“A shovel or a shopping cart”: lessons from ten years of disaster response by a student-led volunteer group     

Carlton  Sally  Nissen  Sylvia  Wong  Jennifer H. K.  Johnson  Sam 《Natural Hazards》2022,111(1):33-50

Natural Hazards - Recent years have seen growing interest in enabling volunteers to play a more pronounced role in disaster response, and yet efforts to systematically analyse this crisis volunteer...  相似文献   

Diatom paleoecology of Laguna Zoncho,Costa Rica     

Kurt?A.?HaberyanEmail author  Sally?P.?Horn 《Journal of Paleolimnology》2005,33(3):361-369

We analyzed diatoms in a sediment profile from Laguna Zoncho in southern Pacific Costa Rica (lake elevation 1190 m asl, depth 2.6 m, area 0.75 ha) spanning some 3240 cal yr. Diatoms are common in the profile, which we subdivide into three zones. Zone C (3240–1020 cal yr B.P.) is dominated by Staurosira construens var. venter and Aulacoseira spp.; during this time, the lake was dilute and circumneutral. Benthic and acidophilous taxa increase gradually in the upper section of this zone. Zone B (1020–460 cal yr B.P.) almost totally lacks Aulacoseira, and instead is dominated by combinations of Eunotia minor, Encyonema lunatum, Gomphonema gracile, and Pinnularia braunii. Previous pollen and charcoal analysis indicates that this zone falls within the peak of prehistoric agricultural activity at the lake, but diatoms may also reflect climate change. During this period, the lake was likely shallower and more acidic, but not eutrophic. Finally, Zone A (460 cal yr B.P. to AD 1997) begins near a 1.5-cm tephra layer from nearby Volcán Barú; diatom assemblages are dominated by Aulacoseira spp., and suggest deepening of the lake and return to conditions similar to Zone C. This was a time of indigenous population decline and forest recovery in the Zoncho region, probably reflecting the impact of European diseases on the native population, although climate change and impacts of the tephra deposition cannot be wholly discounted.  相似文献   

Factors contributing to the removal of a marine grass invader (<Emphasis Type="Italic">Spartina anglica</Emphasis>) and subsequent potential for habitat restoration     

Tabitha?G.?Reeder  Sally?D.?HackerEmail author 《Estuaries and Coasts》2004,27(2):244-252

Our goal is to understand how removal regime and habitat type interact to influence removal success of a marine plant invader and the subsequent potential for restoration. In particular, we investigate the management program designed to eradicate the English cordgrass,Spartina anglica C. E. Hubbard, in marine intertidal habitats of Puget Sound, Washington, United States. Observational and manipulative experiments were used to measure the regrowth (vegetative growth), reinvasion (seedling recruitment), and restoration potential (return to native condition) of invaded habitats. Removal regime (consistent: yearly removal; interrupted: yearly removal with the last year missed) and habitat type (low salinity marsh, mudflat, cobble beach, and high salinity marsh sites) were considered. The response to removal regime was dramatic. Under consistent removal, cordgrass slowly declined but under interrupted removal, there was substantial regrowth of the invader. This pattern results from the resiliency of belowground biomass and the subsequent high aboveground productivity and seedling growth ofS. anglica. We also found that removal success depended on differences among sites that represent different habitat types. Cordgrass regrowth and reinvasion were substantially higher in the low salinity marsh sites where soils have lower salinity. We also found that at the low salinity marsh sites, some restoration of native plants and soil conditions was evident. At mudflat, cobble beach, and high salinity marsh sites, colonization of native vascular plants and algae not normally present, in the absence of the invasion, occurred. Whether these habitats will eventually revert back to the pre-invasion conditions over a longer period of time is unknown.  相似文献   

Mucky carrots and other proxies: Problematising the knowledge-fix for sustainable and ethical consumption     

