---
_id: '315'
abstract:
- lang: eng
text: 'More than 100 years after Grigg’s influential analysis of species’ borders,
the causes of limits to species’ ranges still represent a puzzle that has never
been understood with clarity. The topic has become especially important recently
as many scientists have become interested in the potential for species’ ranges
to shift in response to climate change—and yet nearly all of those studies fail
to recognise or incorporate evolutionary genetics in a way that relates to theoretical
developments. I show that range margins can be understood based on just two measurable
parameters: (i) the fitness cost of dispersal—a measure of environmental heterogeneity—and
(ii) the strength of genetic drift, which reduces genetic diversity. Together,
these two parameters define an ‘expansion threshold’: adaptation fails when genetic
drift reduces genetic diversity below that required for adaptation to a heterogeneous
environment. When the key parameters drop below this expansion threshold locally,
a sharp range margin forms. When they drop below this threshold throughout the
species’ range, adaptation collapses everywhere, resulting in either extinction
or formation of a fragmented metapopulation. Because the effects of dispersal
differ fundamentally with dimension, the second parameter—the strength of genetic
drift—is qualitatively different compared to a linear habitat. In two-dimensional
habitats, genetic drift becomes effectively independent of selection. It decreases
with ‘neighbourhood size’—the number of individuals accessible by dispersal within
one generation. Moreover, in contrast to earlier predictions, which neglected
evolution of genetic variance and/or stochasticity in two dimensions, dispersal
into small marginal populations aids adaptation. This is because the reduction
of both genetic and demographic stochasticity has a stronger effect than the cost
of dispersal through increased maladaptation. The expansion threshold thus provides
a novel, theoretically justified, and testable prediction for formation of the
range margin and collapse of the species’ range.'
article_number: e2005372
author:
- first_name: Jitka
full_name: Polechova, Jitka
id: 3BBFB084-F248-11E8-B48F-1D18A9856A87
last_name: Polechova
orcid: 0000-0003-0951-3112
citation:
ama: Polechova J. Is the sky the limit? On the expansion threshold of a species’
range. PLoS Biology. 2018;16(6). doi:10.1371/journal.pbio.2005372
apa: Polechova, J. (2018). Is the sky the limit? On the expansion threshold of a
species’ range. PLoS Biology. Public Library of Science. https://doi.org/10.1371/journal.pbio.2005372
chicago: Polechova, Jitka. “Is the Sky the Limit? On the Expansion Threshold of
a Species’ Range.” PLoS Biology. Public Library of Science, 2018. https://doi.org/10.1371/journal.pbio.2005372.
ieee: J. Polechova, “Is the sky the limit? On the expansion threshold of a species’
range,” PLoS Biology, vol. 16, no. 6. Public Library of Science, 2018.
ista: Polechova J. 2018. Is the sky the limit? On the expansion threshold of a species’
range. PLoS Biology. 16(6), e2005372.
mla: Polechova, Jitka. “Is the Sky the Limit? On the Expansion Threshold of a Species’
Range.” PLoS Biology, vol. 16, no. 6, e2005372, Public Library of Science,
2018, doi:10.1371/journal.pbio.2005372.
short: J. Polechova, PLoS Biology 16 (2018).
date_created: 2018-12-11T11:45:46Z
date_published: 2018-06-15T00:00:00Z
date_updated: 2023-02-23T14:10:16Z
day: '15'
ddc:
- '576'
department:
- _id: NiBa
doi: 10.1371/journal.pbio.2005372
file:
- access_level: open_access
checksum: 908c52751bba30c55ed36789e5e4c84d
content_type: application/pdf
creator: dernst
date_created: 2019-01-22T08:30:03Z
date_updated: 2020-07-14T12:46:01Z
file_id: '5870'
file_name: 2017_PLOS_Polechova.pdf
file_size: 6968201
relation: main_file
file_date_updated: 2020-07-14T12:46:01Z
has_accepted_license: '1'
intvolume: ' 16'
issue: '6'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
publication: PLoS Biology
publication_identifier:
issn:
- '15449173'
publication_status: published
publisher: Public Library of Science
publist_id: '7550'
quality_controlled: '1'
related_material:
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relation: research_data
status: public
scopus_import: 1
status: public
title: Is the sky the limit? On the expansion threshold of a species’ range
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 16
year: '2018'
...
