Gotowa bibliografia na temat „Agriforestry”

Hankehaavi on palvelu, jolla voidaan etsiä tietoa julkisin varoin rahoitetuista tutkimushankkeista. Se on kätevä työkalu, jonka avulla tiedontarvitsija löytää nopeasti yhtä aikaa maatalous-, maaseutu-, eläinlääke-tiede-, elintarvike-, ravitsemus-, kotitalous-, kuluttaja-, ympäristö-, metsä- ja puualojen hanketietoja. Hankehaavi avautuu osoitteessa www.hankehaavi.fiHankehaavi haravoi verkossa julkaistua hanketietoa laitosten rekistereistä tai www-sivuilta ja kerää tiedot yhteen hakemistoon, josta haku on helppoa ja nopeaa. Tiedonhakija voi etsiä tietoa esim. sanalla bioenergia ja saa saaliikseen kaikki bioenergiaan liittyvien hankkeiden tiedot mukana olevista eri organisaatioista yhdellä kertaa. Hankehaaviin on koottu nyt noin 4000 suomenkielistä tutkimushankekuvausta.Hankehaavi on kehitetty maa- ja metsätalousministeriön, sen hallinnonalan organisaatioiden ja Viikin tiedekirjaston välisessä, jo vuodesta 1993 alkaneessa Matri-yhteistyössä. Alkuvaiheessa Hankehaavissa ovat mukana Elintarviketurvallisuusvirasto Evira, Geodeettinen laitos, Metsäntutkimuslaitos, Maa- ja elintarviketalouden tutkimuskeskus, Riista- ja kalatalouden tutkimuslaitos, Suomen ympäristökeskus, Helsingin yliopiston tiedekuntia sekä maa- ja metsätalousministeriö.Hankehaavi on osa tutkimustiedon saatavuutta ja käytettävyyttä edistävien tietotyökalujen palettia. Viikin tiedekirjaston tuottamat eViikki julkaisuviitetietokanta ja DViikki avoin julkaisuarkisto ovat välineitä Hankehaavista löytyvien tutkimushankkeiden tuloksina tuotettujen julkaisujen löytämiseen. Viikin tiedekirjaston tesaurusmuotoinen asiasanasto Agriforest on puolestaan väline niin julkaisujen kuin hankkeiden löytyvyyden edistämiseen. Se on laajin suomalainen maatalous-, metsä-, puu-, elintarvike-, kotitalous-, kuluttaja- ja ympäristöalojen asiasanasto ja soveltuu siten mainiosti näiden alojen tietorekisterien ja muiden hakemistojen kuvailuun.Hankehaavi ei vielä alkuvaiheessa ole saanut pyydykseensä kaikkea sitä tietoa mitä tavoitellaan, vaikka hyvä pohja on luotukin. Tietoja puuttuu vielä hankkeiden aloitus- ja päättymisajankohdista, yhteistyötahoista ja rahoittajista. Löytyvyyttä varmistavia asiasanojakin olisi syytä tutkimushankekuvauksiin lisätä. Jatkokehittelyn tavoitteena on, että tutkija voisi yhdellä tallennuksella tuottaa sellaisen rakenteisen tutkimushankekuvauksen, joka samalla kertaa palvelisi omaa organisaatiota, yhteistyökumppaneita, rahoittajia ja tiedotusfoorumeita.

We report the first comprehensive analysis of the effects of elevated [CO2] on gene expression in source leaf and stem sink tissues in woody plants. We have taken advantage of coppiced Populus deltoides (Bartr.) stands grown for 3 years under three different and constant elevated [CO2] in the agriforest mesocosms of Biosphere 2. Leaf area per tree was doubled by elevated [CO2] but although growth at 800 v. 400 µmol mol–1 CO2 resulted in a significant increase in stem biomass, growth was not stimulated at 1200 µmol mol–1 CO2. Growth under elevated [CO2] also resulted in significant increases in stem wood density. Analysis of expression data for the 13 490 clones present on POP1 microarrays revealed 95 and 277 [CO2]-responsive clones in leaves and stems respectively, with the response being stronger at 1200 µmol mol–1. When these [CO2]-responsive genes were assigned to functional categories, metabolism-related genes were the most responsive to elevated [CO2]. However within this category, expression of genes relating to bioenergetic processes was unchanged in leaves whereas the expression of genes for storage proteins and of those involved in control of wall expansion was enhanced. In contrast to leaves, the genes up-regulated in stems under elevated [CO2] were primarily enzymes responsible for lignin formation and polymerisation or ethylene response factors, also known to induce lignin biosynthesis. Concomitant with this enhancement of lignin biosynthesis in stems, there was a pronounced repression of genes related to cell wall formation and cell growth. These changes in gene expression have clear consequences for long-term carbon sequestration, reducing the carbon-fertilisation effect, and the potential for increased lignification may negatively impact on future wood quality for timber and paper production.

