Manuel V. Marrero GómezTeide National Park · Conservation
Manuel V. Marrero Gómez
Licenciado en Ciencias Biológicas, Esp. Botánica
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Publications (94)
Aim
We analyse the oldest available data on the high‐elevation vegetation on Tenerife's Mt. Teide, namely the species shown in A. von Humboldt's (1817) Tableau Physique des Iles Canaries (TPIC), which is based on his own 1799 visit and an 1815 visit by L. von Buch and C. Smith. The analysis is of interest in the context of climate change and biotic...
Plants from arid environments can prevail with low fecundity, high survival and long lifespans. However, climate change may have an important impact on endangered species. In order to assess the effect of climatic fluctuations and change, we studied demographic processes in the narrow-range Canary Islands endemic Atractylis arbuscula Svent. & Micha...
Increasing species regression speeds are one of the consequences of global warming, which affect both rare and abundant species. However, long-term monitoring data are rarely available to understand the effects of global warming. Alpine ecosystems on islands are some of the most unique in terms of species composition around the world, with high pro...
The climate of the high mountains of Tenerife is characterized with temperature
data coming from eight automatic stations in the Teide National Park and its surroundings. It highlights the uniqueness and diversity of the climate of this high mountain area, with two well differentiated sectors, one cold and humid to the windward side in the northeas...
The recovery of threatened species is one of the essential objectives of conservation
in the Teide National Park, where just over half a dozen species of flora are classified
in the categories of endangered and / or vulnerable. The last decade has been particularly
successful in increasing the localities and abundance of these species, to the point...
Ecological monitoring in the Teide National Park has four branches : species, vegetation,
ecological processes and climate. In each of them, different variables are measured
mainly annually, but in some cases, such as climate, measurements are taken every ten minutes. Long data series are already available, which in some exclosures reaches more tha...
El género Viola es uno de los más amenazados por el cambio climático y los herbívoros invasores en la alta montaña de Canarias, estando representado actualmente por los endemismos insulares V. palmensis (La Palma), y V. cheiranthifolia y V. guaxarensis (Tenerife). En este trabajo se ha modelizado la distribución potencial de estas tres especies en...
La vegetación de alta montaña de Tenerife está formada actualmente por un matorral ralo con retama (Spartocytisus supranubius) y rosalillo (Pterocephalus lasiospermum) como especies dominantes. Este ecosistema está sufriendo un calentamiento importante que está teniendo consecuencias en la estructura y composición de la vegetación. En efecto, mient...
Invasive alien species and climate change are two of the main current threats to conservation of biodiversity worldwide. Their effects have been extensively studied individually, but we know less about their combined effect. This study analyzes the population changes in the plant community of the high mountain legume shrub habitat of Tenerife over...
Viola guaxarensis M. Marrero, Docoito Díaz & Martín Esquivel, sp. nov., belonging to V. sect. Melanium Ging. (Violaceae), is described and illustrated. It is a small chamaephyte currently known in only two localities within the high-mountain zone of Tenerife, Canary Islands. Data on aspects of its morphology, ecology, rarity and conservation status...
Alpine ecosystems on islands are among the most isolated on Earth, leading to very high rates of endemism. Endemic species on oceanic islands are particularly vulnerable to invasive herbivores. In the alpine zone of Tenerife, which harbors a unique endemic flora, the dominance pattern of the two most dominant species in our days (Spartocytisus supr...
Genetic data could be considered irrelevant to the conservation of species in imminent danger, and that habitat protection and ex situ conservation strategies should be carried out regardless of the existence of estimates of genetic diversity. However, genetic data are needed to determine the current state of diversity of the species, the genetic s...
Inventario de humedales naturales y artificiales de importancia para la aves presentes en las Islas Canarias
The International Union for Conservation of Nature (IUCN) Red List Index (RLI) is used to measure trends in extinction risk of species over time. The development of 2 red lists for Spanish vascular flora during the past decade allowed us to apply the IUCN RLI to vascular plants in an area belonging to a global biodiversity hotspot. We used the Span...
