Resolving the native provenance of invasive fireweed (Senecio madagascariensis Poir.) in the Hawaiian Islands as inferred from phylogenetic analysis

Roux, Johannes J. Le; Wieczorek, Ania M.; Ramadan, Mohsen M.; Tran, Carol T.

doi:10.1111/j.1366-9516.2006.00271.x

Cited by 9 publications

(12 citation statements)

References 18 publications

(11 reference statements)

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“…Fireweed has variable growth habits and leaf shapes dependant on the type of soil and habitat, (Le Roux et al 2006). Genetic analyses of fireweed in Australia showed a close match with the S. madagascariensis complex from South Africa and a slight difference from S. madagascariensis from Madagascar (Scott et al 1998).…”

Section: Introductionmentioning

confidence: 95%

“…Genetic analyses of fireweed in Australia showed a close match with the S. madagascariensis complex from South Africa and a slight difference from S. madagascariensis from Madagascar (Scott et al 1998). Molecular analysis of Hawaiian fireweed populations showed that they also match populations from South Africa more closely than populations from Madagascar and Swaziland (Le Roux et al 2006). Hawaiian populations are thought to have arrived in carpet grass seed shipments from Australia (Motooka et al 2004).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Host range of Secusio extensa (Lepidoptera: Arctiidae), and potential for biological control of Senecio madagascariensis (Asteraceae)

Ramadan¹,

Murai²,

Johnson

2011

Journal of Applied Entomology

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Secusio extensa (Lepidoptera: Arctiidae) was evaluated as a potential biological control agent for Madagascar fireweed, Senecio madagascariensis (Asteraceae), which has invaded over 400 000 acres of rangeland in the Hawaiian Islands and is toxic to cattle and horses. The moth was introduced from southeastern Madagascar into containment facilities in Hawaii, and host specificity tests were conducted on 71 endemic and naturalized species (52 genera) in 12 tribes of Asteraceae and 17 species of non‐Asteraceae including six native shrubs and trees considered key components of Hawaiian ecosystems. No‐choice feeding tests indicated that plant species of the tribe Senecioneae were suitable hosts with first instars completing development to adult stage on S. madagascariensis (78.3%), Delairea odorata (66.1%), Senecio vulgaris (57.1%), Crassocephalum crepidioides (41.2%), and at significantly lower rates on Emilia fosbergii (1.8%) and Erechtites hieracifolia (1.3%). A low rate of complete larval development also was observed on sunflower, Helianthus annuus (11.6%), in the tribe Heliantheae. However, sunflower was rejected as a potential host in larval‐feeding and adult oviposition choice tests involving the primary host S. madagascariensis as control. Although larvae died as first instars on most test species, incomplete development and low levels of feeding were observed on nine species in the tribes Heliantheae, Cardueae and Lactuceae. Larvae did not feed on any non‐Asteraceae tested, including species with similar pyrrolizidene alkaloid chemistry, crops, and six ecologically prominent native species. Because all species of Senecioneae are non‐native and weedy in Hawaii, these results indicate that S. extensa is sufficiently host‐specific for introduction for biological control. High levels of feeding damage observed on potted plants indicate that S. extensa can severely impact the target fireweed as well as D. odorata, a noxious weed in native Hawaiian forests.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Host range of Secusio extensa (Lepidoptera: Arctiidae), and potential for biological control of Senecio madagascariensis (Asteraceae)

Ramadan¹,

Murai²,

Johnson

2011

Journal of Applied Entomology

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“…Studies that compare genetic structures of invasive populations and populations in the native range can help pinpoint the area of origin as well as elucidating patterns of colonisation and pathways of spread (Le Roux et al 2006). Do invaders come from areas with similar climatic characteristics?…”

