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244 resultados

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Artigo Revisado por pares

Walter Riegel, O. K. Lenz, Volker Wilde,

... open-cast lignite mines in the area of Helmstedt (Lower Saxony, Germany), which record environmental changes at ... an example from the middle Eocene of the Helmstedt Mine from which we reconstruct ecological successions from ...

Tópico(s): Paleontology and Stratigraphy of Fossils

2015 - Society for Sedimentary Geology | Palaios

Artigo Revisado por pares

Elfriede Winkler,

... medium light and dark lithotypes from the Eocene Helmstedt brown coal deposit were examined by organic geochemical ... that the banding within the seam of the Helmstedt brown coal deposit results from different biogeochemical degradation ...

Tópico(s): Hydrocarbon exploration and reservoir analysis

1986 - Elsevier BV | Organic Geochemistry

Jornais Acesso aberto

Prof. Dr. A. Nehring, Dr. W. J. Hoffman, F. Grabowsky Braunschweig, Dr. R. Hansen,

... Gardesche Expedition in Südwestgrönland 1893, Die Lübbensteine Bei Helmstedt, Das Erdbeben in Griechenland 1894, Die Pelzrobbenjagd in ...

1894 - Gale Group | NCCO SciTechMed 2 of 2

Artigo Revisado por pares

O. K. Lenz, Sarah Diekmeier, Volker Wilde,

... beds intercalated in the lignite-bearing middle Eocene Helmstedt Formation in northern Germany. They are further confirmation ... two different Nypa species in the mangrove at Helmstedt is indicated despite the occurrence of five pollen ...

Tópico(s): Plant Diversity and Evolution

2020 - Taylor & Francis | Grana

Artigo Acesso aberto Revisado por pares

Karl-Ulrich Brosche, Michael Walther,

... Einige mehrgliedrige Lößprofile im Raum der Tagebaue Treue, Helmstedt und Alversdorf der Braunschweigischen Kohlenbergwerke bei Helmstedt werden beschrieben, interpretiert und datiert. In den vollständigen ...

Tópico(s): Geological formations and processes

1978 - | E&G Quaternary Science Journal

Artigo Acesso aberto Revisado por pares

Brigitte Urban, Harald Elsner, Adam Hölzer, Dietrich Mania, Barbara Albrecht,

Abstract. Im ostniedersächsischen Braunkohlengebiet bei Helmstedt waren von 1985 —1987 im Tagebau Schöningen mächtige eeminter glaziale Bildungen aufgeschlossen. Die mit teils autochthonen, teils allochthonen Kalk-Schluff-Torf- ...

Tópico(s): Ecology, Conservation, and Geographical Studies

1991 - | E&G Quaternary Science Journal

Artigo

I. Schneider,

... area in Lower Saxony (forest district Lappwald near Helmstedt) showed trap collection being dependent on light exposure, ... Männchen in einem Schadgebiet im FoA Lappwald (Krs. Helmstedt) mit dem Pheromon (Z) 11–14: Ac ergaben ...

Tópico(s): Plant and animal studies

1984 - Wiley | Zeitschrift für Angewandte Entomologie

Artigo Revisado por pares

Immo Heske, Silke Grefen-Peters, Martin Posselt, Julian Wiethold,

... die nordwestlichste Befestigung, die Hünenburg bei Watenstedt, Lkr. Helmstedt, konnten in den zurückliegenden Jahren die archäologischen Forschungen ... Peripherie und Zentrum – Die Hünenburg bei Watenstedt, Lkr. Helmstedt. Ein Herrschaftssitz in der Kontaktzone zwischen Lausitzer Kultur ...

Tópico(s): Archaeology and ancient environmental studies

2010 - De Gruyter | Praehistorische Zeitschrift

Artigo Revisado por pares

H. Gottwald,

Tópico(s): Geological Studies and Exploration

1992 - | Palaeontographica Abteilung B

Artigo Acesso aberto Revisado por pares

Kate J. Helmstedt, Hugh P. Possingham, Karl E. C. Brennan, Jonathan R. Rhodes, Michael Bode,

Fences that exclude alien invasive species are used to reduce predation pressure on reintroduced threatened wildlife. Planning these continuously managed systems of reserves raises an important extension of the Single Large or Several Small (SLOSS) reserve planning framework: the added complexity of ongoing management. We investigate the long-term cost-efficiency of a single large or two small predator exclusion fences in the arid Australian context of reintroducing bilbies Macrotis lagotis, and ...

