Juan Sempere-ValverdeUniversidad de Sevilla | US · Departamento de Zoología
Juan Sempere-Valverde
MS
About
42
Publications
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252
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Citations since 2017
Introduction
I am doing my PhD in the Department of Zoology of the University of Seville (Spain), under the supervision of Prof. JM Guerra-García. My research interests fall within the fields of Marine Coastal Biology, Ecology, habitats and species Conservation and impacts by NIS. I am currently working on the quantification of the ecological impacts of coastal protection infrastructures and the development of mitigation measures. For more information check my website at https://personal.us.es/jsvalverde
Publications
Publications (42)
Harbours are highly modified habitats that differ from natural areas. They are hotspots of non-indigenous species (NIS) and act as stepping-stones in invasive processes. However, local communities can exert biotic resistance against biological invasions through trophic interactions and competition. This study assesses the biotic effects of predatio...
Coastal zones provide about 70% of the world’s ecosystem services. However, more than 25% of these habitats have been modified by human activity at both land and sea. At the intertidal eco-tonal zone, habitat modification is equally severe, as almost 20% of the world’s shoreline is now artificial. Coastal defense structures are more abundant in are...
Marinas are hubs for non-indigenous species (NIS) and constitute the nodes of a network of highly modified water bodies (HMWB) connected by recreational maritime traffic. Floating structures, such as pontoons, are often the surfaces with higher NIS abundance inside marinas and lead the risk for NIS introduction, establishment and spread. However, t...
The brown macroalgae Rugulopteryx okamurae is described as one of the most severe and threatening invasive marine macroalgae in European waters. This study reports the first record of R. okamurae in the Madeira archipelago, which represents a new southern distribution limit of this species in NE Atlantic European waters. Morphological and molecular...
Marinas are a gateway for the introduction and establishment of non-indigenous species (NIS). In these habitats, competition and predation are crucial determinants for NIS establishment and invasiveness. However, fish trophic preferences and biotic effects inside marinas are poorly known. This study proposes a novel method that combines the deploym...
During the Anthropocene, species are becoming extinct at unprecedented rates, a trend that will be difficult to reverse, even if we ignore the possibility of a considerable extinction debt. Among the different factors that affect the natural environment, fragmentation of ecosystems by urbanization processes can cause a reduction in species populati...
Este vídeo didáctico sobre taxonomía permite observar los colores y morfología de los equinodermos en su hábitat marino natural. El recurso complementa las prácticas de la asignatura de Zoología e incluye información útil para la identificación de especies representativas de las diferentes Clases del Filo Echinodermata: Asteroidea, Ophiuroidea, Cri...
Intertidal ecosystems are key habitats that are being replaced by artificial hard substrates due to the increment of human activities in coastal areas. These new substrates host generally less biodiversity mainly due to differences in complexity and composition. It is a global phenomenon and has led to the development of strategies in the framework...
• This work constitutes the first comprehensive study of the epifaunal response to biological invasions in coralligenous habitats, which are one of the main hotspots of biodiversity in the Mediterranean.
• The epifaunal community inhabiting the invasive macroalga Rugulopteryx okamurae and other dominant sessile hosts on coralligenous habitats (i.e....
The present study constitutes the first evaluation of the space colonization strategies performed by Rugulopteryx okamurae when co-occurring with the resident macroalgal community in the introduced areas. Since the first apparition of the nonindigenous macroalga in the Strait of Gibraltar, its high propagation capacity together with its colonizatio...
This is the first investigation of the potential for using Cymodocea nodosa to biomonitor trace element (TE) contamination in Marchica lagoon (Morocco), a Mediterranean pollution hotspot. We measured concentrations of seven TEs in seagrass tissues (leaf-rhizome-root) and sediments. Single and multi-element indices confirmed that sediments near ille...
The Mediterranean is one of the most biodiverse and anthropogenically impacted seas and the coralligenous is one of its most diverse habitats. Its presence is indicative of well-preserved areas and its associated species are considered among the best bioindicators for monitoring nearshore rocky habitats. This study aims to report the temporal fluct...
Link: https://www.youtube.com/watch?v=TZ_utvRBRPY&t=25s
This video is licensed under a Creative Commons CC-BY-NC-ND 4.0
The Mediterranean Sea is a marine biodiversity hotspot under threat. One of the major impacts on its biological resources and services comes from the invasiveness of non-indigenous species (NIS). Nevertheless, NIS monitoring programs in the south basin of the Mediterranean Sea are in an early implementation stage. This study aims to describe NIS an...
In 2015, the exotic seaweed Rugulopteryx okamurae was detected for the first time on the south side of the Strait of Gibraltar, in Ceuta (northern Africa). This highly sensitive area is ideal for monitoring local environmental impacts arising from global warming, as well as the intrusion of alien species. Within one year, R. okamurae became an inva...
