Soil Resource Levels and Competition between a Woody and Herbaceous Species

1989 ◽  
Vol 116 (1) ◽  
pp. 22 ◽  
Author(s):  
J. K. Bush ◽  
O. W. Van Auken
Keyword(s):  
Herbaceous Species ◽  
Soil Resource ◽  
Resource Levels

Ramet spacing of Elymus lanceolatus (thickspike wheatgrass) in response to neighbour density

2001 ◽  
Vol 79 (9) ◽  
pp. 1122-1126 ◽  
Author(s):  
L David Humphrey ◽  
David A Pyke
Keyword(s):  
Clonal Growth ◽  
Soil Resource ◽  
High Resource ◽  
Elymus Lanceolatus ◽  
Second Year ◽  
Resource Levels ◽  
Resource Patches ◽  
Physical Resistance ◽  
Clonal Foraging ◽  
Field Plots

Many plants exploit patchy resources through clonal foraging. Plants established in field plots were used to determine if Elymus lanceolatus ssp. lanceolatus (Scribner et J.G. Smith) Gould (thickspike wheatgrass) showed a clonal foraging response to neighbour densities, as it had previously shown to patchy soil nutrients. Neighbours consisted of the rhizomatous E. lanceolatus ssp. lanceolatus and the bunchgrass Elymus lanceolatus ssp. wawawaiensis (Scribner et Gould) J.R. Carlson et D.R. Dewey (proposed name), which are both native to the semiarid western U.S.A., and their ratios as well as total densities varied. Rather than an increase in spacing of exploratory ramets at high densities, as expected with clonal foraging, there was a decrease in spacing in both years of the experiment. Fewer target plants produced exploratory ramets at higher densities only in the second year. These reductions in exploratory clonal growth at higher neighbour densities, which were opposite to E. lanceolatus ssp. lanceolatus' response to low-resource patches, occurred perhaps because soil resource levels were too low overall to support rhizome production, and this condition was more pronounced in the second year. Physical resistance from neighbour roots perhaps also reduced rhizome production. However, rhizome growth may not be beneficial in such cases, and plants may be adapted to produce exploratory rhizomes only when some high-resource patches are encountered by the clone.Key words: clonal growth, competition, Elymus lanceolatus, plasticity, resource levels, rhizomes.

Endophytic fungus fine-tunes the persistence strategy of its alpine host grass in response to soil resource levels

Oikos ◽  
2012 ◽  
Vol 122 (3) ◽  
pp. 367-376 ◽  
Author(s):  
Anaïs Gibert ◽  
Danièle Magda ◽  
Laurent Hazard
Keyword(s):  
Endophytic Fungus ◽  
Soil Resource ◽  
Resource Levels

BATTLE OF THE GIANTS: PRIMARY AND SECONDARY INVASIONS BY LARGE HERBACEOUS SPECIES

2012 ◽  
Vol 111 (3) ◽  
pp. 1-17 ◽  
Author(s):  
Margherita Gioria ◽  
Burkart Dieterich ◽  
Bruce Osborne
Keyword(s):  
Herbaceous Species

Excavation at Newton, Islay

1988 ◽  
Vol 15 (1) ◽  
pp. 23-51 ◽  
Author(s):  
R McCullagh ◽  
M Andrews ◽  
Anne Clarke ◽  
G Collins ◽  
E Halpin ◽  
...  
Keyword(s):  
Land Use ◽  
Final Phase ◽  
Soil Resource ◽  
Three Phases

Summary Excavations at Newton have revealed three phases of land use. Mesolithic activity was restricted to small flint working and domestic sites. A Neolithic phase appears to relate to a fragile soil resource which rapidly declined in quality. The final phase, possibly related to a Christian Irish presence on the island, occurs late in the sequence.

scholarly journals A Conserved Carbon Starvation Response Underlies Bud Dormancy in Woody and Herbaceous Species

2017 ◽  
Vol 8 ◽  
Author(s):  
Carlos Tarancón ◽  
Eduardo González-Grandío ◽  
Juan C. Oliveros ◽  
Michael Nicolas ◽  
Pilar Cubas
Keyword(s):  
Carbon Starvation ◽  
Bud Dormancy ◽  
Herbaceous Species ◽  
Starvation Response
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