Laurene PecuchetUiT The Arctic University of Norway · Norwegian College of Fishery Science
Laurene Pecuchet
PhD in Marine Ecology
About
41
Publications
13,230
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Introduction
I am an associate professor at the Arctic University of Norway (UiT), Tromsø.
I am studying the impacts of global change on marine ecosystems, from fish populations to food web by combining empirical analysis of scientific surveys and modelling tools.
Publications
Publications (41)
Aim
We assessed temporal trends in functional diversity of the deep‐sea demersal fish communities of East Greenland to characterize ecological responses to rising sea temperatures.
Location
The study region encompasses a shelf and slope area located offshore between 63°N and 66°N, east of Greenland.
Methods
A unique dataset of demersal fish abund...
Aim
Assess the spatial and temporal turnover of bentho‐demersal marine fauna by integrating ecological metrics at the community and food web levels and evaluate their main environmental and anthropogenic drivers.
Location
Barents Sea.
Method
We analysed data of benthic and bentho‐pelagic fish and megabenthic invertebrates caught in the Barents Se...
The biogeographic transition from boreal to Arctic marine communities entails a strong taxonomic and functional turnover. Communities living in these areas are being strongly affected by climate warming with rapid reorganizations and change in ecosystem functioning. We assess the megabenthic species composition and functional character in a transit...
The warming trend of the Arctic is punctuated by several record‐breaking warm years with very low sea‐ice concentrations. The nature and reversibility of marine ecosystem responses to these multiple extreme climatic events (ECEs) are poorly understood. Here, we investigate the ecological signatures of three successive bottom temperature maxima conc...
Management targets for biodiversity preservation are shifting from individual species to an ecosystem-wide focus. Indeed, the perturbation analysis of interaction networks, such as food webs, better captures the response of biodiversity to environmental pressures than single-species considerations. Here we propose a framework that examines food web...
Studying how food web structure and function varies through time represents an opportunity to better comprehend and anticipate ecosystem changes. Yet, temporal studies of highly resolved food web structure are scarce. With few exceptions, most temporal food web studies are either too simplified, preventing a detailed assessment of structural proper...
The analysis of the dynamics of interaction networks (i.e. trophic webs) better capture the state of ecosystem facing a perturbation than individual species dynamics could. We propose a framework that examines network robustness to a given perturbation at the local (species), mesoscale (species directly linked together) and global (network) level,...
Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations,
lack of...
Throughout much of the world's oceans, life is organized around seasonal cycles of feast and famine. Here we seek to understand the life-history strategies by which marine organisms contend with seasonal variations through a range of adaptations and traits, including overwintering stages, dormancy, investment in reserves, and migration. Our perspec...
Marine biota are redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of...
Marine biota is redistributing at a rapid pace in response to climate change and shifting seascapes. While changes in fish populations and community structure threaten the sustainability of fisheries, our capacity to adapt by tracking and projecting marine species remains a challenge due to data discontinuities in biological observations, lack of d...
Species are redistributing globally in response to climate warming, impacting ecosystem functions and services. In the Barents Sea, poleward expansion of boreal species and a decreased abundance of Arctic species are causing a rapid borealisation of the Arctic communities. This borealisation might have profound consequences on the Arctic food web b...
A fundamental challenge in ecology is to understand why species are found where they are and predict where they are likely to occur in the future. Trait-based approaches may provide such understanding, because it is the traits and adaptations of species that determine which environments they can inhabit. It is therefore important to identify key tr...
Large‐scale alterations in marine ecosystems as a response to environmental and anthropogenic pressures have been documented worldwide. Yet, these are primarily investigated by assessing abundance fluctuations of a few dominant species, which inadequately reflect ecosystem‐wide changes. In addition, it is increasingly recognized that it is not spec...
The ICES Working Group on comparative analyses between European Atlantic and Mediterra-nean Ecosystems to move towards an Ecosystem-based Approach to Fisheries (WGCOMEDA) recently completed its second three-year cycle. WGCOMEDA was established in 2014 and works in cooperation with other groups within the ICES Integrated Ecosystem Assessments Steeri...
Coastal habitats are used by a great variety of organisms during some or all stages of their life cycle. When assessing the link between biological communities and their environment, most studies focus on environmental gradients, whereas the comparison between multiple habitats is rarely considered. Consequently, trait-based aspects of biodiversity...
