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Registros recuperados: 23
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A three-dimensional view on biodiversity changes: spatial, temporal, and functional perspectives on fish communities in the Baltic Sea ArchiMer
Frelat, Romain; Orio, Alessandro; Casini, Michele; Lehmann, Andreas; Merigot, Bastien; Otto, Saskia A.; Sguotti, Camilla; Moellmann, Christian.
Fisheries and marine ecosystem-based management requires a holistic understanding of the dynamics of fish communities and their responses to changes in environmental conditions. Environmental conditions can simultaneously shape the spatial distribution and the temporal dynamics of a population, which together can trigger changes in the functional structure of communities. Here, we developed a comprehensive framework based on complementary multivariate statistical methodologies to simultaneously investigate the effects of environmental conditions on the spatial, temporal and functional dynamics of species assemblages. The framework is tested using survey data collected during more than 4000 fisheries hauls over the Baltic Sea between 2001 and 2016. The...
Tipo: Text Palavras-chave: Baltic Sea; Demersal fish community; Functional traits; Multivariate analysis; Spatio-temporal dynamics; Species distribution.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00475/58659/62410.pdf
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Alternatives to taxonomic-based approaches to assess changes in transitional water communities ArchiMer
Mouillot, D; Spatharis, S; Reizopoulou, S; Laugier, Thierry; Sabetta, L; Basset, A; Chi, T.
1. Transitional waters, described as critical transition zones because of their position at terrestrial, freshwater and marine interfaces, provide essential goods and services to the biosphere including human populations. These ecotones face increasing human influence mainly due to population density increase in coastal areas. 2. Transitional water bodies have, to date, received little attention in the development of ecological status indicators, this is a critical deficiency when trying to meet the Water Framework Directive objective of all significant water bodies achieving good ecological status by the year 2015. 3. In order to assess changes in transitional water communities many taxonomic-based indicators have already been proposed but there are a...
Tipo: Text Palavras-chave: Biotic descriptors; Productivity; Functional diversity; Functional traits; Body size; Water Framework Directive WFD.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1849.pdf
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Assessing the spatial variation of functional diversity estimates based on dendrograms in phytoplankton communities Acta Botanica
Machado,Karine Borges; Teresa,Fabrício Barreto; Nabout,João Carlos.
ABSTRACT Variation in phytoplankton functional diversity is partioned and mapped using several indices and linkage methods based on dendrograms. The relationships between diversity metrics and major environmental predictors, including zooplankton density, were assessed in 29 phytoplankton communities of floodplain lakes distributed along the Middle Araguaia River in central Brazil. The dendrogram-based functional diversity indices were Functional Group Richness, Functional Diversity, Mean Pairwise Distance and Mean Nearest Taxon Distance, whereas seven different hierarchical agglomerative linkage methods we used. The performance of indices were compared using ANOVA and their spatial variation in response to major environmental predictors evaluated. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araguaia River; Functional traits; Linkage method; Mean Nearest Taxon Distance; Mean Pairwise Distance.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400571
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Chlorophyll fluorescence varies more across seasons than leaf water potential in drought-prone plants Anais da ABC (AABC)
ROSADO,BRUNO H.P.; MATTOS,EDUARDO A. DE.
ABSTRACT Among the effects of environmental change, the intensification of drought events is noteworthy, and tropical vegetation is predicted to be highly vulnerable to it. However, it is not clear how tropical plants in drought-prone habitats will respond to this change. In a coastal sandy plain environment, we evaluated the response of six plant species to water deficits across seasons, the relationship between their morpho-physiological traits, and which traits would be the best descriptors of plants' response to drought. Regardless of leaf succulence and phenology, responses between seasons were most strongly related to chlorophyll fluorescence. In this study we have demonstrated that a better comprehension of how tropical species from drought-prone...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Drought; Functional traits; Plant-water relations; Photoinhibition; Seasonal habitats.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000200549
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Complementarity of the multidimensional functional and the taxonomic approaches to study phytoplankton communities in three Mediterranean coastal lagoons of different trophic status ArchiMer
Leruste, A.; Villeger, S.; Malet, Nathalie; De Wit, R.; Bec, B..
We used the individual-based multidimensional functional diversity and the taxonomic approaches in a complementary way to describe phytoplankton communities in three coastal lagoons with different eutrophication status in the South of France. We sampled communities during three seasons, i.e., in autumn, spring, and summer. Using classical taxonomy, 107 taxa/morphotypes were identified in the nine communities. The individual-based functional approach allowed grouping these individuals into 20 functional entities according to their values for 5 traits related to trophic adaptations (cell size, mobility, trophic regime, coloniality, and pelagic/benthic life). Some species (e.g., Prorocentrum micans) emerged in multiple functional entities, showing the...
