26 documents found, page 1 of 3
Record of the first Pleonexes species (Crustacea: Amphipoda: Ampithoidae) in Mo...
Kaid, Soukaina; Chaouti, Abdellatif; Mateus, M.; Belattmania, Zahira; Serrao, Ester; Engelen, Aschwin H.; Reani, Abdeltif; Sabour, BrahimThe ampithoid amphipod crustacean Pleonexes gammaroides Spence Bate, 1857 is reported from Morocco (northeastern Atlantic Ocean) for the first time, where it is the only representative of the genus Pleonexes Spence Bate, 1857 so far. Specimens were collected from the upper fringe of the infralittoral zone (including low intertidal) of El Jadida coastline associated with the holdfasts of the kelp Saccorhiza poly...
Climate Change Impacts on Seagrass Meadows and Macroalgal Forests: An Integrati...
Duarte, Bernardo; Martins, Irene Isabel da Cruz; Rosa, Rui; Matos, Ana R.; Roleda, Michael Y.; Reusch, Thorsten B. H.; Engelen, Aschwin H.Marine macrophytes are the foundation of algal forests and seagrass meadows–some of the most productive and diverse coastal marine ecosystems on the planet. These ecosystems provide nursery grounds and food for fish and invertebrates, coastline protection from erosion, carbon sequestration, and nutrient fixation. For marine macrophytes, temperature is generally the most important range limiting factor, and ocea...
Climate Change Impacts on Seagrass Meadows and Macroalgal Forests: An Integrati...
Duarte, Bernardo; Martins, Irene; Rosa, Rui; Matos, Ana R.; Roleda, Michael Y.; Reusch, Thorsten B. H.; Engelen, Aschwin H.; Serrão, Ester A.Marine macrophytes are the foundation of algal forests and seagrass meadows–some of the most productive and diverse coastal marine ecosystems on the planet. These ecosystems provide nursery grounds and food for fish and invertebrates, coastline protection from erosion, carbon sequestration, and nutrient fixation. For marine macrophytes, temperature is generally the most important range limiting factor, and ocea...
Haploid females in the isomorphic biphasic life-cycle of Gracilaria chilensis e...
Vieira, Vasco M. N. C. S.; Engelen, Aschwin H.; Huanel, Oscar R.; Guillemin, Marie-LaureBackground Conditional differentiation is one of the most fundamental drivers of biodiversity. Competitive entities (usually species) differ in environmental or ecological niche enabling them to co-exist. Conditional differentiation of haploid and diploid generations is considered to be a requirement for the evolutionary stability of isomorphic biphasic life-cycles and the cause for the natural occurrence of bo...
Acidification increases abundances of Vibrionales and Planctomycetia associated...
Aires, Tânia; Serebryakova, Alexandra; Viard, Frederique; Serrao, Ester A.; Engelen, Aschwin H.Ocean acidification significantly affects marine organisms in several ways, with complex interactions. Seaweeds might benefit from rising CO2 through increased photosynthesis and carbon acquisition, with subsequent higher growth rates. However, changes in seaweed chemistry due to increased CO2 may change the nutritional quality of tissue for grazers. In addition, organisms live in close association with a diver...
Latitude, temperature, and habitat complexity predict predation pressure in eel...
Reynolds, Pamela L.; Stachowicz, John J.; Hovel, Kevin; Bostrom, Christoffer; Boyer, Katharyn; Cusson, Mathieu; Eklof, Johan S.; Engel, Friederike G.Latitudinal gradients in species interactions are widely cited as potential causes or consequences of global patterns of biodiversity. However, mechanistic studies documenting changes in interactions across broad geographic ranges are limited. We surveyed predation intensity on common prey (live amphipods and gastropods) in communities of eelgrass (Zostera marina) at 48 sites across its Northern Hemisphere rang...
Genetic and oceanographic tools reveal high population connectivity and diversi...
Wesselmann, Marlene; Gonzalez-Wanguemert, Mercedes; Serrao, Ester A.; Engelen, Aschwin H.; Renault, Lionel; Garcia-March, Jose R.; Duarte, Carlos M.For marine meta-populations with source-sink dynamics knowledge about genetic connectivity is important to conserve biodiversity and design marine protected areas (MPAs). We evaluate connectivity of a Mediterranean sessile species, Pinna nobilis. To address a large geographical scale, partial sequences of cytochrome oxidase I (COI, 590 bp) were used to evaluate phylogeographical patterns in the Western Mediterr...
Marine forests of the Mediterranean-Atlantic Cystoseira tamariscifolia complex ...
Bermejo, Ricardo; Chefaoui, Rosa M.; Engelen, Aschwin H.; Buonomo, Roberto; Neiva, J.; Ferreira-Costa, Joana; Pearson, Gareth; Marba, NuriaClimate-driven range-shifts create evolutionary opportunities for allopatric divergence and subsequent contact, leading to genetic structuration and hybrid zones. We investigate how these processes influenced the evolution of a complex of three closely related Cystoseira spp., which are a key component of the Mediterranean-Atlantic seaweed forests that are undergoing population declines. The C. tamariscifolia c...
Interactions between seagrasses and seaweeds during surge nitrogen acquisition ...
Alexandre, Ana; Baeta, Alexandra; Engelen, Aschwin H.; Santos, RuiSeagrasses dominate shallow coastal environments where nitrogen (N) availability in the water column is often sporadic and mainly in the form of pulses. We investigated the N uptake competition between seagrasses and seaweeds through a series of 15N surge uptake experiments combining single-species and mixed incubations across ammonium concentrations. N surge uptake rates of seagrasses were 2 to 14-fold higher ...
Habitat continuity and stepping-stone oceanographic distances explain populatio...
Buonomo, Roberto; Assis, J.; Fernandes, Francisco; Engelen, Aschwin H.; Airoldi, Laura; Serrao, Ester A.Effective predictive and management approaches for species occurring in a metapopulation structure require good understanding of interpopulation connectivity. In this study, we ask whether population genetic structure of marine species with fragmented distributions can be predicted by stepping-stone oceanographic transport and habitat continuity, using as model an ecosystem-structuring brown alga, Cystoseira am...