Andrés Mellado-Díaz

Grupo Tragsatec

1. Running waters in Mediterranean regions are strongly regulated by dams, which produce significant alterations to natural flow regimes. Climate change will reduce discharge and increase flow intermittence in Mediterranean streams, which will lead to an intensified flow regulation to meet water demands. Very little is known about how the functiona...

As the number of introduced species keeps increasing unabatedly, identifying and prioritising current and potential Invasive Alien Species (IAS) has become essential to manage them. Horizon Scanning (HS), defined as an exploration of potential threats, is considered a fundamental component of IAS management. By combining scientific knowledge on tax...

Context Global change, including land-use change and habitat degradation, has led to a decline in biodiversity, more so in freshwater than in terrestrial ecosystems. However, the research on freshwaters lags behind terrestrial and marine studies, highlighting the need for innovative approaches to comprehend freshwater biodiversity. Objectives We i...

A partir del estudio de muestras recolectadas en los últimos años y revisión de especímenes de herbario, se aportan un total de 23 novedades corológicas provinciales para España. Hyophila involuta, una especie conocida únicamente de una localidad ibérica en el valle de Baztán en Navarra, se cita aquí de cinco nuevas localidades, siendo novedad para...

Los ríos temporales (RTs) son ecosistemas fluviales en los que los efectos de las perturbaciones antrópicas se mezclan con los de la propia perturbación natural que impone la temporalidad del flujo. A pesar de los avances en el conocimiento de los RTs, todavía persisten muchas lagunas de conocimiento que limitan el desarrollo de metodologías adecua...

Mellado-Díaz, A., Guerra, J. & Cano, M. J. 2023. New records of Fissidens jansenii Sérgio & Pursell (Fissidentaceae, Bryophyta) from the Iberian Peninsula. – Herzogia 36: 279 –282. Fissidens jansenii Sérgio & Pursell is reported new to Spain on the basis of six specimens from the northern half of the Iberian Peninsula; its ecological behaviour is d...

Aquatic ecosystems are particularly vulnerable to the introduction of non-indigenous species (NIS), leading to multi-faceted ecological, economic and health impacts worldwide. The Iberian Peninsula comprises an exceptionally biodiverse Mediterranean region with a high number of threatened and endemic aquatic species, most of them strongly impacted...

During extensive Spanish river macrophyte and invertebrate surveys, the freshwater chlorophyte Ulvella spongophila was detected growing inside the freshwater sponge Ephydatia fluviatilis attached to stones. This finding is relevant from the phy¬cological, biogeographical and ecological points of view, and is the second world record of the species a...

The authors regret that the printed version of the above article contained an incomplete version of Table 1, in which only 20 invasive alien species were published out of the top-ranked 24 that should have been. The correct Table 1 is shown below. The authors apologise for any inconvenience caused.

An important goal of LIFE INVASAQUA is to develop tools that will improve management and increase the efficiency of the Early Warning and Rapid Response (EWRR) framework for Invasive Alien Species (IAS) in the Iberian Peninsula. Horizon scanning for high risk IAS is basic when implementing measures to reduce new invasions and to focus efforts on th...

Se presenta una lista actualizada de las especies exóticas que se encuentran en etapa de establecimiento o de propagación de la invasión en aguas continentales de la península ibérica. La lista está basada en la evaluación sistemática de los datos en colaboración con un amplio equipo de expertos de España y Portugal. Esta lista de actualización es...

An updated list is presented of the alien species in the establishment or spread invasion stage in in-land waters at the Iberian Peninsula. The list is based on a systematic assessment of information in collaboration with a wide expert team from Spain and Portugal. This updated list is an important tool supporting the implementation of the IAS Regu...

An updated list is presented of the alien species in the transport or introduction invasion stage in inland waters of the Iberian Peninsula. The list is based on a systematic assessment of information in collaboration with a wide expert team from Spain and Portugal. This list is an important tool to support the implementation of the IAS Regulation,...

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

The use of functional information in the form of species traits plays an important role in explaining biodiversity patterns and responses to environmental changes. Although relationships between species composition, their traits, and the environment have been extensively studied on a case-by-case basis, results are variable, and it remains unclear...