Sally Eden  Christopher Bear 《Geoforum》2008,39(2):1044-1057

This paper uses evidence from focus groups in England to consider how consumers think about and, more importantly, distinguish foods by both primary and secondary qualities, using both their own judgement but also advice produced by various organisations acting as ‘knowledge intermediaries’, such as independent certification bodies. We thus consider the ‘sorting out’ that consumers do with food, particularly in developing typologies of ‘goodness’ and ‘badness’, and the cues on which they base these judgements, from the material immediacy of ‘mucky carrots’ to the abstract remoteness of organic certification. In particular, we problematise the ‘knowledge-fix’ that underlies attempts to provide knowledge to promote more sustainable and ethical consumption. This raises problems of how consumers give assurance schemes meaning, how ethical and sustainable schemes are subject to re-fetishization and how consumers tend towards increasing scepticism and distrust of such claims, thus making a ‘politics of reconnection’ far from easy.  相似文献   

Reports from the Smithsonian’s Global Volcanism Network,December 2008     

Edward Venzke  Sally Kuhn Sennert  Richard Wunderman 《Bulletin of Volcanology》2009,71(5):593-594

Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 33, no. 12, December 2008 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   

Reports from the Smithsonian’s Global Volcanism Network, March 2008     

Edward Venzke  Sally Kuhn Sennert  Richard Wunderman 《Bulletin of Volcanology》2009,71(1):117-119

Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 33, no. 3, March 2008 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   

Smithsonian Institution’s Global Volcanism Network     

Edward Venzke  Sally Kuhn Sennert  Richard Wunderman 《Bulletin of Volcanology》2008,70(4):541-543

Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 32, no. 5, May 2007 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   

Smithsonian Institution’s Global Volcanism Network     

Edward Venzke  Sally Kuhn Sennert  Richard Wunderman 《Bulletin of Volcanology》2008,70(6):769-770

Information included in this summary is based on more detailed reports published in the Bulletin of the Global Volcanism Network, vol. 32, no. 8, August 2007 (on the Internet at ). Edited by scientists at the Smithsonian, this bulletin includes reports provided by a worldwide network of correspondents. The reports contain the names and contact information for all sources. Please note that these reports are preliminary and subject to change as events are studied in more detail. The Global Volcanism Program welcomes further reports of current volcanism, seismic unrest, monitoring data, and field observations.  相似文献   

Integrating GIS and Data Visualization Tools for Distributed Hydrologic Modeling   总被引：1，自引：0，他引：1  

Claudio Paniconi  Sally Kleinfeldt  Jonathan Deckmyn  & Andrea Giacomelli 《Transactions in GIS》1999,3(2):97-118

Distributed hydrologic models are an integral component of spatial decision support systems for watershed management. At these basin (and larger) scales, a common problem in hydrology and other environmental sciences arises from the need to cope with the increasingly sophisticated models and software tools that are used in the management, processing, and analysis of large volumes of data collected from advanced in situ and remote monitoring instruments. The diversity of these tools, and the need for experts and non-experts alike to be able to easily use them, suggests a non-trivial integration problem of building customized systems from disparate (and in many cases proprietary) components. In this paper we address the systems integration problem within the context of a study of surface-subsurface-atmosphere interactions involving soil moisture remote sensing and hydrologic simulation. The simple early steps that were taken highlight the role of the different components and tools in the integration effort. An alternative approach is presented for creating an integrated system, based on a data flow model with the modular components linked within a flexible framework. An example is developed based on established systems integration techniques from the field of computer aided design.  相似文献   

Environmental restoration: environmental management or environmental threat?     

Sally Eden  Sylvia M. Tunstall†  Susan M. Tapsell† 《Area》1999,31(2):151-159

Summary This paper compares the ethical and political issues raised by two environmental restoration schemes in England: those of the River Skerne and the A33 near Twyford Down. Neither example fully restores a 'natural' condition, nor tries to, but both raise questions about how far restoration is an acceptable option for environmental management.  相似文献