author = "Rey, Pedro J."

Encontrado 22 documentos, página mostrada 1 de 3

Fuentes de variación en el tamaño de la semilla de la herbácea perenne Helleborus foetidus L. (Ranunculaceae)

Description: Seed size is one of the plant traits more thoroughly studied in plant sciences due to its pivoting ecological position between dispersal processes and emergence, survival and establishment of plant species. Frequently, most seed size variation is located within plant, exceeding variation between pla...
Language(s): Inglés

Geographic and temporal variation in the ant-seed dispersal assemblage of the perennial herb Helleborus foetidus L. (Ranunculaceae)

Description: Spatio-temporal variations in the composition of the animal interactive assemblages may result in variations in selective pressures on the plants. In ant-seed dispersal mutualisms, the study of the magnitude of spatial and temporal variation of ant assemblages is rarely studied, limiting inferences ...
Language(s): Inglés

Adaptive advantages of myrmecochory: The predator-avoidance hypothesis tested over a wide geographic range

Description: The predator-avoidance hypothesis states that once released from the parent plant, myrmecochorous seeds are rapidly taken by ants to their nests, where they are protected from predators. Previous studies conducted to test this hypothesis have frequently neglected two major aspects necessary for its ...
Language(s): Inglés

Influence of elaiosome on postdispersal dynamics of an ant-dispersed plant

Description: Specialized myrmecochorous plants bear an elaiosome attached to the seed. Ants benefit from food provided by this appendage and plants get their seeds eventually dispersed. Aside from the benefits conferred by seed dispersal, we hypothesize that the influence of the elaiosome might extend to late...
Language(s): Inglés

Regional and local variation in seedling emergence, mortality and recruitment of a perennial herb in Mediterranean mountain habitats

Description: Spatial patterns of seedling regener- ation of woody Mediterranean plants are widely documented, with seedlings and juve- niles growing almost exclusively under shrub and tree canopy. Neighbourhood habitat ame- lioration and consequent facilitative effects on r...
Language(s): Inglés

Pre- and post-germination determinants of spatial variation in recruitment in the perennial herb Helleborus foetidus L. (Ranunculaceae)

Description: 1 Recruitment in plant populations is a multiphase sequential process. An integrated view of the relationships between the stages and processes involved is therefore needed, but few studies have analysed the direct and indirect effects concerned. We propose a causal model of these relationships a...
Language(s): Inglés

Fuentes de variación en el tamaño de la semilla de la herbácea perenne Helleborus foetidus L. (Ranunculaceae)

Description: 11 páginas, 2 figuras, 3 tablas. , [EN] Seed size is one of the plant traits more thoroughly studied in plant sciences due to its pivoting ecological position between dispersal processes and emergence, survival and establishment of plant species. Frequently, most seed size variation is located within p...
Language(s): Español

Fruit losses and fruit removal in Olea europaea var. sylvestris Brot. (Oleaceae) Pérdidas de fruto y movilización de semillas en Olea europaea var. sylvestris Brot. (Oleaceae)

Description: We analyzed several aspects of the reproductive biology of wild olive (Olea europaea var. sylvestris. Brot.) related to seed dispersal. The importance of several fruit fates (the way and condition in which fruits leave the tree) is considered in two different habitats, one of which was surveyed in t...
Language(s): Inglés

Negative evidence of local adaptation to the establishment conditions in a perennial herb

Description: The differential adaptation of populations of the same species to their local environmental conditions through divergent selection, known as local adaptation, is a key step in the process of diversifica- tion of species. Here, we explore the local adaptation of the perennial mountain herb Helleborus...
Language(s): Inglés

Geographical variation in diaspore traits of an ant-dispersed plant (Helleborus foetidus): are ant community composition and diaspore traits correlated?

Description: 1 We explored geographical variation in the interaction between the elaiosome-bearing seeds of Helleborus foetidus and ant dispersers. We looked for correlation across nine Iberian localities, between diaspore traits and structural and functional characteristics of ant communities. 2 Mean diaspore...
Language(s): Inglés

Encontrado 22 documentos, página mostrada 1 de 3

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