Andrés Millán

Andrés Millán
University of Murcia | UM · Department of Ecology and Hydrology

Professor (Full)
Mediterranean water beetles and bugs: ecology, biogeography, conservation. Saline aquatic ecosystems. Biotic indicators

About

244
Publications
67,842
Reads
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4,794
Citations
Citations since 2017
66 Research Items
2412 Citations
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20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500
Introduction
Research interests: (1) Taxonomy, ecology and biogeography of water beetles and bugs in Mediterranean ecosystems; (2) Conservation of insects and aquatic ecosystems; (3) Ecology of saline rivers: composition and structure of macroinvertebrate community, primary production, secondary production, trophic interactions; and (4) Biomonitoring: biotic indicators of aquatic ecosystems. (5) Responses of organisms living in extreme ecosystems: marine rock pools, high mountain ponds, caves.
Additional affiliations
January 2010 - present
University of Murcia
Position
  • Atlas of Iberian water beetles
Description
  • working on ecology, biogeography and conservation of water beetles and their habitats, especially aquatic saline ecosystems
September 1991 - August 1992
Arizona State University
Position
  • PostDoc Position
Description
  • Posdoctoral fellowship: characterization of macroinvertebrate community and responses to flash flood disturbances in semiarid streams
January 1989 - December 2012
University of Murcia
Description
  • Ecology, Limnology and Entomology teacher

Publications

Publications (244)
Article
Determining the saline niche of the congeneric and co‐existing species that inhabit supralittoral rockpools subjected to extremely fluctuating saline conditions is a crucial concern to understand their spatial distributions and occurrence, and to predict their ability to face increasing environmental instability due to climate change. Therefore, we...
Article
Full-text available
We have compiled all available information regarding the presenceof Ochthebius species in supratidal rockpools in the western Palaearctic,distinguishing species typical of these habitats from those whose presen-ce is occasional. Overall, there are 32 taxa (30 species and 3 subspecies)linked with coastal habitats, 21 of them restricted to supratidal...
Article
Full-text available
The immune response represents a suite of evolved traits that can involve energetic and evolutionary trade‐offs with other energy‐demanding and fitness‐related processes. Here, we tested the hypothesis that aquatic beetles living in inland hypersaline habitats have lower immune capacity than freshwater congeners. Phenoloxidase activity, encapsulati...
Presentation
Full-text available
The supralittoral rockpools, on the land and sea ecotone, are highly dynamic habitats with extreme conditions. The few and exclusive species living there are subjected to multiple stressors (i.e., salinity, temperature, desiccation). Among them, several species of the genus Ochthebius (Coleoptera: Hydraenidae) are frequently cooccurring. Whether fu...
Article
Full-text available
The conservation of freshwater biodiversity is one of the main challenges for this century, especially in Mediterranean ecosystems. This study aims to improve the knowledge on the aquatic macroinvertebrates of the Sierra Espuña Regional Park, one of the protected spaces of higher interest in the Iberian southeast. Through field sampling and bibliog...
Article
Morphologically cryptic lineages confound many estimates of global biodiversity and are often discovered in ecologically specialized taxa, subject to strong morphological constraint. Such a situation may apply in many extreme environments, including supralittoral rockpools, where dramatic fluctuations in water availability and salinity impose stron...
Article
Morphologically cryptic lineages confound many estimates of global biodiversity and are often discovered in ecologically specialized taxa, subject to strong morphological constraint. Such a situation may apply in many extreme environments, including supralittoral rockpools, where dramatic fluctuations in water availability and salinity impose stron...
Article
ABSTRACT This work presents an updated list of water beetles of the Elmidae and Dryopidae occurring in Morocco. The study is based on an exhaustive review of literature (1914–2021) complemented with field and laboratory investigations on more than 2200 collected individuals between 1997 and 2019. As a result, 30 species belonging to nine genera of...
Article
Several field surveys at 391 freshwater localities between 1985 and 2019 were undertaken in Morocco. Altogether, our field studies identified 67 species belonging to three genera (Hydraena, Limnebius, and Ochthebius), and representing 85.89% of the Hydraenidae fauna of the country. The species Hydraena exarata Kiesenwetter, 1866 is reported for the...
Article
Full-text available
Coping with aridity is a physiological challenge for all organisms, including freshwater ones. Aridity shapes distributions of aquatic species at fine and large geographical scales. Specifically, for aquatic beetles, the desiccation resistance of the adults is a potential constraint for the colonisation of arid regions. We assessed the congruence b...
