@inbook {5497, title = {De la nuisibilit{\'e} {\`a} la patrimonialit{\'e} en milieu marin. L{\textquoteright}histoire d{\textquoteright}une ambigu{\"\i}t{\'e} entretenue}, booktitle = {Sales b{\^e}tes, mauvaises herbes}, volume = {1}, year = {2018}, publisher = {Presses Universitaires de Rennes}, organization = {Presses Universitaires de Rennes}, address = {Rennes}, author = {Patrick, Le Mao and Nicolas Desroy and J{\'e}r{\^o}me Fournier and Laurent Godet and Eric Thi{\'e}baut} } @article {5363, title = {Differences in home-range sizes of a bird species in its original, refuge and substitution habitats: challenges to conservation in anthropogenic habitats}, journal = {Biodiversity and Conservation}, volume = {27}, year = {2018}, pages = {719-732}, abstract = {

In the current context of the anthropocene, the original habitats of many species have been modified or destroyed. Animals may be forced to move from their original habitats, either to refuge habitats that are suboptimal natural habitats, or to substitution habitats that are anthropogenic. The quality of refuge habitats may be lower than that of the original ones, whereas substitution habitats may be of a similar or even better quality. Here, we test this hypothesis empirically, using the example of coastal populations of the bluethroat, Luscinina svecica namnetum. In a radio-tracking survey, we compared the home-range sizes (considered here a proxy of habitat quality) of the breeding males in their original (coastal saltmarshes), refuge (inland reedbeds) and substitution (coastal salinas) habitats. We found that home ranges are up to 15 times larger in the substitution habitat than in the original one, and intermediate in the refuge habitat, suggesting that substitution habitats have the lowest quality and original habitats the highest. To date, most studies and
conservation programs related to this species have focused on its substitution habitats. This result challenges the interest of focusing on anthropogenic habitats when studying and conserving such a species, because such habitats may only be low-quality substitutes.

}, doi = {doi.org/10.1007/s10531-017-1460-3}, author = {Laurent Godet and Cl{\'e}ment Harmange and Matthieu Marquet and Emmanuel Joyeux and J{\'e}r{\^o}me Fournier} } @article {5364, title = {Latitudinal Patterns in European Seagrass Carbon Reserves: Influence of Seasonal Fluctuations versus Short-Term Stress and Disturbance Events}, journal = {Frontiers in Plant Science}, volume = {9}, year = {2018}, abstract = {

Seagrass meadows form highly productive and valuable ecosystems in the marine environment. Throughout the year, seagrass meadows are exposed to abiotic and biotic variations linked to (i) seasonal fluctuations, (ii) short-term stress events such as, e.g., local nutrient enrichment, and (iii) small-scale disturbances such as, e.g., biomass removal by grazing. We hypothesized that short-term stress events and smallscale disturbances may affect seagrass chance for survival in temperate latitudes. To test this hypothesis we focused on seagrass carbon reserves in the form of starch stored seasonally in rhizomes, as these have been defined as a good indicator for winter survival. Twelve Zostera noltei meadows were monitored along a latitudinal
gradient in Western Europe to firstly assess the seasonal change of their rhizomal starch content. Secondly, we tested the effects of nutrient enrichment and/or biomass removal on the corresponding starch content by using a short-term manipulative field experiment at a single latitude in the Netherlands. At the end of the growing season, we observed a weak but significant linear increase of starch content along the latitudinal gradient from south to north. This agrees with the contention that such reserves are essential for regrowth after winter, which is more severe in the north. In addition, we also observed a weak but significant positive relationship between starch content at the beginning of the growing season and past winter temperatures. This implies a lower regrowth potential after severe winters, due to diminished starch content at the beginning of the growing season. Short-term stress and disturbances
may intensify these patterns, because our manipulative experiments show that when nutrient enrichment and biomass loss co-occurred at the end of the growing season, Z. noltei starch content declined. In temperate zones, the capacity of seagrasses to accumulate carbon reserves is expected to determine carbon-based regrowth after winter. Therefore, processes affecting those reserves might affect seagrass resilience. With increasing human pressure on coastal systems, short- and small-scale stress events are expected to become more frequent, threatening the resilience of seagrass ecosystems, particularly at higher latitudes, where populations tend to have an annual cycle highly dependent on their storage capacity.

