Summary
Vegetation mosaics of grassland and exposed soil are often the outcome of intense herbivory and represent alternate stable states, although the vegetational and soil processes that both initiate and maintain the states in response to herbivory are poorly understood. 2 The vegetation mosaic resulting...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.531.4025 2023-05-15T18:03:43+02:00 Summary J. R. Mclaren R. L. Jefferies The Pennsylvania State University CiteSeerX Archives 2004 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.4025 http://research.amnh.org/~rfr/hbp/jenny.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.4025 http://research.amnh.org/~rfr/hbp/jenny.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://research.amnh.org/~rfr/hbp/jenny.pdf Puccinellia phrygano text 2004 ftciteseerx 2016-01-08T10:37:28Z Vegetation mosaics of grassland and exposed soil are often the outcome of intense herbivory and represent alternate stable states, although the vegetational and soil processes that both initiate and maintain the states in response to herbivory are poorly understood. 2 The vegetation mosaic resulting from grubbing by geese was examined on the intertidal flats at La Pérouse Bay, Manitoba. Soil properties of the alternate states were measured in conjunction with the ability of transplanted tillers of Puccinellia phryganodes to grow in exposed soil and intact swards. Simulated grubbed patches (2.5–40 cm diameter) were prepared at three sites and the soil properties and inward clonal growth of the grass in each patch were examined during two growing seasons. 3 Where an organic layer was still present on exposed areas, soil properties were similar to those in the rooting zone beneath intact swards, except that soils were hyper-rather than hyposaline. Older exposed mineral soils, where the organic layer had been eroded, were similarly hypersaline, but were also low in soil moisture and total nitrogen, and compacted with a low infiltration rate. Transplanted tillers survived in intact swards, but few survived in any hypersaline soils. 4 Changes in soil properties over two seasons depended on size of experimentally created patches. Again, high salinities developed in soils of the larger patches, and there was a loss of nitrogen and soil moisture and an increase in bulk density with increasing patch size. Although inward clonal growth of P. phryganodes took place from plot perimeters, this is likely to be curtailed by high salinities in plots over 20 cm diameter. Text Puccinellia phryganodes Unknown La Pérouse Bay ENVELOPE(-93.416,-93.416,58.750,58.750) |
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Unknown |
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ftciteseerx |
language |
English |
topic |
Puccinellia phrygano |
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Puccinellia phrygano J. R. Mclaren R. L. Jefferies Summary |
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Puccinellia phrygano |
description |
Vegetation mosaics of grassland and exposed soil are often the outcome of intense herbivory and represent alternate stable states, although the vegetational and soil processes that both initiate and maintain the states in response to herbivory are poorly understood. 2 The vegetation mosaic resulting from grubbing by geese was examined on the intertidal flats at La Pérouse Bay, Manitoba. Soil properties of the alternate states were measured in conjunction with the ability of transplanted tillers of Puccinellia phryganodes to grow in exposed soil and intact swards. Simulated grubbed patches (2.5–40 cm diameter) were prepared at three sites and the soil properties and inward clonal growth of the grass in each patch were examined during two growing seasons. 3 Where an organic layer was still present on exposed areas, soil properties were similar to those in the rooting zone beneath intact swards, except that soils were hyper-rather than hyposaline. Older exposed mineral soils, where the organic layer had been eroded, were similarly hypersaline, but were also low in soil moisture and total nitrogen, and compacted with a low infiltration rate. Transplanted tillers survived in intact swards, but few survived in any hypersaline soils. 4 Changes in soil properties over two seasons depended on size of experimentally created patches. Again, high salinities developed in soils of the larger patches, and there was a loss of nitrogen and soil moisture and an increase in bulk density with increasing patch size. Although inward clonal growth of P. phryganodes took place from plot perimeters, this is likely to be curtailed by high salinities in plots over 20 cm diameter. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
J. R. Mclaren R. L. Jefferies |
author_facet |
J. R. Mclaren R. L. Jefferies |
author_sort |
J. R. Mclaren |
title |
Summary |
title_short |
Summary |
title_full |
Summary |
title_fullStr |
Summary |
title_full_unstemmed |
Summary |
title_sort |
summary |
publishDate |
2004 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.4025 http://research.amnh.org/~rfr/hbp/jenny.pdf |
long_lat |
ENVELOPE(-93.416,-93.416,58.750,58.750) |
geographic |
La Pérouse Bay |
geographic_facet |
La Pérouse Bay |
genre |
Puccinellia phryganodes |
genre_facet |
Puccinellia phryganodes |
op_source |
http://research.amnh.org/~rfr/hbp/jenny.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.531.4025 http://research.amnh.org/~rfr/hbp/jenny.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766174707116146688 |