Population dynamics of an expanding passerine at the distribution margin
Individuals may be maladapted to novel environments at the species' distribution margin. We investigated population dynamics in a marginal habitat where reproduction has been proven poor. Survival, population growth rate (λ) and its components, breeding and natal dispersal were studied in great...
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Online Access: | http://hdl.handle.net/10261/67446 https://doi.org/10.1111/j.1600-048X.2011.05376.x |
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ftcsic:oai:digital.csic.es:10261/67446 2024-02-11T10:07:06+01:00 Population dynamics of an expanding passerine at the distribution margin Karvonen, J. Orell, M. Rytkönen, S. Broggi, Juli Belda, Eduardo 2012 http://hdl.handle.net/10261/67446 https://doi.org/10.1111/j.1600-048X.2011.05376.x en eng Blackwell Publishing doi:10.1111/j.1600-048X.2011.05376.x issn: 0908-8857 Journal of Avian Biology 43: 102- 108 (2012) http://hdl.handle.net/10261/67446 open artículo http://purl.org/coar/resource_type/c_6501 2012 ftcsic https://doi.org/10.1111/j.1600-048X.2011.05376.x 2024-01-16T09:45:47Z Individuals may be maladapted to novel environments at the species' distribution margin. We investigated population dynamics in a marginal habitat where reproduction has been proven poor. Survival, population growth rate (λ) and its components, breeding and natal dispersal were studied in great tits Parus major breeding at the northern margin of its distribution in northern Finland. We used long term capture-mark-recapture data sets. Study area size and population density were used to explain adult survival rates. The average annual estimates of adult survival rose from 0.371 to 0.388 between the periods of 1971-1984 and 1999-2009. The estimates are slightly lower than estimates of small passerines in Europe. Low local survival rate of fledglings (0.050-0.055) probably reflects intensified emigration from this low quality area. Temporal variation in λ was large (0.498-1.856). Despite of low adult survival and recruitment rates, the mean estimates of λ (1.008 and 1.033) indicate an overall stability in the population size. Indeed, our results suggest that the immigration has an important role in the population dynamics of northern great tits. Thus the population is demographically and genetically dependent on core habitats which may cause adaptive problems due to intensive gene flow. Given those limitations, options for evolution of local adaptations in northern distribution margins are discussed. © 2012 The Authors. Peer Reviewed Article in Journal/Newspaper Northern Finland Digital.CSIC (Spanish National Research Council) Parus ENVELOPE(3.950,3.950,-71.983,-71.983) Journal of Avian Biology 43 2 102 108 |
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Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
Individuals may be maladapted to novel environments at the species' distribution margin. We investigated population dynamics in a marginal habitat where reproduction has been proven poor. Survival, population growth rate (λ) and its components, breeding and natal dispersal were studied in great tits Parus major breeding at the northern margin of its distribution in northern Finland. We used long term capture-mark-recapture data sets. Study area size and population density were used to explain adult survival rates. The average annual estimates of adult survival rose from 0.371 to 0.388 between the periods of 1971-1984 and 1999-2009. The estimates are slightly lower than estimates of small passerines in Europe. Low local survival rate of fledglings (0.050-0.055) probably reflects intensified emigration from this low quality area. Temporal variation in λ was large (0.498-1.856). Despite of low adult survival and recruitment rates, the mean estimates of λ (1.008 and 1.033) indicate an overall stability in the population size. Indeed, our results suggest that the immigration has an important role in the population dynamics of northern great tits. Thus the population is demographically and genetically dependent on core habitats which may cause adaptive problems due to intensive gene flow. Given those limitations, options for evolution of local adaptations in northern distribution margins are discussed. © 2012 The Authors. Peer Reviewed |
format |
Article in Journal/Newspaper |
author |
Karvonen, J. Orell, M. Rytkönen, S. Broggi, Juli Belda, Eduardo |
spellingShingle |
Karvonen, J. Orell, M. Rytkönen, S. Broggi, Juli Belda, Eduardo Population dynamics of an expanding passerine at the distribution margin |
author_facet |
Karvonen, J. Orell, M. Rytkönen, S. Broggi, Juli Belda, Eduardo |
author_sort |
Karvonen, J. |
title |
Population dynamics of an expanding passerine at the distribution margin |
title_short |
Population dynamics of an expanding passerine at the distribution margin |
title_full |
Population dynamics of an expanding passerine at the distribution margin |
title_fullStr |
Population dynamics of an expanding passerine at the distribution margin |
title_full_unstemmed |
Population dynamics of an expanding passerine at the distribution margin |
title_sort |
population dynamics of an expanding passerine at the distribution margin |
publisher |
Blackwell Publishing |
publishDate |
2012 |
url |
http://hdl.handle.net/10261/67446 https://doi.org/10.1111/j.1600-048X.2011.05376.x |
long_lat |
ENVELOPE(3.950,3.950,-71.983,-71.983) |
geographic |
Parus |
geographic_facet |
Parus |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_relation |
doi:10.1111/j.1600-048X.2011.05376.x issn: 0908-8857 Journal of Avian Biology 43: 102- 108 (2012) http://hdl.handle.net/10261/67446 |
op_rights |
open |
op_doi |
https://doi.org/10.1111/j.1600-048X.2011.05376.x |
container_title |
Journal of Avian Biology |
container_volume |
43 |
container_issue |
2 |
container_start_page |
102 |
op_container_end_page |
108 |
_version_ |
1790605247841828864 |