Marine ecosystems are exposed to a range of environmental and anthropogenic stressors, including climate change and overexploitation. A promising way towards understanding the impacts of such stressors on community composition is by considering species traits rather than species identity. Here, we describe the spatio-temporal dynamics in fish commu...
The rate at which biological diversity is altered on both land and in the sea, makes temporal community development a critical and fundamental part of understanding global change. With advancements in trait‐based approaches, the focus on the impact of temporal change has shifted towards its potential effects on the functioning of the ecosystems. Ou...
Trait-based approaches enable comparison of community composition across multiple organism groups. Yet, little is known about the degree to which empirical trait responses found for one taxonomic group can be generalized across organisms. In this study, we investigated the spatial variability of marine community-weighted mean traits and compared th...
Biodiversity is a multifaceted concept, yet most biodiversity studies have taken a taxonomic approach, implying that all species are equally important. However, species do not contribute equally to ecosystem processes and differ markedly in their responses to changing environments. This recognition has led to the exploration of other components of...
Overview of species aggregations into multi-species groups.
(DOCX)
Summary statistics of natural and anthropogenic environmental covariates used in the relative variable importance analysis.
(DOCX)
Relative biomass of all species.
(DOCX)
Ratios of TRic to SRic, and TEve to SEve over the study period.
(DOCX)
Abundance to biomass-conversion parameters.
(DOCX)
Trait information on all species.
(DOCX)
Temporally averaged values of natural and anthropogenic environmental covariates.
(XLSX)
Values of biodiversity indicators per year per ICES rectangle.
(XLSX)
Biomass of species per year per ICES rectangle.
(XLSX)
One of the major goals in biogeography is describing and understanding species distributions. However, when focusing on taxonomy one may miss the mechanistic understanding of what underlies these distributions. Trait-based ecologists argue that traits are useful in explaining where species occur, since it is the traits that determine how species re...
The life history of a species is determined by trade-offs between growth, survival and reproduction to maximize fitness in a given environment. Following a theoretical model, we investigate whether the composition of marine fish communities can be understood in terms of a set of life-history strategies and whether the prevalence of the strategies f...
Marine ecosystems are exposed to both environmental and anthropogenic stressors which may impact biological communities by altering their trait composition. Individual and population responses to stressors such as climate change and fishing, have previously been demonstrated through changes in life-history traits. However, less is known to what ext...
The presence and survival of the species in a community depend on their abilities to
maximize fitness in a given environment. The study of the processes that control survival and
co-existence, termed ‘assembly rules’, follows various mechanisms, primarily related to biotic or
abiotic factors. To determine assembly rules, ecological similarities of...
While the impact of environmental forcing on recruitment variability in marine populations remains largely elusive, studies spanning large spatial areas and many stocks are able to identify patterns common to different regions and species. In this study, we investigate the effects of the environment on the residuals of a Ricker stock-recruitment (S...
Projects
Projects (3)
Global change is causing redistribution of marine species worldwide, modifying taxonomic and trait community compositions. These changes may have strong impacts on natural fish biodiversity and related ecosystem services.
However, our capacity to assess and monitor short and long-term changes in species distribution and biodiversity is hampered by the availability and heterogeneity of data.
The project aims at (i) collecting and combining unique data sets of more than 70 scientific trawl surveys across the globe (metadata and species abundance from more than 220,000 haul samples) and species traits of marine fishes, as well as assessing changes in (ii) species life-history strategy composition and (iii) community diversity of fish, across time at complementary spatial scales (local to global), across tropical, temperate and boreal ecosystems.
This project will provide a framework for identifying and predicting biodiversity responses to global changes. In addition, it will permit the identification of areas of concern, and suggesting measures that might contribute, for example, to mitigate fisheries-related responses to global change.
https://www.fondationbiodiversite.fr/en/the-frb-in-action/programs-and-projects/le-cesab/fishglob/
Global change is causing redistribution of marine species worldwide, modifying taxonomic and trait community compositions. These changes may have strong impacts on natural fish biodiversity and related ecosystem services. However, our capacity in assessing and following short and long-term changes in species distribution and biodiversity locally to globally is hampered by the availability and heterogeneity of data. The project aims at (i) collecting and combining unique datasets of scientifict trawl surveys (metadata and species abundance) and species traits of marine fishes at global scale, and assessing changes in (ii) species life-history strategy composition and (iii) community diversity of fish, in space and time, across tropical, temperate and boreal ecosystems.
