Climate Change and Knowledge Communities

19 p.

Recasting the Net: Defining a Gender Agenda for Sustaining Life and Livelihoods in Fishing Communities

Thirty-nine participants from 18 countries, including women fishworkers, representatives of fishworker organizations and NGOs, activists and researchers, met at Mahabalipuram, India, during 7-10 July 2010, to discuss the theme “Recasting the Net: Defining a Gender Agenda for Sustaining Life and Livelihoods in Fishing Communities”. The workshop was meant to reflect on what needs to be done to develop a ‘gender agenda’ for sustaining life and livelihoods in fisheries. It was also organized against the backdrop of the growing international recognition of small-scale fisheries and efforts to enhance their contribution to food security and poverty alleviation, as evidenced in the deliberations of the the Committee on Fisheries (COFI) of the Food and Agriculture Organization of the United Nations (FAO). This publication—the proceedings of the Mahabalipuram workshop—will be useful for fishworker organizations, gender activists, researchers, policymakers, fish farmers, members of civil society and anyone interested in gender, fisheries and livelihoods. (PDF contains 89 pages)

The influence of global warming on freshwater plankton communities in Britain

The likely response of freshwater plankton to the direct and indirect effects of sustained global warming are summarized. The increase in CO2 posited by climatologists will have a direct effect on many biological processes, and an even more important indirect effect on the global climate. Lake plankton populations are relatively well buffered against sudden fluctuations in temperature but can react in unexpected ways to seasonal changes in the wind speed, with effects on seasonal growth and succession of plankton. The direct

Fish communities and fisheries in Wales's National Nature Reserves: a review

Wales is important for fish conservation in Britain. In much of Wales, atchments are small (median catchment size = 121 km2 ) and frequently eparated by areas of upland (> 600 m altitude), creating a highly agmented habitat for freshwater fish. Consequently, fish communities onsist mainly of diadromous species such as trout, eel and sticklebacks hat were able to recolonise freshwaters via the sea following the retreat of he ice sheets ca. 10 000 years BP. This review aims to (i) update the former work of Lyle and Maitland, taking into account new National Nature Reserves (NNRs)and additional data collected since 1991; (ii) assess the different fish communities represented on Welsh NNRs with respect to their naturalness; (iii) examine the use of NNRs for angling; (iv) evaluate opportunities for expanding the NNR series to conserve fish populations of conservation importance. The paper provides a table of freshwater fish occurrence by water body in Wales.

Changes in Fish Communities in the Upper Patuxent River from 1966 to 1977

Ten year comparison of fish survey's with respect to diversity evenness and composition of fish communities. The upper Patuxent River was divided into Piedmont Plateau and Coastal Plain regions, not only for geographical purposes, but also because of the clustering of sewage treatment plants in the Coastal Plain region. In the Piedmont Plateau region, the fish species diversity changed very little from 1966 to 1977 ( Little Patuxent -- 2.82 to 2.66; Middle Patuxent -- 2.86 to 2.83; and main stem -- 2.46 to 2.63), except in a section of Little Patuxent River at and below the City of Columbia where the species diversity index showed a significant reduction from 2.97 to 1.99, and in a section of the main stem Patuxent River immediately downstream from the Brighton Dam of the Triadelphia Reservoir where the index increased significantly from 1.66 to 3.20. In the Coastal Plain region, a significant reduction in the fish species diversity index occurred between 1966 and 1977 below the two sewage treatment plant outfalls : Savage -- 2.69 to 0 and Patuxent-Crofton -- 3.06 to 1.33. Also, the substantial reduction in the species diversity index which had already occurred in 1966 below the six other plant: outfalls of Fort Meade No. I, Fort Meade No. 2, Maryland House of Correction, Maryland City , Parkway and Bowie, remained depressed in 1977. On the other hand, below the Horsepen Sewage Treatment Plant (a tertiary plant practicing dechlorination) the species diversity index increased from 1.91 to 2.8. (PDF contains 48 pages)

Physical, Metabolic, and Energetic Investigations of Methane-Metabolizing Microbial Communities

