Now showing items 1-20 of 103

  • Andean grasslands are as productive as tropical cloud forests 

    Oliveras, I.; Girardin, C.; Doughty, C. E.; Cahuana, N.; Arenas, C. E.; Oliver, V.; Huasco, W. Huaraca; Malhi, Y. (2014-11) - Journal article
    We aim to assess net primary productivity (NPP) and carbon cycling in Andean tropical alpine grasslands (puna) and compare it with NPP of tropical montane cloud forests. We ask the following questions: (1) how do NPP and ...
  • Another continental vulture crisis : Africa’s vultures collapsing toward extinction 

    Ogada, Darcy; Shaw, Philip; Beyers, Rene L; Buij, Ralph; Murn, Campbell; Thiollay, Jean Marc; Beale, Colin M; Holdo, Ricardo M; Pomeroy, Derek; Baker, Neil; Krüger, Sonja C; Botha, Andre; Virani, Munir Z; Monadjem, Ara; Sinclair, Anthony R E (2016-04-26) - Journal article
    Vultures provide critical ecosystem services, yet populations of many species have collapsed worldwide. We present the first estimates of a 30-year Pan- African vulture decline, confirming that declines have occurred on a ...
  • The anthropogenic influence on wildfire regimes : charcoal records from the Holocene and Last Interglacial at Ioannina, Greece 

    Lawson, I. T.; Tzedakis, P. C.; Roucoux, K. H.; Galanidou, N. (2013-12) - Journal article
    Aim: To characterize the changing fire regime of a Mediterranean landscape during the Holocene and the Last Interglacial and, by comparing the two periods, to improve our understanding of the extent and timing of human ...
  • Apparent OSL ages of modern deposits from Fåbergstølsdalen, Norway : implications for sampling glacial sediments 

    King, Georgina; Robinson, Ruth Alison Joyce; Finch, Adrian Anthony (2013-10-16) - Journal article
    The application of optically stimulated luminescence (OSL) dating within glacial settings can be limited where sediments have not had their OSL signal fully reset by sunlight exposure. Heterogeneous bleaching can result ...
  • Are inventory based and remotely sensed above-ground biomass estimates consistent? 

    Hill, Timothy Charles; Williams, Mathew; Bloom, A. Anthony; Mitchard, Edward; Ryan, Casey (2013-09-19) - Journal article
    Carbon emissions resulting from deforestation and forest degradation are poorly known at local, national and global scales. In part, this lack of knowledge results from uncertain above-ground biomass estimates. It is ...
  • Assessing national perspectives on the Arctic : The case of Norway 

    Rehner, Robert Wilhelm Michael; McCauley, Darren; Khubaeva, Alisa; Zhuvakin, Dmitry (Arctic Research Centre, 2015-04-01) - Report
  • Assessing performance of Bayesian state-space models fit to Argos Satellite telemetry locations processed with Kalman Filtering 

    Silva, Monica A.; Jonsen, Ian; Russell, Deborah Jill Fraser; Prieto, Rui; Thompson, David; Baumgartner, Mark F. (2014-03-20) - Journal article
    Argos recently implemented a new algorithm to calculate locations of satellite-tracked animals that uses a Kalman filter (KF). The KF algorithm is reported to increase the number and accuracy of estimated positions over ...
  • Attenuation of species abundance distributions by sampling 

    Shimadzu, Hideyasu; Darnell, Ross (2015-04-22) - Journal article
    Quantifying biodiversity aspects such as species presence/ absence, richness and abundance is an important challenge to answer scientific and resource management questions. In practice, biodiversity can only be assessed ...
  • Boron isotope evidence for oceanic carbon dioxide leakage during the last deglaciation 

    Martínez-Botí, M A; Marino, G; Foster, G L; Ziveri, P; Henehan, M J; Rae, J W B; Mortyn, P G; Vance, D (2015-02-12) - Journal article
    Atmospheric CO2 fluctuations over glacial-interglacial cycles remain a major challenge to our understanding of the carbon cycle and the climate system. Leading hypotheses put forward to explain glacial-interglacial atmospheric ...
  • Calving rates at tidewater glaciers vary strongly with ocean temperature 

    Luckman, A.; Benn, Doug I; Cottier, F.; Bevan, S.; Nilsen, F.; Inall, M. (2015-10-09) - Journal article
    Rates of ice mass loss at the calving margins of tidewater glaciers (frontal ablation rates) are a key uncertainty in sea level rise projections. Measurements are difficult because mass lost is replaced by ice flow at ...
  • Can macrophyte harvesting from eutrophic water close the loop on nutrient loss from agricultural land? 

