Vol 40 (4) ◽  
pp. 893-909
Author(s):  
John W. Heckel ◽  
Michael C. Quist ◽  
Carson J. Watkins ◽  
Andrew M. Dux
Keyword(s):  
Spatial Scales ◽  
Cutthroat Trout ◽  
Habitat Characteristics ◽  
Westslope Cutthroat Trout ◽  
Multiple Spatial Scales

scholarly journals Relative importance of habitat characteristics at multiple spatial scales for wood-dependent beetles in boreal forest

2015 ◽  
Vol 30 (10) ◽  
pp. 1931-1942 ◽  
Author(s):  
Thomas Ranius ◽  
Victor Johansson ◽  
Martin Schroeder ◽  
Alexandro Caruso
Keyword(s):  
Boreal Forest ◽  
Spatial Scales ◽  
Habitat Characteristics ◽  
Relative Importance ◽  
Multiple Spatial Scales

Influences of sociality and habitat on African mole-rat burrowing patterns

2005 ◽  
Vol 83 (8) ◽  
pp. 1051-1058 ◽  
Author(s):  
Stephanie S Romañach
Keyword(s):  
Soil Moisture ◽  
Spatial Patterns ◽  
Resource Availability ◽  
Spatial Scales ◽  
Habitat Characteristics ◽  
Subterranean Rodents ◽  
Habitat Types ◽  
Multiple Spatial Scales ◽  
Social Species ◽  
Mole Rat

The movement choices that animals make are influenced by many factors including resource availability, which in turn can affect whether the animals search for resources alone or in groups. Subterranean rodents are ideal for examining movement paths because they create burrows that persist for extended periods and thus serve as records of movement. African mole-rat species (Bathyergidae) are solitary, social, or eusocial, and inhabit a variety of habitat types. In this study, mole-rat burrowing patterns were examined by analyzing the spatial patterns of the soil mounds that they create as they burrow. Mound spatial patterns were examined for solitary and social species occurring in two habitats, which differed in rainfall, soil moisture, and vegetation availability. Examination of mound spatial patterns at multiple spatial scales revealed that mounds of single burrow systems were clustered at small spatial scales (<6 m), while mounds were not clustered at the larger spatial scales of the entire burrow systems. Spatial patterns of mounds did not differ in relation to sociality or habitat characteristics. These findings, as well as evidence from other taxa, may suggest common burrowing strategies for subterranean rodents.

scholarly journals Midge distribution patterns at multiple spatial scales in shallow Finnish lakes revealed through sedimentary records

2019 ◽  
Vol 23 (2) ◽  
Author(s):  
Tomi Luoto ◽  
Liisa Nevalainen ◽  
Veli-Pekka Salonen
Keyword(s):  
Spatial Scales ◽  
Regional Scale ◽  
Environmental Parameters ◽  
Distribution Patterns ◽  
Habitat Characteristics ◽  
Site Specific ◽  
Climate Conditions ◽  
Sedimentary Records ◽  
Multiple Spatial Scales ◽  
Eastern Finland

This study was based on sedimentarymidge (Diptera:Nematocera) assemblages from multilake datasets along environmental transects from Finland (regional), southern Finland (semiregional), and Helsinki district (local) and an intralake dataset from eastern Finland (site-specific). The aim was to examine scale-dependencies in midge distribution. The results imply that distribution and abundance of midge taxa are related to scale: on the regional scale the forcing factors are related to prevailing climate conditions, on semiregional scale they are related to water quality, on more local scales predation pressure is the key variable and on site-specific scales habitat characteristics determine the species assemblages. Although the number of study siteswas not equal and not all environmental parameters were possible to measure fromall spatial scales, it is apparent that caution is required in midge-based environmental assessments, because changes in faunal composition are driven by factors operating at different spatial scales.