}, doi = {doi: 10.3389/fpls.2018.00088}, author = {L.M. Soissons and E.P. Haanstra and M.M. van Katwijk and R. Asmus and I. Auby and L. Barill{\'e} and F.G. Brun and P.G. Cardoso and Nicolas Desroy and J{\'e}r{\^o}me Fournier and F. Ganthy and J.M. Garmendia and Laurent Godet and T.F. Grilo and P. Kadel and B. Ondiviela and G. Peralta and A. Puente and M. Recio and L. Rigouin and M. Valle and P.M.J. Herman and T.J. Bouma} } @article {5365, title = {Le cas des r{\'e}cifs d{\textquoteright}hermelles Nuisible ou patrimonial : l{\textquoteright}{\'e}volution des perceptions en milieu marin}, journal = {Le Courrier de la Nature}, volume = {306}, year = {2017}, pages = {46-49}, issn = {0011-047}, author = {Patrick Le Mao and Nicolas Desroy and J{\'e}r{\^o}me Fournier and Laurent Godet and Eric Thi{\'e}baut} } @article {5000, title = {Seasonal and latitudinal variation in seagrass mechanical traits across Europe: The influence of local nutrient status and morphometric plasticity}, journal = {Limnology and Oceanography}, year = {2017}, abstract = {

Seagrasses are marine flowering plants distributed worldwide. They are however threatened, mostly due to the increase of human activities. Seagrasses have the capacity to adapt their morphological, physiological, and mechanical traits to their local conditions. Mechanical traits have been identified as a good tool to investigate a plant-species capacity to withstand physical forces or disturbances but are still sparsely studied in seagrasses. With this study, we aimed to assess how the mechanical traits of a broadly spread seagrass species vary along a latitudinal gradient in relation to its morphometric plasticity and nutrient status. We found that seagrasses acclimate their mechanical traits in relation to their physiological or morphological traits, both over the growing season and across a latitudinal range: leaves were weaker and thinner in northern areas, particularly at the end of the growing season. Besides the influence of the latitudinal gradient, leaf mechanical strength and stiffness were both strongly affected by their morphometric plasticity. Moreover, we showed that leaves mechanical traits change depending on their nutrient status: leaves were stronger and stiffer in oligotrophic conditions as compared to more eutrophic conditions. Thus, our results imply that, under eutrophication, leaves become weaker and thus more vulnerable to physical forces. This vulnerability is higher in the north at the end of the growing season. The latter is consistent with the more ephemeral character of northern seagrass meadows, in contrast to the more evergreen southern meadows.

}, doi = {10.1002/lno.10611}, url = {http://onlinelibrary.wiley.com/doi/10.1002/lno.10611/full}, author = {L.M. Soissons and M.M. van Katwijk and G. Peralta and F.G. Brun and P.G. Cardoso and T.F. Grilo and B. Ondiviela and M. Recio and M. Valle and J.M. Garmendia and F. Ganthy and I. Auby and L. Rigouin and Laurent Godet and J{\'e}r{\^o}me Fournier and Nicolas Desroy and L. Barill{\'e} and P. Kadel and R. Asmus and P.M.J. Herman and T.J. Bouma} } @article {4412, title = {Extreme landscapes decrease taxonomic and functional bird diversity but promote the presence of rare species}, journal = {Acta Ornithologica}, volume = {51}, year = {2016}, abstract = {

