Consulta: creatorFacets:"Graham, Nicholas A. J."
Registros recuperados: 16
Data/hora: 11/06/2024 08:05:25

Global baselines and benchmarks for fish biomass: comparing remote reefs and fisheries closures
Provedor de dados: 5
Autores: Mcclanahan, Tim R.; Schroeder, Robert E.; Friedlander, Alan M.; Vigliola, Laurent; Wantiez, Laurent; Caselle, Jennifer E.; Graham, Nicholas A. J.; Wilson, Shaun; Edgar, Graham J.; Stuart-smith, Rick D.; Oddenyo, Remy M.; Cinner, J. E.
Baselines and benchmarks (B&amp;Bs) are needed to evaluate the ecological status and fisheries potential of coral reefs. B&amp;Bs may depend on habitat features and energetic limitations that constrain biomass within the natural variability of the environment and fish behaviors. To evaluate if broad B&amp;Bs exist, we compiled data on the biomass of fishes in similar to 1000 reefs with no recent history of fishing in 19 ecoregions. These reefs spanned the full longitude and latitude of Indian and Pacific Ocean reefs and included older high-compliance fisheries closures (&gt;15 yr closure) and remote reef areas (&gt;9 h travel time from fisheries markets). There was no significant change in biomass over the 15 to 48 yr closure period but closures had only...
Tipo: Text
Palavras-chave: Baselines; Coral reef fish; Fisheries and ecological indicators; Pristine or virgin biomass; Sustainability.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00589/70064/68028.pdf

Relationships between structural complexity, coral traits, and reef fish assemblages
Provedor de dados: 5
Autores: Darling, Emily S.; Graham, Nicholas A. J.; Januchowski-hartley, Fraser A.; Nash, Kirsty L.; Pratchett, Morgan S.; Wilson, Shaun K.
With the ongoing loss of coral cover and the associated flattening of reef architecture, understanding the links between coral habitat and reef fishes is of critical importance. Here, we investigate whether considering coral traits and functional diversity provides new insights into the relationship between structural complexity and reef fish communities, and whether coral traits and community composition can predict structural complexity. Across 157 sites in Seychelles, Maldives, the Chagos Archipelago, and Australia's Great Barrier Reef, we find that structural complexity and reef zone are the strongest and most consistent predictors of reef fish abundance, biomass, species richness, and trophic structure. However, coral traits, diversity, and life...
Tipo: Text
Palavras-chave: Habitat diversity; Species traits; Functional ecology; Reef architecture; Scleractinian corals; Coral reef fish.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00389/49997/74763.pdf

Interspecific differences in environmental response blur trait dynamics in classic statistical analyses
Provedor de dados: 5
Autores: Mclean, Matthew; Mouillot, David; Villéger, Sébastien; Graham, Nicholas A. J.; Auber, Arnaud.
Trait-based ecology strives to better understand how species, through their bio-ecological traits, respond to environmental changes, and influence ecosystem functioning. Identifying which traits are most responsive to environmental changes can provide insight for understanding community structuring and developing sustainable management practices. However, misinterpretations are possible, because standard statistical methods (e.g., principal component analysis and linear regression) for identifying and ranking the responses of different traits to environmental changes ignore interspecific differences. Here, using both artificial data and real-world examples from marine fish communities, we show how considering species-specific responses can lead to...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00591/70266/68369.pdf

Meeting fisheries, ecosystem function, and biodiversity goals in a human-dominated world
Provedor de dados: 5
Autores: Cinner, Joshua E.; Zamborain-mason, Jessica; Gurney, Georgina G.; Graham, Nicholas A. J.; Macneil, M. Aaron; Hoey, Andrew S.; Mora, Camilo; Villéger, Sébastien; Maire, Eva; Mcclanahan, Tim R.; Maina, Joseph M.; Kittinger, John N.; Hicks, Christina C.; D’agata, Stephanie; Huchery, Cindy; Barnes, Michele L.; Feary, David A.; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham J.; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison L.; Beger, Maria; Friedlander, Alan M.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Hardt, Marah J.; Mouillot, David.
The worldwide decline of coral reefs necessitates targeting management solutions that can sustain reefs and the livelihoods of the people who depend on them. However, little is known about the context in which different reef management tools can help to achieve multiple social and ecological goals. Because of nonlinearities in the likelihood of achieving combined fisheries, ecological function, and biodiversity goals along a gradient of human pressure, relatively small changes in the context in which management is implemented could have substantial impacts on whether these goals are likely to be met. Critically, management can provide substantial conservation benefits to most reefs for fisheries and ecological function, but not biodiversity goals, given...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00623/73532/72911.pdf

