Evidence for a shift in life-history strategy during the secondary phase of a plant invasion

Moloney, Kirk A.; Knaus, Florian; Dietz, Hansjörg

doi:10.1007/s10530-008-9277-3

Cited by 18 publications

(13 citation statements)

References 23 publications

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“…The shifts in habitat preference or tolerance associated with invasions have been recognized in previous studies (e.g. Hejda et al, 2009;Moloney et al, 2009), and various explanations have been suggested (Molina-Montenegro et al, 2011). In some cases, rapid evolution in the invaded range may occur, leading to changes in habitat preference or tolerance (Reznick & Ghalambdor, 2001;Lee, 2002;Lambrinos, 2004;Lavergne et al, 2009;Novy et al, 2013).…”

Section: Discussionmentioning

confidence: 89%

Native‐range habitats of invasive plants: are they similar to invaded‐range habitats and do they differ according to the geographical direction of invasion?

Hejda

Chytrý

Pergl

et al. 2014

Diversity and Distributions

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Aim Habitat types are involved in shaping biological traits of their resident native species and thus they determine, to a large extent, in which habitats particular species will succeed if invading outside their native range. However, the correspondences between habitats that invasive aliens occupy in the native and invaded ranges are poorly known. We explore the relationships between (1) habitats of invasive species in their native and invaded ranges and (2) nativerange habitats and the direction of invasion (from/to Europe; from/to the Old World). Location Global.Methods Descriptions of native-and invaded-range habitats of 286 invasive species were extracted from the literature and transformed into 12 habitat types. The differences between native-range habitats according to the direction of invasion and between habitats occupied in the native and invaded ranges were tested by log-linear models and deletion tests.Results Most frequent invaders were species confined to forests (98 species), riparian habitats (80), grasslands (80) and man-made habitats (73) in their native ranges. Native-range habitats differed between species invading from and to Europe (110 and 41, respectively) as well as between species invading from and to the Old World (213 and 75, respectively). Grasslands were the most overrepresented native-range habitat for species invading from Europe compared to species invading Europe; wetlands were the most overrepresented native-range habitats for species invading the Old World compared to species invading from the Old World. Many species that originated from forests invade grasslands, and, conversely, many grassland species invade open forests.Main conclusions European grassland species are much more successful as world-wide invaders than grassland species from other continents invading Europe, and New World wetland species invading the Old World are more successful than wetland species invading from the Old World. Successful invaders are adapted to a broad spectrum of successional phases ranging from grasslands to forests. KeywordsBiological invasions, direction of invasion, habitat invasions, invaded-range habitats, native-range habitats, plant invasions, source-area approach.

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Section: Discussionmentioning

confidence: 89%

Native‐range habitats of invasive plants: are they similar to invaded‐range habitats and do they differ according to the geographical direction of invasion?

Hejda

Chytrý

Pergl

et al. 2014

Diversity and Distributions

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“…Chun et al 2009;Moloney et al 2009). Within each range, seeds were used from three geographically distant regions and within each region we used three populations (Table 1).…”

Section: Plant Materials and Experimental Crossesmentioning

confidence: 99%

Effects of admixture in native and invasive populations of Lythrum salicaria

et al. 2018

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Intraspecific hybridization between diverged populations can enhance fitness via various genetic mechanisms. The benefits of such admixture have been proposed to be particularly relevant in biological invasions, when invasive populations originating from different source populations are found sympatrically. However, it remains poorly understood if admixture is an important contributor to plant invasive success and how admixture effects compare between invasive and native ranges. Here, we used experimental crosses in Lythrum salicaria, a species with well-established history of multiple introductions to Eastern North America, to quantify and compare admixture effects in native European and invasive North American populations. We observed heterosis in between-population crosses both in native and invasive ranges. However, invasive-range heterosis was restricted to crosses between two different Eastern and Western invasion fronts, whereas heterosis was absent in geographically distant crosses within a single large invasion front. Our results suggest that multiple introductions have led to already-admixed invasion fronts, such that experimental crosses do not further increase performance, but that contact between different invasion fronts further enhances fitness after admixture. Thus, intra-continental movement of invasive plants in their introduced range has the potential to boost invasiveness even in well-established and successfully spreading invasive species.

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“…In this context, the increased leaf life span of A. negundo under more stressful conditions (Reich et al 1992;Westoby et al 2002) can be considered an adaptation typical of the For statistical details see Table 5 Mean values (±SD) refer to mean data by origin type (n = 5 populations) secondary phase of invasion, following the theory of Dietz and Edwards (2006). One of the few supports of this conceptual model until now was recently provided by Moloney et al (2009) in an observational approach. The authors studied life-history traits of purple loosestrife (Lythrum salicaria) along a water availability gradient both in the introduced and in the native range and found smaller growth habit of Lythrum salicaria combined with increased longevity in dry habitats compared to wet ones.…”

Section: Traits Of Primary and Secondary Invasionmentioning

confidence: 99%

Secondary invasion of Acer negundo: the role of phenotypic responses versus local adaptation

2010

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During plant species invasions, the role of adaptive processes is particularly of interest in later stages of range expansion when populations start invading habitats that initially have not been disposed to invasions. The dioecious tree Acer negundo, primarily invasive in Europe in wet habitats along riversides and in floodplains, has increased its abundance in dry habitats of industrial wasteland and ruderal sites during the last decades in Eastern Germany. We chose 21 invasive populations from wet and from dry habitats in the region of Halle, Saxony-Anhalt, Germany, to test whether Acer negundo exhibits a shift in life-history strategy during expansion into more stressful habitats. We analyzed variables of habitat quality (pH, soil moisture, exchangeable cations, total C and N content) and determined density, sex ratio and regeneration of the populations. In addition, we conducted germination experiments and greenhouse studies with seedlings in four different soil moisture environments. Local adaptation was studied in a reciprocal transplant experiment. We found habitat type differentiation with lower nutrient and water supply at the dry sites than at the moist sites and significant differences in the number of seedlings in the field. In accordance, seeds from moist habitats responded significantly faster to germination treatments. In the transplant experiment, leaf life span was significantly larger for populations originating from dry habitat types than from moist habitats. This observed shift in life history strategy during secondary invasion of A. negundo from traits of establishment and rapid growth towards traits connected with persistence might be counteracted by high gene flow among populations of the different habitat types. However, prolonged leaf life span at dry sites contributed remarkably to the invasion of less favourable habitats, and, thus, is a first indication of ongoing adaptation.

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Evidence for a shift in life-history strategy during the secondary phase of a plant invasion

Cited by 18 publications

References 23 publications

Native‐range habitats of invasive plants: are they similar to invaded‐range habitats and do they differ according to the geographical direction of invasion?

Native‐range habitats of invasive plants: are they similar to invaded‐range habitats and do they differ according to the geographical direction of invasion?

Effects of admixture in native and invasive populations of Lythrum salicaria

Secondary invasion of Acer negundo: the role of phenotypic responses versus local adaptation

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