Tópico(s): Ecology and Vegetation Dynamics Studies

2014 - Wiley | Ecological Applications

Artigo Acesso aberto Revisado por pares

Peter I. Macreadie, A. I. Robertson, Bernadette Spinks, Matthew Adams, Jennifer Atchison, Justine Bell‐James, Brett A. Bryan, Long Chu, Karen Filbee‐Dexter, Lauren Drake, Carlos M. Duarte, Daniel A. Friess, Felipe González, R. Quentin Grafton, Kate J. Helmstedt, Melanie Kaebernick, Jeffrey J. Kelleway, Gary A. Kendrick, Hilary Kennedy, Catherine E. Lovelock, J. Patrick Megonigal, Damien T. Maher, Emily Pidgeon, Abbie A. Rogers, Rob Sturgiss, Stacey M. Trevathan‐Tackett, Melissa Wartman, Kerrie A. Wilson, Kerrylee Rogers,

The global carbon sequestration and avoided emissions potentially achieved via blue carbon is high (∼3% of annual global greenhouse gas emissions); however, it is limited by multidisciplinary and interacting uncertainties spanning the social, governance, financial, and technological dimensions. We compiled a transdisciplinary team of experts to elucidate these challenges and identify a way forward. Key actions to enhance blue carbon as a natural climate solution include improving policy and legal ...

Tópico(s): Coastal and Marine Management

2022 - Elsevier BV | One Earth

Revisão Acesso aberto Revisado por pares

María R. Felipe‐Lucia, Angela M. Guerrero, Steven M. Alexander, Jaime Ashander, Jacopo A. Baggio, Michele L. Barnes, Örjan Bodin, Aletta Bonn, Marie‐Josée Fortin, Rachel Friedman, Jessica A. Gephart, Kate J. Helmstedt, Aislyn A. Keyes, Kailin Kroetz, François Massol, Michael J. O. Pocock, Jesse S. Sayles, Ross M. Thompson, Spencer A. Wood, Laura E. Dee,

Social–ecological networks (SENs) provide a promising approach to represent the complex ecological, social, and social–ecological relationships that influence ecosystems service supply. Ecosystem services can be represented in SENs as nodes, links, attributes, or as emergent properties of the network, each bringing distinct aspects of ecosystem services into focus to address different questions. Applications of SENs in ecosystem service research can foster: (i) understanding of the social and ecological ...

Tópico(s): Ecology and Vegetation Dynamics Studies

2021 - Elsevier BV | Trends in Ecology & Evolution

Artigo Acesso aberto Revisado por pares

Dana M. Bergstrom, Bárbara Wienecke, John van den Hoff, Lesley Hughes, David B. Lindenmayer, Tracy D. Ainsworth, Christopher M. Baker, Lucie M. Bland, David M. J. S. Bowman, Shaun T. Brooks, Josep G. Canadell, Andrew Constable, Katherine A. Dafforn, Michael H. Depledge, Catherine R. Dickson, Norman C. Duke, Kate J. Helmstedt, Andrés Holz, Craig R. Johnson, Mélodie A. McGeoch, Jessica Melbourne‐Thomas, Rachel Morgain, Emily Nicholson, Suzanne M. Prober, Ben Raymond, Euan G. Ritchie, Sharon A. Robinson, Katinka X. Ruthrof, Samantha A. Setterfield, Carla M. Sgrò, Jonathan S. Stark, Toby Travers, Rowan Trebilco, Delphi Ward, Glenda M. Wardle, Kristen J. Williams, Philip Zylstra, Justine D. Shaw,

Abstract Globally, collapse of ecosystems—potentially irreversible change to ecosystem structure, composition and function—imperils biodiversity, human health and well‐being. We examine the current state and recent trajectories of 19 ecosystems, spanning 58° of latitude across 7.7 M km 2 , from Australia's coral reefs to terrestrial Antarctica. Pressures from global climate change and regional human impacts, occurring as chronic ‘presses’ and/or acute ‘pulses’, drive ecosystem collapse. Ecosystem responses ...

Tópico(s): Land Use and Ecosystem Services

2021 - Wiley | Global Change Biology

Artigo Revisado por pares

Mario Tucci, Kim J. Krahn, Daniel Richter, Thijs van Kolfschoten, Bárbara Rodríguez-Álvarez, Ivo Verheijen, Jordi Serangeli, Jens Lehmann, Detlev Degering, Antje Schwalb, Brigitte Urban,

... the famous Lower Palaeolithic archaeological site Schöningen (district Helmstedt, Lower-Saxony, Germany) provided the reason for studying ...

Tópico(s): Archaeology and ancient environmental studies

2021 - Elsevier BV | Palaeogeography Palaeoclimatology Palaeoecology

Artigo Acesso aberto Revisado por pares

O. K. Lenz, Walter Riegel, Volker Wilde,

The Paleogene succession of the Helmstedt Lignite Mining District in Northern Germany includes coastal peat mire records from the latest Paleocene to the middle Eocene at the ...

