Juan Lomas

Agencia de Medio Ambiente y Agua · Biodiversity

We studied a Triops population from a Mediterranean temporary pond located in Guadalcázar, a township in the western part of Córdoba Province. There are four morphologically similar species of Triops occurring in the SW Iberian Peninsula. In particular, the two species found in southern Andalusia, T. baeticus and T. gadensis, cannot reliably be tol...

In coastal dunes, shrub encroachment disrupts natural disturbance, and reduces habitat heterogeneity and species composition. In this paper, we implemented a pilot scale trial aimed at restoring coastal dunes affected by the encroachment by the shrub Retama monosperma (hereinafter Retama) as well as strengthening the populations of Thymus carnosus...

First record of Linderiella jebalae Boix, Sala, Escoriza & Alonso (Crustacea, Branchiopoda, Anostraca) on the Iberian Peninsula. Dispersal across the Strait of Gibraltar? We report the first record of Linderiella jebalae in the Iberian Peninsula from two temporary ponds in La Línea de la Concep-ción (Cádiz, southern Spain). This species was describ...

Aleppo pine Pinus halepensis is a tree native to the Mediterranean basin. Even within its native range, P. halepensis may behave as an invasive species when planted beyond the original forest areas. Despite its potentially negative effects on the receiving ecosystems, little is known about the response of native plant communities following removal...

A rapid response action carried out against the invasion of water hyacinth (Eichhornia crassipes) in the Guadalquivir River branch in Seville (Southern Spain) is described and analyzed. Removal was implemented and coordinated by the regional environmental Council, National security forces and public companies. Immediately after its detection, the d...

El comercio de quelonios acuáticos como animales de compañía y su eventual liberación o escape ha conllevado la detección de especies exóticas naturalizadas o formando poblaciones invasoras en ecosistemas acuáticos. La importación de Mauremys spp. exóticos implica una nueva amenaza para la conservación de los ecosistemas acuáticos, debido a su capa...

Resumen Se informa del hallazgo de la planta acuática exótica invasora Eichhornia crassipes en la Dársena o canal Alfonso XIII, un brazo regulado del río Guadalquivir, en Sevilla (S. de la Península Ibérica). Se trata de la primera cita de esta especie para la provincia de Sevilla y se añade a diversas referencias ocasionales que existían en Andalu...

We present the finding of the invasive exotic aquatic plant Eichhornia crassipes in the Shipway or Alfonso XIII canal, a regulated tributary of the Guadalquivir river, Seville (S. Iberian Peninsula). This is the first record of this species for the province of Seville and it is added to several occasional references that previously had been repo...

• The knowledge and awareness that the general public has about aquatic invertebrates is often poor, even when they are highly threatened. The frequent lack of popular names and the unattractiveness of the scientific ones may be among the factors hindering the knowledge of these organisms and, consequently, the awareness of their conservation statu...

The red swamp crayfish Procambarus clarkii is the most widespread invasive crayfish in Europe, and responsible for a plethora of negative impacts on aquatic ecosystems. Most capture methods used for controlling crayfish populations have a bias towards the capture of adults, however, the removal of the young-of-the-year crayfish (YOY) may be essenti...

Very few mass stranding events of invertebrates have been reported. In this paper, we report a mass stranding of multiple benthic organisms occurred at Punta Umbría beach (S Spain) after the passage of storm Emma (28 February to 5 March 2018). The most abundant organisms were identified, and exceptional meteorological and oceanographic events were...

Despite the increasing number of invasive species, protocols devoted to assess the feasibility (i.e., probability of success or failure) of management actions in the field are scarce, yet success depends on a broad scope of issues beyond the biology of species and the ecosystem to be managed. In this paper we make a retrospective analysis of 90 act...

One year after mechanical removal of invasive Agave spp. in coastal sandy habitats in southeast Spain, the native plant composition showed partial recovery. However, the subsequent proliferation of Agave rhizome offshoots will require periodic rounds of manual, selective control.

