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排序方式: 共有107条查询结果,搜索用时 15 毫秒
51.
Kuhn Felipe Gustavo Berghahn Emilio Marder Munique Konrad Odorico Sperotto Raul Antonio Granada Camille Eichelberger 《Journal of Material Cycles and Waste Management》2021,23(2):717-726
Journal of Material Cycles and Waste Management - Hulls are considered residues from rice production, and due to its low commercial value, there is little interest in developing biotechnological... 相似文献
52.
Hugh?DrummondEmail author Cristina?Rodríguez Adriana?Vallarino Claudia?Valderrábano Gabriela?Rogel Emilio?Tobón 《Behavioral ecology and sociobiology》2003,53(5):287-296
According to the desperado sibling hypothesis, chicks of obligately siblicidal species kill their junior broodmates as early as possible because junior broodmates face dire ecological prospects and are consequently predisposed to aggressively overthrow elder broodmates by all-out aggression. The agonistic behavior of junior chicks is virtually unknown because they die so young. We investigated the agonistic behavior of hypothetical desperados by fostering junior brown boobies (Sula leucogaster, an obligately siblicidal species) into nests of the blue-footed booby (S. nebouxii, a facultatively siblicidal species) containing an older singleton blue-foot chick. Controls were junior blue-footed boobies fostered into the same situation. Junior brown boobies were 7 times more aggressive than controls and most of them dominated their elder and larger nestmates. Four of nine brown booby juniors showed relentless aggression, delivering up to 711 pecks, bites and pushes (including "expulsion pushes") per hour, thereby overwhelming nestmates 90% heavier and permanently expelling one of them from the nest. Similarly, in natural broods of two surviving brown booby chicks, the losing chick was 13 times as aggressive as blue-foot subordinates, up to at least age 7 weeks. Contrast of the two species of booby suggests the evolution of agonistic roles within broods may be partly driven by selection on potential victims to express a level and type of aggressiveness appropriate to their status-related ecological prospects. 相似文献
53.
Pedde Simona Kroeze Carolien Mayorga Emilio Seitzinger Sybil Putnam 《Regional Environmental Change》2017,17(8):2495-2506
Regional Environmental Change - We model future trends in river export of nutrients to the Bay of Bengal, and the sources of this pollution. We focus on total nitrogen (TN), total phosphorus (TP),... 相似文献
54.
Carmen Rizzo Alessandro Ciro Rappazzo Luigi Michau Emilio De Domenico Carlos Rocher Antonio Camacho Angelina Lo Giudice 《环境科学学报(英文版)》2018,30(5):115-126
Joostella strains are emerging candidates for biosurfactant production. Here such ability was analyzed for Joostella strain A8 in comparison with Alcanivorax strain A53 and Pseudomonas strain A6, all previously isolated from hydrocarbon enrichment cultures made of polychaete homogenates. In pure cultures Joostella sp. A8 showed the highest stable emulsion percentage(78.33%), hydrophobicity rate(62.67%), and an optimal surface tension reduction during growth in mineral medium supplemented with diesel oil(reduction of about 12 mN/m), thus proving to be highly competitive with Alcanivorax and Pseudomonas strains. During growth in pure culture different level of biodegradation were detected for Alcanivorax strain A53(52.7%),Pseudomonas strain A6(38.2%) and Joostella strain A8(26.8%). When growing in consortia,isolates achieved similar abundance values, with the best efficiency that was observed for the Joostella-Pseudomonas co-culture. Gas-chromatographic analysis revealed an increase in the biodegradation efficiency in co-cultures(about 90%), suggesting that the contemporary action of different bacterial species could improve the process. Results were useful to compare the efficiencies of well-known biosurfactant producers(i.e. Pseudomonas and Alcanivorax representatives) with a still unknown biosurfactant producer, i.e. Joostella, and to confirm them as optimal biosurfactant-producing candidates. 相似文献
55.
Cuoco Emilio Viaroli Stefano Paolucci Vittorio Mazza Roberto Tedesco Dario 《Environmental geochemistry and health》2022,44(7):2065-2082
Environmental Geochemistry and Health - A theoretical pattern for Fe and As co-precipitation was tested directly in a groundwater natural system. Several monitoring wells were sampled to identify... 相似文献
56.
