نتایج جستجو برای: habitat parameters

تعداد نتایج: 630563  

2012
Chandima D. Dangalle Nirmalie Pallewatta Alfried P. Vogler

Body size is an important feature of an animal that is linked with its life history, morphology, physiology and ecology. Understanding the association between body size and habitat type of an animal and the underlying causes for this are important for determining their distribution. The present study examines the association between body size and habitat types of tiger beetles in Sri Lanka and ...

2014
ALESSIO MORTELLITI GIULIA SOZIO DON A. DRISCOLL LUCIANO BANI LUIGI BOITANI DAVID B. LINDENMAYER

Patch size, isolation and quality are key factors influencing species persistence in fragmented landscapes. However, we still lack a detailed understanding of how these variables exert their effects on populations inhabiting fragmented landscapes. At which ecological scale do they have an effect (e.g., individuals versus populations) and, on which demographic parameters? Answering these questio...

2004

Habitat suitability modeling (HSM) is a tool for predicting the quality or suitability of habitat for a given species based on known affinities with habitat characteristics, such as depth and substrate type. This information is combined with maps of those same habitat characteristics to produce maps of expected distributions of species and life stages. One such technique is termed habitat suita...

Journal: :Remote Sensing 2015
András Zlinszky Hermann Heilmeier Heiko Balzter Bálint Czúcz Norbert Pfeifer

Habitat quality is the ability of the environment to provide conditions appropriate for individual and species persistence. Measuring or monitoring habitat quality requires complex integration of many properties of the ecosystem, where traditional terrestrial data collection methods have proven extremely time-demanding. Remote sensing has known potential to map various ecosystem properties, als...

Journal: :Ecology 2009
Jenny A Hodgson Atte Moilanen Chris D Thomas

Many species have to track changes in the spatial distribution of suitable habitat from generation to generation. Understanding the dynamics of such species will likely require spatially explicit models, and patch-based metapopulation models are potentially appropriate. However, relatively little attention has been paid to developing metapopulation models that include habitat dynamics, and very...

2011
Franck A. Hollander Hans Van Dyck Gilles San Martin Nicolas Titeux

In human-altered environments, organisms may preferentially settle in poor-quality habitats where fitness returns are lower relative to available higher-quality habitats. Such ecological trapping is due to a mismatch between the cues used during habitat selection and the habitat quality. Maladaptive settlement decisions may occur when organisms are time-constrained and have to rapidly evaluate ...

2011
Peter Maciej Julia Fischer Kurt Hammerschmidt

Acoustic analyses have become a staple method in field studies of animal vocal communication, with nearly all investigations using computer-based approaches to extract specific features from sounds. Various algorithms can be used to extract acoustic variables that may then be related to variables such as individual identity, context or reproductive state. Habitat structure and recording conditi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بیرجند 1389

there has been a gradual shift of focus from the study of rule systems, which have increasingly been regarded as impoverished, … to the study of systems of principles, which appear to occupy a much more central position in determining the character and variety of possible human languages. there is a set of absolute universals, notions and principles existing in ug which do not vary from one ...

Journal: :Chaos 2013
Sean Kramer Erik M Bollt

Given multiple images that describe chaotic reaction-diffusion dynamics, parameters of a partial differential equation (PDE) model are estimated using autosynchronization, where parameters are controlled by synchronization of the model to the observed data. A two-component system of predator-prey reaction-diffusion PDEs is used with spatially dependent parameters to benchmark the methods descri...

Journal: :Current Biology 2014
James L. Gould

Before migrating from their home streams to the ocean, young Pacific salmon already know the magnetic parameters of their feeding grounds, allowing them to steer into a favorable habitat. What kind of 'map' representation underlies this remarkable ability?

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