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[aroid-l] [Pollinator] Fwd: "Heat reward for insect pollinators"

  • Subject: [aroid-l] [Pollinator] Fwd: "Heat reward for insect pollinators"
  • From: Wayne Owen wowen@fs.fed.us
  • Date: Fri, 21 Nov 2003 14:05:49 -0500





----- Forwarded by Wayne Owen/WO/USDAFS on 11/21/2003 02:04 PM -----
                                                                                                                              
                      RESEARCH Hilton Pond                                                                                    
                      Center                        To:      pollinator@coevolution.org                                       
                      <research@hiltonpond.         cc:                                                                       
                      org>                          Subject: [Pollinator] Fwd: "Heat reward for insect pollinators"           
                      Sent by:                                                                                                
                      pollinator-admin@coev                                                                                   
                      olution.org                                                                                             
                                                                                                                              
                                                                                                                              
                      11/20/2003 10:38 AM                                                                                     
                                                                                                                              
                                                                                                                              





Some of you may be interested in this paper in Nature.
Cheers,
BILL

>Brief Communications
>Nature 426, 243 - 244 (20 November 2003)
>Environmental biology: Heat reward for insect pollinators

>ROGER S. SEYMOUR*, CRAIG R. WHITE* & MARC GIBERNAUÝ

>* Environmental Biology, University of Adelaide, Adelaide 5005, Australia
>Ý Laboratoire d'Évolution et Diversité Biologique, Université Paul
Sabatier,
>31062 Toulouse, France
>
>In neotropical forests, adults of many large scarab beetle species spend
>most of their time inside the floral chambers of heat-producing flowers,
>where they feed and mate throughout the night and rest during the
following
>day, before briefly flying to another flower. Here we measure floral
>temperatures in Philodendron solimoesense (Araceae) in French Guiana and
the
>respiration rates of Cyclocephala colasi beetles at floral and ambient
>temperatures, and show that the beetles' extra energy requirements for
>activity are 2.0-4.8 times greater outside the flower than inside it. This
>finding indicates that heat produced by the flower constitutes an
important
>energy reward to pollinators, allowing them to feed and mate at a fraction
>of the energy cost that would be required outside the flower.
>
>http://www.nature.com/nature/





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