This book details the methodology used by all research groups in the data gathering for the publication of the "Atlas y Libro Rojo de la Flora Vascular Amenazada de España" (Atlas and Red Book of Threatened Vascular Flora of Spain)
After a short summary of the different criteria used to list threatened species of the Canary Islands, the present article deal with the methodology used in the Teide National Park to identify the conservation status of endangered plants to face recovery strategies. Special emphasis is made on population viability analysis and the use of molecular...
Identificación Planta de base leñosa, de hasta 20 cm de alto con hojas lanceoladas, tomentosas por el envés y ver-des por el haz. Inflorescencia con 6-10 flores que tienen los sépalos externos lineares y los internos lanceolados. Pétalos amarillos más largos que los sépalos internos. Androceo con 45-50 estam-bres. Estilo más largo que los estambres...
POBLACIONES ESTUDIADAS Dentro de la única localidad conocida se instalaron dos parcelas de 10 x 10 m, en aquellos sectores donde la verticalidad no comprometía el acceso a los ejem-plares. En conjunto se marcó un total de 127 individuos, lo que constituye una muestra representativa del total de la población, para la cual sólo se han censado 166 eje...
POBLACIONES ESTUDIADAS Se instaló una parcela de 10 x 10 m en cada localidad, incluyendo aquellos ejem-plares naturales existentes que fuesen accesibles: 13 ejemplares en Barranco del Agua y 16 en Barranco de los Cochinos. En la primera de las localidades ci-tadas se censó un total de 52 ejemplares naturales y 196 individuos procedentes de refuerzo...
Variation at five polymorphic microsatellite loci was used to investigate genetic diversity and differentiation of two tetraploid Canarian endemics, Bencomia exstipulata and B. caudata. Data were analysed and are discussed in terms of tetrasomic (autotetraploid) and disomic (allotetraploid) inheritance. In both cases, genetic diversity values were...
Arico, ésta se obvió del muestro habida cuenta de la dificultad extrema para acceder a los ejemplares. Por su parte, en el Barranco de Añavingo se instaló una parcela de 10 x 10 m que in-cluía inicialmente 21 individuos, estando la totalidad de la población constituida por unos 502 ejemplares, la mayor parte de los cuales se ubica en cantiles y pe-...
En el año 2000 salió publicada la última Lista Roja sobre las plantas vasculares españolas, que evaluaba sus amenazas en todo el país según las categorías de la Unión Internacional para la Conservación de la Naturaleza (UICN) reformadas en 1994, más cuantitativas y objetivas. Aquel documento dio a conocer la situación de riesgo de 1.414 especies y...
Aeonium decorum var. alucense and Aichryson laxum var. latipetalum, from eastern La Gomera and southern Tenerife, respectively, are described as varieties new to science and illustrated. New combinations in Aeonium (A. arboreum subsp. holochrysum, A. canariense subsp. christii, A. canariense subsp. latifolium, A. canariense subsp. virgineum, A. lin...
Gnaphalium teydeum and G. luteo-album (Asteraceae) are two closely congeneric taxa native to the Canary Islands. While G. luteo-album is widespread in the Macaronesian Region, G. teydeum is endemic to the island of Tenerife and considered endangered by IUCN. Using the RAPD technique this study investigated
the level and apportionment of genetic div...
We examined the levels and apportionment of genetic variation of the 11 known subpopulations of Atractylis preauxiana at 95 RAPD loci to help streamline a conservation strategy for this Canarian endemic taxon, which is in a critical situation
because of the constant exposure of plants to intensive, uncontrolled anthropic action in the last few deca...
Narrow endemic plants are highly vulnerable to extinction as a result of human disturbance and climate change. We investigated the factors affecting the population viability of Helianthemum juliae, a perennial plant endemic to the Teide National Park on Tenerife, Canary Islands. One population was demographically monitored from 1992 to 2001 and ana...
Echium auberianum constituye un endemismo exclusivo de las cumbres de la isla de Tenerife incluido como “Sensible a la Alteración de su Hábitat” en el Catálogo de Especies Amenazadas de Canarias. Con el fin de diagnosticar su verdadero estado de conservación, desde el año 1998 a 2002 se realizó un estudio de 4 poblaciones representativas de la espe...