Article
• Evaluating data quality and inventory completeness must be a preliminary step in any biodiversity research, particularly in the case of insects and high biodiversity areas. Yet, this step is often neglected or, at best, assessed only for one insect group, and the degree of congruence of sampling effort ffor different insect groups remains unexplo...
Article
In the context of global change, it is important to know species’ physiological limits and their behavioural responses to environmental changes, especially those living in extreme environments like rockpools. Our main study objective was to determine the thermal tolerance of three beetle species (Ochthebius quadricollis, O. subinteger, O. lejolisi...
Article
Full-text available
The alien aquatic hemipteran Trichocorixa verticalis verticalis (Corixidae), has been found in Región de Murcia (Spain) for the first time. An isolated male was detected in a small supratidal rockpool at Cala Reona (Cabo de Palos, Cartagena).
Article
Full-text available
Rivers are dynamic ecosystems in which both human impacts and climate‐driven drying events are increasingly common. These anthropogenic and natural stressors interact to influence the biodiversity and functioning of river ecosystems. Disentangling ecological responses to these interacting stressors is necessary to guide management actions that supp...
Presentation
Full-text available
GARCÍA-MESEGUER AJ, MIRÓN-GATÓN JM, BOTELLA-CRUZ M, MILLÁN A, & VELASCO J. Environmental variables influencing abundance of two congeneric water beetles species from supratidal rockpools. 14th International Conference Of The ISSRL (International Society Of Salt Lake Research) (18-22 October 2021, Murcia, Spain): Supratidal rockpools are singular a...
Article
Full-text available
Aquatic Hemiptera are barely used as "indicators" because they are considered ubiquitous organisms of great dispersal capacity and a wide range of occupied habitats. Here, we address this topic analyzing the environmental factors determining the distribution of the species found in a northeastern Moroccan basin with a strong altitudinal gradient, a...
Article
This checklist summarises our present knowledge on Moroccan distribution of the water beetles of five families: Gyrinidae, Haliplidae, Noteridae, Hygrobiidae and Dytiscidae. It includes all available faunistic data based on material collected by the authors and from the private collections, as well as from the literature, PhD theses, and other unpu...
Article
Full-text available
The study of the genetic makeup and demographic fate of alien species is essential to understand their capacity to recover from founder effects, adapt to new environmental conditions and, ultimately, become invasive and potentially damaging. Here, we employ genomic data to gain insights into key demographic processes that might help to explain the...
Article
Full-text available
Biodiversity loss is exceptionally greater in freshwater ecosystems. To preserve such biodiversity it is crucial to know what species and habitats require greater conservation efforts. In this study, we identify the most threatened endemic sensu lato water beetles found in Morocco (i.e., Moroccan, Maghrebian and Ibero-Maghrebian endemics) using six...
Article
Full-text available
In the context of aridification in Mediterranean regions, desiccation resistance and physiological plasticity will be key traits for the persistence of aquatic insects exposed to increasing desiccation stress. Control of cuticular transpiration through changes in the quantity and composition of epicuticular hydrocarbons (CHCs) is one of the main me...
Article
Full-text available
A checklist of water scavenger beetles from Morocco and their distribution in the country and North Africa is presented. It is based on (1) an exhaustive review of the literature (time span: 1914–2018); (2) more than 3150 individuals collected during extensive campaigns (2003–2018); and (3) an intensive revision of private collections. We found 52...
Article
Full-text available
Dispersal is an essential process in population and community dynamics, but is difficult to measure in the field. In freshwater ecosystems, information on biological traits related to organisms' morphology, life history and behaviour provides useful dispersal proxies, but information remains scattered or unpublished for many taxa. We compiled infor...
Article
Full-text available
We describe four species of Ochthebius subgenus Cobalius (Coleoptera, Hydraenidae) from coastal rockpools of the western Palaearctic Region: O. anzar sp. nov. (south Morocco, plus a possible specimen from Lanzarote, Canary Islands), O. cortomaltese sp. nov. (Malta), O. evae sp. nov. (Atlantic coast of Morocco and Mediterranean coast of south Spain)...
Presentation
Full-text available
GARCÍA-MESEGUER AJ, SÁNCHEZ-FERNÁNDEZ D, MILLÁN A, ESTEVE MA & ROBLEDANO F. Biogeography and conservation of terrestrial and aquatic molluscs in a semiarid Mediterranean region. XX Congress of Iberian Association of Limnology (AIL-2020) & III Iberoamerican Congress of Limnology (CIL-2020) (26-29 October 2020, Murcia, Spain): The aquatic ecosystems...
