Correlations between global and regional measures of invasiveness vary with region size
نویسندگان
چکیده
We aimed to assess the utility of the Global Compendium of Weeds (GCW) as an indicator of plant invasiveness, by relating it to invasiveness at smaller scales. We correlated two global measures of invasiveness for alien plant species taken from the GCW (the total number of references for each species and the number of continental areas they are reported from), against distribution data from 18 regions (countries and continents). To investigate relationships between correlation strength and region size and spatial resolution (size of distribution units), we conducted meta-analyses. Finally, invasiveness measures were correlated against the number of habitats occupied by alien plant species and their median abundance in those habitats, in fine-scale vegetation plots in the Czech Republic and the state of Montana (USA). The
منابع مشابه
East Asian Production Networks – The Role and Contribution of SMEs
The Asia-Pacific region generates over half of global economic activity (54.2%) and about 43.7% of global trade, and is the most dynamic region in the global economy. At the core of this is an increasingly dynamic, vibrant and entrepreneurial small-medium sized enterprise sector. Advances in information and communications technology, market liberalisation and moves towards closer regional econo...
متن کاملComparison and Analysis of Road Traffic Injuries in Iran and the Eastern Mediterranean Region: Findings from the Global Status Report on Road Safety–2018
Background and Objectives: The Eastern Mediterranean Region (EMR) has the third highest road traffic fatality rate in the world. This article evaluates the epidemiology of road injuries and some of its main control factors in Iran and compares them with other countries of the EMR. Methods: This study was conducted to analyze and compare traffic injuries resulting in mortality using secondar...
متن کاملSpatiotemporal Discordance in Five Common Measures of Rurality for US Counties and Applications for Health Disparities Research in Older Adults
INTRODUCTION Rural populations face numerous barriers to health, including poorer health care infrastructure, access to care, and other sociodemographic factors largely associated with rurality. Multiple measures of rurality used in the biomedical and public health literature can help assess rural-urban health disparities and may impact the observed associations between rurality and health. Fur...
متن کاملTrade Potential of Turkey with Asia-Pacific Countries: Evidence from Panel Gravity Model
As a result of recent developments, global economic centre of gravity has slide to Asia-Pacific region. It is predicted that Asia-Pacific countries will take place at the first row in global trade and nearly a half of the total trade will intensify in this region at the year 2030. On the other hand, the region covers countries from different levels of development. These features of the region p...
متن کاملFood Losses and Waste: A Global Overview with a Focus on Near East and North Africa Region
Food losses refer to edible food mass decrease throughout the human food chain. Food losses occurring at consumption stage are called food waste. Food Losses and Waste (FLW) represent one of the most critical social, economic and ecological challenges facing humanity, besides being also an ethical issue. FAO data show that roughly one-third of food produced for human consumption is lost or wast...
متن کامل