We present the results of an intervention to control prickly pear Opuntia dillenii in an area of coastal dunes with Juniperus spp. and Pinus pinea at the 'Laguna del Portil' Site of Community Importance, Huelva, southern Spain, in 2015-2017. In the first stage, a total of 2,266 m³ (approximately 460 MT) of the cactus was removed using heavy machine...

The deficiency in the distributional data of invertebrate taxa is one of the major impediments acting on the bias towards the low awareness of its conservation status. The present study sets a basic framework to understand the large branchiopod distribution in the Iberian Peninsula and Balearic Islands. Since the extensive surveys performed in the...

The deficiency in the distributional data of invertebrate taxa is one of the major impediments acting on the bias towards the low awareness of its conservation status. The present study sets a basic framework to understand the large branchiopods distribution in the Iberian Peninsula and Balearic Islands. Since the extensive surveys performed in the...

The Iberian Peninsula harbours 24 taxa of native large branchiopods (LBs). Most of them inhabit Mediterranean temporary ponds, which are priority habitats under the EU Habitats Directive. In this work, Iberian LBs were evaluated using IUCN Red List criteria based on geographic range (extent of occurrence, area of occupancy, number of locations, hab...

Se documentan los primeros registros de Ipomoea imperati (Vahl) Griseb. (Convolvulaceae) en la provincia de Cádiz. Esta especie rizomatosa y rastrera es nativa de Norteamérica y se ha encontrado formando poblaciones naturalizadas incipientes (entre 300 - 750 m2 ) en playas de los municipios de Barbate y Algeciras. Ipomoea imperati coloniza en ambos...

Colocasia esculenta (L.) Schott, Araceae, is becoming an invasive plant in Spain (Iberian Peninsula). Four newly invaded localities are presented in this study, and its population status, habitat and climatic features in Spain are presented. The species has colonised some localities in south Portugal. To characterise the species' climatic tolerance...

This work reports the first population of Nymphaea × marliacea ‘Rosea’ in the wild in the Iberian Peninsula. The population is the southernmost known so far in Europe and is located under the warmest climate type of all European populations of N. × marliacea. Nymphaea × marliacea is an artificial hybrid raised by J. B. Latour-Marliac at the end of...

This work reports the first population of Nymphaea × marliacea ‘Rosea’ in the wild in the Iberian Peninsula. The population is the southernmost known so far in Europe and is located under the warmest climate type of all European populations of N. × marliacea. Nymphaea × marliacea is an artificial hybrid raised by J. B. Latour-Marliac at the end of...

The subtropical ocean gyres are recognized as great marine accummulation zones of floating plastic debris; however, the possibility of plastic accumulation at polar latitudes has been overlooked because of the lack of nearby pollution sources. In the present study, the Arctic Ocean was extensively sampled for floating plastic debris from the Tara O...

Human-driven landscape changes may promote plant invasions by increasing propagule pressure and providing favourable conditions for non-native species to establish and spread. The increase in invasion levels might not be immediate but rather exhibit a time-lag (i.e. invasion debt). Moreover, the relationship between invasion and landscape history (...

En este trabajo se presenta una muestra de citas de animales exóticos peligrosos encontrados en Andalucía, que pueden suponer un riesgo para el ser humano y para los ecosistemas aunque aún no presenten un demostrado carácter invasor (no presentan una tendencia demográfica expansiva). Se incluyen citas de “animales salvajes peligrosos” y “animales p...

Beach evening primrose Oenothera drummondii is a perennial plant native to the southern USA and adjacent parts of Mexico that invades coastal habitats in several countries. There are currently no accepted control methods. We conducted a seven-month controlled field trial using the glyphosate herbicide Roundup® Ultra Plus in the Odiel Marsh Nature R...

Abstract: The option of employing non-experienced personnel is sometimes considered for population control management. This implies a double assumption: that there is no interaction between the level of experience and the efficiency of the management and that the skills and field experience can be achieved promptly during the course of the campaign...

Probablemente hayan sido muchos más… En 2016 se cumplen 50 años de la publicación de la “tiranía de las pequeñas decisiones”, por el economista Alfred Khan (1966). Según esta premisa, las grandes decisiones se alcanzan como resultado de la suma de pequeñas decisiones, aparentemente independientes, por parte de individuos o pequeños grupos de indivi...