Skin microbiome of coral reef fish is highly variable and driven by host phylogeny and diet
Provedor de dados: 5
Autores: Chiarello, Marlene; Auguet, Jean-christophe; Bettarel, Yvan; Bouvier, Corinne; Claverie, Thomas; Graham, Nicholas A. J.; Rieuvilleneuve, Fabien; Sucre, Elliot; Bouvier, Thierry; Villeger, Sebastien.
Background: The surface of marine animals is covered by abundant and diversified microbial communities, which have major roles for the health of their host While such microbiomes have been deeply examined in marine invertebrates such as corals and sponges, the microbiomes living on marine vertebrates have received less attention. Specifically, the diversity of these microbiomes, their variability among species, and their drivers are still mostly unknown, especially among the fish species living on coral reefs that contribute to key ecosystem services while they are increasingly affected by human activities. Here, we investigated these knowledge gaps analyzing the skin microbiome of 138 fish individuals belonging to 44 coral reef fish species living in the...
Tipo: Text
Palavras-chave: Tropical; Teleost; Microbiota; Phylogenetic diversity; Phylosymbiosis; Phylogenetic signal.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00454/56565/74934.pdf

Gravity of human impacts mediates coral reef conservation gains
Provedor de dados: 5
Autores: Cinner, Joshua E.; Maire, Eva; Huchery, Cindy; Macneil, M. Aaron; Graham, Nicholas A. J.; Mora, Camilo; Barnes, Michele L.; Kittinger, John N.; Hicks, Christina C.; D'Agata, Stephanie; Hoey, Andrew S.; Gurney, Georgina G.; Feary, David A.; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham J.; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison; Hardt, Marah J.; Beger, Maria; Friedlander, Alan M.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Gough, Charlotte; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Pardede, Shinta; Mouillot, David.
Coral reefs provide ecosystem goods and services for millions of people in the tropics, but reef conditions are declining worldwide. Effective solutions to the crisis facing coral reefs depend in part on understanding the context under which different types of conservation benefits can be maximized. Our global analysis of nearly 1,800 tropical reefs reveals how the intensity of human impacts in the surrounding seascape, measured as a function of human population size and accessibility to reefs ("gravity"), diminishes the effectiveness of marine reserves at sustaining reef fish biomass and the presence of top predators, even where compliance with reserve rules is high. Critically, fish biomass in high-compliance marine reserves located where human impacts...
Tipo: Text
Palavras-chave: Marine reserves; Fisheries; Coral reefs; Social-ecological; Socioeconomic.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00450/56115/68021.pdf

Exceptional but vulnerable microbial diversity in coral reef animal surface microbiomes
Provedor de dados: 5
Autores: Chiarello, Marlène; Auguet, Jean-christophe; Graham, Nicholas A. J.; Claverie, Thomas; Sucré, Elliott; Bouvier, Corinne; Rieuvilleneuve, Fabien; Restrepo-ortiz, Claudia Ximena; Bettarel, Yvan; Villéger, Sébastien; Bouvier, Thierry.
Coral reefs host hundreds of thousands of animal species that are increasingly threatened by anthropogenic disturbances. These animals host microbial communities at their surface, playing crucial roles for their fitness. However, the diversity of such microbiomes is mostly described in a few coral species and still poorly defined in other invertebrates and vertebrates. Given the diversity of animal microbiomes, and the diversity of host species inhabiting coral reefs, the contribution of such microbiomes to the total microbial diversity of coral reefs could be important, yet potentially vulnerable to the loss of animal species. Analysis of the surface microbiome from 74 taxa, including teleost fishes, hard and soft corals, crustaceans, echinoderms,...
Tipo: Text
Palavras-chave: Skin microbiota; Phylogenetic diversity; Conservation; Marine biodiversity; Octocorallia; Scleratinia.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74121/73596.pdf