Esta es una herramienta desarrollada para el calculo del tamaño muestral elaborada en el marco del proyecto “Establecimiento de un sistema estatal de seguimiento del Estado de Conservación de los Tipos de Hábitats en España ”. Para la correcta utilización de esta herramienta es necesario leer el documento del cual forma parte: Sánchez-González J...

The risk of extinction of Eurylophella iberica Keffermuller and Da Terra 1978 (Ephemeroptera, Ephemerellidae) was assessed for the first time after taking into account recently published distributional data using a method specifically designed for aquatic insects. The results showed that the species can be considered "moderately vulnerable". We dis...

The first record of Buchonomyia thienemanni Fittkau, 1955 (Diptera, Chironomidae) from northeastern Spain is presented (Gállego river at Santa Eulalia de Gállego, Zaragoza province). This interesting species has been previously recorded from Spain in the Ulla river (A Coruña, northwestern Spain) and in the upper reaches of the Guadalquivir river (J...

Eurylophella iberica Keffermüller and Da Terra, 1978 is an endemic insect species of the Iberian Peninsula whose distribution has been poorly studied to date with rather old and scattered records. Here we compiled all existing distribution records and add new records from recent sampling activities. We also used this updated distributional informat...

First record of Synidotea laticauda Benedict, 1897 (Crustacea: Isopoda) in the Guadiana Estuary (SW Iberian peninsula) The exotic isopod species Synidotea laticauda B. 1897 is first reported in the Guadiana Estuary, where it was detected, during 2009 and 2010, in the middle section (12-20 km from the mouth) and in the lower part of the upper sectio...

In the Iberian Peninsula is confirmed the presence of L. lusitanicus and the recent detection of L. tineiformes. However, less is known about the presence of L. interruptus in Western Europe, especially in the Iberian Peninsula, where its occurrence has been considered doubtful and needing further and specific research. During a biomonitoring sampl...

The presence of the white-clawed crayfish, Austropotamobius pallipes (Lereboullet 1858), within the Murcia Region is confirmed. So far, the scarce information on its historical presence in this administrative region (only an imprecise record published in 1964 and interviews with nature wardens that worked there at the beginning of the 70’s) placed...

Flow prediction in ungauged basins is an important task for water resources planning and management, and remains a fundamental challenge for hydroecological research. Based on a previous classification of streams and rivers in the Ebro River basin (Spain), where 6 natural flow-regime types were identified (Solans & Poff 2013), we apply a new predic...

The investigation of flow–ecology relationships constitutes the basis for the development of environmental flow criteria. The need to understand hydrology–ecology linkages in natural systems has increased owing to the prospect of climate change and flow regime management, especially in water-scarce areas such as Mediterranean basins. Our research q...

The investigation of empirical regional flow-ecology relationships constitutes the basis for the development of environmental flow criteria and water resource management. In this sense, the need to understand ecology-hydrology linkages in natural systems, and define reference conditions against which modified systems can be compared, has increased...

Con el fin de actualizar la métrica de los índices PRTI y ZRTI elaborados en 2009 (CHE 2009) y asignar valores de tolerancia eutrófica a las nuevas especies encontradas en los muestreos realizados durante el verano de 2010 y 2011 en 45 embalses de la cuenca del río Ebro, como parte de la aplicación de la Directiva Marco Europea del Agua, se ha real...

Résumé. La prospection de 17 localités du bassin versant de Oued Laou a permis l'identification de 22 espèces d'Odonates, parmi lesquelles, Coenagrion scitulum (Rambur, 1842), Pyrrhosoma nymphula nymphula (Sulzer, 1776) et Onychogomphus costae Sélys, 1885 sont de nouvelles citations pour ce bassin versant. Les récentes recherches menées dans le cad...

La memoria contiene los resultados de los trabajos de la explotación de la red de control biológico en ríos, realizados durante el año 2007, en las MAS de ríos de las Redes de Control Operativo, Control de Vigilancia y de Referencia seleccionadas para su estudio este año 2007. Todo ello se enmarca dentro de la asistencia técnica para el DISEÑO Y EX...

Water beetles were examined for use as potential biodiversity indicators in continental aquatic ecosystems in a semiarid Mediterranean region, the Segura river basin (SE Spain). The indicator value of water beetles was investigated by examining the degree to which their species richness patterns was correlated with other groups (Plecoptera, Trichop...