The presence of the large branchiopod fauna in the Iberian Peninsula and Balearic Islands was recorded obtained from bibliographical and recent captures. The fauna includes 16 anostracans, 7 notostracans and 4 spinicaudatans, although we considered the different species of genus Triops as one taxa, due to the difficulties to allocate the bibliograp...

The presence and prevalence of the parasite Sphaerotecum destruens was evaluated in an invading population of Pseudorasbora parva which was recently detected in the Southern Basin of Spain. For analysis, molecular techniques (double nested PCR) were used. The results were negative in the sample (n = 29 fish), suggesting that either the parasite is...

The province of Cadiz (South of Spain) hosts the only known locality in the world of Linderiella baetica Alonso & García-de-Lomas 2009 (Anostraca). In this paper, the geographical distribution of the species based on published sampling data focused on large branchiopods and temporary pools in Andalusia and the entire Iberian Peninsula is assessed....

Two new localities invaded by Ameiurus melas are reported: Paraje Natural Brazo del Este and Reserva Natural Concertada de la Dehesa de Abajo. Both localities are protected areas in Seville province (SW Spain). Basic information about the species spread is provided. Resumen: Se documentan dos nuevas localidades invadidas por Ameiurus melas (Rafine...

The presence and prevalence of the parasite Sphaerotecum destruens was evaluated in an invasive population of Pseudorasbora parva which was recently detected in the Southern Basin of Spain. For this analysis, molecular techniques (double nested PCR) were used. The results were negative in the sample (n = 29 fish individuals), suggesting that the pa...

[in Spanish, English abstract and captions] Pseudorasbora parva Temminck & Schlegel (Cyprinidae, subfamily Gobioninae), an invasive Asian fish, has been found in the Cuenca Sur (Hozgarganta and Guadiaro rivers) for the first time, as a result of native fauna characterization and early detection works developed by the Environmental Council (Regional...

La onagra costera (Oenothera drummondii Hook.) es una planta nativa de las costas del Sur de Norteamérica y México que forma praderas invasoras sobre hábitats de interés Co-munitario del Paraje Natural Marismas del Odiel (Huelva, S de España). Se evaluó el grado de invasión mediante la elabora-ción de una cartografía georreferenciada de densidad en...

Pseudorasbora parva Temminck & Schlegel (Cyprinidae, subfamily Gobioninae), an invasive Asian fish, has been found in the Cuenca Sur (Hozgarganta and Guadiaro rivers) for the first time thanks to the field works for the assessment of native aquatic fauna and for the early detection of invasive species. These works are being conducting by the Enviro...

This paper reports a new population of Bulinus truncatus (Audouin, 1827) (Gastropoda, Planorbidae) found in the province of Almería (Southeast Spain). B. truncatus is an intermediate host of Schistosoma haematobium, the trematode which causes urinary schistosomiasis in humans. Individuals were identified to species level by PCR, resulting in 100% h...

New locations of M. laevis L, as invasive of arable lands (wheat, olive orchads, etc.) are provided for South of Spain.

Legislation on biological invasions has been evolving in recent decades. The use of lists of harmful alien organisms (hereinafter LHAO) is becoming a widespread policy practice in many countries. LHAO aims to prevent the introduction of undesirable organisms at the pre-border level, regulate their use within the country and deter their spread. Howe...

This paper reports a new population of Bulinus truncatus (Audouin, 1827) (Gastropoda, Planorbidae) found in the province of Almería (Southeast Spain). B. truncatus is an intermediate host of Schistosoma haematobium, the trematode which causes urinary schistosomiasis in humans. Individuals were identified to species level by double-nested PCR, resul...

The first records of Ipomoea imperati (Vahl) Griseb (Convolvulaceae) in the province of Cádiz are documented. This rhizomatous and creeping species is native to North America. I. imperati was found as incipient naturalized populations (between 300-750 m2) on beaches from Barbate and Algeciras municipalities. In both cases, I. imperati colonizes shi...