Escaping the perfect storm of simultaneous climate change impacts on agriculture and marine fisheries
Provedor de dados: 5
Autores: Thiault, Lauric; Mora, Camilo; Cinner, Joshua E.; Cheung, William W. L.; Graham, Nicholas A. J.; Januchowski-hartley, Fraser A.; Mouillot, David; Sumaila, U. Rashid; Claudet, Joachim.
Climate change can alter conditions that sustain food production and availability, with cascading consequences for food security and global economies. Here, we evaluate the vulnerability of societies to the simultaneous impacts of climate change on agriculture and marine fisheries at a global scale. Under a “business-as-usual” emission scenario, ~90% of the world’s population—most of whom live in the most sensitive and least developed countries—are projected to be exposed to losses of food production in both sectors, while less than 3% would live in regions experiencing simultaneous productivity gains by 2100. Under a strong mitigation scenario comparable to achieving the Paris Agreement, most countries—including the most vulnerable and many of the largest...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00597/70939/69179.pdf

Social–environmental drivers inform strategic management of coral reefs in the Anthropocene
Provedor de dados: 5
Autores: Darling, Emily S.; Mcclanahan, Tim R.; Maina, Joseph; Gurney, Georgina G.; Graham, Nicholas A. J.; Januchowski-hartley, Fraser; Cinner, Joshua E.; Mora, Camilo; Hicks, Christina C.; Maire, Eva; Puotinen, Marji; Skirving, William J.; Adjeroud, Mehdi; Ahmadia, Gabby; Arthur, Rohan; Bauman, Andrew G.; Beger, Maria; Berumen, Michael L.; Bigot, Lionel; Bouwmeester, Jessica; Brenier, Ambroise; Bridge, Tom C. L.; Brown, Eric; Campbell, Stuart J.; Cannon, Sara; Cauvin, Bruce; Chen, Chaolun Allen; Claudet, Joachim; Denis, Vianney; Donner, Simon; Estradivari,; Fadli, Nur; Feary, David A.; Fenner, Douglas; Fox, Helen; Franklin, Erik C.; Friedlander, Alan; Gilmour, James; Goiran, Claire; Guest, James; Hobbs, Jean-paul A.; Hoey, Andrew S.; Houk, Peter; Johnson, Steven; Jupiter, Stacy D.; Kayal, Mohsen; Kuo, Chao-yang; Lamb, Joleah; Lee, Michelle A. C.; Low, Jeffrey; Muthiga, Nyawira; Muttaqin, Efin; Nand, Yashika; Nash, Kirsty L.; Nedlic, Osamu; Pandolfi, John M.; Pardede, Shinta; Patankar, Vardhan; Penin, Lucie; Ribas-deulofeu, Lauriane; Richards, Zoe; Roberts, T. Edward; Rodgers, Ku’ulei S.; Safuan, Che Din Mohd; Sala, Enric; Shedrawi, George; Sin, Tsai Min; Smallhorn-west, Patrick; Smith, Jennifer E.; Sommer, Brigitte; Steinberg, Peter D.; Sutthacheep, Makamas; Tan, Chun Hong James; Williams, Gareth J.; Wilson, Shaun; Yeemin, Thamasak; Bruno, John F.; Fortin, Marie-josée; Krkosek, Martin; Mouillot, David.
Without drastic efforts to reduce carbon emissions and mitigate globalized stressors, tropical coral reefs are in jeopardy. Strategic conservation and management requires identification of the environmental and socioeconomic factors driving the persistence of scleractinian coral assemblages—the foundation species of coral reef ecosystems. Here, we compiled coral abundance data from 2,584 Indo-Pacific reefs to evaluate the influence of 21 climate, social and environmental drivers on the ecology of reef coral assemblages. Higher abundances of framework-building corals were typically associated with: weaker thermal disturbances and longer intervals for potential recovery; slower human population growth; reduced access by human settlements and markets; and...
Tipo: Text
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00512/62324/66605.pdf