Prospects for the establishment of joint-ventured agribusiness in developing countries are a function of international agreements, local risk conditions, business networks, and banking systems that are willing to support the innovative transfer, protection, assessment, and commercialization of biotechnology. The integration of biotechnology will occur only if truly convincing practices emerge that enhance biodiversity and the competitiveness of sustainable production, utilization, and marketing cycles. Integration also depends on agreements on intellectual property rights, plant protection, trade and tariffs, price stabilization, and non-trade-distorting policies. These policies deal with broad issues in research, pest and disease control, environmental quality, germplasm conservation, resource retirement programs, and even with crop and disaster insurance. Measures derived from these policies will apply to novel processes and to organisms that have been genetically engineered and approved for release into the environment. For developing countries, much more attention will have to be paid to biological diversity and sustainable balances among intercropped agriforest and horticultural production systems. Balances should be compatible with regional and local customs and practices before genetically engineered “green goods and services” are introduced in the marketplace. Recombinant DNA technologies are currently better-suited to deal on a “gene-by-gene” basis, with commodity surpluses and material conversions involving more concentrated and industrialized processes than with field plantations of genetically engineered, complex, and long-lived crops that may require considerable adaptive plasticity. In most countries with developing economies, the integration of recombinant DNA technology represents a “special problematique” involving politico- and socioeconomic and environmental factors. Barriers to transfer and integration may involve evolving international agreements, public acceptance, resource over-exploitation, environmental degradation, rapid insect and disease resistance, contaminated water and food supplies, reduced quality of life, labor quality, corruption, crime, farmers' rights, germplasm conservation, and lack of protection of intellectual property, among other factors. Hence, the timing and mode of transferring biotechnology needs considerable impact assessment on a case-by-case basis.

This thesis presents the findings of an investigation of the spatial and temporal distribution of soil macrofauna at multiple scales within smallholder agriforestry fields in a remote, mountainous area of western Honduras. Since 1990, smallholder farmers in the study area have switched from traditional slash-and-burn agriculture to a form of slash-and-mulch agriforestry based on cultivating maize, beans and sorghum amongst dispersed trees. The principal objective was to examine the influence of the slash-and-mulch agricultural system on soil macrofauna abundance, biomass and community composition, and relate soil macrofauna distribution patterns to environmental variables. The initial stage of the research comprised transect-based sampling of soil macrofauna and biophysical variables in four common land uses of the study area. All four land uses (secondary forest, young milpa (agriforestry), mature milpa, and pasture) supported abundant, diverse and heterogeneous soil macrofauna communities, with few notable differences in soil macrofauna distribution among land uses. The most abundant soil macrofauna taxa were termites, ants, earthworms and beetles. Of the 'explanatory' environmental variables that were measured (including land use and selected soil properties, vegetation characteristics and topographic variables), those that had the strongest relationships with soil macrofauna abundance were land use, tree density and soil organic matter content. The second stage of the research was spatially-orientated and used stratified sampling based on within-field differences in farmer-defined soil type, as well as grid-based sampling of soil macrofauna surface activity. There was substantial within-field variation in soil type and topography, which was related to distribution patterns of at least one agriculturally-important soil macrofauna taxon. Earthworm activity was higher in areas of fertile soil and lower slope positions. At a finer scale, there was a positive spatial correlation between tree distribution and earthworm casting activity. The final phase situated the biophysical research in the local socio-economic context through participant observation and interviews with farmers. The results of the three phases of the study were incorporated into an original conceptual model of the relationships among soil macrofauna and environmental variables in the study area across multiple spatial scales and along a chronosequence of land use changes. Specific pointers are provided for further research on the role of soil fauna in influencing soil structure, nutrient cycling and pest species abundance, and for further investigating local knowledge and the socio-economic and cultural drivers of land use change.

