Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder)
PREMISE OF THE STUDY: Dispersal of parasitic Cuscuta species (dodders) worldwide has been assumed to be largely anthropomorphic because their seeds do not match any previously known dispersal syndrome and no natural dispersal vectors have been reliably documented. However, the genus has a subcosmopo...
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Online Access: | http://dx.doi.org/10.3732/ajb.1500507 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.1500507 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.1500507/fullpdf |
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crwiley:10.3732/ajb.1500507 2024-09-15T17:39:18+00:00 Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) Costea, Mihai Stefanović, Saša García, Miguel A. De La Cruz, Susan Casazza, Michael L. Green, Andy J. Severo Ochoa Program for Centers of Excellence in R+D+I NSERC of Canada Discovery USGS Western Ecological Research Center Ecosystems Mission Area program 2016 http://dx.doi.org/10.3732/ajb.1500507 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.1500507 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.1500507/fullpdf en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 103, issue 5, page 957-962 ISSN 0002-9122 1537-2197 journal-article 2016 crwiley https://doi.org/10.3732/ajb.1500507 2024-08-09T04:25:01Z PREMISE OF THE STUDY: Dispersal of parasitic Cuscuta species (dodders) worldwide has been assumed to be largely anthropomorphic because their seeds do not match any previously known dispersal syndrome and no natural dispersal vectors have been reliably documented. However, the genus has a subcosmopolitan distribution and recent phylogeographic results have indicated that at least18 historical cases of long‐distance dispersal (LDD) have occurred during its evolution. The objective of this study is to report the first LDD biological vector for Cuscuta seeds. METHODS: Twelve northern pintails ( Anas acuta ) were collected from Suisun Marsh, California and the contents of their lowest part of the large intestine (rectum) were extracted and analyzed. Seed identification was done both morphologically and using a molecular approach. Extracted seeds were tested for germination and compared to seeds not subjected to gut passage to determine the extent of structural changes caused to the seed coat by passing through the digestive tract. KEY RESULTS: Four hundred and twenty dodder seeds were found in the rectum of four northern pintails. From these, 411 seeds were identified as Cuscuta campestris and nine as most likely C. pacifica . The germination rate of C. campestris seeds after gut passage was 55%. Structural changes caused by the gut passage in both species were similar to those caused by an acid scarification. CONCLUSIONS: Endozoochory by waterbirds may explain the historical LDD cases in the evolution of Cuscuta . This also suggests that current border quarantine measures may be insufficient to stopping spreading of dodder pests along migratory flyways. Article in Journal/Newspaper Anas acuta Wiley Online Library American Journal of Botany 103 5 957 962 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
PREMISE OF THE STUDY: Dispersal of parasitic Cuscuta species (dodders) worldwide has been assumed to be largely anthropomorphic because their seeds do not match any previously known dispersal syndrome and no natural dispersal vectors have been reliably documented. However, the genus has a subcosmopolitan distribution and recent phylogeographic results have indicated that at least18 historical cases of long‐distance dispersal (LDD) have occurred during its evolution. The objective of this study is to report the first LDD biological vector for Cuscuta seeds. METHODS: Twelve northern pintails ( Anas acuta ) were collected from Suisun Marsh, California and the contents of their lowest part of the large intestine (rectum) were extracted and analyzed. Seed identification was done both morphologically and using a molecular approach. Extracted seeds were tested for germination and compared to seeds not subjected to gut passage to determine the extent of structural changes caused to the seed coat by passing through the digestive tract. KEY RESULTS: Four hundred and twenty dodder seeds were found in the rectum of four northern pintails. From these, 411 seeds were identified as Cuscuta campestris and nine as most likely C. pacifica . The germination rate of C. campestris seeds after gut passage was 55%. Structural changes caused by the gut passage in both species were similar to those caused by an acid scarification. CONCLUSIONS: Endozoochory by waterbirds may explain the historical LDD cases in the evolution of Cuscuta . This also suggests that current border quarantine measures may be insufficient to stopping spreading of dodder pests along migratory flyways. |
author2 |
Severo Ochoa Program for Centers of Excellence in R+D+I NSERC of Canada Discovery USGS Western Ecological Research Center Ecosystems Mission Area program |
format |
Article in Journal/Newspaper |
author |
Costea, Mihai Stefanović, Saša García, Miguel A. De La Cruz, Susan Casazza, Michael L. Green, Andy J. |
spellingShingle |
Costea, Mihai Stefanović, Saša García, Miguel A. De La Cruz, Susan Casazza, Michael L. Green, Andy J. Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) |
author_facet |
Costea, Mihai Stefanović, Saša García, Miguel A. De La Cruz, Susan Casazza, Michael L. Green, Andy J. |
author_sort |
Costea, Mihai |
title |
Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) |
title_short |
Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) |
title_full |
Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) |
title_fullStr |
Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) |
title_full_unstemmed |
Waterfowl endozoochory: An overlooked long‐distance dispersal mode for Cuscuta (dodder) |
title_sort |
waterfowl endozoochory: an overlooked long‐distance dispersal mode for cuscuta (dodder) |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.3732/ajb.1500507 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.3732%2Fajb.1500507 http://onlinelibrary.wiley.com/wol1/doi/10.3732/ajb.1500507/fullpdf |
genre |
Anas acuta |
genre_facet |
Anas acuta |
op_source |
American Journal of Botany volume 103, issue 5, page 957-962 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.3732/ajb.1500507 |
container_title |
American Journal of Botany |
container_volume |
103 |
container_issue |
5 |
container_start_page |
957 |
op_container_end_page |
962 |
_version_ |
1810479084889702400 |