Landscape and ecological differentiation of the fauna and bird population of Urup island (Big Kuril ridge)

2021 ◽  
Keyword(s):  
Ecological Differentiation ◽  
Bird Population ◽  
Kuril Ridge

Geographical and ecological differentiation in Italian mesophilous pastures referred to the alliance Cynosurion cristati Tx. 1947

2012 ◽  
Vol 41 (4) ◽  
pp. 217-229 ◽  
Author(s):  
C. Blasi ◽  
A. Tilia ◽  
L. Rosati ◽  
E. Del Vico ◽  
R. Copiz ◽  
...  
Keyword(s):  
Ecological Differentiation

Bird population declines due to radiation exposure at Chernobyl are stronger in species with pheomelanin-based coloration

Oecologia ◽  
2010 ◽  
Vol 165 (4) ◽  
pp. 827-835 ◽  
Author(s):  
Ismael Galván ◽  
Timothy A. Mousseau ◽  
Anders P. Møller
Keyword(s):  
Radiation Exposure ◽  
Population Declines ◽  
Bird Population

Divorce in an Island Bird Population: Causes, Consequences, and Lack of Inheritance

2017 ◽  
Vol 190 (4) ◽  
pp. 557-569 ◽  
Author(s):  
Nathaniel T. Wheelwright ◽  
Céline Teplitsky
Keyword(s):  
Bird Population

scholarly journals Ecological differentiation facilitates fine‐scale coexistence of sexual and asexualBoechera

2018 ◽  
Author(s):  
Catherine A. Rushworth ◽  
Michael D. Windham ◽  
Rose A. Keith ◽  
Tom Mitchell‐Olds
Keyword(s):  
Fine Scale ◽  
Ecological Differentiation

scholarly journals A first survey of the global population size and distribution of the Scottish Crossbill Loxia scotica

2010 ◽  
Vol 21 (2) ◽  
pp. 186-198 ◽  
Author(s):  
RON W. SUMMERS ◽  
STEPHEN T. BUCKLAND
Keyword(s):  
Population Size ◽  
Habitat Management ◽  
Disjunct Distribution ◽  
Population Estimates ◽  
Modal Number ◽  
Habitat Requirement ◽  
Bird Population ◽  
Different Seasons ◽  
Common Crossbill ◽  
Global Population

SummaryA survey of Scottish Crossbills Loxia scotica was carried out in 3,506 km2 of conifer woodland in northern Scotland during January to April 2008 to provide the first estimate of the global population size for this endemic bird. Population estimates were also made for Common Crossbills L. curvirostra and Parrot Crossbills L. pytyopsittacus within this range. Crossbills were lured to systematically selected survey points for counting, sexing and recording their calls for later call-type (species) identification from sonograms. Crossbills were located at 451 of the 852 survey points, and adequate tape-recordings made at 387 of these. The Scottish Crossbill had a disjunct distribution, occurring largely within the eastern part of the study area, but also in the northwest. Common Crossbills had a mainly westerly distribution. The population size of post-juvenile Scottish Crossbills was estimated as 13,600 (95% C.I. 8,130–22,700), which will approximate to 6,800 (4,065–11,350) pairs. Common Crossbills were more abundant within this range (27,100, 95% C.I. 14,700–38,400) and Parrot Crossbills rare (about 100). The sex ratio was not significantly different from parity for Scottish Crossbills. The modal number at survey points was two but numbers were larger in January than later in the survey. The numbers and distribution of all crossbill species are likely to vary between years, depending upon the size of the cone crops of the different conifers: all were coning in 2008. Common Crossbill and Parrot Crossbill numbers will also be affected by irruptions from continental Europe. A monitoring scheme is required to detect any population trend, and further work on their habitat requirement (e.g. conifer selection at different seasons) is needed to inform habitat management of native and planted conifer forests to ensure a secure future for this endemic bird.

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