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Urban moth communities suggest that life in the city favours thermophilic multi-dimensional generalists

Franzén, Markus LU ; Betzholtz, Per Eric LU ; Pettersson, Lars B. LU and Forsman, Anders (2020) In Proceedings. Biological sciences 287(1928).
Abstract

Biodiversity is challenged worldwide by exploitation, global warming, changes in land use and increasing urbanization. It is hypothesized that communities in urban areas should consist primarily of generalist species with broad niches that are able to cope with novel, variable, fragmented, warmer and unpredictable environments shaped by human pressures. We surveyed moth communities in three cities in northern Europe and compared them with neighbouring moth assemblages constituting species pools of potential colonizers. We found that urban moth communities consisted of multi-dimensional generalist species that had larger distribution ranges, more variable colour patterns, longer reproductive seasons, broader diets, were more likely to... (More)

Biodiversity is challenged worldwide by exploitation, global warming, changes in land use and increasing urbanization. It is hypothesized that communities in urban areas should consist primarily of generalist species with broad niches that are able to cope with novel, variable, fragmented, warmer and unpredictable environments shaped by human pressures. We surveyed moth communities in three cities in northern Europe and compared them with neighbouring moth assemblages constituting species pools of potential colonizers. We found that urban moth communities consisted of multi-dimensional generalist species that had larger distribution ranges, more variable colour patterns, longer reproductive seasons, broader diets, were more likely to overwinter as an egg, more thermophilic, and occupied more habitat types compared with moth communities in surrounding areas. When body size was analysed separately, results indicated that city occupancy was associated with larger size, but this effect disappeared when body size was analysed together with the other traits. Our findings indicate that urbanization imposes a spatial filtering process in favour of thermophilic species characterized by high intraspecific diversity and multi-dimensional generalist lifestyles over specialized species with narrow niches.

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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
generalization, global change, moths, specialization, species traits, urbanization
in
Proceedings. Biological sciences
volume
287
issue
1928
article number
20193014
pages
10 pages
publisher
Royal Society
external identifiers
  • pmid:32517620
  • scopus:85086354083
ISSN
1471-2954
DOI
10.1098/rspb.2019.3014
language
English
LU publication?
yes
id
73e1714f-6870-4882-b17e-37fcfa2f3a9c
date added to LUP
2020-06-29 09:01:50
date last changed
2021-04-06 05:22:33
@article{73e1714f-6870-4882-b17e-37fcfa2f3a9c,
  abstract     = {<p>Biodiversity is challenged worldwide by exploitation, global warming, changes in land use and increasing urbanization. It is hypothesized that communities in urban areas should consist primarily of generalist species with broad niches that are able to cope with novel, variable, fragmented, warmer and unpredictable environments shaped by human pressures. We surveyed moth communities in three cities in northern Europe and compared them with neighbouring moth assemblages constituting species pools of potential colonizers. We found that urban moth communities consisted of multi-dimensional generalist species that had larger distribution ranges, more variable colour patterns, longer reproductive seasons, broader diets, were more likely to overwinter as an egg, more thermophilic, and occupied more habitat types compared with moth communities in surrounding areas. When body size was analysed separately, results indicated that city occupancy was associated with larger size, but this effect disappeared when body size was analysed together with the other traits. Our findings indicate that urbanization imposes a spatial filtering process in favour of thermophilic species characterized by high intraspecific diversity and multi-dimensional generalist lifestyles over specialized species with narrow niches.</p>},
  author       = {Franzén, Markus and Betzholtz, Per Eric and Pettersson, Lars B. and Forsman, Anders},
  issn         = {1471-2954},
  language     = {eng},
  month        = {06},
  number       = {1928},
  publisher    = {Royal Society},
  series       = {Proceedings. Biological sciences},
  title        = {Urban moth communities suggest that life in the city favours thermophilic multi-dimensional generalists},
  url          = {http://dx.doi.org/10.1098/rspb.2019.3014},
  doi          = {10.1098/rspb.2019.3014},
  volume       = {287},
  year         = {2020},
}