نتایج جستجو برای: vegetation patches

تعداد نتایج: 70020  

2016
Shonil A. Bhagwat Sandra Nogué Katherine J. Willis

Sacred forest groves in the Western Ghats of India are small fragments of tropical forest that have received protection due to religious beliefs and cultural practices. These forest fragments are an example of community-based conservation and they serve as refugia for many forest-dwelling species in otherwise highly anthropogenic tropical forest-agriculture landscapes of the Indian Western Ghat...

Adverse changes in rangeland vegetation can be considered as one of the criteria for land degradation. Some of these changes can be evaluated through monitoring the spatial changes of landscape parameters. This study aimed to investigate the landscape changes in Kezab rangelands of Yazd province, central Iran. Landsat satellite images of 1990, 2002, and 2013, and landscape metrics including Tot...

Journal: :international journal of environmental research 0
m. r. masnavi university of tehran, iran h. tasa university of tehran, iran m. ghobadi university of lorestan, iran m. r. farzad behtash tehran urban planning and research center, iran s. negin taji tehran urban planning and research center, iran

tehran city has been subject of critical environmental challenges during the course of 20th. century namely: massive population growth, broad expansion, reduction in urban open/green spaces, increasing in energy consumption and waste production. releasing industrial wastewater into river valleys have led to considerable changes in structure of city's natural landscape. the natural structur...

Journal: :Plant Ecology 2021

Dry grasslands are not only amongst the most species-rich habitats in Europe but also threatened. Threats include habitat destruction as well modification to historic disturbance regime under which native plants have evolved (e.g. too high or low levels of disturbance). The aim this study is examine effects soil intensity on species composition and diversity a dry grassland Mols Bjerge National...

2008
A. D. Davidson D. C. Lightfoot

Animals that modify their environment through engineering and herbivory have important impacts on ecosystems, yet the interactive roles of such species have rarely been studied. We studied the comparative and interactive effects of two burrowing herbivorous rodents, Gunnison’s prairie dogs (Cynomys gunnisoni) and banner-tailed kangaroo rats (Dipodomys spectabilis), on vegetation where they co-o...

2003
Brett J. Goodwin Lenore Fahrig

We investigated the impact of landscape structure on landscape connectivity using a combination of simulation and empirical experiments. In a previous study we documented the movement behaviour of a specialized goldenrod beetle (Trirhabda borealis Blake) in three kinds of patches: habitat (goldenrod) patches and two types of matrix patch (cut vegetation and cut vegetation containing camouflage ...

2012
Luis Daniel Avila-Cabadilla Gerardo Arturo Sanchez-Azofeifa Kathryn Elizabeth Stoner Mariana Yolotl Alvarez-Añorve Mauricio Quesada Carlos Alonso Portillo-Quintero

Neotropical forests are being increasingly replaced by a mosaic of patches of different successional stages, agricultural fields and pasture lands. Consequently, the identification of factors shaping the performance of taxa in anthropogenic landscapes is gaining importance, especially for taxa playing critical roles in ecosystem functioning. As phyllostomid bats provide important ecological ser...

2002
Louis R. Iverson

The Illinois Geographic Information System was used to compare the soil and landscape attributes of the State with its historic vegetation, current land use, and patterns of land-use change over the past 160 years. Patch structural characteristics among land types in four geographic zones were also compared. The assessment of patch characteristics revealed a highly modified State with most land...

2017
Cyril Campana Stéphanie Gauvin Jean-François Ponge

Micro-scale changes in earthworm communities and ground cover types were studied along five transect lines in an unmanaged beech forest (Fontainebleau forest, France). Spatial patterns were interpreted to the light of interactions between earthworm species and forest architecture, ground vegetation and quantity as well as quality of litter. The anecic Lumbricus terrestris was associated with pa...

2017
Miriam A. Zemanova Humberto L. Perotto-Baldivieso Emily L. Dickins Andrew B. Gill John P. Leonard David B. Wester

Introduction: Deforestation significantly impacts large carnivores that depend on large tracts of interconnected forest habitat and that are sensitive to human activities. Understanding the relationship between habitat use and spatial distribution of such species across human modified landscapes is critical when planning effective conservation strategies. This study assessed the presence of pot...

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