La Colección de Anfibios de Madrid del Museo Nacional de Ciencias Naturales y su utilidad en conservación

Martínez‐Solano, Íñigo; Fernández, José

doi:10.3989/graellsia.2003.v59.i2-3.238

Cited by 12 publications

(8 citation statements)

References 6 publications

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“…In addition, both species have been described as benthic animals, which live at the bottom of ponds and rasp similar food from submerged vegetation and substrate [ 35 ]. In temporary ponds, both species often suffer high mortality related to pond desiccation [ 38 , 39 ]. This process increases competition within and between species for those resources that allow individuals to develop as quickly as possible.…”

Section: Methodsmentioning

confidence: 99%

Trophic Strategies of a Non-Native and a Native Amphibian Species in Shared Ponds

et al. 2015

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One of the critical factors for understanding the establishment, success and potential impact on native species of an introduced species is a thorough knowledge of how these species manage trophic resources. Two main trophic strategies for resource acquisition have been described: competition and opportunism. In the present study our objective was to identify the main trophic strategies of the non-native amphibian Discoglossus pictus and its potential trophic impact on the native amphibian Bufo calamita. We determine whether D. pictus exploits similar trophic resources to those exploited by the native B. calamita (competition hypothesis) or alternative resources (opportunistic hypothesis). To this end, we analyzed the stable isotope values of nitrogen and carbon in larvae of both species, in natural ponds and in controlled laboratory conditions. The similarity of the δ15N and δ13C values in the two species coupled with isotopic signal variation according to pond conditions and niche partitioning when they co-occurred indicated dietary competition. Additionally, the non-native species was located at higher levels of trophic niches than the native species and B. calamita suffered an increase in its standard ellipse area when it shared ponds with D. pictus. These results suggest niche displacement of B. calamita to non-preferred resources and greater competitive capacity of D. pictus in field conditions. Moreover, D. pictus showed a broader niche than the native species in all conditions, indicating increased capacity to exploit the diversity of resources; this may indirectly favor its invasiveness. Despite the limitations of this study (derived from potential variability in pond isotopic signals), the results support previous experimental studies. All the studies indicate that D. pictus competes with B. calamita for trophic resources with potential negative effects on the fitness of the latter.

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Section: Methodsmentioning

confidence: 99%

Trophic Strategies of a Non-Native and a Native Amphibian Species in Shared Ponds

et al. 2015

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“…For Amphibia, I followed Martínez-Solano & González Fernández (2003). In relation to Reptilia, I used the Atlas y Libro Rojo de los Anfibios y Reptiles de España (Pleguezuelos et al, 2002 (Palomo & Gisbert, 2002).…”

Section: Methodsunclassified

A survey of available molecular markers for Vertebrate species present in Comunidad de Madrid

Boto¹

2006

GRAELLSIA

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In this paper I present a survey for molecular markers available for Vertebrate species inhabiting the Comunidad de Madrid, with the aim of being useful to researchers working on the characterization of animal biodiversity in this area. Key words: Molecular markers, Vertebrate, Madrid. RESUMEN Estudio de los marcadores moleculares disponibles para las especies de vertebrados presentes en la Comunidad de MadridEn este trabajo presento los resultados de una búsqueda en bases de datos de marcadores moleculares para especies de Vertebrados presentes en la Comunidad de Madrid, en la esperanza de que este trabajo pueda ser de utilidad para aquellos investigadores involucrados en la caracterización de biodiversidad animal en esta Comunidad.

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“…Despite these difficulties, a number of attempts have been made to use the information available in biological collections to determine the identities and numbers of species present in particular areas. In most of these studies, the region of interest has been divided into a grid of squares with sides of between 10 and 100 km in length (10 km, Prendergast et al , 1993a; 1 degree, Kress et al , 1998; 1 degree, Peterson, Navarro‐Siguenza & Benitez‐Diaz, 1998; 3 to 5 min, Schoenfelder, 1999; 1 degree, O’Hara & Poore, 2000; 1/2 degree, Soberón et al , 2000; 1 degree, Crisp et al , 2001; 11 km, Joye et al , 2002; 15 min, Garcillan & Ezcurra, 2003; 10 km, Martinez‐Solano & Gonzalez Fernandez, 2003; 0.25 deg, Parnell et al , 2003; 5 min, Gonzalez‐Espinosa et al , 2004; 0.5 degree, Rovito et al , 2004; 1 degree, Serrato, Ibarra‐Manriquez & Oyama, 2004; 10 km, Stoch, 2004; 0.25 deg, Richardson et al , 2005), and these squares become the areas under consideration. In some cases the areas have been defined politically or geographically (Fisher & Shaffer, 1996; Petersen & Meier, 2003; Petersen, Meier & Nykjaer, 2003; Wang et al , 2003).…”

Section: Reviewmentioning

confidence: 99%

Biological collections and ecological/environmental research: a review, some observations and a look to the future

2010

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Housed worldwide, mostly in museums and herbaria, is a vast collection of biological specimens developed over centuries. These biological collections, and associated taxonomic and systematic research, have received considerable long-term public support. The work remaining in systematics has been expanding as the estimated total number of species of organisms on Earth has risen over recent decades, as have estimated numbers of undescribed species. Despite this increasing task, support for taxonomic and systematic research, and biological collections upon which such research is based, has declined over the last 30-40 years, while other areas of biological research have grown considerably, especially those that focus on environmental issues. Reflecting increases in research that deals with ecological questions (e.g. what determines species distribution and abundance) or environmental issues (e.g. toxic pollution), the level of research attempting to use biological collections in museums or herbaria in an ecological/environmental context has risen dramatically during about the last 20 years. The perceived relevance of biological collections, and hence the support they receive, should be enhanced if this trend continues and they are used prominently regarding such environmental issues as anthropogenic loss of biodiversity and associated ecosystem function, global climate change, and decay of the epidemiological environment. It is unclear, however, how best to use biological collections in the context of such ecological/environmental issues or how best to manage collections to facilitate such use. We demonstrate considerable and increasingly realized potential for research based on biological collections to contribute to ecological/environmental understanding. However, because biological collections were not originally intended for use regarding such issues and have inherent biases and limitations, they are proving more useful in some contexts than in others. Biological collections have, for example, been particularly useful as sources of information regarding variation in attributes of individuals (e.g. morphology, chemical composition) in relation to environmental variables, and provided important information in relation to species' distributions, but less useful in the contexts of habitat associations and population sizes. Changes to policies, strategies and procedures associated with biological collections could mitigate these biases and limitations, and hence make such collections more useful in the context of ecological/environmental issues. Haphazard and opportunistic collecting could be replaced with strategies for adding to existing collections that prioritize projects that use biological collections and include, besides taxonomy and systematics, a focus on significant environmental/ecological issues. Other potential changes include increased recording of the nature and extent of collecting effort and information associated with each specimen such as nearby habitat and other individuals observed but not collec...

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La Colección de Anfibios de Madrid del Museo Nacional de Ciencias Naturales y su utilidad en conservación

Cited by 12 publications

References 6 publications

Trophic Strategies of a Non-Native and a Native Amphibian Species in Shared Ponds

Trophic Strategies of a Non-Native and a Native Amphibian Species in Shared Ponds

A survey of available molecular markers for Vertebrate species present in Comunidad de Madrid

Biological collections and ecological/environmental research: a review, some observations and a look to the future

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