Tipo: Text Palavras-chave: Classification; Functional entity; Functional traits; Taxonomic diversity.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00433/54454/55826.pdf
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Direct seeded and colonizing species guarantee successful early restoration of South Amazon forests. Repositório Alice
RODRIGUES, S. B.; FREITAS, M. G.; CAMPOS-FILHO, E. M.; CARMO, G. H. P. do; VEIGA, J. M. da; JUNQUEIRA, R. G. P.; VIEIRA, D. L. M..
bitstream/item/201752/1/1-s2.0-S0378112719310552-main.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Evergreen seasonal forest; Functional traits; Life-history traits; Species composition; Direct seeding; Ecological restoration.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112074
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Direct seeding of 16 Brazilian savanna trees: responses to seed burial,mulching and an invasive grass. Repositório Alice
SILVA, R. R. P.; VIEIRA, D. L. M..
2017
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Functional traits; Neotropical savanna; Seed traits; Seedling morphofunctional types; Cerrado; Ecological restoration; Restoration ecology.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1072029
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Do seedling functional groups reflect ecological strategies of woody plant species in Caatinga? Acta Botanica
Menezes,Tatiane Gomes Calaça; Rodal,Maria Jesus Nogueira; Lima,André Luiz Alves de; Lima,Lucivania Rodrigues; Pinto,Monalisa Alves Diniz S. C.; Melo,André Laurênio de.
ABSTRACT It is assumed that morphological traits of seedlings reflect different strategies in response to environmental conditions. The ecological significance of this has been widely documented in rainforests, where habitat structure and species interactions play an important role in community assembly. However, in seasonally dry ecosystems, where environmental filtering is expected to strongly influence community structure, this relationship is poorly understood. We investigated this relationship between functional groups of seedlings and life history traits and tested whether functional group predicts the ecological strategies employed by woody species to deal with the stressful conditions in seasonally dry ecosystems. Seedling functional groups, life...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dry forest; Environmental filtering; Functional traits; Initial establishment; Recruitment; Seasonality.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100020
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Dynamique de la diversité fonctionnelle des communautés de poissons (lagune de Terminos, Mexique) ArchiMer
Villeger, Sébastien.
One of the main challenges in ecology is to understand how global changes affect biodiversity and what are the consequences on ecosystem functioning. In this perspective, the functional diversity of communities is a cornerstone since it allows linking environment, community structure and ecosystem properties. The aim of this thesis is thus to improve the understanding of functional diversity dynamic (i) in relation to natural variability of environmental conditions and (ii) under anthropogenic disturbances. As a first step we have developed a new methodological framework allowing to (1) describe fish functional niches based on functional traits, and (2) to quantify functional diversity within (α) and among (β) sites thanks to new indices....
Tipo: Text Palavras-chave: Gulf of Mexico; Nekton; Teleostian; Global changes; Environmental gradient; Estuarine ecosystem; Functional diversity indices; Functional traits; Golfe du Mexique; Necton; Téléostéens; Changements globaux; Gradient environnemental; Écosystème estuarien; Indices de diversité fonctionnelle; Traits fonctionnels.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/these-6178.pdf
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Floristic-functional variation of tree component along an altitudinal gradient in araucaria forest areas, in Southern Brazil Anais da ABC (AABC)
SOBOLESKI,VANESSA F.; HIGUCHI,PEDRO; SILVA,ANA CAROLINA DA; SILVA,MARIELE A.F. DA; NUNES,AMANDA S.; LOEBENS,RODINELI; SOUZA,KARINE DE; FERRARI,JHENIFFER; LIMA,CARLA L.; KILCA,RICARDO V..
ABSTRACT We aimed to investigate the taxonomic and functional variations of tree component of Araucaria Forest (AF) areas located along an altitudinal gradient (700, 900 and 1,600 m asl), in the southern region of Brazil. The functional traits determined were leaf area, specific leaf area, wood density, maximum potential height and dispersal syndromes and deciduousness. The data were analyzed through a functional and taxonomic dissimilarity dendrograms, community-weighted mean trait values, parametric and nonparametric tests, and Principal Component Analysis. The largest floristic-structural similarity was observed between the lower altitude areas (700 and 900 m asl), whose Bray-Curtis distance was 0.63. The area at 700 m asl was characterized by a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Functional traits; Altitude; Similarity; Subtropical forest.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502219
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Food-web complexity across hydrothermal vents on the Azores triple junction ArchiMer
Portail, Marie; Brandily, Christophe; Cathalot, Cecile; Colaco, Ana; Gelinas, Yves; Husson, Berengere; Sarradin, Pierre-marie; Sarrazin, Jozee.