Made available in DSpace on 2014-12-17T14:10:19Z (GMT). No. of bitstreams: 1 MarcosPGP_DISSERT_1-46.pdf: 4525391 bytes, checksum: cc4ce7722ce2492ebd954c9d1dfad7a8 (MD5) Previous issue date: 2010-04-28
Sandflies stand out as important vectors of leishmaniasis. The females need to ingest blood meals, enabling them to transmit protozoa of the genus Leishmania, which may give rise to visceral leishmaniasis (VL) or American tegumentary leishmaniasis (ATL), in addition to transmitting other parasites. Leishmaniasis are important infirmities, distributed worldwide, whose infection results from the interaction of reservoir animals, the vector insect, parasitic protozoa and the healthy host. In the state of Rio Grande do Norte (RN), Brazil, these insects are important transmitters of VL, which usually presents in the most serious form. It occurs mainly in metropolitan areas, with the dog as its main reservoir and Lutzomyia longipalpis as the vector. ATL is most present in the highland areas of the state. In addition to hematophagia, engaged in by the females, both sexes need to ingest carbohydrates, which are essential to the sand flies energy requirements and may interfere in the development of Leishmania. The aim of this study was to determine the occurrence and abundance of sand flies in different environments on the farm belonging to the Empresa de Pesquisas Agropecu?rias do RN (Institute of Agricultural Research of RN), in the municipality of Parnamirim, in order to relate this occurrence with climatological and biological references and eating habits. Three consecutive monthly collections were carried out with CDC traps in a fragment of the Atlantic Forest, in a residence, on a goat breeding farm and on cashew, dwarf and giant coconut, mango, banana, eucalyptus, acacia and bean plantations. A total of 1241 sandflies from eight species (Lutzomyia evandroi, Lutzomyia longipalpis, Lutzomyia shannoni, Lutzomyia sordellii Lutzomyia walkeri, Lutzomyia wellcomei, Lutzomyia whitmani, and Lutzomyia intermedia) were collected, most in the forest environment. L. longipalpis, the main VL transmitter, was confirmed as a species adapted to anthropic environments, whereas others such as L. wellcomei, the vector of ATL, occurred predominantly in forests. Carbohydrate characterization of the sand flies and plants of the region demonstrated that a number of exotic plants such as hay and eucalyptus may play some role in the adaptation of these species to modified environments. Breeding in laboratory showed a mean biological cycle of 53.5 days from egg to adulthood for L. shannoni and the possibility of diapause behavior in L. wellcomei. This study serves as a source of information that may contribute to the epidemiological vigilance of tegumentary and visceral leishmaniasis in the state, given that it analyzes the bioecology of transmitting species, as well as their potential to adapt to new environments
Os flebotom?neos se destacam como importantes transmissores das leishmanioses. As f?meas necessitam realizar repasto sangu?neo, o que as possibilita veicular protozo?rios do g?nero Leishmania, que podem originar a leishmaniose visceral (LV) ou a leishmaniose tegumentar americana (LTA), al?m de transmitirem outros parasitos. As leishmanioses s?o enfermidades de ampla import?ncia e distribui??o mundial, cuja infec??o ? conseq?ente da intera??o dos animais reservat?rios com o inseto vetor, o protozo?rio parasito e o hospedeiro sadio. No Rio Grande do Norte (RN) esses insetos s?o importantes transmissores da LV, que geralmente se apresenta de forma mais grave e ocorre principalmente na regi?o metropolitana, tendo o c?o como principal reservat?rio, e Lutzomyia longipalpis como vetor. A LTA est? mais presente nas ?reas serranas do estado. Al?m da hematofagia, exercida pelas f?meas, ambos os sexos necessitam ingerir carboidratos, que s?o essenciais para as necessidades energ?ticas dos flebotom?neos e podem interferir no desenvolvimento da Leishmania. O objetivo desse estudo foi levantar a ocorr?ncia e abund?ncia de flebotom?neos nos diversos ambientes da fazenda da Empresa de Pesquisas Agropecu?rias do RN, no Munic?pio de Parnamirim, buscando relacionar essa ocorr?ncia com referenciais climatol?gicos, biol?gicos e h?bitos alimentares. Foram realizadas 03 coletas consecutivas mensais com armadilhas CDC em um fragmento de Mata Atl?ntica, em uma resid?ncia, e em planta??es de cajueiro, de coqueiro an?o e gigante, de mangueira, de bananeira, de eucalipto, ac?cia, feij?o e em cria??o de caprinos. Foram coletados 1241 flebotom?neos de oito esp?cies, Lutzomyia evandroi, Lutzomyia longipalpis, Lutzomyia shannoni, Lutzomyia sordellii Lutzomyia walkeri, Lutzomyia wellcomei, Lutzomyia whitmani, e Lutzomyia intermedia, sendo a maioria destes no ambiente de mata. L. longipalpis, principal esp?cie transmissora de LV, se confirmou como esp?cie adaptada a ambientes antr?picos, enquanto outras como L. wellcomei, vetora de LTA, se mostrou predominantemente silvestre. Foi feita caracteriza??o de carboidratos em flebotom?neos e vegetais da regi?o, visando relacion?-los, o que demonstrou que algumas plantas ex?ticas como capim e eucalipto podem ter algum papel no processo de adapta??o dessas esp?cies a ambientes modificados. Atrav?s da cria??o em laborat?rio, observou-se para L. shannoni ciclo biol?gico m?dio de 53,5 dias de ovo a adulto e ainda a possibilidade de diapausa em L. wellcomei. Esse estudo constitui uma fonte de informa??es que poder? contribuir com a vigil?ncia epidemiol?gica das leishmanioses tegumentar e visceral no Estado, uma vez que analisa a bioecologia das esp?cies transmissoras, assim como seu potencial de adapta??o a novos ambientes