A partir de los muestreos de vegetación acuática llevados a cabo en 59 estaciones localizadas en la Cuenca del Segura durante el periodo 1998-2004, y teniendo en cuenta la tolerancia a la contaminación orgánica y por tanto el valor indicador de los táxones recolectados, se ha elaborado un índice (1M) para su utilización como índice de calidad que n...

Capítulo 1. Evaluación biológica con macroinvertebrados en ríos de la cuenca del Segura: efectos de las tendencias estacionales, métodos de procesado y resolución taxonómica sobre patrones multivariantes y métricas de diversidad. Capítulo 2. Las comunidades de macroinvertebrados de la cuenca del Río Segura: tipos de ríos, táxones indicadores y fact...

Macroinvertebrates and selected physico-chemical characteristics (temperature, pH, basin area, stream order, altitude, discharge, conductivity, ammonium, nitrites, nitrates, phosphates) were studied in 157 sites distributed over 12 Mediterranean fluvial basins located in the Iberian Peninsula and in the island of Majorca. A total of 127 taxa were r...

Using baseline data obtained during the first phase (1999-2001) of the project GUADALMED, we examined the applicability of the IBMWP (Iberian Bio-monitoring Working Party; former BMWP') to assess the quality of 65 rivers and streams within 12 Iberian Mediterranean basins. Moreover, criteria for the establishment of classes to assess the ecological...

del Agua (DMA) (D.O.C.E., 2000) prevé que los países miembros determinen el estado ecológico de sus aguas continentales basándose en criterios biológicos. La escala de calidades biológicas medidas deberá ser objeto de una intercalibración entre los sistemas emple-ados por los Estados miembros que, por lo que concierne a los ríos mediterráneos, es u...

El proyecto GUADALMED, cuyo objetivo principal es elaborar un índice integrado que defina el estado ecológico de los ríos mediterráneos españoles, abarca 12 cuencas hidrográficas, 10 de ellas situadas en la vertiente mediterránea de la Península Ibérica y 2 en las Islas Baleares. La localización de las mismas abarca un gradiente latitudinal, térmic...

Using baseline data obtained during the first phase (1999-2001) of the project GUADALMED, we examined the applicability of the IBMWP (Iberian Bio-monitoring Working Party; former BMWP') to assess the quality of 65 rivers and streams within 12 Iberian Mediterranean basins. Moreover, criteria for the establishment of classes to assess the ecological...

A rapid protocol for Evaluation of the Ecological Status of Mediterranean rivers (RBP) has been designed within the GUADALMED project. This protocol provides the necessary methodology to determine the value of three indices: the QBR index (to evaluate riparian quality), the IBMWP index (former BMWP' for the assessment of biological quality of water...

A preliminary analysis was conducted of the river types in the GUADALMED project using the river typology proposed in the Water Framework Directive (WFD) in its annex 2. Using System A, 16 different types were found, a number too high for water management purposes and such typology lacks a supportive ecological basis. For 5 of these 16 ecotypes, no...

The aim of the GUADALMED Project is to produce an integrated index to define the ecological status of Spanish Mediterranean rivers. The project includes 12 watersheds: 10 in the Mediterranean watershed of Iberian Peninsula, and 2 in the Balearic Islands, located along a latitudinal, thermal and pluviometric gradient. A total of 157 sampling sites f...

The development of the Water Framework Directive in European countries needs standard sampling methods to evaluate the ecological status of freshwaters. Methods for use in monitoring surveys, should be suitable for non specialists. Therefore, standard protocols are necessary for the intercomparison of results from different countries. Similarly, th...

The water Frame Directive (WFD) establishes the need to define reference conditions in order to determine the ecological status of all the test sites from each ecotype. Several criteria may be used to select reference conditions. In the GUADALMED project, five localities per basin were selected a priori according to the experience of experts, which...

Macroinvertebrates and selected physico-chemical characteristics (temperature, pH, basin area, stream order, altitude, discharge, conductivity, ammonium, nitrites, nitrates, phosphates) were studied in 157 sites distributed over 12 Mediterranean fluvial basins located in the Iberian Peninsula and in the island of Majorca. A total of 127 taxa were r...