Consulta: subjectFacets:"Energy flow"
Registros recuperados: 5
Data/hora: 09/06/2024 04:07:54

Seagrass ecosystems
Provedor de dados: 13
Autores: Phillips, R. C.; Milchakova, N. A.
The seagrass ecosystem is defined as a unit of biological organization comprised of interacting biotic and abiotic components. The structural components are shelter and food and feeding pathways and biodiversity. Functional components include the rate of nutrient cycling, the rate of energy flow, and biological regulation. Healthy intact seagrass ecosystems provide services since they relate to the health, stability and well-being of the environment in which they live, but also to that of human populations.
Tipo: Journal Contribution
Palavras-chave: Seagrass; Ecosystem; Production; Nutrient cycling; Energy flow; Biological regulation; Ecosystem services; Морские травы; Экосистема; Поток энергии; Биологическая регуляция; Экосистемные услуги Ecosystems Energy flow Ecosystems Energy flow http://aims.fao.org/aos/agrovoc/c_2482 http://aims.fao.org/aos/agrovoc/c_2569.
Ano: 2003
URL: http://repository.ibss.org.ua/dspace/handle/99011/42

Relating species and community dynamics in an heavily exploited marine fish community
Provedor de dados: 5
Autores: Duplisea, Daniel; Blanchard, Fabian.
We examined the dynamics of fish species and how they relate to species assemblage coherence in the heavily exploited Georges Bank fish community. Coherence is defined as reduced temporal variability of total assemblage biomass. We assumed that a higher degree of compensation hence coherence occurs within competitively coupled species assemblages; therefore, fisheries may directly alter the dynamics of certain targeted species sizes but assemblage structure will be relatively more stable owing to compensatory interactions. Species-sizes were grouped, based on negative covariance coupling in biomass time series from survey data. Assemblages representing benthic feeders were clearly identified by this method; furthermore, the most heavily exploited...
Tipo: Text
Palavras-chave: Diversity stability; Species replacement; Energy flow; Emergent property; Thermodynamics; Goal function.
Ano: 2005
URL: http://archimer.ifremer.fr/doc/2005/publication-806.pdf

Problems in meiofauna energy-flow studies
Provedor de dados: 27
Autores: Herman, P.M.J.; Vranken, G.; Heip, C.H.R.
The direct estimation of energy flow through marine meiobenthic populations poses several difficulties, mainly relating to sampling problems. The usefulness of some indirect estimation methods is discussed. Direct production estimates and respiration measurements for three brackish water crustacean populations are given, indicating a relative constant proportion between population production and respiration.The production: assimilation ratio for these populations fluctuates between 0.3 and 0.4. This is contrasted to literature data revealing much higher production: assimilation ratios as determined in the laboratory for nematode populations. Using data on laboratory cultures of the nematode &lt;i&gt;Monhystera disjuncta&lt;/i&gt; some factors that can...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Energy flow; Meiobenthos.
Ano: 1984
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3265

Studies of the life-history and energetics of marine and brackish-water nematodes: 2. Production, respiration and food uptake by &lt;i&gt;Monhystera disjuncta&lt;/i&gt;
Provedor de dados: 27
Autores: Herman, P.M.J.; Vranken, G.
An energy budget was constructed for the marine nematode &lt;i&gt;Monhystera disjuncta&lt;/i&gt;. Respiration was measured with a modified Cartesian diver technique, in which the nematodes were kept in agar inside the diver 'head'. The relationship between respiration and body weight was: R=1.53 W&lt;sup&gt;0.75&lt;/sup&gt;. Body growth was exponential during the juvenile phase, with a growth rate equal to 0.61 d&lt;sup&gt;-1&lt;/sup&gt;. After maturation the growth rate fell to 0,17 d&lt;sup&gt;-1&lt;/sup&gt;. Food uptake was measured in experiments with radiolabeled bacteria. In one series of experiments the accumulation of radiolabel in the nematodes was followed. In a second series the decrease in labeling was followed when pre-labeled nematodes fed on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioenergetics; Brackishwater environment; Energy budget; Energy flow; Feeding; Life history; Meiobenthos; Respiration; Monhystera disjuncta; Nematoda [Nematodes].
Ano: 1988
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3146

Energy analysis of Jatropha curcas under irrigation and rainfed at the Southeast Brazilian humid subtropical
Provedor de dados: 111
Autores: Santos, Otávio Neto Almeida; Folegatti, Marcos Vinícius; Lena, Bruno Patias; Diotto, Adriano Valentim; Francisco, João Paulo; Romanelli, Thiago Libório.
Jatropha (Jatropha curcas L.) is an oil seed species, adaptive to different climate and soil conditions. It is known due to its high-oil-content seed, being an option for biodiesel production and presenting competitive yields under irrigated condition. This study was developed in an experimental area located in a humid subtropical region of Brazil and the objective was to evaluate Jatropha’s energy balance under irrigation and rainfed condition during the first four years of its cycle. First, the material flows were determined, which supported the calculation of, energy input and output flows were obtained. These were used to determine the energy indices: energy balance (EB), and energy return on investment (EROI) for both conditions. Fertilizers had the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biofuel; Energy efficiency; Sustainability; Energy flow.
Ano: 2018
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4597