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Metapopulation dynamics over 25 years of a beetle, Osmoderma eremita, inhabiting hollow oaks

Lindman, Ly ; Larsson, Mattias C. LU ; Mellbrand, Kajsa LU ; Svensson, Glenn P. LU ; Hedin, Jonas LU ; Tranberg, Olov and Ranius, Thomas LU (2020) In Oecologia 194(4). p.771-780
Abstract

Osmoderma eremita is a species of beetle that inhabits hollows in ancient trees, which is a habitat that has decreased significantly during the last century. In southeastern Sweden, we studied the metapopulation dynamics of this beetle over a 25 year period, using capture-mark-recapture. The metapopulation size had been rather stable over time, but in most of the individual trees there had been a positive or negative trend in population development. The probability of colonisation was higher in well-connected trees with characteristics reflecting earlier successional stages, and the probability of extinction higher in trees with larger diameter (i.e. in later successional stages), which is expected from a habitat-tracking... (More)

Osmoderma eremita is a species of beetle that inhabits hollows in ancient trees, which is a habitat that has decreased significantly during the last century. In southeastern Sweden, we studied the metapopulation dynamics of this beetle over a 25 year period, using capture-mark-recapture. The metapopulation size had been rather stable over time, but in most of the individual trees there had been a positive or negative trend in population development. The probability of colonisation was higher in well-connected trees with characteristics reflecting earlier successional stages, and the probability of extinction higher in trees with larger diameter (i.e. in later successional stages), which is expected from a habitat-tracking metapopulation. The annual tree mortality and fall rates (1.1% and 0.4%, respectively) are lower than the colonisation and extinction rates (5–7%), indicating that some of the metapopulation dynamics are due to the habitat dynamics, but many colonisations and extinctions take place for other reasons, such as stochastic events in small populations. The studied metapopulation occurs in an area with a high density of hollow oaks and where the oak pastures are still managed by grazing. In stands with fewer than ten suitable trees, the long-term extinction risk may be considerable, since only a small proportion of all hollow trees harbours large populations, and the population size in trees may change considerably during a decade.

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author
; ; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Capture-mark-recapture, Colonisation, Extinction, Long-term data, Population size
in
Oecologia
volume
194
issue
4
pages
10 pages
publisher
Springer
external identifiers
  • pmid:33159540
  • scopus:85095437691
ISSN
0029-8549
DOI
10.1007/s00442-020-04794-7
language
English
LU publication?
yes
id
09ad59d5-f6bc-4e76-bf24-8978457aa1d1
date added to LUP
2020-11-23 11:36:17
date last changed
2021-04-13 01:44:55
@article{09ad59d5-f6bc-4e76-bf24-8978457aa1d1,
  abstract     = {<p>Osmoderma eremita is a species of beetle that inhabits hollows in ancient trees, which is a habitat that has decreased significantly during the last century. In southeastern Sweden, we studied the metapopulation dynamics of this beetle over a 25 year period, using capture-mark-recapture. The metapopulation size had been rather stable over time, but in most of the individual trees there had been a positive or negative trend in population development. The probability of colonisation was higher in well-connected trees with characteristics reflecting earlier successional stages, and the probability of extinction higher in trees with larger diameter (i.e. in later successional stages), which is expected from a habitat-tracking metapopulation. The annual tree mortality and fall rates (1.1% and 0.4%, respectively) are lower than the colonisation and extinction rates (5–7%), indicating that some of the metapopulation dynamics are due to the habitat dynamics, but many colonisations and extinctions take place for other reasons, such as stochastic events in small populations. The studied metapopulation occurs in an area with a high density of hollow oaks and where the oak pastures are still managed by grazing. In stands with fewer than ten suitable trees, the long-term extinction risk may be considerable, since only a small proportion of all hollow trees harbours large populations, and the population size in trees may change considerably during a decade.</p>},
  author       = {Lindman, Ly and Larsson, Mattias C. and Mellbrand, Kajsa and Svensson, Glenn P. and Hedin, Jonas and Tranberg, Olov and Ranius, Thomas},
  issn         = {0029-8549},
  language     = {eng},
  number       = {4},
  pages        = {771--780},
  publisher    = {Springer},
  series       = {Oecologia},
  title        = {Metapopulation dynamics over 25 years of a beetle, Osmoderma eremita, inhabiting hollow oaks},
  url          = {http://dx.doi.org/10.1007/s00442-020-04794-7},
  doi          = {10.1007/s00442-020-04794-7},
  volume       = {194},
  year         = {2020},
}