Understanding the roles of microorganisms in environmental settings by linking phylogenetic identity to metabolic function is a key challenge in delineating their broad-scale impact and functional diversity throughout the biosphere. This work addresses and extends such questions in the context of marine methane seeps, which represent globally relevant conduits for an important greenhouse gas. Through the application and development of a range of culture-independent tools, novel habitats for methanotrophic microbial communities were identified, established settings were characterized in new ways, and potential past conditions amenable to methane-based metabolism were proposed. Biomass abundance and metabolic activity measures – both catabolic and anabolic – demonstrated that authigenic carbonates associated with seep environments retain methanotrophic activity, not only within high-flow seep settings but also in adjacent locations exhibiting no visual evidence of chemosynthetic communities. Across this newly extended habitat, microbial diversity surveys revealed archaeal assemblages that were shaped primarily by seepage activity level and bacterial assemblages influenced more substantially by physical substrate type. In order to reliably measure methane consumption rates in these and other methanotrophic settings, a novel method was developed that traces deuterium atoms from the methane substrate into aqueous medium and uses empirically established scaling factors linked to radiotracer rate techniques to arrive at absolute methane consumption values. Stable isotope probing metaproteomic investigations exposed an array of functional diversity both within and beyond methane oxidation- and sulfate reduction-linked metabolisms, identifying components of each proposed enzyme in both pathways. A core set of commonly occurring unannotated protein products was identified as promising targets for future biochemical investigation. Physicochemical and energetic principles governing anaerobic methane oxidation were incorporated into a reaction transport model that was applied to putative settings on ancient Mars. Many conditions enabled exergonic model reactions, marking the metabolism and its attendant biomarkers as potentially promising targets for future astrobiological investigations. This set of inter-related investigations targeting methane metabolism extends the known and potential habitat of methanotrophic microbial communities and provides a more detailed understanding of their activity and functional diversity.

Invertebrate communities in northern Lake Victoria, with reference to their potential for fishery production

The zooplankton and macrobenthic communities of Lake Victoria were sampled by lift net and Ponar grab, respectively. The zooplankton comprised copepods and cladocerans, rotifers and aquatic insect larvae. Most taxa exhibited wide distribution in the lake, with the exception of rotifers which were rare in deep offshore waters. The main components in the macro-benthos were chaoborid and chironomid larvae and molluscs. Caridina nilotica (Roux) and other groups were rare in the samples. Zooplankton density ranged from 100000 or more to 4 million ind. m2 and increased from the shallow inshore to deep offshore waters. Numerical dominance of cyclopoids and nauplius larvae was a common feature at all stations sampled. Most macrobenthic taxa were also widely distributed, although chaoborid and chironomid larvae were rare in the samples. Rastrineobola argentea (Pellegrin) and larval Lates niloticus (L.) ate mainly cyclopoid copepods, while cichlids showed a strong preference for adult insects. High ecological stability of the cyclopoids, and the zooplankton community in general, despite radical ecosystem changes in recent years, coupled with what appears to be high predation pressure, offers good prospects for the pelagic fishery in the lake.

The communities of running water in Cumbria

For conservations of nature to be effective. there must be an understanding of what is present to be conserved. Thus in order to conserve the communites of the Cumbrian rivers, there must first be surveys to determine the spp present and their relative numbers. This has been carried out for many years, by a number of workers. It has been shown that the communities present are influenced by the substratum, the flow, the chemicals present, water temp and predation. Findings of the work on the River Lune were given at a seminar on the rivers of north-west Europe, held at Amiens in November, 1975. The proceedings of the seminar are to appear in special numbers of Bulletin francais de Pisciculure.

The classification and prediction of macroinvertebrate communities in British rivers

This article describes the progress of the River Communities Project which commenced in 1977. This project aimed to develop a sensitive and practical system for river site classification using macroinvertebrates as an objective means of appraising the status of British rivers. The relationship between physical and chemical features of sites and their biological communities were examined. Sampling was undertaken on 41 British rivers. Ordination techniques were used to analyze data and the sites were classified into 16 groups using multiple discrimination analysis. The potential for using the environmental data to predict to which group a site belonged and the fauna likely to be present was investigated.

The effects of stress on benthic algal communities

The effects of stress on both microalgal and macroalgal communities are considered. On one hand the contrasting approaches of studies of these two communities reflect intrinsic differences in plant size, longevity and ease of handling. On the other hand they reveal that biological monitoring of the potentially deleterious effects of man's activities has focused largely on freshwater environments in which macroalgae only occasionally dominate. Large conspicuous plants can be readily investigated as individuals, whereas it is virtually impossible to trace effects of stress on an individual cell of a vegetatively-reproducing microalga; a population approach is almost inevitably necessary. However, rapid turnover rates, a spectrum of ecological characteristics distributed between many taxa, and the potential for statistical analysis, have facilitated the use of microalgae in environmental impact studies. Failure to extend such investigations into marine systems rests as much on man's ability to ignore environmental deterioration until it affects his quality of life as on the visual dominance of seaweeds around our coasts. However, large gaps remain in our knowledge of both large and small algae; some reported community changes over time are suspect, and the causes of even blatant changes are not always apparent.

Use of macroinvertebrate communities to detect environmental stress in running waters

This paper presents an account of some current uses of RIVPACS (River Invertebrate Prediction and Classification System), a software package developed by the Institute of Freshwater Ecology (UK). Background information is also given on the unique data-set on which the system is based. Before discussing RIVPACS, we consider the range of environmental stresses encountered in flowing-water systems and some of the ways in which stresses may affect macroinvertebrate communities. The wide application and relevance of the RIVPACS approach was recognised when it was chosen as the biological method for use throughout the UK in the 1990 River Quality Survey (RQS). In the concluding section we list some lessons learnt both from the 1990 survey and from our own testing exercise, and we outline current developments which will lead to a new version of RIVPACS for use in the 1995 RQS.