Article
Physiological traits are key in determining the vulnerability of narrow range, highly specialized animals to climate change. It is generally predicted that species from more stable environments possess lower thermal tolerance breadths and thermal plasticity than those from more variable habitats-the so-called 'climatic variability hypothesis'. Howe...
Article
Full-text available
Melloulou River, which is located in Middle Atlas of Morocco, is a good example of a very wet and poorly known basin, and therefore of special conservation concern. The aim of this study was to draw up an initial inventory of the benthic macroinvertebrates taxa, and to analyze its longitudinal distribution in the basin, particularly searching for t...
Article
Full-text available
En recuerdo de Ignacio Ribera (1963-2020) In memory of Ignacio Ribera (1963-2020) "Ya no importa cuán estrecha sea la puerta, cuán cargada de castigos la sentencia, soy el amo de mi destino: soy el capitán de mi alma" William Ernest Henley (Invictus, 1888). Este poema expresa, con demasiada épica para lo que a él le gustaría, la determinación en l...
Article
Full-text available
In memoriam to Ignacio Ribera (1963-2020)L
Preprint
Full-text available
Motivation: Dispersal is an essential process in population and community dynamics but is difficult to measure in the field. In freshwater systems, relevant information on the dispersal of many taxa remains scattered or unpublished, and biological traits related to organisms morphology, life history and behaviour offer useful dispersal proxies. We...
Article
Full-text available
The alien boatman Trichocorixa verticalis verticalis (Hemiptera: Corixidae) is expanding in Morocco This paper updates the presence of the Nearctic "water boatman" Trichocorixa verticalis verticalis in North Africa, showing a new range of the alien species that strongly have increased its distribution area in Morocco since its first record in 2010....
Article
Full-text available
Invasive species are among the top five causes of biodiversity loss worldwide. Arundo donax has progressively colonized the riparian zones of Mediterranean rivers with detrimental effects on terrestrial and aquatic biodiversity, being catalogued as one of the 100 worst invasive species. In order to control this invasive species and restore native r...
Article
Accurate assessments of species' vulnerability to climate change require integrated measurements of its different drivers, including extrinsic (the magnitude and rate of climate change) and intrinsic factors (organisms' sensitivity and adaptive capacity). According to these factors, aquatic insects restricted to alpine ponds may be especially threa...
Poster
Full-text available
Desiccation resistance is critical to the survival of the insect species of supralitoral rockpools, subjected to short hydroperiod and strong variation of water temperature and salinity. These environments are inhabited by some specialized groups of aquatic beetles, all belonging to the genus Ochthebius (Family Hydraenidae), as O. quadricollis and...
Article
Salinity tolerance has enabled the colonization of inland saline waters and promoted species diversification in some lineages of aquatic insects. However, the mechanisms behind this tolerance, particularly the role of cuticle hydrocarbons (CHCs), are not well-known. We characterized the CHC profile of eight species of two water beetle genera (Nebri...
Article
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...
Poster
Full-text available
TS.07-P-4. External pavilion, Poster session 2: Wednesday 6th - Thursday 7 th Feb. Page 188 Book of Abstracts – 1st Iberian Ecological Society & XIV AEET Meeting (Spain). Book of abstract. Doi.: 10.7818/SIBECOLandAEETmeeting.2019. http://www.aeet.org/mm/file/Abstract%20Book%20SIBECOL2019.pdf
Article
Under global change, the ion concentration of aquatic ecosystems is changing worldwide. Many freshwater ecosystems are being salinized by anthropogenic salt inputs, whereas many naturally saline ones are being diluted by agricultural drainages. This occurs concomitantly with changes in other stressors, which can result in additive, antagonistic or...
Article
Abiotic stress shapes how communities assemble and support ecological functions. However, it remains unclear whether artificially increasing or decreasing stress levels would lead to communities assembling predictably along a single axis of variation or along multiple context-dependent trajectories of change. In response to stress intensity alterat...
Article
Considering how organisms adapt to stress is essential if we are to anticipate biological responses to global change in ecosystems. Communities in stressful environments can potentially be assembled by specialists (i.e. species that only occur in a limited range of environmental conditions) and/or generalist species with wider environmental toleran...
Article
Naturally stressed ecosystems hold a unique fraction of biodiversity. However, they have been largely ignored in biomonitoring and conservation programmes, such as the EU Water Framework Directive, while global change pressures are threatening their singular values. Herewe present a framework to classify and evaluate the ecological quality of natur...
