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| Aaron W. Baum; Tadeusz Patzek; Martin Bender; Steve Renich; Wes Jackson. |
| An understanding of agriculture's energy, material, and labor requirements is essential for achieving economic and ecological sustainability, and for assessing the effectiveness of relevant policy decisions (biofuel subsidies, regulations, labeling, etc.). Previous studies of energy, materials, and labor use in farming have been based on either unverified voluntary reporting or test plots, rather than on the high-resolution measurements of mass and energy flows. Here we present a recursive analysis of 1.25 million data points describing in unprecedented detail the resource transactions on a 60 ha farm functioning for over 6 years. This analysis highlights the importance of accounting for all types of materials, as well as capital equipment,... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2010 |
URL: http://precedings.nature.com/documents/4291/version/1 |
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| Abdel-Aziz, N.E.. |
| Diel vertical migration of different zooplankton groups in Dekhaila Harbor was studied monthly from May 2003 to April 2004. Generally, more groups were found in the surface layer (0-10 m.) than the deeper one (10-20 m.). Some zooplankton groups undergo significant vertical migration at certain time of the year, others showed no clear differences in distribution patterns and exhibited no directed movement patterns. Some species stayed a part of the day within certain layer of the water column, others were randomly dispersed in the whole water column during different hours. Responses appear to depend also on the life stages of each zooplankton group, as well as other ecological conditions such as temperature, light and amount of food. Population budget... |
| Tipo: Journal Contribution |
Palavras-chave: Hydrobiology Studies; Zooplankton; Vertical migrations; Ecology; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_15490. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/1455 |
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| Abdennadher, M.. |
| Cette thèse a pour objectif principal la caractérisation taxonomique, physiologique et écologique d’espèces de dinoflagellés associées à des alertes de toxicité dans le golfe de Gabès à savoir : Alexandrium minutum, Prorocentrum lima, Coolia monotis et Ostreopsis ovata. L’optimisation des conditions de culture des espèces de dinoflagellés et la mise en place d’une phytothèque composée d’une collection de cultures de microalgues toxiques étaient notre priorité dans cette investigation. Une analyse de la base des données REPHY a été effectuée dans le cadre de cette thèse. L’étude taxonomique moyennant la microscopie électronique en transmission et à balayage nous a permis de déceler les importantes caractéristiques morphologiques de distinction pour chaque... |
| Tipo: Theses and Dissertations |
Palavras-chave: Physiology; Taxonomy; Ecology; Phytoplankton culture. |
| Ano: 2014 |
URL: http://hdl.handle.net/1834/5924 |
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| Abhay Krishna. |
| Compared to other natural sciences ecological sciences has always been about seeing the bigger picture. The realization that local actions can have global impact has been the hallmark of ecological research. This integrative view is getting more and more accepted now with the recognition that whole is definitely more then sum of its parts. Advancement in computer sciences has now made it possible to comprehend the complexity arising from an integrative approach. This has given rise to a field interfacing computer science and ecological sciences called Ecoinformatics. The other popular parallel and more mature field is bioinformatics or computational biology. The presentation will take the audience on an Ecoinformatics tour touching on present status of... |
| Tipo: Presentation |
Palavras-chave: Ecology; Bioinformatics; Earth & Environment. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/2018/version/1 |
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| Abhay Krishna. |
| In a fascinating tussle of perspectives in Volume 6 and issue no 3 of april 2008 Frontiers in Ecology and Evolution, Martin A Nuñez and Gregory M Crustinger enlist ways to brace up with the recent literature. They advocate that PhD students should choose a well studied system to have better chances of success. On the other side of this fascinating tussle Daniel Simberloff and Nathan J Sanders agree with there enthusiastic case and approaches for bracing up with the recent literature. However, they disagree with the play safe strategy of start-ups in ecology and evolution.

For me this tussle of perspectives is really fascinating. It underlines the story of our times. In the times of information explosion, should... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Bioinformatics; Earth & Environment. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1959/version/1 |
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| Abhay Krishna; Ajit Narayanan. |
| Genome-scale molecular networks, including gene pathways, gene regulatory networks and protein interactions, are central to the investigation of the nascent disciplines of systems biology and bio-complexity. Dissecting these genome-scale molecular networks in its all-possible manifestations is paramount in our quest for a genotype-input phenotype-output application which will also take environment-genome interactions into account.