Tópico(s): Botany and Plant Ecology Studies

2021 - Public Library of Science | PLoS ONE

Revisão Acesso aberto Revisado por pares

Rachel Eberhard, Anthea Coggan, Diane Jarvis, Evan Hamman, Bruce Taylor, Umberto Baresi, Karen Vella, Angela J. Dean, Felicity Deane, Kate J. Helmstedt, Helen J. Mayfield,

Governments in Australia and internationally are experimenting with policy instruments to facilitate the adoption of farming practices with reduced environmental impacts. The Great Barrier Reef (Australia) is one such case, where sustained efforts over 20 years have yielded insufficient progress towards targets to reduce the impacts of agriculture on water quality in downstream marine ecosystems. We present a critical review of policy instruments as implemented in Great Barrier Reef catchments. We ...

Tópico(s): Economic and Environmental Valuation

2021 - Elsevier BV | Marine Pollution Bulletin

Carta Acesso aberto Revisado por pares

Matthew Adams, Scott A. Sisson, Kate J. Helmstedt, Christopher M. Baker, Matthew Holden, Michaela Plein, Jacinta Holloway, Kerrie Mengersen, Eve McDonald‐Madden,

Abstract Well‐intentioned environmental management can backfire, causing unforeseen damage. To avoid this, managers and ecologists seek accurate predictions of the ecosystem‐wide impacts of interventions, given small and imprecise datasets, which is an incredibly difficult task. We generated and analysed thousands of ecosystem population time series to investigate whether fitted models can aid decision‐makers to select interventions. Using these time‐series data (sparse and noisy datasets drawn from ...

Tópico(s): Plant and animal studies

2020 - Wiley | Ecology Letters

Artigo Acesso aberto Revisado por pares

Kenneth R. N. Anthony, Kate J. Helmstedt, Line K. Bay, Pedro Fidelman, Karen Hussey, Petra Lundgren, David A. Mead, Ian McLeod, Peter J. Mumby, Maxine Newlands, Britta Schaffelke, Kerrie A. Wilson, Paul E. Hardisty,

Climate change is impacting coral reefs now. Recent pan-tropical bleaching events driven by unprecedented global heat waves have shifted the playing field for coral reef management and policy. While best-practice conventional management remains essential, it may no longer be enough to sustain coral reefs under continued climate change. Nor will climate change mitigation be sufficient on its own. Committed warming and projected reef decline means solutions must involve a portfolio of mitigation, ...

Tópico(s): Marine and fisheries research

2020 - Public Library of Science | PLoS ONE

Carta Acesso aberto Revisado por pares

Davide Di Vece, Rodolfo Citro, Victoria L. Cammann, Ken Kato, Sebastiano Gili, Konrad A. Szawan, Jozef Micek, Stjepan Jurisic, Katharina J. Ding, Beatrice Bacchi, Moritz Schwyzer, Alessandro Candreva, Eduardo Bossone, Fabrizio D’Ascenzo, Annahita Sarcon, Jennifer Franke, L. Christian Napp, Miłosz Jaguszewski, Michel Noutsias, Thomas Münzel, Maike Knorr, Susanne Heiner, Hugo A. Katus, Christof Burgdorf, Heribert Schunkert, Hölger Thiele, Johann Bauersachs, Carsten Tschöpe, Burkert Pieske, Lawrence Rajan, Guido Michels, Roman Pfister, Alessandro Cuneo, Claudius Jacobshagen, Gerd Hasenfuβ, Mahir Karakas, Wolfgang Köenig, Wolfgang Rottbauer, Samir M. Said, Ruediger C. Braun‐Dullaeus, Adrian Banning, Florim Cuculi, Richard Kobza, Thomas Fischer, Tuija Vasankari, Juhani Airaksinen, Grzegorz Opolski, Rafał Dworakowski, Philip MacCarthy, Christoph Kaiser, Stefan Osswald, Leonarda Galiuto, Filippo Crea, Wolfgang Dichtl, Klaus Empen, Stephan B. Felix, Clément Delmas, Olivier Lairez, Ibrahim El‐Battrawy, İbrahim Akın, Martin Borggrefe, Ekaterina Gilyarova, Alexandra Shilova, Mikhail Gilyarov, John D. Horowitz, Martin Kozel, Petr Toušek, Petr Widimský, David E. Winchester, Christian Ukena, Carlo Di Mario, Abhiram Prasad, Michael Böhm, Jeroen J. Bax, Thomas F. Lüscher, Frank Ruschitzka, Jelena R. Ghadri, Christian Templin,

... Department of Cardiac Electrophysiology, Helios St Marienberg, Hospital Helmstedt, Germany (S.M.S.). Search for more papers ...