Human activities may generate geometrical landscape (i.e. composed of rectilinear and repetitive landscape units) structures that can significantly influence the spatial distribution of birds. While bird distribution in various landscape types has been extensively studied, the role played by landscape configuration and composition in different facets of bird diversity remains unclear. Here, these two main components of landscape characteristics (i.e. configuration and composition) are disentangled and their relative influence on three different facets of bird assemblages: taxonomic and functional characteristics, and the presence of rare species, is tested. We chose four large coastal salinas of Western France as a relevant model of geometrical and human-dominated landscapes where each landscape unit can be easily identified and mapped. The landscape characteristics of these sites were mapped and quantified. Then, terrestrial breeding birds were sampled in 172 point-counts using a standardized protocol. 69 diurnal terrestrial bird species were detected and considered in analyses (waterbirds and owls excluded). Landscape composition was found to have a higher influence on bird communities than landscape configuration, which fits with the {\textquotedblleft}landscape composition hypothesis{\textquotedblright}. More specifically, the most {\textquotedblleft}extreme{\textquotedblright} landscapes {\textemdash} those with low terrestrial surface areas, low landscape richness and diversity, low cohesion, and very patchy landscapes with complex geometrical shapes {\textemdash} host the lowest bird taxonomic abundance, richness and diversity and functional richness, but are characterized by the presence of rare species (mainly wetland specialist species, e.g. Reed Bunting Emberiza schoeniclus and species with restricted ranges e.g. Bluethroat Luscinia svecica namnetum). Our results suggest that conservation plans in such geometrical and human-dominated habitats should not only focus on one aspect of landscape characteristics or one aspect of biological diversity but also consider the adverse effects of landscape characteristics on these different facets.

}, doi = {10.3161/00016454AO2016.51.1.003}, author = {Laurent Godet and Vincent Devictor and Fran{\c c}oise Burel and Jean-Guy Robin and Lo{\"\i}c M{\'e}nanteau and J{\'e}r{\^o}me Fournier} } @article {4372, title = {Pollen limitation may be a common Allee effect in marine hydrophilous plants: implications for decline and recovery in seagrasses}, journal = {Oecologia}, year = {2016}, pages = {1-15}, doi = {10.1007/s00442-016-3665-7}, author = {B.I. Van Tussenbroek and L.M. Soissons and T.J. Bouma and R. Asmus and I. Auby and F.G. Brun and P.G. Cardoso and Nicolas Desroy and J{\'e}r{\^o}me Fournier and F. Ganthy and J.M. Garmendia and Laurent Godet and T.F. Grilo and P. Kadel and B. Ondiviela and G. Peralta and M. Recio and M. Valle and T. Van der Heide and van Katwijk, M M} } @article {4448, title = {Unexpectedmovements of male Bluethroats Luscinia svecica namnetum during the breeding period}, journal = {Alauda}, volume = {84}, year = {2016}, pages = {195-202}, abstract = {

During a radiotracking survey on 61 different males of Bluethroat Luscinia svecica namnetum from 2012 to 2015 in three different sites, we found that 8 males joined remote areas, at 300 to 900meters fromtheir regular territory and home range. Thesemovements occurred at dawn and dusk, but also at day. Such movements are not recorded in the literature and we propose four different hypotheses to explain them: the existence of {\textquotedblleft}hidden leks{\textquotedblright}, a male poly-territoriality, the look for food or for a shelter from predators.

}, author = {Cl{\'e}ment Harmange and Laurent Godet and Matthieu Marquet and Julie Dietrich and Sarah Monnet and Elisa Gr{\'e}goire and Marie-Christine Eybert and J{\'e}r{\^o}me Fournier} } @article {3325, title = {Biogenic reefs affect multiple components of intertidal soft-bottom benthic assemblages: the Lanice conchilega case study}, journal = {Estuarine, Coastal and Shelf Science}, volume = {152}, year = {2015}, month = {01/2015}, pages = {44-55}, abstract = {

