author = "Herrera, Carlos M."

Encontrado 143 documentos, página mostrada 1 de 15

Genomic Scan as a Tool for Assessing the Genetic Component of Phenotypic Variance in Wild Populations

Author(s): Herrera, Carlos M.
Description: Methods for estimating quantitative trait heritability in wild populations have been developed in recent years which take advantage of the increased availability of genetic markers to reconstruct pedigrees or estimate relatedness between individuals, but their application to rea...
Language(s): Inglés

Seed dispersal and fitness determinants in wild rose: Combined effects of hawthorn, birds, mice, and browsing ungulates

Author(s): Herrera, Carlos M.
Description: Factors not directly related to either the plants or their avian seed-dispersal agents are ultimately responsible for the sign and magnitude of the average contribution of seed vectors to the fitness of Rosa canina plants in southern Spain. Coexistence with simultaneously fruiting Crataegus monogyna...
Language(s): Inglés

A trophic diversity index for presence-absence food data

Author(s): Herrera, Carlos M.
Description: An index to assess trophic diversity from presence-absence food data is proposed. The index is computed according to the expression {Mathematical expression}, where the {Mathematical expression}'s are the frequencies of occurrence of the various prey categories. The upper and lower limits of D are d...
Language(s): Inglés

Long-term dynamcis of mediterranean frugivorous birds and fleshy fruits: a 12 year study

Author(s): Herrera, Carlos M.
Description: The relationship between fleshy-fruited plants and their vertebrate seed dispersal agents often has been depicted as subject to important interannual variation, but no study has thus far documented such variation on a long-term basis. This paper presents the results of a 12-yr investiga...
Language(s): Inglés

Selection on Floral Morphology and Environmental Determinants of Fecundity in a Hawk Moth-Pollinated Violet

Author(s): Herrera, Carlos M.
Description: This paper presents the results of a 5—yr field study on the determinants of individual variation in maternal fecundity (seed production) in the narrowly endemic violet Viola cazorlensis (Violaceae), at a southeastern Spanish locality. Flowers of this species are characterized by a very long, thin s...
Language(s): Inglés

Activity pattern and thermal biology of a day-flying hawkmoth (Macroglossum stellatarum) under Mediterranean summer conditions

Author(s): Herrera, Carlos M.
Description: 1 The daily activity pattern and aspects of the thermal biology are described for the day-flying hawkmoth, Macroglossum stellatarum L. (Lepidoptera: Sphingidae), while foraging at a flowering population of Lavandula latifolia (Labiatae) under the dry-hot summer conditions of a southeastern Spani...
Language(s): Inglés

Individual flowering time and maternal fecundity in a summer-flowering mediterranean shrub: making the right prediction for the wrong reason

Author(s): Herrera, Carlos M.
Description: The study of the reproductive biology of those few Mediterranean perennials that flower during the summer drought period may provide an indirect test of the adaptive value of prevailing off-summer flowering in Mediterranean-climate plant communities. This paper presents a study of the c...
Language(s): Inglés

Historical effects and sorting processes as explanations for comtemporary ecological patterns: character syndromes in mediterranean woody plants

Author(s): Herrera, Carlos M.
Description: —Ecological patterns are not only a consequence of adaptive processes, but also influenced by phylogenetic constraints, historical effects, and sorting processes. In contrast to the attention paid to the influence of phylogeny on interspecific ecological patterns, historical effects and ...
Language(s): Inglés

Seed Dispersal by Animals: A Role in Angiosperm Diversification?

Author(s): Herrera, Carlos M.
Description: Seed dispersal by animals has sometimes been considered one of the factors helping to explain angiosperm diversification. Three predictions related to this hypothesis are examined here, namely, (1) biotic seed dispersal is a feature unique to angiosperms, or this group exhibits it proportionally mor...
Language(s): Inglés

Interspecific Variation in Fruit Shape: Allometry, Phylogeny, and Adaptation to Dispersal Agents

Author(s): Herrera, Carlos M.
Description: nvestigations on fruit and fruiting characteristics of animal—dispersed, fleshy—fruited plants have been generally interpreted in terms of adaptations by plants to dispersal agents. Most often, these studies did not formulate non—adaptive, alternative null hypotheses, and the potential influence of ...
Language(s): Inglés

Encontrado 143 documentos, página mostrada 1 de 15

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