Bright spots among the world's coral reefs
Provedor de dados: 5
Autores: Cinner, Joshua E.; Huchery, Cindy; Macneil, M. Aaron; Graham, Nicholas A. J.; Mcclanahan, Tim R.; Maina, Joseph; Maire, Eva; Kittinger, John N.; Hicks, Christina C.; Mora, Camilo; Allison, Edward H.; D'Agata, Stephanie; Hoey, Andrew; Feary, David A.; Crowder, Larry; Williams, Ivor D.; Kulbicki, Michel; Vigliola, Laurent; Wantiez, Laurent; Edgar, Graham; Stuart-smith, Rick D.; Sandin, Stuart A.; Green, Alison L.; Hardt, Marah J.; Beger, Maria; Friedlander, Alan; Campbell, Stuart J.; Holmes, Katherine E.; Wilson, Shaun K.; Brokovich, Eran; Brooks, Andrew J.; Cruz-motta, Juan J.; Booth, David J.; Chabanet, Pascale; Gough, Charlie; Tupper, Mark; Ferse, Sebastian C. A.; Sumaila, U. Rashid; Mouillot, David.
Ongoing declines in the structure and function of the world's coral reefs(1,2) require novel approaches to sustain these ecosystems and the millions of people who depend on them(3). A presently unexplored approach that draws on theory and practice in human health and rural development(4,5) is to systematically identify and learn from the 'outliers'-places where ecosystems are substantially better ('bright spots') or worse ('dark spots') than expected, given the environmental conditions and socioeconomic drivers they are exposed to. Here we compile data from more than 2,500 reefs worldwide and develop a Bayesian hierarchical model to generate expectations of how standing stocks of reef fish biomass are related to 18 socioeconomic drivers and environmental...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00348/45872/68023.pdf

Response and Effect Traits of Coral Reef Fish
Provedor de dados: 5
Autores: Hadj-hammou, Jeneen; Mouillot, David; Graham, Nicholas A. J.
The response-and-effect framework is a trait-based approach that seeks to break down the mechanistic links between ecosystem disturbances, species' traits, and ecosystem processes. We apply this framework to a review of the literature on coral reef fish traits, in order to illustrate the research landscape and structure a path forward for the field. Traits were categorized into five broad groupings: behavioral, life history, morphological, diet, and physiological. Overall, there are fewer studies linking effect traits to ecosystem processes (number of papers on herbivory, n = 14; predation, n = 12; bioerosion, n = 2; nutrient cycling, n = 0) than there are linking response traits to disturbances (climate change, n = 26; fishing, n = 20; pollution, n = 4)....
Tipo: Text
Palavras-chave: Ecosystem processes; Environmental disturbances; Functional diversity; Coral reef ecology; Ecosystem function; Trait-based ecology; Systematic review.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00688/79975/82919.pdf

Delineating reef fish trophic guilds with global gut content data synthesis and phylogeny
Provedor de dados: 5
Autores: Parravicini, Valeriano; Casey, Jordan M.; Schiettekatte, Nina M. D.; Brandl, Simon J.; Pozas-schacre, Chloé; Carlot, Jérémy; Edgar, Graham J.; Graham, Nicholas A. J.; Harmelin-vivien, Mireille; Kulbicki, Michel; Strona, Giovanni; Stuart-smith, Rick D.
Understanding species’ roles in food webs requires an accurate assessment of their trophic niche. However, it is challenging to delineate potential trophic interactions across an ecosystem, and a paucity of empirical information often leads to inconsistent definitions of trophic guilds based on expert opinion, especially when applied to hyperdiverse ecosystems. Using coral reef fishes as a model group, we show that experts disagree on the assignment of broad trophic guilds for more than 20% of species, which hampers comparability across studies. Here, we propose a quantitative, unbiased, and reproducible approach to define trophic guilds and apply recent advances in machine learning to predict probabilities of pairwise trophic interactions with high...
Tipo: Text
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00688/79980/82934.pdf

