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Controls on pathogen species richness in plants' introduced and native ranges: roles of residence time, range size and host traits.

ABSTRACT: Introduced species escape many pathogens and other enemies, raising three questions. How quickly do introduced hosts accumulate pathogen species? What factors control pathogen species richness? Are these factors the same in the hosts' native and introduced ranges? We analysed fungal and viral pathogen species richness on 124 plant species in both their native European range and introduced North American range. Hosts introduced 400 years ago supported six times more pathogens than those introduced 40 years ago. In hosts' native range, pathogen richness was greater on hosts occurring in more habitat types, with a history of agricultural use and adapted to greater resource supplies. In hosts' introduced range, pathogen richness was correlated with host geographic range size, agricultural use and time since introduction, but not any measured biological traits. Introduced species have accumulated pathogens at rates that are slow relative to most ecological processes, and contingent on geographic and historic circumstance.

SUBMITTER: Mitchell CE

PROVIDER: S-EPMC3003901 | biostudies-other | 2010 Dec

REPOSITORIES: biostudies-other

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Controls on pathogen species richness in plants' introduced and native ranges: roles of residence time, range size and host traits.

Mitchell Charles E CE Blumenthal Dana D Jarošík Vojtěch V Puckett Emily E EE Pyšek Petr P

Ecology letters 20101025 12

Introduced species escape many pathogens and other enemies, raising three questions. How quickly do introduced hosts accumulate pathogen species? What factors control pathogen species richness? Are these factors the same in the hosts' native and introduced ranges? We analysed fungal and viral pathogen species richness on 124 plant species in both their native European range and introduced North American range. Hosts introduced 400 years ago supported six times more pathogens than those introduce ...[more]

PMID: 20973907

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Project description:Abstract Introduced species, which establish in novel environments, provide an opportunity to explore trait evolution and how it may contribute to the distribution and spread of species. Here, we explore trait changes of the perennial herb Lupinus polyphyllus based on 11 native populations in the western USA and 17 introduced populations in Finland. More specifically, we investigated whether introduced populations outperformed native populations in traits measured in situ (seed mass) and under common garden conditions during their first year (plant size, flowering probability, and number of flowering shoots). We also explored whether climate of origin (temperature) influenced plant traits and quantified the degree to which trait variability was explained collectively by country and temperature as compared to other population?level differences. Three out of four plant traits differed between the native and introduced populations; only seed mass was similar between countries, with most of its variation attributed to other sources of intraspecific variation not accounted for by country and temperature. Under common garden conditions, plants originating from introduced populations were larger than those originating from native populations. However, plants from the introduced range flowered less frequently and had fewer flowering shoots than their native?range counterparts. Temperature of a population's origin influenced plant size in the common garden, with plant size increasing with increasing mean annual temperature in both native and introduced populations. Our results of the first year reveal genetic basis for phenotypic differences in some fitness?related traits between the native and introduced populations of L. polyphyllus. However, not all of these trait differences necessarily contribute to the invasion success of the species and thus may not be adaptive, which raises a question how persistent the trait differences observed in the first year are later in individuals’ life for perennial herbs. We explored trait changes in the perennial herb Lupinus polyphyllus based on 11 native populations in the western USA and 17 introduced populations in Finland. Our results of the first?year reveal genetic basis for phenotypic differences in some fitness?related traits between the native and introduced populations of L. polyphyllus, but also raise a question how persistent the trait differences observed in the first year are later in individuals’ life for perennial herbs.

Dataset Information

Controls on pathogen species richness in plants' introduced and native ranges: roles of residence time, range size and host traits.

Publications

Controls on pathogen species richness in plants' introduced and native ranges: roles of residence time, range size and host traits.

Similar Datasets

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