In this study, the results of management of the ice plant (Carpobrotus spp.) carried out by the Regional Environmental Council of Andalucia on Tarifa Island between 2008-2013 are presented. Aerial photographic analysis showed an exponential increase of the surface area invaded by the ice plant between 1977-2004. This increase posed a serious threat...

Esta publicación expone experiencias y métodos de control de especies vegetales exóticas presentes en el litoral andaluz, realizadas a escala piloto durante el desarrollo del proyecto de cooperación transfronteriza POCTEFEX TRANSHABITAT_ 0087 (Andalucía - Marruecos) de la Unión Europea, dentro de la acción "Desarrollo de técnicas de control de flor...

La presente obra describe un procedimiento de análisis de actuaciones de gestión de poblaciones de especies invasoras que sirve de ayuda a la toma de decisiones. Se trata de un manual de índole técnica destinado a profesionales del sector medioambiental, especialmente gestores y técnicos de la administración pública, así como a gestores de aquellas...

Significance High concentrations of floating plastic debris have been reported in remote areas of the ocean, increasing concern about the accumulation of plastic litter on the ocean surface. Since the introduction of plastic materials in the 1950s, the global production of plastic has increased rapidly and will continue in the coming decades. Howev...

Esta publicación presenta un manual de evaluación del riesgo de invasión de especies vegetales exóticas, desarrollado a través del Programa Andaluz para el Control de las Especies Exóticas Invasoras. Tiene un carácter preventivo, dirigida a evitar la introducción de taxones exóticos invasores, que a posteriori generarían elevados costes para la soc...

1. Gestion des espèces envahissantes : facteurs de la prise de décision 2. Outils disponibles : potentiels et limites 3. Critères recherchés 4. Sélectionner et établir des priorités d’actions dans la gestion des invasions biologiques : fondements et utilisation 4.1 Considérations préalables 4.2 Calcul des coûts 4.3 Système de notation et fondements...

1. Introduction 1.1 Les invasions biologiques : un phénomène croissant nécessitant des stratégies préventives 1.2 Prédire les risques d’invasion : à la recherche de solutions simples pour s’attaquer à un problème complexe 2. L’analyse des risques dans le cadre du Catalogue espagnol des espèces exotiques envahissantes 3. Difficultés, biais et soluti...

1. Introduction et objetifs 2. Tests à échelle pilote : prévenir l'amplification des erreurs 3. Indicateurs utilisés pour évaluer l'adéquation de la méthode 3.1. Comment déterminer l'ampleur des actions en fonction du degré de colonisation 3.2. Ressources nécessaires pour mener une action d'élimination d'espèces exotiques envahissantes 3.3. In...

La presente obra describe un procedimiento de análisis de actuaciones de gestión de poblaciones de especies invasoras que sirve de ayuda a la toma de decisiones. Se trata de un manual de índole técnica destinado a profesionales del sector medioambiental, especialmente gestores y técnicos de la administración pública, así como a gestores de aquellas...

Se analiza el riesgo de invasión asociado a Cylindropuntia pallida. Concluimos que presenta un Riesgo Alto de invasión en España.//This document shows a risk analysis for the alien species Cylindropuntia rosea in Spain. We conclude that, for the most counterpart of Spain, a high risk of invasion is associated to the use of this species.

The increasing number of invasive species and their effects on wildlife conservation, together with a lack of public resources, make it necessary to prioritize management actions. In practice, management decisions are often reached on the basis of subjective reasoning rather than scientific evidence. To develop a more evidence-based and efficient m...

Vernal pools are preferred breeding habitats for numerous amphibian species. The analysis of prey composition during the amphibian larval stages is necessary to understand diet composition and food choice in aquatic communities. We studied the diet of larvae of Pleurodeles waltl when exogenous feeding begins and throughout the flooding period in an...

Colocasia esculenta, or taro, is an emergent aquatic and semi-aquatic plant, native to Asia, which is cultivated for its edible corm in several parts of the world. This species has colonized or invaded wetlands and rivers in different parts of the world (e.g., Southeast USA, Southwestern Australia, Southern Africa, etc.) thus suggesting that early...