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Specialization of Mutualistic Interaction Networks Decreases toward Tropical Latitudes

Schleuning, Matthias (author)
Fruend, Jochen (author)
Klein, Alexandra-Maria (author)
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Abrahamczyk, Stefan (author)
Alarcon, Ruben (author)
Albrecht, Matthias (author)
Andersson, Georg (author)
Lund University,Lunds universitet,Biodiversitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Biodiversity,Department of Biology,Faculty of Science
Bazarian, Simone (author)
Boehning-Gaese, Katrin (author)
Bommarco, Riccardo (author)
Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology
Dalsgaard, Bo (author)
Dehling, D. Matthias (author)
Gotlieb, Ariella (author)
Hagen, Melanie (author)
Hickler, Thomas (author)
Holzschuh, Andrea (author)
Kaiser-Bunbury, Christopher N. (author)
Kreft, Holger (author)
Morris, Rebecca J. (author)
Sandel, Brody (author)
Sutherland, William J. (author)
Svenning, Jens-Christian (author)
Tscharntke, Teja (author)
Watts, Stella (author)
Weiner, Christiane N. (author)
Werner, Michael (author)
Williams, Neal M. (author)
Winqvist, Camilla (author)
Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för ekologi,Department of Ecology
Dormann, Carsten F. (author)
Bluethgen, Nico (author)
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 (creator_code:org_t)
 
Elsevier BV, 2012
2012
English.
In: Current Biology. - : Elsevier BV. - 1879-0445 .- 0960-9822. ; 22:20, s. 1925-1931
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Species-rich tropical communities are expected to be more specialized than their temperate counterparts [1-3]. Several studies have reported increasing biotic specialization toward the tropics [4-7], whereas others have not found latitudinal trends once accounting for sampling bias [8, 9] or differences in plant diversity [10, 11]. Thus, the direction of the latitudinal Specialization gradient remains contentious. With an unprecedented global data set, we investigated how biotic specialization between plants and animal pollinators or seed dispersers is associated with latitude, past and contemporary climate, and plant diversity. We show that in contrast to expectation, biotic specialization of mutualistic networks is significantly lower at tropical than at temperate latitudes. Specialization was more closely related to contemporary climate than to past climate stability, suggesting that current conditions have a stronger effect on biotic specialization than historical community stability. Biotic specialization decreased with increasing local and regional plant diversity. This suggests that high specialization of mutualistic interactions is a response of pollinators and seed dispersers to low plant diversity. This could explain why the latitudinal specialization gradient is reversed relative to the latitudinal diversity gradient. Low mutualistic network specialization in the tropics suggests higher tolerance against extinctions in tropical than in temperate communities.

Subject headings

NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

Publication and Content Type

art (subject category)
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