Inhibition of coral settlement at multiple spatial scales by a pervasive algal competitor

2019 ◽  
Vol 612 ◽  
pp. 29-42 ◽  
Author(s):  
NR Evensen ◽  
C Doropoulos ◽  
KM Morrow ◽  
CA Motti ◽  
PJ Mumby
Keyword(s):  
Spatial Scales ◽  
Coral Settlement ◽  
Multiple Spatial Scales

Assessment of clogging in constructed wetlands by saturated hydraulic conductivity measurements

2019 ◽  
Vol 79 (2) ◽  
pp. 314-322 ◽  
Author(s):  
F. Licciardello ◽  
R. Aiello ◽  
V. Alagna ◽  
M. Iovino ◽  
D. Ventura ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Hydraulic Conductivity ◽  
Constructed Wetlands ◽  
Spatial Scales ◽  
Pilot Scale ◽  
Laboratory Scale ◽  
Test Method ◽  
Conductivity Measurements ◽  
Multiple Spatial Scales ◽  
Ks Values

Abstract This study aims at defining a methodology to evaluate Ks reductions of gravel material constituting constructed wetland (CW) bed matrices. Several schemes and equations for the Lefranc's test were compared by using different gravel sizes and at multiple spatial scales. The falling-head test method was implemented by using two steel permeameters: one impervious (IMP) and one pervious (P) on one side. At laboratory scale, mean K values for a small size gravel (8–15 × 10−2 m) measured by the IMP and the P permeameters were equal to 19,466 m/d and 30,662 m/d, respectively. Mean Ks values for a big size gravel (10–25 × 10−2 m) measured by the IMP and the P permeameters were equal to 12,135 m/d and 20,866 m/d, respectively. Comparison of Ks values obtained by the two permeameters at laboratory scale as well as a sensitivity analysis and a calibration, lead to the modification of the standpipe equation, to evaluate also the temporal variation of the horizontal Ks. In particular, both permeameters allow the evaluation of the Ks decreasing after 4 years-operation and 1–1.5 years' operation of the plants at full scale (filled with the small size gravel) and at pilot scale (filled with the big size gravel), respectively.

scholarly journals FORMULATION OF THE HEAT CONDUCTION EQUATION FOR HETEROGENEOUS MEDIA WITH MULTIPLE SPATIAL SCALES USING REITERATED HOMOGENIZATION

2016 ◽  
Vol 15 (1) ◽  
pp. 96
Author(s):  
E. Iglesias-Rodríguez ◽  
M. E. Cruz ◽  
J. Bravo-Castillero ◽  
R. Guinovart-Díaz ◽  
R. Rodríguez-Ramos ◽  
...  
Keyword(s):  
Heat Conduction ◽  
Small Parameter ◽  
Heat Conduction Equation ◽  
Heterogeneous Media ◽  
Spatial Scales ◽  
Conduction Equation ◽  
Small Scale ◽  
Multiple Spatial Scales ◽  
Effective Coefficients ◽  
Reiterated Homogenization

Heterogeneous media with multiple spatial scales are finding increased importance in engineering. An example might be a large scale, otherwise homogeneous medium filled with dispersed small-scale particles that form aggregate structures at an intermediate scale. The objective in this paper is to formulate the strong-form Fourier heat conduction equation for such media using the method of reiterated homogenization. The phases are assumed to have a perfect thermal contact at the interface. The ratio of two successive length scales of the medium is a constant small parameter ε. The method is an up-scaling procedure that writes the temperature field as an asymptotic multiple-scale expansion in powers of the small parameter ε . The technique leads to two pairs of local and homogenized equations, linked by effective coefficients. In this manner the medium behavior at the smallest scales is seen to affect the macroscale behavior, which is the main interest in engineering. To facilitate the physical understanding of the formulation, an analytical solution is obtained for the heat conduction equation in a functionally graded material (FGM). The approach presented here may serve as a basis for future efforts to numerically compute effective properties of heterogeneous media with multiple spatial scales.

Applying systematic conservation planning to improve the allocation of restoration actions at multiple spatial scales

2021 ◽  
Author(s):  
Ben L. Gilby ◽  
Andrew D. Olds ◽  
Christopher J. Brown ◽  
Rod M. Connolly ◽  
Christopher J. Henderson ◽  
...  
Keyword(s):  
Conservation Planning ◽  
Spatial Scales ◽  
Systematic Conservation Planning ◽  
Multiple Spatial Scales
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