Alfredo Valido

Alfredo Valido
Spanish National Research Council | CSIC · Doñana Biological Station

PhD

About

39
Publications
13,845
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1,751
Citations
Citations since 2017
0 Research Items
529 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100

Publications

Publications (39)
Conference Paper
Full-text available
Los continuos cambios inducidos por el hombre en el medio natural están provocando un empobrecimiento de las comunidades de frugívoros, afectando especialmente a las especies de mayor tamaño corporal. Cuando esto ocurre pueden desaparecer también los procesos ecológicos en los que intervienen (p.ej. dispersión de semillas), y provocar consecuencias...
Article
We analyzed the evolution of red/orange flowers in four putatively bird-pollinated species of Macaronesian Lotus, with the aim of investigating whether this floral trait evolved from a similar trait found in some entomophilous Lotus species, namely the ability to modify flower color to red after anthesis. First, we mapped the ability to modify flow...
Article
Full-text available
For tropical lowland rain forests, Denslow (1987) hypothesized that in areas with large-scale disturbances tree species with a high demand for light make up a larger proportion of the flora; results of tests have been inconsistent. There has been no test for warm temperate rain forests (WTRFs), but they offer a promising testing ground because they...
Article
Full-text available
Ecosistemas 22(2):125 [Mayo-Agosto 2013] Doi.: 10.7818/ECOS.2013.22-2.20 Artículo publicado en Open Access bajo los términos de Creative Commons attribution Non Comercial License. NOTAS ecosistemas REVISTA CIENTÍFICA DE ECOLOGÍA Y MEDIO AMBIENTE ISSN 1697-2473 / Open access disponible en www.revistaecosistemas.net © 2012 Los Autores. Editado por la...
Article
Full-text available
The functional or structural linkage among traits [phenotypic integration (PI)] within complex structures can constrain the evolutionary response of individual traits. To analyse whether frugivores with distinct sensory ecology have shaped the patterns of fruit diversification differently, we compared PI values of fleshy fruits that are consumed by...
Article
Full-text available
The chapters of this book on seed dispersal are divided into four parts: (1) frugivores and frugivory (8 chapters); (2) seed and seedling shadows (7 chapters); (3) seed fate and establishment (eight chapters); and (4) management implications and conservation (six chapters). The book presents both recent advances and reviews of current knowledge.
Chapter
The importance of body size in trophic ecology, as a determinant of both the occurrence and strength of feeding interactions, has long been acknowledged, but it is only recently that its role in structuring food chains and entire food webs has begun to be explored systematically. This chapter provides an overview of the role of body size in food we...
Article
Full-text available
The aim of this study was to investigate effects of introduced honey bees (Apis mellifera) on native pollination interactions of Echium wildpretii ssp. wildpretii in the sub-alpine desert of Tenerife. We selected two study populations, one dominated by honey bees, while the other was visited by many native insects. During peak activity period of in...
Article
We analyzed the frugivorous diet of the lizard Gallotia galloti, a Canary Island endemic, in relation to season and fruit availability in a xeric habitat from Tenerife. Gallotia galloti was omnivorous throughout the year (including >59% of plant material by volume in fecal pellets); only in the winter months (December and January) did invertebrates...
Article
Omnivorous endemic Canarian lacertids (Gallotia atlantica and G. galloti) do not present any specific digestive and physiological adaptations to herbivorous diet, compared to species and populations with a different degree of herbivory in the Canarian archipelago. The only characteristics that could be related to the type of diet were the number of...
Article
In this paper, we report observations of flower visitors of the endemic Echium wildpretii in Tenerife, Canary Islands. This plant inhabits the high altitudinal sub-alpine zone, which is characterized by a harsh climate, low species diversity and a short growing season. Echium wildpretii is a monocarpic perennial, producing a 2–3 m column-shaped, re...
Article
We describe the external morphology of a new giant lizard found alive on La Gomera Island (Canarian Archipelago), which had been previously described from subfossil bones. Adult size (SVL 135-190 mm) is comparable with the two largest living species (G. simonyi and G. stehlini) of the genus. It differs from the other species of Gallotia in the low...
Article
We present results of a three-year study on the frugivory, foraging behavior and factors influencing bird preference visits among conspecific fruiting shrubs of the 'Balo' (Plocama pendula), an endemic plant of low xerophytic zones in the Canary Islands. Only four bird species were recorded eating fruits of the 20 individual plants studied, includi...
Article
In this paper we present an unusual incidence of an introduced Camivora Felis catus as indirect seed disperser of plants that produce fleshy fruits in different ecosystems in the Canary Islands. Four hundred and twenty six seeds from at least 8 fleshy fruit plant species have been identified in the analysis of 1047 scat groups, the majority of them...
Article
The relationship between an endemic lizard (Gallotia galloti) and plants with fleshy fruits was examined in a xeric habitat on the island of Tenerife, Canary Islands. An analysis of 441 droppings collected in May 1991, showed that fruits are an important item in the diet of this omnivorous lizard; 92% and 56% of droppings contained fruits from two...
Article
Full-text available
Population density and foraging behaviour of the Canary Common Chaffinch (Fringilla coelebs ombriosa) was studied in a pine wood and an evergreen forest at El Hierro island (Canary Islands) to test the influence of food availability on habitat selection during the breeding season. Chaffinch density was significantly lower in the pine wood than in t...
Article
Full-text available
We study the leg morphology and feeding postures of two subspecies of the Blue Tit (Parus caeruleus; Tenerife island and the Iberian Peninsula) and the Coal Tit (Parus ater; Iberian Peninsula). We search for evidence supporting the hypothesis of convergent evolution in morphological and ecological traits and we discuss the role of ecomorphological...
Article
Full-text available
The habitat distribution between islands of the Common Chaffinch (Fringilla coelebs L.), viewed in relation to the presence of its potential competitor species, the Blue Chaffinch (Fringilla teydea Moquin-Tandon), has been studied for the Canary Islands (Tenerife and El Hierro). The Common Chaffinch was significantly denser in the pine woods of El...
Article
Full-text available
The main goal of the study was to shed light on the enigmatic world distribution of the Cneoraceae family, frequently, and until very recently, used as an example of the connection between the Mediterranean and the Caribbean floras. Specifically, we wanted to document the presence/absence of an endemic taxon, first collected in 1861 by Charles Wrig...

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