Aerial seed bank and dispersal traits in Anthemis chrysantha (Asteraceae), a critically endangered species

Aguado, M.T.; Vicente, María José; Miralles, J.; Franco, J.A.; Martínez-Sánchez, J.J.

doi:10.1016/j.flora.2012.02.002

Cited by 15 publications

(6 citation statements)

References 27 publications

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“…Our results proved that successional changes have re-sulted in significant differences in the composition of the soil seed bank and aboveground vegetation, with the seed bank and vegetation consisting of similar species in the saline-alkaline grassland. In arid and semi-arid ecosystems, the high spatial and temporal variability of the soil seed bank is a consequence of numerous ecological factors, including the phenology of flowering, seed set, and seed maturation (Busso and Bonvissuto, 2009), seed production (Bonvissuto and Busso, 2007;Jacquemyn et al, 2011), rate of seed predation (DeFalco et al, 2009;Hanin et al, 2013), season (Miao and Zou, 2009;Ge et al, 2013), and environmental factors, such as soil properties (Ge et al, 2013) and precipitation (Aguado et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Seed dispersal links the end of the reproductive cycle of adult plants with the establishment of their offspring, and has profound effects on vegetation structure (Du et al, 2007). Only a few studies have analyzed the relationship between the seed bank and the seed rain in the formation of plant communities (Kalamees and Zobel, 2002;Luzuriaga et al, 2005;Aguado et al, 2012). Confirming and quantifying such effects, however, has proven to be a challenge.…”

Section: Introductionmentioning

confidence: 99%

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Regenerative Role of Soil Seed Banks of Different Successional Stages in A Saline-alkaline Grassland in Northeast China

Yang

et al. 2018

Chin. Geogr. Sci.

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Soil seed banks can act as a potential seed source for natural revegetation and restoration. However, in a saline-alkaline grassland, it remains unclear how the stages of vegetation succession affect the characteristics of soil seed banks and the potential of soil seed banks of different successional stages for vegetation restoration. In this study, seasonal changes of the soil seed bank, and seed production and dispersal dynamics along degradation successional gradients were investigated in a saline-alkaline grassland in Northeast China, where the dominant grass during the 1960s, Leymus chinensis was replaced with the secondary successional order of Puccinellia chinampoensis, Chloris virgata, and Suaeda salsa, together with bare patches. It was found that the soil seed bank composition varied according to the changing vegetation and had the highest species richness (7-16) in the climax successional stage, but had a low Sørensen similarity (0.22-0.37) with the aboveground vegetation. There was a high seed density of the soil seed bank (21 062-62 166/m 2 in August and December) and also high Sørensen similarity index values (0.47-0.60) in the secondary successional stages of P. chinampoensis, C. virgata, and S. salsa. In bare patches, there were many seeds in the soil seed bank and some seedlings also appeared in the aboveground vegetation, indicating the existence of a persistent soil seed bank. Seed density and species richness differed substantially among the different successional stages, which was related to the reproductive characteristics of the standing plants in vegetation communities. Due to the lack of propagules of perennial species, especially the climax species of L. chinensis, in the soil, the successful restoration of the degraded saline-alkaline grassland was not possible. The study proved that in a degraded saline-alkaline grassland dominated by biennial or annual species, the soil seed bank was important for the revegetation of the current dominant plants, but not for the restoration of the original target species. Therefore, it is necessary to induce seeds or other propagules of the target perennial species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Regenerative Role of Soil Seed Banks of Different Successional Stages in A Saline-alkaline Grassland in Northeast China

Yang

et al. 2018

Chin. Geogr. Sci.