    Quilliam, R.S.; van Niekerk, M.A.; Chadwick, D.R.; Cross, P.; Hanley, N.; Jones, D.L.; Vinten, A.J.A.; Willby, N.; Oliver, D.M. (2015-04-01) - Journal article
    Eutrophication is a major water pollution issue and can lead to excessive growth of aquatic plant biomass (APB). However, the assimilation of nutrients into APB provides a significant target for their recovery and reuse, ...
  • Climatic and geometric controls on the global distribution of surge-type glaciers : implications for a unifying model of surging 

    Sevestre, H.; Benn, Doug I (2015-09-01) - Journal article
    Controls on the global distribution of surge-type glaciers hold the keys to a better understanding of surge mechanisms. We investigate correlations between the distribution of surge-type glaciers and climatic and glacier ...
  • Consistency in eyewitness reports of aquatic "monsters" 

    Paxton, Charles George Mackay; Shine, Adrian J. (2016-03-15) - Journal article
    Little work has been undertaken on the consistency/repeatabilityof reports of natural historical anomalies. Such information is usefulin understanding the reporting process associated with such accountsand distinguishing ...
  • Constraining ecosystem processes from tower fluxes and atmospheric profiles 

    Hill, T. C.; Williams, M.; Woodward, F. I.; Moncrieff, J. B. (2011-07) - Journal article
    The planetary boundary layer (PBL) provides an important link between the scales and processes resolved by global atmospheric sampling/modeling and site-based flux measurements. The PBL is in direct contact with the land ...
  • Consumer acceptability of interventions to reduce Campylobacter in the poultry food chain 

    MacRitchie, Laura; Hunter, Colin John; Strachan, Norval (2014-01) - Journal article
    Reducing human Campylobacter cases has become a priority for the UK Government. However the public’s views on acceptability of interventions to reduce Campylobacter in poultry production are poorly understood in the UK and ...
  • Contesting climate justice in the city : examining politics and practice in urban climate change experiments 

    Bulkeley, Harriet; Edwards, Gareth A. S.; Fuller, Sara (2014-03) - Journal article
    Debates about climate justice have mainly occurred at the international scale, and have focussed on the rights and responsibilities of nation-states to either be protected from the effects of climate change, or to take ...
  • Continental growth and the crustal record 

    Hawkesworth, Chris; Cawood, Peter; Dhuime, Bruno (2013-12-08) - Journal item
    The continental crust is the archive of Earth history. The spatial and temporal distribution of the Earth's record of rock units and events is heterogeneous with distinctive peaks and troughs in the distribution of ages ...
  • Continental weathering following a Cryogenian glaciation : evidence from calcium and magnesium isotopes 

    Kasemann, S.A.; Pogge von Strandmann, P.A.E.; Prave, A.R.; Fallick, A.E.; Elliott, T.; Hoffmann, K.-H. (2014-06-15) - Journal article
    A marked ocean acidification event and elevated atmospheric carbon dioxide concentrations following the extreme environmental conditions of the younger Cryogenian glaciation have been inferred from boron isotope measurements. ...
  • Contrasting changes in the abundance and diversity of North American bird assemblages from 1971 to 2010 

    Schipper, Aafke M.; Belmaker, Jonathan; de Miranda, Murilo Dantas; Navarro, Laetitia M.; Böhning-Gaese, Katrin; Costello, Mark J.; Dornelas, Maria; Foppen, Ruud; Hortal, Joaquín; Huijbregts, Mark A.J.; Martín-López, Berta; Pettorelli, Nathalie; Queiroz, Cibele; Rossberg, Axel G.; Santini, Luca; Schiffers, Katja; Steinmann, Zoran J.N.; Visconti, Piero; Rondinini, Carlo; Pereira, Henrique M. (2016-05-12) - Journal article
    Although it is generally recognized that global biodiversity is declining, few studies have examined long-term changes in multiple biodiversity dimensions simultaneously. In this study we quantified and compared temporal ...
  • A conversation with Richard M. Cormack 

    Buckland, Stephen Terrence (2016-05) - Journal article
    Richard Melville Cormack is one of the giants who developed the theory of mark-recapture. Referring to his key paper in 1964, and the papers published back-to-back in 1965 by George Jolly and George Seber, the `Cormack-Jolly-Seber ...