Section: Introductionmentioning

confidence: 99%

Distinct invasion sources of common ragweed (Ambrosia artemisiifolia) in Eastern and Western Europe

et al. 2010

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The common ragweed (Ambrosia artemisiifolia L.; Asteraceae) is a North American native that is invading Eurasia. Besides its economic impact on crop yield, it presents a major health problem because of its highly allergenic pollen. The plant was imported inadvertently to Europe in the eighteenth century and has become invasive in several countries. By analyzing French and North American populations, it was previously shown that French populations were best described as a mixture of native sources and that range expansion in France probably involved sequential bottlenecks. Here, our aim was to determine whether Eastern European populations of A. artemisiifolia originated from the previously established French populations or from independent trans-Atlantic colonization events. We used nuclear microsatellite markers to elucidate the relationships among populations from Eastern and Western Europe in relation to populations from a broad survey across the native North American range. We found that A. artemisiifolia from Eastern Europe did not originate from the earlier established French populations but rather represents multiple independent introductions from other sources, or introductions from a not yet identified highly diverse native population. Eastern European populations show comparable amounts of genetic variability as do previously characterized French and North American populations, but analyses of population structure clearly distinguish the two European groups. This suggests separate introductions in Eastern and Western Europe as well as divergent sources for these two invasions, possibly as a result of distinct rules for trade and exchange for Eastern Europe during most of the twentieth century.

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“…The dominant invader was S. madagascariensis, which represented 14.7% 6 1.4% fractional cover across all plots in managed MSDF after ungulate exclusion (k ¼ 1.89 6 0.34 yr À1 , 95% CI ¼ 1.55-2.81 yr À1 , n ¼ 6). This species is native to southern Africa and Madagascar (Le Roux et al 2006). It is a prolific seed producer and capable of rapid population growth (Sindel and Michael 1988).…”

Section: Discussionmentioning

confidence: 99%

Remote analysis of biological invasion and the impact of enemy release

Kellner

Asner

Kinney

et al. 2011

Ecological Applications

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Escape from natural enemies is a widely held generalization for the success of exotic plants. We conducted a large-scale experiment in Hawaii (USA) to quantify impacts of ungulate removal on plant growth and performance, and to test whether elimination of an exotic generalist herbivore facilitated exotic success. Assessment of impacted and control sites before and after ungulate exclusion using airborne imaging spectroscopy and LiDAR, time series satellite observations, and ground-based field studies over nine years indicated that removal of generalist herbivores facilitated exotic success, but the abundance of native species was unchanged. Vegetation cover <1 m in height increased in ungulate-free areas from 48.7% +/- 1.5% to 74.3% +/- 1.8% over 8.4 years, corresponding to an annualized growth rate of lambda = 1.05 +/- 0.01 yr(-1) (median +/- SD). Most of the change was attributable to exotic plant species, which increased from 24.4% +/- 1.4% to 49.1% +/- 2.0%, (lambda = 1.08 +/- 0.01 yr(-1)). Native plants experienced no significant change in cover (23.0% +/- 1.3% to 24.2% +/- 1.8%, lambda = 1.01 +/- 0.01 yr(-1)). Time series of satellite phenology were indistinguishable between the treatment and a 3.0-km2 control site for four years prior to ungulate removal, but they diverged immediately following exclusion of ungulates. Comparison of monthly EVI means before and after ungulate exclusion and between the managed and control areas indicates that EVI strongly increased in the managed area after ungulate exclusion. Field studies and airborne analyses show that the dominant invader was Senecio madagascariensis, an invasive annual forb that increased from < 0.01% to 14.7% fractional cover in ungulate-free areas (lambda = 1.89 +/- 0.34 yr(-1)), but which was nearly absent from the control site. A combination of canopy LAI, water, and fractional cover were expressed in satellite EVI time series and indicate that the invaded region maintained greenness during drought conditions. These findings demonstrate that enemy release from generalist herbivores can facilitate exotic success and suggest a plausible mechanism by which invasion occurred. They also show how novel remote-sensing technology can be integrated with conservation and management to help address exotic plant invasions.

show abstract

Resolving the native provenance of invasive fireweed (Senecio madagascariensis Poir.) in the Hawaiian Islands as inferred from phylogenetic analysis

Cited by 9 publications

References 18 publications

Host range of Secusio extensa (Lepidoptera: Arctiidae), and potential for biological control of Senecio madagascariensis (Asteraceae)

Host range of Secusio extensa (Lepidoptera: Arctiidae), and potential for biological control of Senecio madagascariensis (Asteraceae)

Distinct invasion sources of common ragweed (Ambrosia artemisiifolia) in Eastern and Western Europe

Remote analysis of biological invasion and the impact of enemy release

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