Alejandro Bernal-IbáñezMARE - Centro de Ciências do Mar e do Ambiente · Canning-Clode Marine Lab (MARE Madeira)
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Citations since 2017
14 Research Items
PhD Student (Ciências do Mar - University of Lisbon) at MARE-Madeira, currently focused on the assessment and evaluation of human impacts on macroalgal forests in Madeira Archipelago. My main research aim is to understand the complexity of marine systems, mainly benthic communities, their ecological status and the potential effects related to climate change. Searching and promoting collaboration between national and international programs and projects for the study of marine forests.
September 2014 - July 2016
- Internship student
- Internship student during 2 years at Department of Zoology (Biology Marine Laboratory) under surveillance of Dr. Mercedes Conradi. Main task: CO2 effects on Crustacea.
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...
Brown canopy-forming macroalgae species form complex assemblages known as marine forests, which are highly productive systems and provide multiple ecosystem services. In many regions worldwide, these key foundation species are being replaced by generalist species due to numerous underlying impacts acting at local, regional and global scales (i.e. o...
Species of the genera Cystoseira, Ericaria, Gongolaria, and Sargassum (family Sargassaceae) are key components of the Mediterranean-Atlantic marine forests, essential for biodiversity and ecosystem functioning. Populations of these foundational species are particularly vulnerable to anthropogenic impacts, likely to be intensified under future scena...
The current distribution of Pachygrapsus maurus in the Mediterranean Sea is not well known. This species seems to share niches with other species of the same genus, such as Pachygrapsus marmoratus and Pachygrapsus tranversus. We report the presence of P. maurus in Es Vedrà, Es Vedranell and els Illots de Ponent, as first records in Ibiza. Abundance...
Macroalgal forests play a key role in shallow temperate rocky reefs worldwide, supporting communities with high productivity and providing several ecosystem services. Sea urchin grazing has been increasingly influencing spatial and temporal variation in algae distributions and it has become the main cause for the loss of these habitats in many coas...
The global lockdown to mitigate COVID-19 pandemic health risks has altered human interactions with nature. Here, we report immediate impacts of changes in human activities on wildlife and environmental threats during the early lockdown months of 2020, based on 877 qualitative reports and 332 quantitative assessments from 89 different studies. Hundr...
Marine forests ecosystems are typical of temperate rocky benthic areas. These systems are formed by canopy-forming macroalgae (Laminariales, Tilopteridales and Fucales) of high ecological value that provide numerous ecosystem services. These key species are also indicators of good environmental status. In recent decades, marine forests have been th...
The assessment of the European marine environment has made a progress with the implementation of a European legal framework and the adoption of different directives such as the recently Marine Strategy Framework Directive (MSFD; 2008/56/EC). It requires the assessment of the ecological status of the marine fish communities and it pretends to achiev...
Im using R to calculate beta diversity values between pairs of samples. I used to think beta diversity values had 0 as minimum and 1 as maximum, but im getting values higher than 1.
My code in R is the next one:
betadiversity <- betadiver(PRAB, method = "w")
What are the values for B diversity between samples?
Objective 1 (O1) – Patterns. Which is the present ecological status of macroalgal forest from the human impacted coast of Madeira Archipelago? Objective 2 (O2) – Processes. Is this status naturally occurring or is it a degraded status consequence of human threats? Which are the main factors involved in determining the present conservation status? Which are the principal human threats operating here: local vs. global stressors? Objective 3 (O3) – Actions and Restoration. How can we promote or manipulate resident macroalgal communities, through biotic and abiotic interventions, to provide enough input for restoring the ecological degraded coastal systems?