The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

 ISSN 0268-0130

2020 Impact Factor for the Herpetological Journal is 0.862


pdf 06. Effects of nutrient enrichment and changes in the background tadpole community on American bullfrog tadpoles

646 downloads

Open Access

pp. 173-178
Authors: Smith, Geoffrey R. & Burgett, Amber A.

Abstract: Given its large geographic range and its ability to use a variety of aquatic systems, the tadpoles of American bullfrogs (Lithobates catesbeianus) are likely exposed to a variety of background anuran communities and anthropogenic stressors. To examine how changes in the environmental context affect American bullfrogs, we manipulated the presence and overall density of American toad (Anaxyrus americanus) and Gray treefrog (Hyla versicolor) tadpoles to alter the biotic environment, and manipulated nutrients (nitrate and phosphate) to alter the abiotic environment, mimicking the effects of agricultural run-off. At low background tadpole densities, enrichment had a positive effect on American bullfrog tadpole mass when the background tadpole community consisted of Gray treefrog tadpoles only, but had a negative effect when the community contained American toad tadpoles (either alone or with Gray treefrogs). The situation was reversed at high background tadpole densities. Nutrient enrichment decreased survivorship in American bullfrog tadpoles. Our results suggest that the wide variety of environmental contexts in which American bullfrog tadpoles are found throughout their native and non-native ranges are likely to affect their success.

Keywords: NITRATE, HYLA VERSICOLOR, PHOSPHATE, ANAXYRUS AMERICANUS, LITHOBATES CATESBEIANUS

Download Access:

The latest 8 issues can be downloaded when logged in with a Herpetological Journal subscription membership.

Individual articles can be purchased for download.

Older issues and occasional Open Access articles are available for public download

Submissions:

For further information and submission guidelines please see our Journal Instructions to Authors

pdfBHS Ethics Policy

IMPORTANT NOTE - JUNE 2020

Please note that as from Volume 31 Number 1 (January 2021) on, the Herpetological Journal will be available as an online publication only - the last print edition will be Volume 30 Number 4.   

Aligning with this change, it is now no longer possible to purchase a subscription that includes a print copy of the HJ.  All members who have existing HJ print subscriptions that remain active as at end June 2020 will receive the full four 2020 print editions.  New subscribers or renewals after this time will only have option to subscribe to the online only subscription package.  Subscription pricing has been amended to reflect the content changes.