The assessment and comparison of food webs across various hydrothermal vent sites can enhance our understanding of ecological processes involved in the structure and function of biodiversity. The Menez Gwen, Lucky Strike and Rainbow vent fields are located on the Azores triple junction of the Mid-Atlantic Ridge. These fields have distinct depths (from 850 to 2320 m) and geological contexts (basaltic and ultramafic), but share similar faunal assemblages defined by the presence of foundation species that include Bathymodiolus azoricus, alvinocarid shrimp and gastropods. We compared the food webs of 13 faunal assemblages at these three sites using carbon and nitrogen stable isotope analyses (SIA). Results showed that photosynthesis-derived organic matter is a...
Tipo: Text Palavras-chave: Mid-Atlantic Ridge; Hydrothermal vents; Food webs; Stable isotopes; Functional traits.
Ano: 2018 URL: http://archimer.ifremer.fr/doc/00414/52551/53732.pdf
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Functional reorganization of marine fish nurseries under climate warming ArchiMer
Mclean, Matthew J.; Mouillot, David; Goascoz, Nicolas; Schlaich, Ivan; Auber, Arnaud.
While climate change is rapidly impacting marine species and ecosystems worldwide, the effects of climate warming on coastal fish nurseries have received little attention despite nurseries’ fundamental roles in recruitment and population replenishment. Here, we used a 26‐year time series (1987–2012) of fish monitoring in the Bay of Somme, a nursery in the Eastern English Channel (EEC), to examine the impacts of environmental and human drivers on the spatial and temporal dynamics of fish functional structure during a warming phase of the Atlantic Multidecadal Oscillation (AMO). We found that the nursery was initially dominated by fishes with r‐selected life‐history traits such as low trophic level, low age and size at maturity, and small offspring, which...
Tipo: Text Palavras-chave: Atlantic Multidecadal Oscillation; Climate change; Ecosystem function; English Channel; Fisheries; Functional traits; Life history; Recruitment.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00471/58276/60818.pdf
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Functional-biogeography of the reef fishes of the islands of the Gulf of California: Integrating functional divergence into marine conservation ArchiMer
Olivier, Damien; Loiseau, Nicolas; Petatan-ramirez, David; Trujillo Milian, Oscar; Suarez-castillo, Alvin N.; Torre, Jorge; Munguia-vega, Adrian; Reyes-bonilla, Hector.
The Gulf of California (GC) is a semi-closed sea in the Tropical Eastern Pacific and is recognised as a highly diverse marine ecosystem. Despite this status, this region is still poorly studied in comparison to other marine hotspots. To start filling this gap, we attempt to provide a global overview of reef-fish diversity around the numerous islands of the region. We evaluated species richness, the abundance and biomass, and the functional diversity of the fish assemblages for the major islands of the GC. We first highlight that the southwestern part of the central GC is the hotspot of reef-fishes diversity within the GC, in terms of species richness, functional diversity, and fish abundance. We then found out an important functional divergence between...
Tipo: Text Palavras-chave: Biodiversity; Biologically important area; Functional traits; Marine protected area; Sea of Cortez; Tropical Eastern Pacific.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00476/58786/62421.pdf
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Global change and climate-driven invasion of the Pacific oyster (Crassostrea gigas) along European coasts: a bioenergetics modelling approach ArchiMer
Thomas, Yoann; Pouvreau, Stephane; Alunno-bruscia, Marianne; Barille, Laurent; Gohin, Francis; Bryere, Philippe; Gernez, Pierre.
Aim The spread of non-indigenous species in marine ecosystems world-wide is one of today's most serious environmental concerns. Using mechanistic modelling, we investigated how global change relates to the invasion of European coasts by a non-native marine invertebrate, the Pacific oyster Crassostrea gigas. Location Bourgneuf Bay on the French Atlantic coast was considered as the northern boundary of C. gigas expansion at the time of its introduction to Europe in the 1970s. From this latitudinal reference, variations in the spatial distribution of the C. gigas reproductive niche were analysed along the north-western European coast from Gibraltar to Norway. Methods The effects of environmental variations on C. gigas physiology and phenology were studied...
Tipo: Text Palavras-chave: Biogeographical range expansion; Crassostrea gigas; DEB model; European coasts; Functional traits; Global change; Individual-based model; Invasive species; Remote-sensing.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00287/39828/38459.pdf
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Hide and seek in the Bay of Biscaya functional investigation of marine megafauna and small pelagic fish interactions ArchiMer
Lambert, Charlotte; Authier, Matthieu; Doray, Mathieu; Doremus, Ghislain; Spitz, Jerome; Ridoux, Vincent.
Prey and predator distributions influence one another. Understanding the scale and the orientation of predator-prey spatial correlations is crucial in foraging ecology. Growing evidence suggests that predator-prey interactions are more constrained by functional characteristics of both the predator and the prey. Unfortunately, in marine pelagic systems, the scale and orientation of spatial correlations between predators and prey have been only little explored from a functional point of view. We tested the existence of fine-scale association between predators and fish functional groups. Visual predator sightings and acoustic fish records were collected synchronously during oceanographic surveys from 2004 to 2014. Prey biomass was integrated by nautical miles...
