reference : Extinction of an introduced warm-climate alien species, Xenopus laevis, by extreme weather events

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/reference/f487bf16-75c4-45b3-bd0a-fd9d03b94299
Bibliographic fields
reftype Journal Article
Abstract Invasive, non-native species represent a major threat to biodiversity worldwide. The African amphibian Xenopus laevis is widely regarded as an invasive species and a threat to local faunas. Populations originating at the Western Cape, South Africa, have been introduced on four continents, mostly in areas with a similar Mediterranean climate. Some introduced populations are also established in cooler environments where persistence for many decades suggests a capacity for long-term adaptation. In these cases, recent climate warming might enhance invasion ability, favouring range expansion, population growth and negative effects on native faunas. In the cool temperate UK, populations have been established for about 50 years in Wales and for an unknown period, probably >20 years, in England (Lincolnshire). Our field studies over 30 and 10 years, respectively, show that in favourable conditions there may be good recruitment, fast individual growth rates and large body size; maximum longevity exceeds 23 years. Nevertheless, areas of distribution remained limited, with numbers <500 in each population. In 2010, only a single individual was captured at each locality and further searching failed to record any others in repeated sampling up to 2014. We conclude that both populations are now extinct. The winters of 2009–2010 and 2010–2011 experienced extreme cold and drought (December 2010 was the coldest in 120 years and the third driest in 100 years). The extinction of X. laevis in these areas indicates that even relatively long-established alien species remain vulnerable to rare extreme weather conditions.
Author Tinsley, Richard C.; Stott, Lucy C.; Viney, Mark E.; Mable, Barbara K.; Tinsley, Matthew C.
DOI 10.1007/s10530-015-0944-x
Date November 01
ISSN 1573-1464
Issue 11
Journal Biological Invasions
Pages 3183-3195
Title Extinction of an introduced warm-climate alien species, Xenopus laevis, by extreme weather events
Type of Article journal article
Volume 17
Year 2015
Bibliographic identifiers
_record_number 23461
_uuid f487bf16-75c4-45b3-bd0a-fd9d03b94299