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“…Anthemis cotula seeds are small (length ≤ 2 mm and weight ≤ 0.5 mg), and their dispersal is presumably by wind, flowing water and human agency (Kay, 1971a). Short range seed dispersal could include transport via rain splash, as it does for other Anthemis species (e.g., A. chrysantha , A. pseudocotula ; Aguado et al , 2012). Local and regional dispersal can occur on farm machinery.…”

Section: Biologymentioning

confidence: 99%

Mayweed chamomile (Anthemis cotula L.) biology and management—A review of an emerging global invader

2020

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The globally invasive weed, mayweed chamomile (Anthemis cotula L.) is an annual, bushy, ill‐scented herb, originating in Eurasia. It is aggressively weedy in croplands, field‐side ditches, wet areas and along roadsides, especially in slightly acidic, nitrogen‐rich, clay‐loam soils. In addition to interfering with crop growth, the weed causes dermatitis and eye irritation in humans, skin rashes and sour mouth in domesticated mammals, and off‐flavours in cow's milk through forage contamination. Although A. cotula may be managed effectively with some broadleaf herbicides in cereal crops, it is much more difficult to manage in broadleaved crops and cover crops. In some regions, aggressive use of relatively few herbicides has selected for acetolactate synthase herbicide resistance in A. cotula. Therefore, A. cotula poses serious ecological and economic challenges in many regions. Despite this threat, the details of A. cotula biology and ecology in the context of environmental change remain relatively unknown. For example, the reason for the invasiveness of A. cotula remains uncertain, but is presumed to be due to abundant seed production, allelochemicals, mycorrhizal associations, minimal herbivory in invaded ranges, ability to attract generalist pollinators through an extended flowering period and adaptive capacity in a wide range of soil types and conditions. In this paper, we comprehensively review the literature and ongoing work on A. cotula and provide a research agenda to improve understanding and management of this species.

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“…For example, seed shape can influence burial depth (Weiher et al 1999) and lodgment in microsites where seedlings are able to establish (Harper et al 1970). It is also possible that different seed morphs are released at different times from the parent plant, as in Anthemis chrysantha (Asteraceae), where white non-dormant seeds are released first, and the dark dormant seeds remain on plants until dispersed by rainfall (usually in autumn; Aguado et al 2012).…”

Section: Seed Dimorphism and Provenance Of Brachyscome Ciliaris Austrmentioning

confidence: 99%

Influence of seed dimorphism and provenance on seed morphology, dispersal, germination and seedling growth of Brachyscome ciliaris (Asteraceae)

et al. 2015

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Abstract. Brachyscome ciliaris is a floriferous Australian native daisy, with potential for use as a horticultural species. The species is hardy and seeds are relatively easy to germinate, but it is unique within the Brachyscome genus in that seeds are distinctly dimorphic. Within a fruiting capitulum, ray seeds are smooth and narrow with a minute pappus, whereas disc seeds have broad flat wings with curled hairs and a longer pappus than that of ray seeds. Both seed morphs, collected from five populations of the species, were tested to determine differences in their morphology, germination speed and percentage, seedling growth and wind-dispersal characteristics. Ray seeds were generally lighter and smaller than disc seeds and their length varied significantly with provenance. Dormancy levels of the two seed morphs and growth of rayand disc-derived seedlings did not differ significantly, but differences were significant among the five populations tested. Seeds germinated readily, and germination was optimal under winter or summer conditions and lower in spring or autumn. Seed production by plants raised from ray or disc seeds was identical, but Noora-sourced plants yielded more seed than did plants sourced from the other provenances tested. Seed size, germination and plant growth of B. ciliaris varied significantly among populations. Winged disc seeds were dispersed slightly further by wind than were wingless ray seeds. We concluded that dormancy, germination and seed-yield characteristics of B. ciliaris were all influenced more by seed provenance than by seed morph (ray or disc).

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Aerial seed bank and dispersal traits in Anthemis chrysantha (Asteraceae), a critically endangered species

Cited by 15 publications

References 27 publications

Regenerative Role of Soil Seed Banks of Different Successional Stages in A Saline-alkaline Grassland in Northeast China

Regenerative Role of Soil Seed Banks of Different Successional Stages in A Saline-alkaline Grassland in Northeast China

Mayweed chamomile (Anthemis cotula L.) biology and management—A review of an emerging global invader

Influence of seed dimorphism and provenance on seed morphology, dispersal, germination and seedling growth of Brachyscome ciliaris (Asteraceae)

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