Possibilities for management of coastal foredunes with deteriorated stands ofAmmophila arenaria (marram grass)

1995 ◽  
Vol 1 (1) ◽  
pp. 29-39 ◽  
Author(s):  
W. H. van der Putten ◽  
B. A. M. Peters
1997 ◽  
Vol 3 (2) ◽  
pp. 179-190 ◽  
Author(s):  
D. van der Laan ◽  
O. F. R. van Tongeren ◽  
W. H. van der Putten ◽  
G. Veenbaas

2015 ◽  
Vol 99 ◽  
pp. 148-166 ◽  
Author(s):  
Wenyan Zhang ◽  
Ralf Schneider ◽  
Jakob Kolb ◽  
Tim Teichmann ◽  
Joanna Dudzinska-Nowak ◽  
...  

2018 ◽  
Vol 10 (5) ◽  
pp. 669 ◽  
Author(s):  
Patrick Launeau ◽  
Manuel Giraud ◽  
Antoine Ba ◽  
Saïd Moussaoui ◽  
Marc Robin ◽  
...  

2017 ◽  
Vol 5 (3) ◽  
pp. 417-427 ◽  
Author(s):  
Evan B. Goldstein ◽  
Laura J. Moore ◽  
Orencio Durán Vinent

Abstract. Coastal foredunes form along sandy, low-sloped coastlines and range in shape from continuous dune ridges to hummocky features, which are characterized by alongshore-variable dune crest elevations. Initially scattered dune-building plants and species that grow slowly in the lateral direction have been implicated as a cause of foredune hummockiness. Our goal in this work is to explore how the initial configuration of vegetation and vegetation growth characteristics control the development of hummocky coastal dunes including the maximum hummockiness of a given dune field. We find that given sufficient time and absent external forcing, hummocky foredunes coalesce to form continuous dune ridges. Model results yield a predictive rule for the timescale of coalescing and the height of the coalesced dune that depends on initial plant dispersal and two parameters that control the lateral and vertical growth of vegetation, respectively. Our findings agree with previous observational and conceptual work – whether or not hummockiness will be maintained depends on the timescale of coalescing relative to the recurrence interval of high-water events that reset dune building in low areas between hummocks. Additionally, our model reproduces the observed tendency for foredunes to be hummocky along the southeast coast of the US where lateral vegetation growth rates are slower and thus coalescing times are likely longer.


2005 ◽  
Vol 53 (2) ◽  
pp. 133 ◽  
Author(s):  
Julie Hinchliffe ◽  
John G. Conran

Olearia axillaris (DC.) F.Muell. ex Benth.: Asteraceae) shrubs in the remnant coastal foredunes at Tennyson in suburban Adelaide, South Australia, were measured for height, width, largest trunk diameter, percentage stem reflexing, percentage procumbent stems and percentage dead stems. Cluster analysis grouped the plants into three distinct life classes: Juvenile, with erect trunks <1 m tall and main trunk <5 cm in diameter; Mature, at ~1.5 m tall and with numerous reflexed stems 8–12 cm in diameter; and Senescent, at ~2 m tall, trunk 8–12 cm in diameter, with numerous procumbent stems and dead branches. A survey of the site also found that although abundant, indicating continuing recruitment, juveniles were most common on the foredunes. Application of this life-classing technique to several burnt and unburnt sites in the Coorong, South Australia, confirmed its utility for assessing population structure, with recently burnt sites showing significantly fewer specimens from later life classes. The ability to life class O. axillaris permits rapid assessment of population structure in this dominant coastal foredune shrub, allowing dune health and recruitment to be monitored easily and managed more efficiently.


Nematology ◽  
2005 ◽  
Vol 7 (2) ◽  
pp. 169-178 ◽  
Author(s):  
Wim van der Putten ◽  
Henk Duyts ◽  
E. Pernilla Brinkman

AbstractWe studied the effects of intra- and interspecific competition on the abundance of endoparasitic nematodes and assessed the consequences for biomass production of the natural dune grass Ammophila arenaria. Pratylenchus penetrans was limited by intraspecific competition and it suppressed the abundance of Heterodera arenaria, whilst the interaction between H. arenaria and Meloidogyne maritima was neutral. Pratylenchus penetrans and H. arenaria reduced plant biomass, whereas M. maritima did not. Plant biomass was not differently affected by adding one or two nematode species. When added to older plants, numbers of H. arenaria and M. maritima were higher but numbers of P. penetrans were lower, resulting in less reduction of plant biomass. We discuss our results on this natural system with respect to patterns of interspecific nematode competition observed in agricultural systems.


1974 ◽  
Vol 52 (5) ◽  
pp. 1057-1073 ◽  
Author(s):  
A. G. van der Valk

Shifting sand, which either buries the seeds or seedlings of dune forbs or carries them away, is responsible for the absence of forbs on the front of the foredune and in other zones accumulating sand regularly. Experimental work with the seedlings of six dune forbs showed that they can withstand burial by no more than 5 cm of sand and that their seeds can survive burial under only 1 to 16 cm, depending on the species. At least 20 to 30 cm of sand normally accumulates each winter in a zone subject to regular sand deposition. Salt spray plays a secondary role in preventing the establishment of forbs on the front of the foredune. It is responsible for the elimination of species which may occasionally escape burial during the winter months and which happen to be susceptible to salt spray injury. Measurements of soil moisture, soil nutrients, and soil temperatures indicate that these factors differ only slightly on the front, top, and back of the foredune. These three factors, then, appear to have little influence on the distribution of the forbs.


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