Hierarchical drivers of reef-fish metacommunity structure
Provedor de dados: 5
Autores: Macneil, M. Aaron; Graham, Nicholas A. J.; Polunin, Nicholas V. C.; Kulbicki, Michel; Galzin, Rene; Harmelin-vivien, Mireille; Rushton, Steven P.
Coral reefs are highly complex ecological systems, where multiple processes interact across scales in space and time to create assemblages of exceptionally high biodiversity. Despite the increasing frequency of hierarchically structured sampling programs used in coral-reef science, little progress has been made in quantifying the relative importance of processes operating across multiple scales. The vast majority of reef studies are conducted, or at least analyzed, at a single spatial scale, ignoring the implicitly hierarchical structure of the overall system in favor of small-scale experiments or large-scale observations. Here we demonstrate how alpha (mean local number of species), beta diversity (degree of species dissimilarity among local sites), and...
Tipo: Text
Palavras-chave: Alpha; Beta; And gamma diversity biodiversity coral reefs ecological scales habitat structure mixed-effects models multiple working hypotheses; Reef-fish biomass species abundance species richness.
Ano: 2009
URL: https://archimer.ifremer.fr/doc/00207/31782/30195.pdf

Drivers and predictions of coral reef carbonate budget trajectories
Provedor de dados: 5
Autores: Januchowski-hartley, Fraser A.; Graham, Nicholas A. J.; Wilson, Shaun K.; Jennings, Simon; Perry, Chris T.
Climate change is one of the greatest threats to the long-term maintenance of coral-dominated tropical ecosystems, and has received considerable attention over the past two decades. Coral bleaching and associated mortality events, which are predicted to become more frequent and intense, can alter the balance of different elements that are responsible for coral reef growth and maintenance. The geomorphic impacts of coral mass mortality have received relatively little attention, particularly questions concerning temporal recovery of reef carbonate production and the factors that promote resilience of reef growth potential. Here, we track the biological carbonate budgets of inner Seychelles reefs from 1994 to 2014, spanning the 1998 global bleaching event...
Tipo: Text
Palavras-chave: Bioerosion; Coral bleaching; Carbonate production; Parrotfish; Regime shifts; Seychelles.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00374/48539/74803.pdf

Unexpected high vulnerability of functions in wilderness areas: evidence from coral reef fishes
Provedor de dados: 5
Autores: D'Agata, Stephanie; Vigliola, Laurent; Graham, Nicholas A. J.; Wantiez, Laurent; Parravicini, Valeriano; Villeger, Sebastien; Gerard Mou-tham,; Frolla, Philippe; Friedlander, Alan M.; Kulbicki, Michel; Mouillot, David.
High species richness is thought to support the delivery of multiple ecosystem functions and services under changing environments. Yet, some species might performunique functional roles while others are redundant. Thus, the benefits of high species richness in maintaining ecosystem functioning are uncertain if functions have little redundancy, potentially leading to high vulnerability of functions. We studied the natural propensity of assemblages to be functionally buffered against loss prior to fishing activities, using functional trait combinations, in coral reef fish assemblages across unfished wilderness areas of the Indo-Pacific: Chagos Archipelago, New Caledonia and French Polynesia. Fish functional diversity in these wilderness areas is highly...
Tipo: Text
Palavras-chave: Coral reef fish; Wilderness areas; Redundancy; Baseline functional vulnerability.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00366/47680/68025.pdf

Community-wide scan identifies fish species associated with coral reef services across the Indo-Pacific
Provedor de dados: 5
Autores: Maire, Eva; Villeger, Sebastien; Graham, Nicholas A. J.; Hoey, Andrew S.; Cinner, Joshua; Ferse, Sebastian C. A.; Aliaume, Catherine; Booth, David J.; Feary, David A.; Kulbicki, Michel; Sandin, Stuart A.; Vigliola, Laurent; Mouillot, David.
Determining whether many functionally complementary species or only a subset of key species are necessary to maintain ecosystem functioning and services is a critical question in community ecology and biodiversity conservation. Identifying such key species remains challenging, especially in the tropics where many species co-occur and can potentially support the same or different processes. Here, we developed a new community-wide scan CWS) approach, analogous to the genome-wide scan, to identify fish species that significantly contribute, beyond the socio-environmental and species richness effects, to the biomass and coral cover on Indo-Pacific reefs. We found that only a limited set of species (51 out of approx. 400, = approx. 13%), belonging to various...
Tipo: Text
Palavras-chave: Ecosystem functioning; Biodiversity; Fish community; Key species; Ecosystem services; Coral reefs.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00452/56388/68019.pdf