In a previous paper, we reported that juvenile barn swallows (Hirundo rustica) trapped during the autumn migratory season and tested in modified Emlen funnels under overcast conditions can use magnetic
information for compass orientation, although they did not orient toward the expected migratory direction. To further investigate
this behaviour, in the present paper, we report the results of two series of displacement experiments performed on juvenile
barn swallows belonging to two different roost sites [Massaciuccoli Lake (ML) and Terzo Cavone (TC)] and tested using the
same protocol as that previously adopted. On the whole, the outcome of the ML and TC experiments was quite different with
respect to (a) the degree of bird activity within the funnel (substantially lower for TC) and (b) the effect of the experimental
displacement on the directional preferences of the tested subjects (not detectable in TC, while evident in ML swallows). Taken
together, these results suggest that migrating swallows could react differently to the experimental tests depending on the
roost site where they were caught. Indeed, TC swallows, trapped in southern Italy, close to the seacoast, and characterized
by fairly large amounts of fat stores, mainly broke off their migratory activity or reoriented their directional preferences
toward inland sites, possibly in search of more profitable habitats. On the other hand, ML swallows, trapped about 660 km
to the north and characterized by lower amounts of fat stores, apparently tried to compensate for the experimental displacement.
相似文献
N. Emilio BaldacciniEmail: |
57.
Development of a framework for fire risk assessment using remote sensing and geographic information system technologies 总被引:10,自引:0,他引:10
Emilio Chuvieco Inmaculada Aguado Héctor Nieto M. Pilar Martín Lara Vilar Susana Martín Juan de la Riva Francisco Rodríguez Miguel A. Herrera 《Ecological modelling》2010,221(1):46-58
Forest fires play a critical role in landscape transformation, vegetation succession, soil degradation and air quality. Improvements in fire risk estimation are vital to reduce the negative impacts of fire, either by lessen burn severity or intensity through fuel management, or by aiding the natural vegetation recovery using post-fire treatments. This paper presents the methods to generate the input variables and the risk integration developed within the Firemap project (funded under the Spanish Ministry of Science and Technology) to map wildland fire risk for several regions of Spain. After defining the conceptual scheme for fire risk assessment, the paper describes the methods used to generate the risk parameters, and presents proposals for their integration into synthetic risk indices. The generation of the input variables was based on an extensive use of geographic information system and remote sensing technologies, since the project was intended to provide a spatial and temporal assessment of risk conditions. All variables were mapped at 1 km2 spatial resolution, and were integrated into a web-mapping service system. This service was active in the summer of 2007 for semi-operational testing of end-users. The paper also presents the first validation results of the danger index, by comparing temporal trends of different danger components and fire occurrence in the different study regions. 相似文献
58.
Galdeano-Gómez E Céspedes-Lorente J Martínez-Del-Río J 《Journal of environmental management》2008,88(4):1552-1561
This study investigates the effect of environmental investment and related spillover effects on productivity in the agricultural sector by using a panel data of horticultural firms in Andalusia (Southern Spain). The results indicate a positive relationship between firm investment in environmental practices and productivity improvement, also showing the presence of positive environmental spillovers. In a second-stage of analysis, the incidence of environmental factors in firm specific individual technical efficiency is estimated. This analysis also shows the link between environmental knowledge diffusion and horticultural firms' performance. 相似文献
59.
Emilio Galdeano-Gómez Juan Carlos Pérez-Mesa Ángeles Godoy-Durán 《Sustainability Science》2016,11(2):349-362
The social pillar has often been treated as an ‘add on’ in sustainable development studies, and analyses of its ‘proactivity’ in economic, environmental, and social transformations to sustainability outcomes are scant. The present paper looks at the social dimension as a key driver of sustainable development. Social factors in the farming system in southeast Spain are analyzed to show how family farms and their networks can integrate socio-economic and eco-social goals, promoting the generation of synergies and trade-offs between the dimensions of sustainability. This study contributes to existing debate on the role of family farms in the framework of European rural development. 相似文献
60.