Marine protected areas (MPAs) are considered a useful tool for marine biodiversity and ecosystems conservation and management.
Nevertheless, concern has arisen about the negative effects experienced on marine reserves with low levels of protection. In terms of fish
conservation, small MPAs cannot provide effective protection for highly mobile spe...
Artificial structures introduced into the marine environment are known for being a risk to local biodiversity. However, it is not rare to find endangered species established in these anthropogenic habitats, as it is the case of the limpets Cymbula safiana and Patella ferruginea, whose populations are numerous on coastal protection structures of sou...
The effectiveness of monitoring programs in the marine environment is often limited by the scarcity of information concerning medium/long-term time series observations (years-decades) in complex and variable systems. Marine submerged caves, in particular, have received relatively low research effort, as they are confined and difficult to access eco...
Limpets are one of the most important herbivorous grazers of temperate rocky
shores, promoting diversity and influencing the structure and functioning of intertidal
communities. In the current context of global change, harvesting pressures on accessible
intertidal and habitat modifications caused by coastal urbanization are threatening these
organi...
The non-indigenous brown algae Rugulopteryx okamurae (Dictyotales, Ochrophyta) has expanded since year 2015 on lit hard-bottoms of the Strait of Gibraltar. It has produced serious impacts over the indigenous benthic communities, frequent hooks on fishing nets and lines and the accumulation of thousands of tons of seaweed in nearby beaches and wrack...
Submarine caves are considered priority habitats according to the Barcelona Convention and the EU Habitat Directive, yet they have received relatively low research effort when compared to other Mediterranean coastal habitats. This paper provides information about the long-term spatio-temporal observations of sessile benthos along the exterior-inter...
The Strait of Gibraltar is considered as a vulnerable biodiversity ‘hot spot’. In the marine area of Jbel Moussa, between Belyounech Bay and Tanger-Med harbour, an important shallow population of the red coral (Corallium rubrum) was reported in 2014. In 2015, 9 monitoring stations were placed within 3 sites to assess the degree of variation of the...
La Lapa ferrugínea (Patella ferruginea) es una especie incluida en el Catálogo Español de Especies Amenazadas (Ley 42/2007) con la categoría de “en peligro de extinción". Con la finalidad de promover e impulsar las acciones necesarias para eliminar el peligro de extinción al que se enfrenta la especie, el 30 de mayo de 2008 se aprueba la Estrategia...
The Mediterranean ribbed limpet Patella ferruginea Gmelin, 1791 is the most endangered marine invertebrate listed in the EU Habitats Directive. A diversity of anthropic pressures have reduced its present-day distribution to a fraction of its former size. Perhaps surprisingly, this highly protected species has successfully established along man-made...
The Mediterranean Ribbed Limpet Patella ferruginea Gmelin, 1791 is the most endangered marine invertebrate listed in the EU Habitats Directive. The main populations of this species are located at Ceuta, Melilla, Chafarinas, Habibas and Zembra Islands. This work briefly describes the ongoing research activities on this species by the Laboratory of M...
Exotic species Rugulopteryx okamurae has expanded massively on subtidal illuminated marine hard-bottoms within the strait of Gibraltar in the past two years, producing serious impacts over the benthic communities previously established, accumulation of hundreds of tons of seaweed in nearby beaches and wrack zones and hooks on fishing nets. In this...
https://sciencetrends.com/sustainable-coastal-development-should-we-care-about-surface-materials/
Coastal urbanization is often accompanied by the replacement of natural substrata by artificial structures, which causes coastal habitat modifications, losses of species richness, diversity and microhabitats diversity and favours the settlement of non-native species. The impact that coastal defence structures cause in the intertidal community is fu...
There are more than 27,000 harbours along coasts worldwide and construction is expected to increase. The development and application of new ecological engineering ideas, for both old and new structures, is now imperative in order to reduce perturbation on marine coastal biota and to avoid the spread of non-native species. In this study, the early b...
It has been shown that the urbanization and construction of commercial structures on coasts causes a significant impact on natural marine ecosystems. However, mitigation of these effects is still a field of study on which there is little information. In this sense, the relatively novel concept of “Ecological Engineering” integrates ecology, economy...
Nowadays, more than 27 thousand harbours encompass coasts all over the world and construction is expected to be increased in the future. The development and apply of new ecological engineering ideas over both old and new structures is now imperative in order to reduce perturbation on marine coastal biota and to avoid the spread of non-native specie...
Projects
Projects (3)
Limpets are one of the most important herbivorous grazers of temperate rocky shores. They promote diversity and influence the structure and functioning of intertidal communities. In the current context of global change, harvesting pressures on accessible intertidal and habitat modifications caused by coastal urbanization are threatening these organisms in many coastal areas.
The development and application of new ecological engineering ideas for both old and new structures is now imperative in order to reduce perturbation on marine coastal biota and to avoid the spread of non-native species.