---
_id: '708'
abstract:
- lang: eng
text: 'In the developing and adult brain, oligodendrocyte precursor cells (OPCs)
are influenced by neuronal activity: they are involved in synaptic signaling with
neurons, and their proliferation and differentiation into myelinating glia can
be altered by transient changes in neuronal firing. An important question that
has been unanswered is whether OPCs can discriminate different patterns of neuronal
activity and respond to them in a distinct way. Here, we demonstrate in brain
slices that the pattern of neuronal activity determines the functional changes
triggered at synapses between axons and OPCs. Furthermore, we show that stimulation
of the corpus callosum at different frequencies in vivo affects proliferation
and differentiation of OPCs in a dissimilar way. Our findings suggest that neurons
do not influence OPCs in “all-or-none” fashion but use their firing pattern to
tune the response and behavior of these nonneuronal cells.'
article_number: e2001993
author:
- first_name: Balint
full_name: Nagy, Balint
id: 30F830CE-02D1-11E9-9BAA-DAF4881429F2
last_name: Nagy
orcid: 0000-0002-4002-4686
- first_name: Anahit
full_name: Hovhannisyan, Anahit
last_name: Hovhannisyan
- first_name: Ruxandra
full_name: Barzan, Ruxandra
last_name: Barzan
- first_name: Ting
full_name: Chen, Ting
last_name: Chen
- first_name: Maria
full_name: Kukley, Maria
last_name: Kukley
citation:
ama: Nagy B, Hovhannisyan A, Barzan R, Chen T, Kukley M. Different patterns of neuronal
activity trigger distinct responses of oligodendrocyte precursor cells in the
corpus callosum. PLoS Biology. 2017;15(8). doi:10.1371/journal.pbio.2001993
apa: Nagy, B., Hovhannisyan, A., Barzan, R., Chen, T., & Kukley, M. (2017).
Different patterns of neuronal activity trigger distinct responses of oligodendrocyte
precursor cells in the corpus callosum. PLoS Biology. Public Library of
Science. https://doi.org/10.1371/journal.pbio.2001993
chicago: Nagy, Balint, Anahit Hovhannisyan, Ruxandra Barzan, Ting Chen, and Maria
Kukley. “Different Patterns of Neuronal Activity Trigger Distinct Responses of
Oligodendrocyte Precursor Cells in the Corpus Callosum.” PLoS Biology.
Public Library of Science, 2017. https://doi.org/10.1371/journal.pbio.2001993.
ieee: B. Nagy, A. Hovhannisyan, R. Barzan, T. Chen, and M. Kukley, “Different patterns
of neuronal activity trigger distinct responses of oligodendrocyte precursor cells
in the corpus callosum,” PLoS Biology, vol. 15, no. 8. Public Library of
Science, 2017.
ista: Nagy B, Hovhannisyan A, Barzan R, Chen T, Kukley M. 2017. Different patterns
of neuronal activity trigger distinct responses of oligodendrocyte precursor cells
in the corpus callosum. PLoS Biology. 15(8), e2001993.
mla: Nagy, Balint, et al. “Different Patterns of Neuronal Activity Trigger Distinct
Responses of Oligodendrocyte Precursor Cells in the Corpus Callosum.” PLoS
Biology, vol. 15, no. 8, e2001993, Public Library of Science, 2017, doi:10.1371/journal.pbio.2001993.
short: B. Nagy, A. Hovhannisyan, R. Barzan, T. Chen, M. Kukley, PLoS Biology 15
(2017).
date_created: 2018-12-11T11:48:03Z
date_published: 2017-08-22T00:00:00Z
date_updated: 2021-01-12T08:11:45Z
day: '22'
ddc:
- '576'
- '610'
department:
- _id: SaSi
doi: 10.1371/journal.pbio.2001993
file:
- access_level: open_access
checksum: 0c974f430682dc832ea7b27ab5a93124
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:15:35Z
date_updated: 2020-07-14T12:47:49Z
file_id: '5156'
file_name: IST-2017-889-v1+1_journal.pbio.2001993.pdf
file_size: 18155365
relation: main_file
file_date_updated: 2020-07-14T12:47:49Z
has_accepted_license: '1'
intvolume: ' 15'
issue: '8'
language:
- iso: eng
month: '08'
oa: 1
oa_version: Published Version
publication: PLoS Biology
publication_identifier:
issn:
- '15449173'
publication_status: published
publisher: Public Library of Science
publist_id: '6983'
pubrep_id: '889'
quality_controlled: '1'
scopus_import: 1
status: public
title: Different patterns of neuronal activity trigger distinct responses of oligodendrocyte
precursor cells in the corpus callosum
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 15
year: '2017'
...
---
_id: '951'
abstract:
- lang: eng
text: Dengue-suppressing Wolbachia strains are promising tools for arbovirus control,
particularly as they have the potential to self-spread following local introductions.
