NDLI: Rapid response to abiotic and biotic factors controls population growth of two invasive drosophilids (Diptera) in the Brazilian Savanna

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Rapid response to abiotic and biotic factors controls population growth of two invasive drosophilids (Diptera) in the Brazilian Savanna

Content Provider	Springer Nature Link
Author	Döge, Jonas da Silva Oliveira, Henrique Valadão Tidon, Rosana
Copyright Year	2015
Abstract	An intrinsic property of invaders that determines many of the effects they produce in the areas they colonize is their great abundance. However, a lack of data generally hampers the exploration of the complex interactions of factors that regulate the abundance of most invasive populations. This lack of data generally hinders the understanding of the invasion process and, more specifically, interferes with the management of these populations. This paper uses hierarchical complex models to investigate how temperature, humidity, competitive interactions and resource availability affect the growth rates of naturalized populations of two invaders in the Brazilian Savanna: the African Drosophila simulans and Zaprionus indianus. We also assess how morphological (life-history) and demographic traits mediate these effects. Our results suggest that the population growth rates of both species depend on complex interactions between several of the studied variables but are regulated primarily by rapid and direct responses to resource availability. We found evidence that resources determine immediate oviposition rates, inducing a very rapid regulation of population sizes (in one generation, i.e., approximately 1 month). Our study also demonstrates a lower predictability for Z. indianus and we suggest that this finding is a result of the shorter evolutionary history of Z. indianus in the Brazilian Savanna. These results, valid for the system we have investigated, if validated by other studies, will help to increase the mechanistic understanding of invasions and may contribute to the development of effective management strategies to mitigate their effects on natural and agro-ecosystems.
Starting Page	2461
Ending Page	2474
Page Count	14
File Format	PDF
ISSN	13873547
Journal	Biological Invasions
Volume Number	17
Issue Number	8
e-ISSN	15731464
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-04-08
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Drosophila simulans Evolutionary tuning Population growth predictability Population hierarchical modeling Life-history Zaprionus indianus Ecology Freshwater & Marine Ecology Plant Sciences Developmental Biology
Content Type	Text
Resource Type	Article
Subject	Ecology Ecology, Evolution, Behavior and Systematics

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