Biogenic reefs composed of the tube-building polychaete Lanice conchilega are important from a conservation point of view because they noticeably increase the biodiversity in otherwise species poor
environments. However, up to now, little or no attention has been paid to the intertidal epi- and hyperbenthic communities associated with the reefs. Therefore, this is the first study which focuses on
the effect of L. conchilega reefs on the entire bentho-pelagic community at two different locations. Environmental variables were measured and macro-, epi- and hyperbenthic communities were sampled
within a L. conchilega reef and a control area at two locations in France: the bay of the Mont Saint-Michel (BMSM) and Boulogne-sur-Mer (Boulogne). The effect of the reef presence on the benthic community
was studied with a 3-factor (Reef, Location and Period) Permanova. In addition, the relationship between the benthic community and the environmental variables was investigated using Distance-based linear
models (DistLM). Most collected organisms were sampled in the reef area (macrobenthos: 91\%, epibenthos: 81\% and hyperbenthos: 78.5\%) indicating that, independent of the location, the L. conchilega
reefs positively affect all three associated benthic communities. However, the extent of the effect seems to be most pronounced for the macrobenthos and less distinct in case of the hyperbenthos. The macro-,
and epibenthos are mainly structured by biotic variables (L. conchilega density and macrobenthic food availability respectively), while the hyperbenthos is rather structured by environmental variables. In
general, L. conchilega reefs do not only affect abundances and diversity but they substantially steer the structure of the intertidal benthic sandy beach ecosystem.

}, keywords = {beaches, benthos, biogenic reefs, community composition, Lanice conchilega, tidal flats}, doi = {doi:10.1016/j.ecss.2014.11.002}, author = {De Smet, Bart and D{\textquoteright}Hondt, An Sophie and Pieterjan, Verhelst and J{\'e}r{\^o}me Fournier and Laurent Godet and Nicolas Desroy and Rabaut, Marijn and Magda, Vincx and Jan, Vanaverbeke} } @article {3838, title = {Bluethroats Luscinia svecica namnetum offset landscape constraints by expanding their home range}, journal = {Journal of Ornithology}, volume = {156}, year = {2015}, month = {06/2015}, pages = {591-600}, abstract = {

The highly fragmented landscape structures of coastal salinas are known to result in decreased terrestrial bird abundance, species richness and diversity but to promote original assemblages dominated by specialist species, such as the Bluethroat Luscinia svecica namnetum. This species is mainly found at the core of these salinas, where the landscape characteristics are a priori the most hostile for terrestrial birds. The aim of this study was to test whether individuals of a specialized species like the Bluethroat may offset such landscape constraints by expanding their home ranges. We therefore radio-tracked 21 males in 2013 and 2014 in the salinas of the Marais du Mes (Parc Naturel R{\'e}gional de Bri{\`e}re, Western France). The data of the 18 best-monitored males were used to carry out a hierarchical partitioning of variance to test the relative influence of landscape characteristics, individual characteristics\ and distance to other males on their home-range sizes. We found that landscape characteristics were the factors that best explained home range sizes. Home-range sizes were significantly smaller in diversified landscapes composed of tidal creeks and salt-marsh patches and tended to be larger in landscapes dominated by the aquatic matrix consisting of water ponds. The results of this study demonstrate that although a few bird species are able to
select a priori hostile landscapes, they can offset such constraints by expanding their home-range size.

}, author = {Laurent Godet and Matthieu Marquet and Marie-Christine Eybert and Elisa Gr{\'e}goire and Sarah Monnet and J{\'e}r{\^o}me Fournier} } @inbook {4008, title = {Invert{\'e}br{\'e}s marins introduits dans le Golfe Normand-Breton depuis 1920}, booktitle = {Atlas Permanent de la mer et du littoral}, volume = {7}, number = {51-53}, year = {2015}, publisher = {Universit{\'e} de Nantes}, organization = {Universit{\'e} de Nantes}, address = {Nantes}, author = {Laurent Godet and Patrick Le Mao and Eric Thi{\'e}baut and Christian Reti{\`e}re and Louis Cabioc{\textquoteright}h and Franck Gentil and Nicolas Desroy and J{\'e}r{\^o}me Fournier} }