Machine learning approaches are now increasingly being used for reverse engineering such networks. Our work stresses the importance of a system approach in biological research and how artificial neural networks are at the forefront of Artificial Intelligence techniques that are increasingly... |
| Tipo: Presentation |
Palavras-chave: Ecology; Bioinformatics. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/2003/version/1 |
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| Adam M. Goldstein. |
| Existing ontologies model components of evolution, but none synthesize them or describe the framework of ideas used to conceptualize evolution. The Evolution Ontology (EO) aims to do just this. EO models processes (e.g. natural selection); contexts (e.g. habitats); the entities that undergo evolution; and the theories, methods, and disciplines of evolutionary science. Uses include data curation, data mining, and literature curation, EO’s developers working on the latter two for works of Darwin and the Biodiversity Heritage Library. |
| Tipo: Poster |
Palavras-chave: Ecology; Bioinformatics; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3557/version/1 |
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| Adams, Megan S.; Department of Geography, University of Victoria; Raincoast Conservation Foundation; Hakai Beach Institute; megan.s.adams@gmail.com; Carpenter, Jennifer; Heiltsuk Integrated Resource Management Department; jcarpenter2@heiltsuknation.ca; Housty, Jess A.; Qqs Projects Society;; Neasloss, Douglass; Kitasoo/Xai-Xais Integrated Resource Authority; Spirit Bear Research Foundation;; Paquet, Paul C.; Department of Geography, University of Victoria; Raincoast Conservation Foundation; ppaquet@baudoux.ca; Service, Christina; Department of Geography, University of Victoria; Spirit Bear Research Foundation; Hakai Beach Institute; christina.service@gmail.com; Walkus, Jennifer; Wuikinuxv Nation Fisheries;; Darimont, Chris T.; Department of Geography, University of Victoria; Raincoast Conservation Foundation; Hakai Beach Institute; darimont@uvic.ca. |
| Ecological research, especially work related to conservation and resource management, increasingly involves social dimensions. Concurrently, social systems, composed of human communities that have direct cultural connections to local ecology and place, may draw upon environmental research as a component of knowledge. Such research can corroborate local and traditional ecological knowledge and empower its application. Indigenous communities and their interactions with and management of resources in their traditional territories can provide a model of such social-ecological systems. As decision-making agency is shifted increasingly to indigenous governments in Canada, abundant opportunities exist for applied ecological research at the community level.... |
| Tipo: Peer-Reviewed Synthesis |
Palavras-chave: Aboriginal; Collaborative research; Community engagement; Ecology; First Nations; Indigenous communities; Natural science; Resource management; Social-ecological systems; Trust. |
| Ano: 2014 |
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| Adrian G. Dyer; Alan Dorin; Verena Reinhardt; Marcello G. P. Rosa. |
| Foraging bees use colour cues to help identify rewarding from unrewarding flowers, but as conditions change, bees may require behavioural flexibility to reverse their learnt preferences. Perceptually similar colours are learnt slowly by honeybees and thus potentially pose a difficult task to reverse-learn. Free-flying honeybees (N = 32) were trained to learn a fine colour discrimination task that could be resolved at ca. 70% accuracy following extended differential conditioning, and were then tested for their ability to reverse-learn this visual problem multiple times. Subsequent analyses identified three different strategies: ‘Deliberative-decisive’ bees that could, after several flower visits, decisively make a large change to... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Neuroscience. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/7037/version/1 |
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| Agnes Gault; Yves Meinard; Franck Courchamp. |
| The international market for luxury goods has almost doubled since 1990, with a worldwide increase of 10% annually. This trade is fuelled by a great deal of legally and illegally exploited wildlife species, putting enormous pressure on many of them, with potentially irreversible consequences. The dramatic decline of sturgeon populations exploited for their caviar, is a good example: all 27 species are threatened and the most coveted are on the verge of extinction. We aim to identify the mechanism responsible for the continued overexploitation of sturgeon species, despite caviar's ever-increasing price and the imminent loss of these species. Here, we demonstrate consumer preference for rarity over intrinsic quality: customers tasting two caviar... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1690/version/1 |
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| Ahmad Reza Ommani; Mohammad Chizari. |
| The purpose of this research was analysis Sustainable Water Resources Management (SWRM) in agriculture of Khouzestan Province of Iran. The research method was quantitative research. Total population of experts in the study included all agricultural extension experts (N=96) of Agricultural-Jihad Organization of Khuzestan Province, Iran. Based on frequency of respondents about importance rate of supportive policies regarding SWRM in agriculture, 70.8% of respondents stated that encouraging farmers for using sustainable methods had very high importance. In reference to the frequency of respondents about extension system roles on realization of SWRM dimensions in agriculture, 52.8% of respondents stated conservation of water resources had very high importance... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/4046/version/1 |