Liberdade e identidade: uma abordagem filosófica acerca da proteção à diversidade cultural nas democracias liberais

O presente trabalho tem como objetivo analisar os conceitos de liberdade e identidade através da proposta de um "liberalismo cultural", apresentada pelo filósofo canadense Will Kymlicka, tal como defendida em suas obras Multicultural Citizenship: A Liberal Theory of Minority Rights (1995), Politics in the Vernacular: Nationalism, Multiculturalism and Citizenship (2001) e Multicultural Odysseys. Navigatingthe New International Politics of Diversity (2007). Através dessas leituras, buscou-se compreender em particular de que modo a língua e o território se configuram como elementos definidores das culturas de povos nacionais e étnicos que empenham suas lutas para garantir a permanência desses atributos, tanto em nível doméstico como no plano internacional, a fim de assegurar a singularidade de seus modos de vida e de suas visões de mundo, enquanto grupos diferenciados. Para tanto, tornou-se fundamental a realização de uma análise crítica do processo de construção nacional dos Estados modernos, como um projeto levado a cabo por parte de inúmeros países na modernidade com o intuito de promover a unidade nacional de seus Estados, através da invisibilização das expressões culturais e da participação política de grupos culturalmente minoritários. Ao final, desenvolve-se uma pequena reflexão sobre como esse debate pode contribuir para uma melhor compreensão acerca das reivindicações de populações indígenas e remanescentes de quilombos no Brasil pela regularização de seus territórios e reconhecimento de suas práticas culturais.

Brincadeira e arte: patrimônio, formação cultural e samba de coco em Pernambuco

Esta proposta de estudo aborda questões relativas a políticas públicas de cultura. Tem por referente o samba de coco nas comunidades afrodescendentes de Castainho e Atoleiros, situadas nos municípios de Garanhuns e Caetés, do agreste de Pernambuco, região que se constitui parcela de território do antigo quilombo dos Palmares, um dos principais focos de resistência dos escravos negros do Brasil colonial, que se manteve incólume durante quase um século. Na região atribuída à existência do antigo quilombo estão vários grupos autointitulados remanescentes, que fazem dos ideais de força e resistência quilombola sua própria vida. O título do estudo é Brincadeira e arte: patrimônio, formação cultural e samba de coco em Pernambuco. O objetivo geral é relacionar o processo de criação em manifestações artísticas populares com as políticas institucionais empreendidas, numa perspectiva intercultural e transdisciplinar, tomando como referencial empírico a brincadeira de samba de coco nos municípios de Garanhuns e Caetés, em Pernambuco, respectivamente nas comunidades Sítio Castainho e Sítio Atoleiros, através da Banda Folclore Verde do Castainho e do Samba de Coco Santa Luzia. A ideia é viabilizar um estudo que se reporta ao conceito de patrimônio cultural étnico brasileiro, percebendo cultura como uma construção histórica da humanidade e compreendendo a manifestação artística como patrimônio imaterial. Trata-se de uma análise sobre grupos brincantes do chamado samba de coco como manifestação plural, de características diversificadas, que ambiciona influenciar políticas públicas destinadas a artistas populares ligados à música, ao canto, à dança e à literatura popular, encarnada em letras de canções, cujo conteúdo é repassado às novas gerações através da oralidade ou por ações de formação cultural, como iniciativas do poder público. Políticas públicas de cultura, patrimônio e formação cultural para preservação são as palavras-chave para identificação das condições atuais da relação entre artistas e gestão pública, considerando a perspectiva de educação não formal, no sentido atribuído pela UNESCO, referenciando-se em depoimentos como principal fonte. Conhecer algumas dimensões do imaginário mítico-simbólico que envolve produtores e gestores, é fundamento para o estudo, que se constitui a partir do levantamento, caracterização e análise da relação entre artistas e instituições de cultura, em diversas instâncias, considerando ideais de modernidade, permanências e transformações observadas no exercício, difusão e gestão da brincadeira. Os produtores do Povoado Atoleiros são criadores do samba de coco, brincadeira de adultos que se traduz em espaço de confraternização e comunhão e recebe interferência do poder público municipal, em Caetés, um dos municípios do entorno de Garanhuns, na periferia do qual está também o Sítio Castainho. Este, a partir de formas diversas de articulação, é contemplado por ações das gestões públicas municipal, estadual e federal, especificamente dentro do Festival de Inverno de Garanhuns FIG. A abordagem contempla a situação das duas comunidades, mas não elimina o reconhecimento de outros locais para a brincadeira do samba de coco e ações de preservação a ela direcionadas, como partes de um processo cultural que é também e necessariamente educativo e, em suas possibilidades de rupturas e continuidades, forma gerações.