Food- and density-dependent dispersal : Evidence from a soil collembolan
Bengtsson, G. LU ; Hedlund, K. LU
and Rundgren, S.
LU
(1994)
In Journal of Animal Ecology
63(3).
p.513-520
- Abstract
- 1. Dispersal in a fungivore species of Collembola, Onychiurus armatus, in a homo- geneous soil was theoretically approached as a deterministic compartmental process, in which the movement of animals between discrete patches could be described by a series of differential equations or by the discrete geometric probability distribution, assuming a constant probability to move from one patch to the next.
2. Experiments were designed for a release of collembolans in two types of soil in a physical arrangement of distinct patches represented by vials connected by tubings to cover a distance of 40 cm. Dispersal distances of individuals were determined, and theoretical and observed distributions compared.
3. Dispersal rates, estimated... (More) - 1. Dispersal in a fungivore species of Collembola, Onychiurus armatus, in a homo- geneous soil was theoretically approached as a deterministic compartmental process, in which the movement of animals between discrete patches could be described by a series of differential equations or by the discrete geometric probability distribution, assuming a constant probability to move from one patch to the next.
2. Experiments were designed for a release of collembolans in two types of soil in a physical arrangement of distinct patches represented by vials connected by tubings to cover a distance of 40 cm. Dispersal distances of individuals were determined, and theoretical and observed distributions compared.
3. Dispersal rates, estimated from transfer rate constants, ranged from 0 020 to 1 42 day-1, suggesting that an average 0. armatus moved less than 10 cm day -1. The probability to leave a patch varied between 0 10 and 0 50.
4. Dispersal was dependent on population density, soil type and length of fungal mycelium; it was almost twice as high at a high than at a low density (90 000 and 30000 individuals m-2) in a mor soil and four times as high in a sandy compared with a mor soil. Dispersal rate decreased as the mycelial length increased, especially in a sandy soil.
5. Collembolans in a feeding phase had a higher tendency to disperse than those that were moulting.
6. Enriching the soil patch at 40 cm distance from the release point with a favoured food item, the fungal species Mortierella isabellina, increased dispersal rate by more than four times in a mor soil, suggesting that fungal odour can attract collembolans from a large distance and enhance their rate of movement more than a three-fold increase of their population density does. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/536d9134-37e7-4dd3-9876-049080a1fb08
- author
- Bengtsson, G.
LU
; Hedlund, K.
LU
and Rundgren, S.
LU
- organization
- publishing date
- 1994-01-01
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Animal Ecology
- volume
- 63
- issue
- 3
- pages
- 513 - 520
- publisher
- Wiley-Blackwell
- external identifiers
-
- scopus:0028180901
- ISSN
- 0021-8790
- DOI
- 10.2307/5218
- language
- English
- LU publication?
- yes
- id
- 536d9134-37e7-4dd3-9876-049080a1fb08
- date added to LUP
- 2019-01-02 12:34:15
- date last changed
- 2024-04-15 21:16:31
@article{536d9134-37e7-4dd3-9876-049080a1fb08,
abstract = {{1. Dispersal in a fungivore species of Collembola, Onychiurus armatus, in a homo- geneous soil was theoretically approached as a deterministic compartmental process, in which the movement of animals between discrete patches could be described by a series of differential equations or by the discrete geometric probability distribution, assuming a constant probability to move from one patch to the next. <br/>2. Experiments were designed for a release of collembolans in two types of soil in a physical arrangement of distinct patches represented by vials connected by tubings to cover a distance of 40 cm. Dispersal distances of individuals were determined, and theoretical and observed distributions compared. <br/>3. Dispersal rates, estimated from transfer rate constants, ranged from 0 020 to 1 42 day-1, suggesting that an average 0. armatus moved less than 10 cm day -1. The probability to leave a patch varied between 0 10 and 0 50. <br/>4. Dispersal was dependent on population density, soil type and length of fungal mycelium; it was almost twice as high at a high than at a low density (90 000 and 30000 individuals m-2) in a mor soil and four times as high in a sandy compared with a mor soil. Dispersal rate decreased as the mycelial length increased, especially in a sandy soil. <br/>5. Collembolans in a feeding phase had a higher tendency to disperse than those that were moulting. <br/>6. Enriching the soil patch at 40 cm distance from the release point with a favoured food item, the fungal species Mortierella isabellina, increased dispersal rate by more than four times in a mor soil, suggesting that fungal odour can attract collembolans from a large distance and enhance their rate of movement more than a three-fold increase of their population density does.}},
author = {{Bengtsson, G. and Hedlund, K. and Rundgren, S.}},
issn = {{0021-8790}},
language = {{eng}},
month = {{01}},
number = {{3}},
pages = {{513--520}},
publisher = {{Wiley-Blackwell}},
series = {{Journal of Animal Ecology}},
title = {{Food- and density-dependent dispersal : Evidence from a soil collembolan}},
url = {{http://dx.doi.org/10.2307/5218}},
doi = {{10.2307/5218}},
volume = {{63}},
year = {{1994}},
}