Results 1 to 10 of about 8,801,172 (235)

Effects of High Ammonium Loading on Two Submersed Macrophytes of Different Growth Form Based on an 18-Month Pond Experiment

open access: yesFrontiers in Plant Science, 2022
Ammonium (NH4-N) produces a paradoxical effect on submersed macrophytes because it is not only the preferred nitrogen source for the growth of plants but also threatens the growth of plants at high concentration.
Qing Yu   +17 more
doaj   +1 more source

Migration Processes – Challenges for German Cities

open access: yesEuropean Journal of Spatial Development, 2021
In recent years, demographic processes have rightly attracted growing attention. In addition to the natural development of the population (with the phenomena of population decline and over aging), the various forms of migration (international and inter ...
Heinrich Mäding
doaj   +1 more source

Effects of geo‐climate factors on phenotypic variation in cone and seed traits of Pinus yunnanensis

open access: yesEcology and Evolution, 2023
Evaluating variations in reproductive traits and the response of the variations to geo‐climate conditions are essential for understanding the persistence, evolution, and range dynamics of plant populations.
Chengjie Gao   +5 more
doaj   +1 more source

Demographic Development of a Region: Conceptual Framework and Management Model [PDF]

open access: yesAlterEconomics
Regional demographic development is a key driver of socio-economic stability and sustainable growth. In light of global challenges such as population aging, declining birth rates, and migration, effective demographic management is increasingly important.
Natalia P. Neklyudova
doaj   +1 more source

Population and Development [PDF]

open access: yesScience, 2011
As the world's population reaches 7 billion this year, we should reflect on the many ways in which population dynamics matter to the planet's future. Population growth patterns are linked to nearly every challenge confronting humanity, including poverty reduction, urban pollution, energy production, food and water scarcity, and health.
openaire   +2 more sources

Demographic development in selected microregions

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2011
The paper is aimed at the population development analysis of the Běleč, Lučina, Cézava and Podluží regions. In the studied period an increase in the mid-year population occurred, the proportion of women was predominant.
Milan Palát
doaj   +1 more source

Rising trend of childlessness in China: analysis of social and regional disparities with 2010 and 2020 census data

open access: yesBMJ Open, 2023
Introduction In recent decades, there has been a significant increase in childlessness. This paper analysed childlessness in China, specifically examining its socio and regional disparities.Methods With data from China’s 2020 population census ...
Yu Jiang   +4 more
doaj   +1 more source

Population Development of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) under Simulated UK Glasshouse Conditions

open access: yesInsects, 2013
Tomato leafminer Tuta absoluta (Meyrick) is a major pest of tomato plants in South America. It was first recorded in the UK in 2009 where it has been subjected to eradication policies. The current work outlines T.
Phil Northing   +6 more
doaj   +1 more source

Assessment of nutritional status using anthropometric index among older adult and elderly population in India

open access: yesScientific Reports, 2023
Malnutrition poses a significant risk to the older population globally, highlighting the critical role of nutrition in healthy aging. In this study, the aim is to estimate the prevalence of malnutrition among older adults aged 45–59 years and the elderly
Junaid Khan   +2 more
doaj   +1 more source

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