Article
Full-text available
The first data on the diversity of the aquatic Coleoptera and Hemiptera of the Imlily sebkha are presented. Imlily is a relict Saharan wetland belonging to the Dakhla-Oued Ed Dahab region. Eight species of Coleoptera and two species of Hemiptera are reported. One of the most important faunistic results is the discovery, not only for Morocco, but al...
Conference Paper
Full-text available
One of the main challenges in disciplines such as ecology, biogeography, conservation and evolutionary biology is to understand and predict how species will respond to environmental changes, especially within a climate change context. We focus on the deep subterranean environment to minimize uncertainties in predictions, because it is one of the fe...
Article
Full-text available
We present old and new faunistic and distributional data on aquatic Polyphaga (Coleoptera) from the east of Morocco, comprising the Oriental Region and the basin of Moulouya River. A checklist of 91 species belonging to 27 genera and seven families is provided. Ochthebius quadrifossu-latus (Hydraenidae) and Pomatinus substriatus (Dryopidae) are new...
Conference Paper
Full-text available
Thermal tolerance is a key vulnerability factor for species that cannot cope with changing conditions by behavioural adjustments or dispersal, such as subterranean species. Previous studies of thermal tolerance in cave beetles suggest that these species may have lost some of the thermoregulatory mechanisms common in temperate insects, and appear to...
Conference Paper
Evolutionary novelties may influence the diversification of new lineages, allowing species to colonize new habitats or to exploit new resources. One of the most remarkable traits in primarily freshwater organisms is the possibility to tolerate saline or hypersaline habitats. Recent work in some water beetle families (Hydrophilidae and Dytiscidae) h...
Article
New faunistic and distributional data on aquatic Hemiptera from the Oriental Region of Morocco and the Moulouya River basin, covering an area of 119,268 km2, are presented. An annotated list of 45 species, 21 genera and 11 families is provided. Nine species are new records for the entire studied area, and two for the Moulouya River basin. We redisc...
Article
Biodiversity databases are typically incomplete and biased. We identify their three main limitations for characterizing the geographic distributions of species: unknown levels of survey effort, unknown absences of a species from a region, and unknown level of repeated occurrence of a species in different samples collected at the same location. Thes...
Article
Full-text available
Resumen: Se aportan datos sobre los coleópteros y hemípteros acuáticos del Parque Natural de l'Albufera de Valencia. El estudio se ha realizado en un entorno restaurado y protegido, donde ambos órdenes suelen ser dominantes, aportando, junto con dípteros, la mayor riqueza de especies y abundancia de organismos dentro de los insectos. Entre 2004 y...
Article
Full-text available
RESUMEN: Este artículo presenta el proyecto de investigación CAVEheAT (cambio climático, nicho térmico y conservación de la biodiversidad subterránea). El objetivo del proyecto es estudiar el nicho térmico (rango de tolerancia térmica y capacidad de aclimatación) de especies (principalmente coleópteros) con diferentes grados de especialización al m...
Article
Full-text available
One of the main challenges in ecology, biogeography and evolution is to understand and predict how species may respond to environmental changes. Here we focus on the deep subterranean environment, a system that minimizes most of the typical uncertainties of studies on epigean (surface) environments. Caves are relatively homogeneous habitats with ne...
Article
Some species of the diving beetle tribe Hygrotini (subfamily Hydroporinae) are among the few insects able to tolerate saline concentrations more than twice that of seawater. However, the phylogenetic relationships of the species of Hygrotini, and the origin and evolution of tolerance to salinity in this lineage, are unknown. In this work, we aim to...
Article
Full-text available
Distribution of aquatic beetles from the east of Morocco (Coleoptera, Polyphaga). We present old and new faunistic and distributional data on aquatic Polyphaga (Coleoptera) from the east of Morocco, comprising the Oriental Region and the basin of Moulouya River. A checklist of 91 species belonging to 27 genera and seven families is provided. Ochthe...
Article
Full-text available
Twenty years ago, Keith Miller, David Bilton and Hans Fery (1997) published a checklist of Hydradephaga from Cyprus. There have been no updates since then, and there are also no recent checklists of other families of water beetles from the island. In April 2016 AV, IR, JV & AM conducted a six-day collecting trip to Greek Cyprus, focussing on saline...