Tópico(s): Cardiac Imaging and Diagnostics

2019 - Lippincott Williams & Wilkins | Circulation

Artigo Acesso aberto Revisado por pares

Jacinta Holloway, Kate J. Helmstedt, Kerrie Mengersen, Michael Schmidt,

Sustainable Development Goals (SDGs) are a set of priorities the United Nations and World Bank have set for countries to reach in order to improve quality of life and environment globally by 2030. Free satellite images have been identified as a key resource that can be used to produce official statistics and analysis to measure progress towards SDGs, especially those that are concerned with the physical environment, such as forest, water, and crops. Satellite images can often be unusable due to missing ...

Tópico(s): Land Use and Ecosystem Services

2019 - Multidisciplinary Digital Publishing Institute | Remote Sensing

Artigo Acesso aberto Revisado por pares

Van Butsic, Tobias Kuemmerle, Leo Pallud, Kate J. Helmstedt, Leandro Macchi, Matthew D. Potts,

Abstract Understanding the trade‐offs between biodiversity conservation and agricultural production has become a fundamental question in sustainability science. Substantial research has focused on how species’ populations respond to agricultural intensification, with the goal to understand whether conservation policies that spatially separate agriculture and conservation or, alternatively, integrate the two are more beneficial. Spatial heterogeneity in both species abundance and agricultural productivity ...

Tópico(s): Economic and Environmental Valuation

2019 - Wiley | Ecological Applications

Artigo Acesso aberto Revisado por pares

Claire A. Runge, John C. Withey, David E. Naugle, Joseph Fargione, Kate J. Helmstedt, Ashley E. Larsen, Sebastián Martinuzzi, Jason D. Tack,

Single species conservation unites disparate partners for the conservation of one species. However, there are widespread concerns that single species conservation biases conservation efforts towards charismatic species at the expense of others. Here we investigate the extent to which sage grouse (Centrocercus sp.) conservation, the largest public-private conservation effort for a single species in the US, provides protections for other species from localized and landscape-scale threats. We compared ...

Tópico(s): Fire effects on ecosystems

2019 - Public Library of Science | PLoS ONE

Artigo Acesso aberto Revisado por pares

Claire A. Runge, Andrew J. Plantinga, Ashley E. Larsen, David E. Naugle, Kate J. Helmstedt, Stephen Polasky, John Donnelly, Joseph T. Smith, Tyler J. Lark, Joshua J. Lawler, Sebastián Martinuzzi, Joseph Fargione,

Abstract Management of public lands, and who should have access to them, is often contentious. Most ranches in the western US rely upon seasonal grazing access to public lands, and conflict over biodiversity management has led to proposals to restrict grazing access on public lands. We evaluate whether grazing restrictions on public rangelands could have the unintended effect of increasing the conversion of private rangeland to cropland, causing habitat loss for sage‐grouse, a species of conservation ...

Tópico(s): Forest Management and Policy

2018 - Wiley | Journal of Applied Ecology

Revisão Acesso aberto Revisado por pares

Kate J. Helmstedt, Jennifer Stokes-Draut, Ashley E. Larsen, Matthew D. Potts,

Food, energy, and water (FEW) systems are inexorably linked. Earth's changing climate and increasing competition for finite land resources are creating and amplifying challenges at the FEW nexus. Managing FEW systems to mitigate these negative impacts and stresses is a pressing policy issue. The FEW interface is often managed as three independent systems, missing disruptive opportunities for streamlined integrated management. We contend that existing technologies can be reframed and emerging technologies ...

Tópico(s): Water-Energy-Food Nexus Studies

2018 - Elsevier BV | Journal of Environmental Management

Revisão Acesso aberto Revisado por pares

Ronald L. Davis, Yi Zhong,

... Full Text PDF PubMed Scopus (39) Google Scholar, Helmstedt et al., 2017Helmstedt T.J. Lattal K.M. ...

Tópico(s): Zebrafish Biomedical Research Applications

2017 - Cell Press | Neuron

Artigo Acesso aberto Revisado por pares

Shaun R. Coutts, Kate J. Helmstedt, Joseph Bennett,

Abstract Aim Many alien species experience a lag phase between arriving in a region and becoming invasive, which can provide a valuable window of opportunity for management. Our ability to predict which species are experiencing lags has major implications for management decisions that are worth billions of dollars and that may determine the survival of some native species. To date, timing and causes of lag and release have been identified post hoc, based on historical narratives. Location Global. ...

Tópico(s): Plant and animal studies

2017 - Wiley | Diversity and Distributions