Results 31 to 40 of about 105,933 (212)
Frontiers in Ecology and Evolution, 2022 Our overall understanding of long-term climate dynamics is largely based on proxy data generated from archives such as ice cores, ocean sediments, tree rings, speleothems, and corals, whereas reconstructions of long-term changes in vegetation and ...
Johannes Edvardsson +3 more
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Quaternary, 2019 Easter Island (Rapa Nui) deforestation has traditionally been viewed as a single event, synchronous in time and space across the island and caused by Polynesian settlers.
Irantzu Seco +9 more
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A note on a thermokarst feature on the North Slope of Alaska [PDF]
Bulletin of the Geological Society of Finland, 1994 A thermokarst depression with active thermal erosion on one margin and a drainage way to the Sagavanirktok River is described with the aid of a sketch plan and sections.
R.G. West, J.J. Donner, T. Kankainen
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Acta Scientiarum: Animal Sciences, 2013 The pollen spectrum of propolis is a good indicative of the phytogeographical origin of the bee product and the local flora available for bee visiting. The present study aimed to perform pollen analysis of propolis produced by Apis mellifera L., in the ...
Cinthia Rio Branco da Silva +2 more
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DiversityPalaeoecological investigations connected with extensive pre-bog, stone walls, and field systems at Kilmore, Dingle peninsula, Ireland, are presented. The main pollen profile, KLM I, spans the last 4000 years.
Michael O’Connell, Steffen Wolters
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Perspectives on deciphering mechanisms underlying plant heat stress response and thermotolerance
, 2013 Global warming is a major threat for agriculture and food safety and in many cases the negative effects are already apparent. The current challenge of basic and applied plant science is to decipher the molecular mechanisms of heat stress response (HSR ...
Fragkostefanakis, Sotirios +1 more
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An Analysis of the Arabidopsis Pollen Transcriptome [PDF]
Plant Physiology, 2007 In flowering plants, male gametogenesis occurs in the anthers. The division of a diploid sporogenic cell results in two cells with very different fates—the tapetal initial cell and the pollen mother cell.
openaire +2 more sources
Can ploidy levels explain the variation of Herbertia lahue (Iridaceae)? [PDF]
Genetics and Molecular BiologyPolyploidy is often related with phenotypic variation, as observed in Herbertia lahue, a geophyte species. This study examined the H. lahue polyploid series and departure in cytogenetic, morphometric, and pollen data.
Eudes Maria Stiehl-Alves +5 more
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Insects, 2022 Ornamental nursery plants are both a major agricultural industry in the U.S. and a major feature of the urban and suburban landscape. Interest in their relationship with pollinators is two-fold: the extent to which they provide a nutritional benefit to ...
Kimberly A. Stoner +4 more
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Nature Conservation Research: Заповедная наука, 2017 The paper presents reconstructions of vegetation and forest coverage dynamics in the area of the State Military-Historical and Natural Museum-Reserve «Kulikovo Pole» (Upper Don River basin) in the middle and late Holocene, based on modern and fossil ...
Elena Yu. Novenko
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