Article
Full-text available
The tribe Hygrotini Portevin, 1929 is currently composed of four genera, Heroceras Guignot, 1950, Herophydrus Sharp, 1880, Hygrotus Stephens, 1828 (with two subgenera, Coelambus Thomson, 1860, and Hygrotus s. str.), and Hyphoporus Sharp, 1880. A recent molecular phylogeny of the tribe with ca. 45% of the 137 described species of Hygrotini, includin...
Article
Macroinvertebrate samples collected during spring-summer 2013 in high mountain rivers of the Ordesa and Monte Perdido National Park (Pyrenees) contained several Hydraena species (Coleoptera: Hydraenidae) where we found two genera of suctorian ciliates as epibionts: Tokophrya and Discophrya. The individuals of the genus Tokophrya probably belong to...
Article
Transitions from fresh to saline habitats are restricted to a handful of insect lineages, since the colonization of saline waters requires specialized mechanisms to deal with osmotic stress. Previous studies have suggested that tolerance to salinity and desiccation could be mechanistically and evolutionarily linked, but the temporal sequence of the...
Article
Full-text available
New faunistic and distributional data on aquatic beetles (Adephaga: Gyrinidae, Haliplidae and Dytiscidae) from the Oriental Region of Morocco and the basin of Moulouya River are presented. A check-list of 55 species of three families and 25 genera is provided. Eight species are new records for the basin of Moulouya River and nine species for the Or...
Article
Full-text available
Hydrocarbons are the principal component of insect cuticle and play an important role in maintaining water balance. Cuticular impermeability could be an adaptative response to salinity and desiccation in aquatic insects; however, cuticular hydrocarbons have been poorly explored in this group and there are no previous data on saline species. We char...
Data
Total, absolute (ng/specimen) and relative abundance (%) of the cuticular hydrocarbons (CHCs) identified by GC/MS in the two studied species, for each life stage KI, Kovat index; n, number of larvae, males and females of the total analyzed where the compound is present.
Preprint
Full-text available
Hydrocarbons are the principal component of insects cuticle and play an important role in maintaining water balance. Cuticular impermeability could be an adaptative response to salinity and desiccation in aquatic insects; however, cuticular hydrocarbons have been poorly explored in this group and there are no previous data on saline species. We cha...
Preprint
Full-text available
Hydrocarbons are the principal component of insects cuticle and play an important role in maintaining water balance. Cuticular impermeability could be an adaptative response to salinity and desiccation in aquatic insects; however, cuticular hydrocarbons have been poorly explored in this group and there are no previous data on saline species. We cha...
Article
Full-text available
Biological invasions have become one of the most important drivers of biodiversity loss and ecosystem change worldwide. However, it is still unclear how invasions may interact with local abiotic stressors, which are expected to increase as global change intensifies. Furthermore, we know little about the response to biological invasions of insects,...
Article
Exposing organims to a particular stressor may enhance tolerance to a subsequent stress, when protective mechanisms against both stressors are shared. Such cross-tolerance is a common adaptive response in dynamic multivariate environments and often indicates potential co-evolution of stress traits. Many aquatic insects in inland saline waters from...
Article
Full-text available
The first data on the diversity of the aquatic Coleoptera and Hemiptera of the Imlily sebkha are presented. Imlily is a relict Saharan wetland belonging to the Dakhla-Oued Ed Dahab region. Eight species of Coleoptera and two species of Hemiptera are reported. One of the most important faunistic results is the discovery, not only for Morocco, but al...
Chapter
Full-text available
The authors revise some of the main areas of insect conservation in the context of the global climate change, such as the identification of the main drivers of insect species vulnerability, and also the role of protected areas to preserve insect diversity in future. From the discussion of some of the recent bibliography, some landmarks are identifi...
Article
Ongoing climate change is driving dramatic range shifts in diverse taxa worldwide, and species responses to global change are likely to be determined largely by population responses at geographical range margins. Here we investigate the metabolic and reproductive plasticity in response to water temperature and salinity variation of two populations...
Article
This paper provides the description of a new species of Aphelocheirus (Hemiptera: Heteroptera: Aphelocheiridae), Aphelocheirus pemae sp. nov. from Morocco. The species was found in two sites located in different basins (Sebou and Moulouya rivers) that are separated by approximately 400 km. Photographs of the dorsal habitus of the female and illustr...
Conference Paper
Full-text available
Understanding the origin and evolution of novel traits is one of the unknowns on which evolut ionary biologist work. These traits may influence the origin and diversification of new lineages, and some of them may also facilitate the transition between different habitat types. Focusing on the aquatic environment, important transitions occurred betwe...