Results 41 to 50 of about 293,429 (371)
Modern Pollen Rain in the Tibetan Plateau
Frontiers in Earth Science, 2021 The basis for the interpretation of fossil-pollen assemblages in terms of vegetation and climate is the present-day relationship of vegetation and climate to pollen rain.
Caiming Shen +5 more
doaj +1 more source
Theoretical and Applied Genetics, 1992 In recent years a large number of reports have been published hinting about the possible role of selection at the male gametophyte level in natural conditions and its possible use as a tool in plant breeding programs. In this work, the evidence that has so far emerged on gametophytic selection is reviewed, and its relationship to pollen competition ...
Hormaza Urroz, José Ignacio +1 more
openaire +3 more sources
Earth Surface Processes and Landforms, Volume 47, Issue 15, Page 3515-3545, December 2022., 2022 Glacial geomorphology and postglacial landforms, derived from LiDAR‐based digital terrain models, together with radiocarbon‐dated sediment sequences, form the basis for landscape reconstruction spanning c. 2000 years (10,500–8500 cal. bp). After formation of streamlined terrain and ribbed moraine tracts followed intense glaciofluvial activity at ...
Per Möller +7 more
wiley +1 more source
Quantification of Pollen Viability in Lantana camara By Digital Holographic Microscopy [PDF]
arXiv, 2022 Pollen grains represent the male gametes of seed plants and their viability is critical for efficient sexual reproduction in the plant life cycle. Pollen analysis is used in diverse research thematics to address a range of botanical, ecological and geological questions. More recently it has been recognized that pollen may also be a vector for transgene
arxiv
Earth Surface Processes and Landforms, Volume 48, Issue 1, Page 198-214, January 2023., 2023 The Atlantic coast of NW Spain, where shingle beaches appear today, has suffered an important mobilization of dunes from a sea level about −120 m (bpsl), 20 ky ago. This aeolization caused the collapse of coastal/fluvial ecosystems (as forests) until the Late Holocene.
Carlos Arce Chamorro +3 more
wiley +1 more source
Advances in Meteorology, 2015 We have evaluated three prognostic variables in Weather Research and Forecasting (WRF) model, mean daily temperature, daily maximum temperature, and daily minimum temperature using 9 months of model simulations at 36 and 12 km resolution, and compared ...
C. A. Skjøth +6 more
doaj +1 more source
Pollenkitt is associated with the collectability of Malvoideae pollen for corbiculate bees
Journal of Pollination Ecology, 2023 Pollen grains of Malvoideae (Malvaceae) which corbiculate bees cannot collect constitute a floral filter that excludes pollen-collecting bumble bees and honey bees from exploiting pollen resources.
Sabine Konzmann +4 more
doaj +1 more source
Earth Surface Processes and Landforms, Volume 48, Issue 1, Page 215-229, January 2023., 2023 This paper uses a numerical landscape evolution model to reconstruct the topographic history of Madagascar since the Late Cretaceous. The model is optimised by balancing the volumes of onshore erosion and offshore sedimentation; the former is predicted with erosion laws and based on uplift history inferred from elevated planation surfaces.
Ruohong Jiao +4 more
wiley +1 more source
World Allergy Organization Journal, 2017 Background Grasses release the most widespread aeroallergens with considerable sensitization rates, while different species produce several pollen concentration peaks throughout the season.
Maximilian Kmenta +11 more
doaj +1 more source