first_imgThe hypothesis that rates of carbon exchange and recovery following dehydration by Antarctic bryophytes are related to habitat water availability was investigated. Carbon fixation was measured using an infra-red gas analysis system. As the water content of the bryophytes was reduced, respiration rates fell less quickly than those for gross photosynthesis. As a result, net photosynthesis moved from positive to negative, before tending to zero. Xeric species maintained a greater percentage of their photosynthetic capacity at reduced water contents than hydric species, although this trend was not reflected in terms of absolute carbon fixation. Comparison of the experimental observations with measurements of field water contents suggested that water contents of hydric and mesic species remained above those required to maintain maximal rates of photosynthesis through most of the growing season, whereas photosynthesis by xeric species was often water-limited. Recovery following rehydration demonstrated the typical bryophyte resaturation respiration burst and slower recovery of photosynthesis. Times taken to reach the compensation point were generally longer than those reported for non-polar species. Recovery was faster in xeric than in hydric species, although there was no correlation with the final degree of recovery. The results partially support the hypothesis tested, and provide a basis for the inclusion of water content and desiccation events in models of Antarctic bryophyte productivity.last_img read more


first_imgThe Phase 1 of the Core Project involves the development and production of the Southwark, Blythe and Elgood fields through five wells Subsea 7 to support the development of Phase 1 of Core Project offshore UK. (Credit: SUBSEA 7) Subsea 7 has been awarded an engineering, procurement, construction and installation (EPCI) contract by Independent Oil and Gas (IOG) for the subsea, umbilicals, risers and flowlines (SURF) work on Phase 1 of Core Project in the UK Southern North Sea (SNS).The contract award follows the recent approval by the UK Oil and Gas Authority (OGA) for the Phase 1 field development plan.The Phase 1 of the Core Project involves the development and production of the Southwark, Blythe and Elgood fields through five wells. The produced gas is planned to be transported via the Thames Pipeline to onshore.Subsea 7 to build flow lines between Southwark, Blythe and Elgood fieldsUnder the contract, Subsea 7 will be responsible for the project management, engineering, procurement, construction and installation of flow lines between the Southwark, Blythe and Elgood fields.The scope the contract includes installation of 6km extension to the Thames Pipeline to the Southwark platform, a 25km line connecting the Blythe platform to the Thames Pipeline, and a 9km pipeline and an umbilical connecting the Elgood field to the Blythe platform, and associated subsea structures and tie-ins.IOG CEO Andrew Hockey said: “We are pleased to be working with Subsea 7, a globally recognised leader in offshore energy services, for the SURF scope of Phase 1 of our core UK SNS gas development.“They will be an important contractor for IOG in ensuring safe and efficient Phase 1 execution, which includes the offshore pipelay campaign being prepared for the second half of this year.“We have already been working with Subsea 7 for several months under a pre-contractual arrangement and with the contract now finalised we look forward to further developing our constructive relationship.”Subsea 7 has already commenced the project management and detailed engineering at its office in Aberdeen. Offshore activities are planned to start in 2020.last_img read more


first_imgThis item has been moved to the National Archives as RAIB has published its safety digest describing this accident. See safety digest 03/2019,At around 12:36 hrs on 28 January 2019, a passenger train consisting of two coaches became derailed by the leading bogie at a set of points at Penryn station, while travelling at around 15 mph (24 km/h). The accident resulted in minor damage to the track, and there were no injuries to passengers.We have undertaken a preliminary examination into the circumstances surrounding this incident. Having assessed the evidence which has been gathered to date, we have decided to publish a safety digest.The safety digest will be made available on our website in the next few weeks.last_img read more


first_img Tweet LocalNews Waitukubuli National Trail to hold stakeholders consultation today by: – April 7, 2011 Photo credit: Waitukubuli National Trail ProjectThe Waitukubuli National Trail through the Project Management Unit spearheaded by Mr. Eddison Henry will be undertaking a stakeholders conference from 9:00am at the Portmouth Credit Union Hall.Although the trail is operational and can be used there are several arreas which need to be addressed hence the conveying of the stakeholders consultation including the tourism, government, private and public sectors.Micheal Eugene, Project Officer of the Waitukubuli National Trail Project explains some of the issues which will form part of the consultation;“Essentially we see serious issues as we’ve  been developing the hardware……the issue of cost, maintenance and sustainability on the trial. How is the trail going to be maintained, who is going to meet these costs, how are the operational costs going to be covered? We see the issue of optimization and segmenting the trail, we have fourteen segments, can they all be developed for different purposes to serve different specific needs or do we just open it up for the adventure type? ”There are also issues of hygiene, communication, standards as well as food safety and the Project Managment Unit is hopeful that at the end of the consultation they would have several idea and solutions to these pertinent matters.Dominica Vibes News encourages all in the North of the island to attend this consultation and lend thier support to this great project which has the potential to bring tremendous revenue to our island.Dominica Vibes News Share Sharing is caring!center_img Share Share 16 Views   no discussionslast_img read more