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| Registros recuperados: 11 | |
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| Fontanier, Christophe; Mamo, Briony; Toucanne, Samuel; Bayon, Germain; Schmidt, Sabine; Deflandre, Bruno; Dennielou, Bernard; Jouet, Gwenael; Garnier, Eline; Sakai, Saburo; Lamas, Ruth Martinez; Duros, Pauline; Toyofuku, Takashi; Sale, Aurelien; Belleney, Deborah; Bichon, Sabrina; Boissier, Audrey; Cheron, Sandrine; Pitel, Mathilde; Roubi, Angelique; Rovere, Mickael; Gremare, Antoine; Dupre, Stephanie; Jorry, Stephan. |
| In this short communication, we present a multidisciplinaty study of sedimentary records collected from a deep-sea interfluve proximal to the mouths of major northwestern Madagascan rivers. For the last 60 years, the seafloor has been repeatedly disturbed by the deposition of organic rich, tropical, terrestrial sediments causing marked reductions in benthic biodiversity. Increased soil erosion due to local land-use, deforestation and intensifying tropical cyclones are potential causes for this sedimentary budget and biodiversity shift. Our marine sedimentary records indicate that until now, these conditions have not occurred within the region for at least 20,000 years. |
| Tipo: Text |
Palavras-chave: Multidisciplinary study; Benthic foraminifera; Land-use; Tropical cyclones. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00413/52488/53276.pdf |
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| Condie, Scott A.; Hayes, Donna; Fulton, Elizabeth A.; Savina, Marie. |
| The Clarence River Estuary is the largest estuary in southeast Australia, with an extensive floodplain encompassing multiple river channels and a large coastal lagoon. It is the focus of major commercial and recreational fisheries and there is pressure to divert its freshwater inputs for agricultural and domestic uses. We used a spatial biogeochemical model to simulate the variability and evolution of this system on timescales from days to decades over the past half century. Like most tropical and subtropical estuaries, the Clarence River Estuary is strongly influenced by river discharge, sediment and nutrient loads. Given the high nutrient loads arriving from the upper catchment, plankton biomasses in the model were typically limited by flushing through... |
| Tipo: Text |
Palavras-chave: Coastal lagoon; Flushing; Land-use; Climate impacts; Nutrients; Phytoplankton; Zooplankton. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00175/28673/27113.pdf |
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| Jyotishi, A.. |
| Swidden being a widespread form of land use in the tropics comprehensively defining it become a difficult task. Its characteristics embrace different types of topography, demographic feature, ethnic and ecological diversities. It also varies in terms of cropping pattern, frequency of land use, tools and methods of practice. It is argued that the institutions governing swidden are static in nature and do not adapt to the requirements of the changing ecological and social needs. This necessitates understanding what characterise institutions in a traditional swiddening society, and hence, changes in these characteristics to appreciate whether swidden is a static form of agriculture or changing over the time and space. There are a few aspects, which underscore... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Swidden; Institution; Land-use; Property-rights; Market-integration; Orissa; Farm Management; O13; N55; Q10; Z13. |
| Ano: 2006 |
URL: http://purl.umn.edu/25763 |
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| Boere, Esther; Peerlings, Jack H.M.; Reinhard, Stijn; Kuhlman, Tom; Heijman, Wim J.M.. |
| Volatile output prices lead to a fluctuating shadow price (profitability) of agricultural land, and therefore may impact land use decisions in case of risk-averse behaviour. In this paper we assess the effect of volatile agricultural output prices on agricultural land-use change over the past decade in the Netherlands. Using regional data from 2000 through 2009, the number of hectares of land for 10 land uses was calculated. To determine the joint distribution of agricultural activities, hectares of land for each land use were converted to land share equations. Land share equations were estimated to determine the contribution of increased price volatility to land use change. Results show that larger volatility affects land shares negatively. Producer’s... |
| Tipo: Presentation |
Palavras-chave: Land-use; Risk; Price volatility; Risk and Uncertainty; Q1; D8. |
| Ano: 2012 |
URL: http://purl.umn.edu/122472 |
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| Hubert, Marie-Helene; Moreaux, Michel. |
| In order to assess the future world food demand/supply balance for the next century, in relation to the land uses, we develop a model in which the society has to supply two types of food demand, namely, processed crop products and meat and dairy products. From the supply side, the society can resort to different classes of land. Each class of land can be allocated wholly or partially either to crop cultivation or to pasture or last to be lain fallow. Primary crop production can be transformed either into processed crop products to satisfy final needs, or into intermediate livestock products used as inputs within the intensive industrial farming system. The livestock products can also be obtained from the extensive grazing system. The increase in world... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Aggregate supply and demand analysis; Food prices; Land-rent; Land-use; Land Economics/Use; Q11; Q15; Q24. |
| Ano: 2005 |
URL: http://purl.umn.edu/24627 |
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| Cardoso,Elke Jurandy Bran Nogueira; Vasconcellos,Rafael Leandro Figueiredo; Bini,Daniel; Miyauchi,Marina Yumi Horta; Santos,Cristiane Alcantara dos; Alves,Paulo Roger Lopes; Paula,Alessandra Monteiro de; Nakatani,André Shigueyoshi; Pereira,Jamil de Moraes; Nogueira,Marco Antonio. |
| Soil Health refers to the ecological equilibrium and the functionality of a soil and its capacity to maintain a well balanced ecosystem with high biodiversity above and below surface, and productivity. To understand and use soil health as a tool for sustainability, physical, chemical, and biological properties must be employed to verify which respond to the soil use and management within a desired timescale. Attributes with a rapid response to natural or anthropogenic actions are considered good indicators of soil health. Among the physical indicators, soil texture, aggregation, moisture, porosity, and bulk density have been used, while among chemical indicators total C and N, mineral nutrients, organic matter, cation exchange capacity, among others are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Land-use; Microbial community; Soil fauna; Soil quality; Sustainability. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000400009 |
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| Registros recuperados: 11 | |
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