Tipo: Text Palavras-chave: Bay of Biscay; Cetaceans; Functional traits; Marine top predators; Predator avoidance; Predator-prey interactions; Prey profitability; Seabirds.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00488/59998/63448.pdf
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Implications of morphological and functional traits for trophic relationships within fish communities and marine trophic network architecture ArchiMer
Cachera, Marie.
A current issue in ecology is to understand the contribution of biodiversity to ecosystem functioning and notably to comprehend how inter- and intra-specific trait variation affects trophic interactions between individuals and species, the trophic organization of communities and trophic network architecture. Particularly, morphology has historically been considered as a main determinant of organisms’ ecology, which led to the field of ecomorphology, and, from a functional perspective, is expected to influence trophic relationships and other ecological functions performed by species. This thesis aimed at studying the trophic organization of a marine fish community and its dependency on morphological and functional trait variation between and within species....
Tipo: Text Palavras-chave: Communauté; Morphologie; Réseau trophique; Niche; Traits fonctionnels; Manche Est; Community; Morphology; Trophic network; Niche; Functional traits; Eastern English Channel.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00195/30603/29069.pdf
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Influence of light on the initial growth of invasive Cryptostegia madagascariensis Bojer in the Brazilian semiarid region Biological Sciences
Brito, Selma Freire de; Pinheiro, Charles Lobo; Nogueira, Francisco Carlos Barboza; Medeiros Filho, Sebastião; Matos, Dalva Maria da Silva.
The invasion by Cryptostegia madagascariensis causes economic and environmental problems in Northeastern Brazil. Current study evaluates the initial growth of C. madagascariensis on light gradient. The experiment used 0, 30, 50 and 70% shading treatments arranged in a completely randomized design and evaluated in four periods, namely, 35, 50, 65 and 80 days. Height, absolute growth rate, relative growth rate, number of side branches, number of leaves, leaf area, specific leaf area, leaf area ratio, root mass ratio, stem mass ratio, leaf mass ratio and leaf area/root mass ratio were evaluated. Results showed that the height was greater in shade environments, and the greater the available light, the greater was the number of side branches. C....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Functional traits; Caatinga; Shading; Morphological adjustments; Biomass.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/28179
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Interaction between extreme weather events and megadams increases tree mortality and alters functional status of Amazonian forests. Repositório Alice
MOSER, P.; SIMON, M. F.; MEDEIROS, M. B. de; GONTIJO, A. B.; COSTA, F. R. C..
bitstream/item/210820/1/1365-2664.13498.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Dams; Flood tolerance; Functional traits; Precipitation anomaly; Root tissue density; Stomata density; Global warming; Tree mortality.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1112499
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Microbial functional diversity: From concepts to applications ArchiMer
Escalas, Arthur; Hale, Lauren; Voordeckers, James W.; Yang, Yunfeng; Firestone, Mary K.; Alvarez‐cohen, Lisa; Zhou, Jizhong.
Functional diversity is increasingly recognized by microbial ecologists as the essential link between biodiversity patterns and ecosystem functioning, determining the trophic relationships and interactions between microorganisms, their participation in biogeochemical cycles, and their responses to environmental changes. Consequently, its definition and quantification have practical and theoretical implications. In this opinion paper, we present a synthesis on the concept of microbial functional diversity from its definition to its application. Initially, we revisit to the original definition of functional diversity, highlighting two fundamental aspects, the ecological unit under study and the functional traits used to characterize it. Then, we discuss how...
Tipo: Text Palavras-chave: Functional diversity; Functional traits; Microbial communities; Theoretical frameworks of diversity; Trait-based ecology.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00584/69631/67487.pdf
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Morphoanatomical functional traits in xerophytic species of a saline environment Phyton
Pérez Cuadra,V; Cambi,V.
The halophytic community of Salitral de la Vidriera (Buenos Aires Province, Argentina) has species with different morphoanatomical functional traits. The aim of this study was to compare these traits in four species, two Asteraceae (Baccharis spartioides and B. tenella) and two Frankeniaceae (Frankenia juniperoides and F. pulverulenta). Leaves and stems were treated under traditional techniques for anatomical study. Leaves the of Asteraceae and F. pulverulenta were amphistomatic while in F. juniperoides they were hypostomatic. All species showed trichomes and only the Frankeniaceae had salt glands. The mesophyll was isolateral in Asteraceae, and dorsiventral in Frankeniaceae; the number of foliar vascular bundles was variable. The stems of the Asteraceae...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Asteraceae; Frankeniaceae; Halophytic species; Functional traits; Anatomy.
Ano: 2014 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572014000200022
Registros recuperados: 23
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