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News and Views
Palaeoclimate: A fiery start to the Jurassic -
Bas van de Schootbrugge
doi:10.1038/ngeo878
The Triassic/Jurassic boundary was marked by widespread environmental changes, including greenhouse warming. Palaeoecological reconstructions from East Greenland reveal a dramatic rise in fire activity, driven by vegetation shifts and climate change.
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Geomorphology: Co-evolution of rivers and plants -
Chris Paola
doi:10.1038/ngeo1247
River systems have changed through time; the sinuous, stable channels common today developed relatively late in Earth's history. The rock record suggests that a specific type of fixed-channel river system arose after the expansion of arborescence.
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Review
Terrestrial biogeochemical feedbacks in the climate system -
A. Arneth, S. P. Harrison, S. Zaehle, K. Tsigaridis, S. Menon, P. J. Bartlein, J. Feichter, A. Korhola, M. Kulmala, D. O'Donnell, G. Schurgers, S. Sorvari & T. Vesala
doi:10.1038/ngeo905
The terrestrial biosphere is a key regulator of atmospheric chemistry and climate. Total positive radiative forcing resulting from biogeochemical feedbacks between the terrestrial biosphere and atmosphere could be equally as important as that resulting from physical feedbacks.
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Letters
Increased fire activity at the Triassic/Jurassic boundary in Greenland due to climate-driven floral change -
Claire M. Belcher, Luke Mander, Guillermo Rein, Freddy X. Jervis, Matthew Haworth, Stephen P. Hesselbo, Ian J. Glasspool & Jennifer C. McElwain
doi:10.1038/ngeo871
An episode of climate warming 200 Myr ago was associated with catastrophic environmental changes. Experimental and palaeontological data suggest that a climate-driven shift to more flammable leaf shapes contributed to increased fire activity in East Greenland at this time.
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Ground-level ozone influenced by circadian control of isoprene emissions -
C. N. Hewitt, K. Ashworth, A. Boynard, A. Guenther, B. Langford, A. R. MacKenzie, P. K. Misztal, E. Nemitz, S. M. Owen, M. Possell, T. A. M. Pugh, A. C. Ryan & O. Wild
doi:10.1038/ngeo1271
The volatile organic compound isoprene — a precursor to the air pollutant ozone — is produced by many plant species. Canopy-scale measurements in Malaysia, combined with model simulations, suggest that isoprene emissions are under circadian control.
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Articles
Influence of high-latitude vegetation feedbacks on late Palaeozoic glacial cycles -
Daniel E. Horton, Christopher J. Poulsen & David Pollard
doi:10.1038/ngeo922
Ice ages during the Palaeozoic era are marked by glacial–interglacial cycles thought to be driven by variations in the Earth's orbit. Numerical simulations suggest that the response of vegetation to the varying insolation may be an important factor in the associated climate response.
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Evolution of fixed-channel alluvial plains in response to Carboniferous vegetation-
Neil S. Davies & Martin R. Gibling
doi:10.1038/ngeo1237
The expansion of land plants led to the development of new river and floodplain morphologies. Field studies suggest that the expansion of tree habitats in the Carboniferous period caused the development of river systems dominated by multiple channels and stable alluvial islands.
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