نتایج جستجو برای: habitat variables

تعداد نتایج: 364517  

2014
John M. Guinotte Andrew J. Davies

Regional scale habitat suitability models provide finer scale resolution and more focused predictions of where organisms may occur. Previous modelling approaches have focused primarily on local and/or global scales, while regional scale models have been relatively few. In this study, regional scale predictive habitat models are presented for deep-sea corals for the U.S. West Coast (California, ...

Journal: :Environmental management 2005
Emmanuel A Frimpong Trent M Sutton Bernard A Engel Thomas P Simon

A common theme in recent landscape studies is the comparison of riparian and watershed land use as predictors of stream health. The objective of this study was to compare the performance of reach-scale habitat and remotely assessed watershed-scale habitat as predictors of stream health over varying spatial extents. Stream health was measured with scores on a fish index of biotic integrity (IBI)...

Journal: :Environmental management 2010
Stephen S Warrner Robert U Fischer Ann M Holtrop Leon C Hinz James M Novak

Stream habitat assessments are conducted to evaluate biological potential, determine anthropogenic impacts, and guide restoration projects. Utilizing these procedures, managers must first select a representative stream reach, which is typically selected based on several criteria. To develop a consistent and unbiased procedure for choosing sampling locations, the Illinois Department of Natural R...

Journal: :Ecological Informatics 2007
Kathleen M. Bergen Amy M. Gilboy Daniel G. Brown

Article history: Received 31 December 2006 Accepted 2 January 2007 The goal of this study was to evaluate the contributions of forest and landscape structure derived from remote sensing instruments to habitatmapping. Our empirical data focused at the landscape scale on a test site in northern Michigan, using radar and Landsat imagery and bird-presence data by species. We tested the contribution...

2014
TRAVIS O. BRENDEN LIZHU WANG RICHARD D. CLARK PAUL W. SEELBACH JOHN LYONS

—The use of model-predicted, local-scale habitat data as inputs in analyses intended to evaluate multiscale fish assemblage–habitat relationships in streams has become increasingly common as the scale at which such studies are conducted has increased. We used fish assemblage and habitat data from 208 wadeable streams in Wisconsin and Michigan to determine whether model-predicted habitat data wo...

2002
JEREMY W. LICHSTEIN THEODORE R. SIMONS KATHLEEN E. FRANZREB

We examined the relationship between songbird relative abundance and local and landscape-scale habitat variables in two predominately midto late-successional managed National Forests in the southern Appalachian Mountains, USA. We used partialregression analysis to remove correlations between habitat variables measured at different spatial scales (local habitat and square landscape regions with ...

2007
Kathleen M. Bergen Kathleen Bergen Amy M. Gilboy Daniel G. Brown

Article history: Received 31 December 2006 Accepted 2 January 2007 RR EC TE D PR O The goal of this study was to evaluate the contributions of forest and landscape structure derived from remote sensing instruments to habitatmapping. Our empirical data focused at the landscape scale on a test site in northern Michigan, using radar and Landsat imagery and bird-presence data by species. We tested ...

2016
Bradley A. Strickland Francisco J. Vilella Jerrold L. Belant

Habitat selection is an active behavioral process that may vary across spatial and temporal scales. Animals choose an area of primary utilization (i.e., home range) then make decisions focused on resource needs within patches. Dominance may affect the spatial distribution of conspecifics and concomitant habitat selection. Size-dependent social dominance hierarchies have been documented in capti...

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