Condition-specific competition governs the geographic distribution and diversity of ectoparasites

Understanding how environmental parameters interact to govern species distributions is a shared goal of ecology and biogeography. Biotic and abiotic conditions can change distributions by affecting the nature of interspecific interactions. Although documented in free-living systems, this context dep...

Celý popis

Uloženo v:
Podrobná bibliografie
Vydáno v:The American naturalist Ročník 177; číslo 4; s. 522
Hlavní autoři: Malenke, J R, Newbold, N, Clayton, D H
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States 01.04.2011
Témata:
Animals
Arizona - epidemiology
Bird Diseases - epidemiology
Bird Diseases - parasitology
Columbidae
Demography
Ecosystem
Florida - epidemiology
Humidity
Lice Infestations - epidemiology
Lice Infestations - parasitology
Lice Infestations - veterinary
Phthiraptera - genetics
Phthiraptera - physiology
Species Specificity
Florida
Arizona
ISSN:1537-5323, 1537-5323
On-line přístup:Zjistit podrobnosti o přístupu
Tagy: Přidat tag
Žádné tagy, Buďte první, kdo vytvoří štítek k tomuto záznamu!
Popis
Shrnutí:Understanding how environmental parameters interact to govern species distributions is a shared goal of ecology and biogeography. Biotic and abiotic conditions can change distributions by affecting the nature of interspecific interactions. Although documented in free-living systems, this context dependency has been neglected in parasite interactions. We investigated the influence of condition-specific competition on the specificity of two species of feather lice (Phthiraptera: Ischnocera) that share a host, the mourning dove (Zenaida macroura). We show that relative humidity restricts the range of one species, Columbicola macrourae3 (i.e., the C. macrourae lineage found on mourning doves), to the more humid eastern United States. The second species, Columbicola baculoides, an arid-adapted species, is restricted to drier regions of the western United States by C. macrourae3, which outcompetes it in experiments. Thus, arid conditions in the West provide C. baculoides with a climatic refuge from the competitively superior C. macrourae3, effectively doubling parasite diversity on one host species. These results support the hypothesis that abiotic factors can determine species distributions on the stressful end of an environmental gradient while interspecific competition governs distributions at the benign end. The balance between these factors is subject to change as environmental conditions change, even if the host distribution remains unaffected.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1537-5323
1537-5323
DOI:10.1086/658176