To test this, we followed the frequency of the transinfected Wolbachia strain
wMel through Ae. aegypti in Cairns, Australia, following releases at 3 nonisolated
locations within the city in early 2013. Spatial spread was analysed graphically
using interpolation and by fitting a statistical model describing the position
and width of the wave. For the larger 2 of the 3 releases (covering 0.97 km2 and
0.52 km2), we observed slow but steady spatial spread, at about 100–200 m per
year, roughly consistent with theoretical predictions. In contrast, the smallest
release (0.11 km2) produced erratic temporal and spatial dynamics, with little
evidence of spread after 2 years. This is consistent with the prediction concerning
fitness-decreasing Wolbachia transinfections that a minimum release area is needed
to achieve stable local establishment and spread in continuous habitats. Our graphical
and likelihood analyses produced broadly consistent estimates of wave speed and
wave width. Spread at all sites was spatially heterogeneous, suggesting that environmental
heterogeneity will affect large-scale Wolbachia transformations of urban mosquito
populations. The persistence and spread of Wolbachia in release areas meeting
minimum area requirements indicates the promise of successful large-scale population
transfo
article_number: e2001894
article_processing_charge: No
author:
- first_name: Tom
full_name: Schmidt, Tom
last_name: Schmidt
- first_name: Nicholas H
full_name: Barton, Nicholas H
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
- first_name: Gordana
full_name: Rasic, Gordana
last_name: Rasic
- first_name: Andrew
full_name: Turley, Andrew
last_name: Turley
- first_name: Brian
full_name: Montgomery, Brian
last_name: Montgomery
- first_name: Inaki
full_name: Iturbe Ormaetxe, Inaki
last_name: Iturbe Ormaetxe
- first_name: Peter
full_name: Cook, Peter
last_name: Cook
- first_name: Peter
full_name: Ryan, Peter
last_name: Ryan
- first_name: Scott
full_name: Ritchie, Scott
last_name: Ritchie
- first_name: Ary
full_name: Hoffmann, Ary
last_name: Hoffmann
- first_name: Scott
full_name: O’Neill, Scott
last_name: O’Neill
- first_name: Michael
full_name: Turelli, Michael
last_name: Turelli
citation:
ama: Schmidt T, Barton NH, Rasic G, et al. Local introduction and heterogeneous
spatial spread of dengue-suppressing Wolbachia through an urban population of
Aedes Aegypti. PLoS Biology. 2017;15(5). doi:10.1371/journal.pbio.2001894
apa: Schmidt, T., Barton, N. H., Rasic, G., Turley, A., Montgomery, B., Iturbe Ormaetxe,
I., … Turelli, M. (2017). Local introduction and heterogeneous spatial spread
of dengue-suppressing Wolbachia through an urban population of Aedes Aegypti.
PLoS Biology. Public Library of Science. https://doi.org/10.1371/journal.pbio.2001894
chicago: Schmidt, Tom, Nicholas H Barton, Gordana Rasic, Andrew Turley, Brian Montgomery,
Inaki Iturbe Ormaetxe, Peter Cook, et al. “Local Introduction and Heterogeneous
Spatial Spread of Dengue-Suppressing Wolbachia through an Urban Population of
Aedes Aegypti.” PLoS Biology. Public Library of Science, 2017. https://doi.org/10.1371/journal.pbio.2001894.
ieee: T. Schmidt et al., “Local introduction and heterogeneous spatial spread
of dengue-suppressing Wolbachia through an urban population of Aedes Aegypti,”
PLoS Biology, vol. 15, no. 5. Public Library of Science, 2017.
ista: Schmidt T, Barton NH, Rasic G, Turley A, Montgomery B, Iturbe Ormaetxe I,
Cook P, Ryan P, Ritchie S, Hoffmann A, O’Neill S, Turelli M. 2017. Local introduction
and heterogeneous spatial spread of dengue-suppressing Wolbachia through an urban
population of Aedes Aegypti. PLoS Biology. 15(5), e2001894.
mla: Schmidt, Tom, et al. “Local Introduction and Heterogeneous Spatial Spread of
Dengue-Suppressing Wolbachia through an Urban Population of Aedes Aegypti.” PLoS
Biology, vol. 15, no. 5, e2001894, Public Library of Science, 2017, doi:10.1371/journal.pbio.2001894.
short: T. Schmidt, N.H. Barton, G. Rasic, A. Turley, B. Montgomery, I. Iturbe Ormaetxe,
P. Cook, P. Ryan, S. Ritchie, A. Hoffmann, S. O’Neill, M. Turelli, PLoS Biology
15 (2017).
date_created: 2018-12-11T11:49:22Z
date_published: 2017-05-30T00:00:00Z
date_updated: 2023-09-22T10:02:52Z
day: '30'
ddc:
- '576'
department:
- _id: NiBa
doi: 10.1371/journal.pbio.2001894
external_id:
isi:
- '000402520000012'
file:
- access_level: open_access
checksum: 107d290bd1159ec77b734eb2824b01c8
content_type: application/pdf
creator: system
date_created: 2018-12-12T10:08:30Z
date_updated: 2020-07-14T12:48:16Z
file_id: '4691'
file_name: IST-2017-843-v1+1_journal.pbio.2001894.pdf
file_size: 5541206
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intvolume: ' 15'
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issue: '5'
language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
publication: PLoS Biology
publication_identifier:
issn:
- '15449173'
publication_status: published
publisher: Public Library of Science
publist_id: '6464'
pubrep_id: '843'
quality_controlled: '1'
related_material:
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- id: '9857'
relation: research_data
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scopus_import: '1'
status: public
title: Local introduction and heterogeneous spatial spread of dengue-suppressing Wolbachia
through an urban population of Aedes Aegypti
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1
volume: 15
year: '2017'
...