نتایج جستجو برای: ecological patch

تعداد نتایج: 141485  

Journal: :Journal of evolutionary biology 2010
J M Robertson E B Rosenblum

The evolution of intersexual interactions, like mate choice, during ecological speciation has received widespread attention. However, changes in intrasexual interactions, like male territoriality, during ecological divergence are largely unexamined. We conducted field experiments with adaptively diverged populations of the eastern fence lizard (Sceloporus undulatus) to determine whether territo...

2011
A. Jentsch

1. Part A: Concepts and Theory Relating Disturbance Ecology to Restoration 1.1 The general role of disturbance in restoration 1.2 Continuous versus discrete processes in ecosystem dynamics 1.3 Significance of disturbance for ecosystem dynamics 1.4 Disturbance definition 1.5 The patch and multi-patch concept 1.6 Disturbance as a filter in community assembly and a tool in restoration 1.7 Dynamic ...

2016
Chun-Yi Chang Dustin J Marshall

Making links between ecological processes and the scales at which they operate is an enduring challenge of community ecology. Our understanding of ecological communities cannot advance if we do not distinguish larger scale processes from smaller ones. Variability at small spatial scales can be important because it carries information about biological interactions, which cannot be explained by e...

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...

For an optimum use of natural resources in the sustainable development trend, there is a need to identify ecological resources in the shortest period of time and minimum possible cost. In this article, we aimed Management ecosystem by Assessment of plant covers changes at Taleghan Township in a twenty year period. Percentage of landscape and number of patch were among the metrics that were calc...

2006
PENN LLOYD THOMAS E. MARTIN ROLAND L. REDMOND MELISSA M. HART UTE LANGNER RONALD D. BASSAR

Ecological processes are dependent on the spatial and temporal scale at which they are viewed, and a process at any one scale may be influenced by factors at other scales. Thus, an ecological process at a broader scale may act to constrain processes at finer scales (Allen and Starr 1982, Thompson et al. 2000). Developing a full understanding of the spatial scales at which habitat conditions imp...

Journal: :Remote Sensing 2014
Weiqi Zhou Mary L. Cadenasso Kirsten Schwarz Steward T. A. Pickett

Describing and quantifying the spatial heterogeneity of land cover in urban systems is crucial for developing an ecological understanding of cities. This paper presents a new approach to quantifying the fine-scale heterogeneity in urban landscapes that capitalizes on the strengths of two commonly used approaches—visual interpretation and object-based image analysis. This new approach integrates...

2001
James N. Sanchirico James E. Wilen

This paper employs a dynamic and spatial model of renewable resource exploitation to investigate the effects of marine reserve creation. The model combines a metapopulation model incorporating resource patch heterogeneity and dispersal with a behaviorally based spatially explicit harvesting model that assumes that fishermen choose location in a manner that eliminates spatial arbitrage opportuni...

2015
Paul C. Stoy Tristan Quaife Quazi K. Hassan

Upscaling ecological information to larger scales in space and downscaling remote sensing observations or model simulations to finer scales remain grand challenges in Earth system science. Downscaling often involves inferring subgrid information from coarse-scale data, and such ill-posed problems are classically addressed using regularization. Here, we apply two-dimensional Tikhonov Regularizat...

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