scholarly journals Long-term and large-scale multispecies dataset tracking population changes of common European breeding birds

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Vojtěch Brlík ◽  
Eva Šilarová ◽  
Jana Škorpilová ◽  
Hany Alonso ◽  
Marc Anton ◽  
...  
Keyword(s):  
Population Size ◽  
Large Scale ◽  
Breeding Birds ◽  
Population Changes ◽  
Size Change ◽  
Relative Population ◽  
Bird Monitoring ◽  
Population Size Change ◽  
Country Specific

AbstractAround fifteen thousand fieldworkers annually count breeding birds using standardized protocols in 28 European countries. The observations are collected by using country-specific and standardized protocols, validated, summarized and finally used for the production of continent-wide annual and long-term indices of population size changes of 170 species. Here, we present the database and provide a detailed summary of the methodology used for fieldwork and calculation of the relative population size change estimates. We also provide a brief overview of how the data are used in research, conservation and policy. We believe this unique database, based on decades of bird monitoring alongside the comprehensive summary of its methodology, will facilitate and encourage further use of the Pan-European Common Bird Monitoring Scheme results.

scholarly journals POPULATION SIZE CHANGE IN RURAL AREAS OF WEST POMERANIAN VOIVODESHIP IN 2011–2014

2018 ◽  
Vol 47 (1) ◽  
pp. 65-72
Author(s):  
Luiza Ossowska ◽  
Natalia Bartkowiak-Bakun
Keyword(s):  
Growth Rate ◽  
Population Size ◽  
Rural Areas ◽  
Population Growth Rate ◽  
Local Level ◽  
Natural Increase ◽  
Demographic Information ◽  
Size Change ◽  
Net Migration ◽  
Population Size Change

The aim of this study is to discuss changes in thepopulation and indicate the main reasons of these changes inrural areas of West Pomeranian voivodeship. The study wasconducted on the local level and based on Central StatisticalOffice data from the years 2010 to 2014. In the first part ofthe research, main demographic information is discussed. Itincludes population density, natural increase per 1000 populationand net migration per 1000 population in rural areasof West Pomeranian voivodeship. In the next part of the research,the average population growth rate was counted in theyears 2011–2014. Based on these changes, researched unitswere divided into four groups – two groups with positivechanges and two groups with negative changes. Subsequently,the main reasons of the changes in population size were analyzedin particular groups including natural increase, migration,population structure by age, level of unemployment andentrepreneurship. All indicators were designated as averagesfrom 2011 to 2014. According to the results in most of the researchunits, the net migration determined the population size.The net migration was characterized by higher absolute valuesthan natural increase. The population size changes are relatedto density. The lowest density areas are more depopulated.Moreover, the population size changes are positive related tothe level of entrepreneurship and negative related to the levelof unemployment.

Multiple Scotlands

2018 ◽  
Author(s):  
Michael Anderson ◽  
Corinne Roughley
Keyword(s):  
Population Size ◽  
Rural Areas ◽  
Large Scale ◽  
Minimum Size ◽  
Agricultural Activity ◽  
Population Changes ◽  
Remote Areas ◽  
Urbanized Areas ◽  
Agrarian Systems ◽  
Over Time

The parish database shows major variations in trends and timings of population changes in less urbanized areas of Scotland. Even within parishes, people increasingly concentrated into larger villages and towns at the expense of more remote areas. The critical minimum size for settlements increased over time, but depended on distance from other larger places and on whether a locality became more than just a centre for agricultural activity. Mining and factory industry were key sources of growth even in many rural areas but caused major legacy problems as they collapsed. Fishing and its related activities increasingly concentrated on a small number of large centres. Transport hubs, administrative and school infrastructure, and large-scale retail facilities were dependent on, but also supported, population size. Agrarian systems varied widely across Scotland and each produced its own pattern of population sex ratios, migration, and change.

MONITORING POPULATION LEVELS OF EIGHT SPECIES OF NOCTUIDS WITH SEX-ATTRACTANT TRAPS IN SOUTHERN ALBERTA, 1978–1983: CONGRUENCY OF YEAR-TO-YEAR FLUCTUATIONS IN INTRASPECIFIC DENSITY SHOWN BY SUBSETS OF MONITORING SITES

1988 ◽  
Vol 120 (12) ◽  
pp. 1071-1078 ◽  
Author(s):  
J.R. Byers ◽  
D.L. Struble ◽  
G.B. Schaalje
Keyword(s):  
Sex Attractant ◽  
Population Estimates ◽  
Pest Species ◽  
Population Changes ◽  
Relative Population ◽  
Southern Alberta ◽  
Resource Requirements ◽  
Long Term Trends

AbstractThe abundance levels of eight species of cutworms and army worms were monitored with sex-attractant traps at 81 locations in a 13 000-km2 area of southern Alberta from 1978 to 1983. Year-to-year change in population levels could be consistently detected by monitoring at a relatively small number of locations. For all species, subsets of selected locations along transects, or random subsets of as few as five locations, showed year-to-year fluctuations in mean catch per trap that were similar in pattern to those of the whole monitored area. The results indicate that long-term surveillance monitoring of pest species of cutworms and armyworms to detect year-to-year population changes, and long-term trends, is feasible in terms of both the resource requirements and reliability of the relative population estimates.

scholarly journals Inferring the History of Population Size Change from Genome-Wide SNP Data

2012 ◽  
Vol 29 (12) ◽  
pp. 3653-3667 ◽  
Author(s):  
Christoph Theunert ◽  
Kun Tang ◽  
Michael Lachmann ◽  
Sile Hu ◽  
Mark Stoneking
Keyword(s):  
Population Size ◽  
Size Change ◽  
Snp Data ◽  
Genome Wide ◽  
History Of ◽  
Population Size Change
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