scholarly journals Limited seed retention during winter inhibits vegetation establishment in spring, affecting lateral marsh expansion capacity

2019 ◽  
Vol 9 (23) ◽  
pp. 13294-13308 ◽  
Author(s):  
Marin Regteren ◽  
Irene Colosimo ◽  
Pepijn Vries ◽  
Marinka Elisabeth Barbara Puijenbroek ◽  
Victor Sebastiaan Freij ◽  
...  
Keyword(s):  
Seed Retention ◽  
Vegetation Establishment ◽  
Expansion Capacity

scholarly journals Seed shattering phenology at soybean harvest of economically important weeds in multiple regions of the United States. Part 1: broadleaf species

Weed Science ◽  
2020 ◽  
pp. 1-29
Author(s):  
Lauren M. Schwartz-Lazaro ◽  
Lovreet S. Shergill ◽  
Jeffrey A. Evans ◽  
Muthukumar V. Bagavathiannan ◽  
Shawn C. Beam ◽  
...  
Keyword(s):  
The United States ◽  
Ambrosia Artemisiifolia ◽  
Retention Rates ◽  
Weed Species ◽  
Physiological Maturity ◽  
Seed Retention ◽  
Northern Latitudes ◽  
Multiple Regions ◽  
Broadleaf Species ◽  
Crop Maturity

Abstract Potential effectiveness of harvest weed seed control (HWSC) systems depends upon seed shatter of the target weed species at crop maturity, enabling its collection and processing at crop harvest. However, seed retention likely is influenced by agroecological and environmental factors. In 2016 and 2017, we assessed seed shatter phenology in thirteen economically important broadleaf weed species in soybean [Glycine max (L.) Merr.] from crop physiological maturity to four weeks after physiological maturity at multiple sites spread across fourteen states in the southern, northern, and mid-Atlantic U.S. Greater proportions of seeds were retained by weeds in southern latitudes and shatter rate increased at northern latitudes. Amaranthus species seed shatter was low (0 to 2%), whereas shatter varied widely in common ragweed (Ambrosia artemisiifolia L.) (2 to 90%) over the weeks following soybean physiological maturity. Overall, the broadleaf species studied shattered less than ten percent of their seeds by soybean harvest. Our results suggest that some of the broadleaf species with greater seed retention rates in the weeks following soybean physiological maturity may be good candidates for HWSC.

Vegetation Establishment on Abandoned Coal Mined Land

1980 ◽  
Vol 23 (1) ◽  
pp. 0117-0120
Author(s):  
George V. Holmberg
Keyword(s):  
Vegetation Establishment

Children's perspectives on vegetation establishment: Implications for school ground greening

2014 ◽  
Vol 13 (1) ◽  
pp. 166-174 ◽  
Author(s):  
Märit Jansson ◽  
Allan Gunnarsson ◽  
Fredrika Mårtensson ◽  
Sarah Andersson
Keyword(s):  
Children’S Perspectives ◽  
Vegetation Establishment ◽  
School Ground

scholarly journals Morphodynamic simulation of sediment deposition patterns on a recently stripped bedrock anastomosed channel

2018 ◽  
Vol 377 ◽  
pp. 51-56 ◽  
Author(s):  
David Milan ◽  
George Heritage ◽  
Neil Entwistle ◽  
Stephen Tooth
Keyword(s):  
National Park ◽  
Sediment Deposition ◽  
Low Flow ◽  
Field Observations ◽  
Deposition Patterns ◽  
High Magnitude ◽  
Vegetation Establishment ◽  
Olifants River ◽  
Flow Stage ◽  
Dryland Rivers

Abstract. Some mixed bedrock-alluvial dryland rivers are known to undergo cycles of alluvial building during low flow periods, punctuated by stripping events during rare high magnitude flows. We focus on the Olifants River, Kruger National Park, South Africa, and present 2-D morphodynamic simulations of hydraulics and sediment deposition patterns over an exposed bedrock anastomosed pavement. We examine the assumptions underlying a previous conceptual model, namely that sedimentation occurs preferentially on bedrock highs. Our modelling results and local field observations in fact show that sediment thicknesses are greater over bedrock lows, suggesting these are the key loci for deposition, barform initiation and island building. During peak flows, velocities in the topographic lows tend to be lower than in intermediate topographic areas. It is likely that intermediate topographic areas supply sediment to the topographic lows at this flow stage, which is then deposited in the lows on the falling limb of the hydrograph as velocities reduce. Subsequent vegetation establishment on deposits in the topographic lows is likely to play a key role in additional sedimentation and vegetation succession, both through increasing the cohesive strength of alluvial units and by capturing new sediments and propagules.

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