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| Ahmim Mourad; Moali Aissa. |
| Many bats of the Rhinolophidae family are currently threatened all over the world. In Algeria they are represented by six species listed in the IUCN red list and whose hunting habits and diet are, at best, poorly known. This paper describes the diet composition of four of these species (Rhinolophus ferrumequinum, R. hipposideros, R. euryale and R. blasii) in the Bejaia and Jijel districts, and in Kabylia of the Babors region, in northern Algeria. Between March 2007 and January 2008 guano was sampled every fortnight in the different sites used by the species and preys remains identified under microscope. Results show that these Algerian Rhinolophidae prey on three groups of Arthropodes (Insects, Chilopodes and Spiders) whose frequencies vary from one... |
| Tipo: Manuscript |
Palavras-chave: Developmental Biology; Ecology. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/6822/version/1 |
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| Alan Feest; Timothy Aldred; Katrin Jedamzik. |
| The internationally accepted definition of biodiversity creates difficulty in measuring difference and change. The authors suggest that well-sampled data can be used to generate a range of numerical indices reflecting species group characteristics/functionality (Species Richness, Simposons Index, Population Density, Biomass and Species Conservation Value) that can be viewed in combination to create a picture of biodiversity quality. This overall approach has considerable advantages over the currently accepted Convention on biological Diversity definition based on the "variability" of genes, species and ecosystems, since the numerical expression of the indices allows the probability of difference between biodiversity quality trends and... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3205/version/1 |
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| Alayse, Anne-marie. |
| With the advent of deep submergence research vessels (DSRVs) biological and ecological studies of ocean deeps have made great strides. Especially these submersibles allowed to conduct physiological and biochemical experiments on benthic fauna directly on the bottom or on board with alive retrieved animals. A second great interest is the possibility to work in chaotic areas and on microenvironments. Without DSRVs most of measurements and observations obtained on hydrothermals vents would had been impossible. We will present the different equipment designed for the two French DSRVs used during the cruises conducted by the Departement "Environnement Profond" de l'IFREMER to study hydrothermal and "normal" deep-sea ecosystems. We will discuss the new devices... |
| Tipo: Text |
Palavras-chave: Oceanography; Hydrothermal springs; Ecosystems; Abyssal zone; Cruises; Ecology; Biology; Deep water; Unmanned vehicles; Manned vehicles. |
| Ano: 1990 |
URL: http://archimer.ifremer.fr/doc/1990/acte-1146.pdf |
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| Alejandro Correa Rueda; Jorge Mpodozis. |
| The current classification of the chilean representatives of the passerine family Rhinocryptidae includes eight species. Three of them contain subspecies that don’t exhibit clear differences. Moreover, differences among two lineages of _Scytalopus_ genera and two species of _Pteroptochos_ are very scarce. We propose a new methodology based on ecological and behavioural patterns in order to understand the concept of speciation in this group of birds. According to our results, we postulate that there is not a cut criteria to establish differences among three sister lineages of current classification. This way the methodology developed by us does not allow to establish divergence for a given common ancestor. Our methodology allows to establish... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Evolutionary Biology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1597/version/2 |
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| Alejandro Correa Rueda; Jorge Mpodozis. |
| The current classification of the chilean representatives of the passerine family Rhinocryptidae includes eight species. Three of them contain subspecies that don't exhibit clear differences. Moreover, differences among two lineages of _Scytalopus_ genera and two species of _Pteroptochos_ are cryptic. We propose a new methodology based on ecological and behavioural patterns in order to understand the concept of speciation in this group of birds. According to our results, we postulate that there is not a cut criteria to establish differences among three sister lineages of current classification. This way the methodology developed by us does not allow to establish divergence for a given common ancestor. Our methodology allows to establish comparison... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1597/version/1 |
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| Alejandro Correa Rueda; Jorge Mpodozis; Michel Sallaberry. |
| Eight species of Rhinocryptidae are recognized from Chile. Moreover, morphological, ecological and behavioral differences among two lineages of _Scytalopus_ and two species of _Pteroptochos_ are unclear. According to our results, there are no decisive criteria differentiating among subspecific sister taxa of _Scelorchilus albicollis_, _S. rubecula_ and _Pteroptochos megapodius_. Here we discuss the speciation of the chilean Rhinocryptidae based in their behaviour. We propose a new methodology based on ecological and behavioural patterns in order to understand the concept of speciation in this group of birds.
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| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1606/version/1 |
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| Registros recuperados: 900 | |
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