author = "Alonso, Conchita"

Encontrado 76 documentos, página mostrada 4 de 8

A high concentration of glucogallin, the common precursor of hydrolyzable tannins, does not deter herbivores

Description: The diversity of structures of plant phenolic compounds suggests that their interactions with insect herbivores may be compound specific. In this study, we modified the natural covariances observed in mature leaves of mountain birch, Betula pubescens ssp. czerepanovii (Orlova) Hämet-Ahti, by supplyi...
Language(s): Inglés

Disturbance-dependent spatial distribution of sexes in a gynodioecious understory shrub

Description: Several ecological conditions and processes occurring naturally in plant populations may lead to spatial aggregation of sexes within populations of sexually polymorphic species. In addition, ecological disturbances such as forest management or fire could also affect the spatial distribution of sexes...
Language(s): Inglés

Yponomeuta evonymellus outbreaks in southern Finland: Spatial synchrony but different local magnitudes

Description: Defoliations of Prunus padus by Yponomeuta evonymellus were monitored in two areas in southern Finland. During a long-term study (1980-1995) in the area with high peak defoliations, P. padus trees recorded two defoliation peaks, leading to complete defoliation of many trees. The negative relationshi...
Language(s): Inglés

Extreme intraplant variation in nectar sugar composition in an insect-pollinated perennial herb

Description: 7 páginas, 2 figuras, 2 tablas. , Variation in nectar chemistry among plants, flowers, or individual nectaries of a given species has been only rarely explored, yet it is an essential aspect to our understanding of how pollinator-mediated selection might act on nectar traits. This paper describes varia...
Language(s): Inglés

Exploring local borders of distribution in the shrub Daphne laureola: Individual and populations traits

Description: Biogeographic models predict that marginal populations should be more geographically isolated and smaller than central populations, linked to more stressful conditions and likely also to a reduction in density of individuals, individual growth, survival and reproductive output. This variation in...
Language(s): Inglés

Variability in the behavioural responses of three generalist herbivores to the most abundant coumarin in Daphne laureola leaves

Description: 8 páginas, 3 figuras, 1 tabla. , We evaluated the responses of three generalist herbivores (Lepidoptera: Noctuidae) to the most abundant coumarin in young leaves of spurge-laurel, Daphne laureola L. (Thymelaeaceae), a perennial shrub consistently fed upon by several noctuid species. Pseudenargia ulicis...
Language(s): Inglés

Ecological Context of Breeding System Variation: Sex, Size and Pollination in a (Predominantly) Gynodioecious Shrub

Description: † Background and Aims Species that exhibit among-population variation in breeding system are particularly suitable to study the importance of the ecological context for the stability and evolution of gender polymorphism. Geographical variation in breeding system and sex ratio of Daphne laureola (Th...
Language(s): Inglés

Mating system, sex ratio, and persistence of females in the gynodioecious shrub Daphne laureola L. (Thymelaeaceae)

Description: Although in gynodioecious populations male steriles require a fecundity advantage to compensate for their gametic disadvantage, southern Spanish populations of the long-lived shrub Daphne laureola do not show any fecundity advantage over hermaphrodites in terms of seed production and early seedling ...
Language(s): Inglés

Encontrado 76 documentos, página mostrada 4 de 8

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