نتایج جستجو برای: natural landscapes

تعداد نتایج: 499527  

Journal: :آب و توسعه پایدار 0
ریحانه مرید افشین دانه کار

in today’s world the concept of “city” without effective landscape is out of imagination. being focal points for human life and activities, cities have to consider the structure and functions which are influenced by natural systems. in this regard, landscapes are inevitable parts of cities with an essential metabolic role. unlike most countries which don’t have to deal with water shortage as a ...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Emily A Martin Björn Reineking Bumsuk Seo Ingolf Steffan-Dewenter

Biological control of pests by natural enemies is a major ecosystem service delivered to agriculture worldwide. Quantifying and predicting its effectiveness at large spatial scales is critical for increased sustainability of agricultural production. Landscape complexity is known to benefit natural enemies, but its effects on interactions between natural enemies and the consequences for crop dam...

Journal: :Genetics 2005
Daniel M Weinreich

Sewall Wright's genotypic fitness landscape makes explicit one mechanism by which epistasis for fitness can constrain evolution by natural selection. Wright distinguished between landscapes possessing multiple fitness peaks and those with only a single peak and emphasized that the former class imposes substantially greater constraint on natural selection. Here I present novel formalism that mor...

2015
J. H. Wang

Fractal analysis has been applied in many fields since it was proposed by Mandelbrot in 1967. Fractal dimension is a basic parameter of fractal analysis. According to the difference of fractal dimensions for images, natural landscapes and urbanscapes could be differentiated, which is of great significance. In this paper, two methods were used for two types of landscape images to discuss the dif...

2014
J. Megan Woltz Douglas A. Landis

1 Arthropod natural enemies provide valuable pest suppression in agricultural landscapes. Natural enemy abundance and diversity within a given crop, in turn, have frequently been shown to be positively related to the amount of semi-natural habitat in the landscape. However, other aspects of landscape structure may also influence natural enemy communities and may be more amenable to management. ...

2015

Current literature on restorative environments generally shows the importance of urban natural landscapes in increasing perceived restorativeness of urban environments. However, little is known about the positive role of visual characteristics of urban natural landscapes in increasing Perceived Restorative Potential (PRP) of urban environments. This study aimed to understand the role of four pr...

2006
Tanja SIMONIČ

In this paper, the idea of considering public preferences in design of urban landscapes as restorative environments is explored. A visual landscape preference research was conducted among user groups in Slovenia. In the study, a questionnaire was used, which was based on a selection of landscape scenes. These represented different types of naturalistic and natural landscapes. Possibilities of a...

Journal: :Frontiers in forests and global change 2021

EDITORIAL article Front. For. Glob. Change, 13 August 2021 | https://doi.org/10.3389/ffgc.2021.735457

2004
Gary Fry

This paper discusses the integration of cultural and natural heritage aspects of landscapes. It presents arguments for the further integration of interests but also points to the potential for conflicts between cultural and natural heritage interests. These are predominantly at the site-management level. The important role of the historical layer is stressed as an integral part of the environme...

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