Stemmacantha cynaroides es un endemismo exclusivo de lascumbres de la isla de Tenerife, para el cual se ha observado una evidentedeclinación de efectivos en los últimos años como consecuencia de la incidenciade herbívoros introducidos (muflones y conejos). De esta forma, actualmenteapenas sobreviven 170 ejemplares reproductores, todos dentro del Pa...
Especie sujeta a un programa de conservación que ha propiciado una cierta estabilidad en sus poblaciones. Aún así apenas existen 500 ejemplares y diversos factores de amenaza impiden una recuperación efectiva. Identificación Arbusto de 2 m de alto. Hojas híspidas, ovado-lanceoladas agrupadas en rosetas apicales. Inflo-rescencia en tirso ovoideo-cil...
Endemismo canario con una docena de poblaciones que albergan algo menos de 2.000 ejemplares. Su principal factor de amenaza parecen ser los herbívoros introducidos que impiden la progresión de sus poblaciones. Identificación Hierba perenne o pequeño arbusto de hasta 50 cm. Hojas lanceoladas, agudas, de hasta 3 cm de largo, pubescentes, con el nervi...
Especie que hasta hace pocos años se consideraba bastante amenazada. Actualmente, sus efectivos se han incrementado enormemente tras las actuaciones de conservación realizadas en el Parque Nacional de la Caldera de Taburiente. Identificación Arbusto de 2 a 4 m de alto. Hojas simples y sési-les, de elípticas a casi lineares. Flores solitarias, amari...
Especie con sólo dos poblaciones naturales de escasos efectivos y en islas diferentes. Existen además poblaciones reintroducidas que han logrado incrementar sus efectivos hasta un total de 654 ejemplares.
Metodología de obtención de datos en las poblaciones naturales en el poryecto AFA
An approach to an overall management planning for the conservation of endangered species within protected natural areas is presented, based mainly on the development of methods for the diagnosis of the conservation status and the identification of critical life cycle stages (phenophases) of target species. This model includes other aspects inherent...
Blue bugloss (Echium acanthocarpum Svent.) is an endangered vascular plant endemic to La Gomera, Canary Islands, Spain. Field observations suggest that establishment of this species may be limited by low seed dispersal, inhibition of germination by parent plants, and intraspecific competition among seedlings. We studied seed germination of E. acant...
En el presente trabajo se ofrecen resultados preliminares de la ejecución del Plan de Recuperación de la Flora Amenazada del Parque Nacional de Garajonay, concretamente sobre los taxones Pericallis hansenii (Kunkel) Sunding (en peligro de extinción), Gonospermum gomerae Bolle (vulnerable) e Ilex perado Ait. ssp. lopezlilloi (Kunkel) A. Hansen & Sun...
La ley 4/1989 de conservación de flora establece la obligatoriedad de desarrollar planes de recuperación de aquellos taxones catalogados como "en peligro de extinción". Hasta el momento el número de planes desarrollados es realmente reducido. En este trabajo se señalan las dificultades que se presentan para redactar dichos protocolos y, en el conte...
Patterns of variation at 13 isozyme loci were examined in 11 populations in three Cistus species strictly endemic to the Canary Islands. Cistus osbaeckiaefolius and C. chinamadensis display low levels of isozyme variation associated with moderate to high interpopulation differentiation, which probably arose through historical bottlenecks in a lands...
Patterns of variation at 13 isozyme loci were examined in 11 populations in three Cistus species strictly endemic to the Canary Islands. Cistus osbaeckiaefolius and C. chinamadensis display low levels of isozyme variation associated with moderate to high interpopulation differentiation, which probably arose through historical bottlenecks in a lands...
Blue bugloss (Echium acanthocarpum Svent.) is an endangered endemic plant of La Gomera (Canary Islands). Little is known about its autecology. A seedling cohort was monitored to reveal the causes of extreme fluctuations observed in the population. For this purpose we analysed two plots, one in which we removed the litter and other plants (managed p...
