The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.

Masters Thesis completed in 1993 by D.S. Srivastava at the University of Toronto. Supervised by Dr. R.L. Jefferies. A positive feedback cycle between soil salinity and graminoid growth, triggered by intensive grazing and grubbing by geese, is proposed to account for the loss of graminoid vegetation...

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Bibliographic Details
Main Author: Srivastava, Diane Sheila
Format: Thesis
Language:English
Published: 1993
Subjects:
soil salinity
graminoid growth
grazing
salt marsh
Manitoba
La Pérouse Bay
above-ground biomass
intraspecific competition
vegetation dynamics
positive feedback
grass
Graminoid
Arctic
Canada
Online Access:http://hdl.handle.net/10315/18774
id ftyorkuniv:oai:yorkspace.library.yorku.ca:10315/18774
record_format openpolar
spelling ftyorkuniv:oai:yorkspace.library.yorku.ca:10315/18774 2023-05-15T15:04:30+02:00 The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards. Srivastava, Diane Sheila 1993 application/pdf http://hdl.handle.net/10315/18774 en eng Thesis (M.Sc.) - University of Toronto. D.S. Srivastava: Theses Canada, 1993. (AMICUS No. 21557550) http://hdl.handle.net/10315/18774 http://creativecommons.org/licenses/by-nc-nd/2.5/ca/ CC-BY-NC-ND soil salinity graminoid growth grazing salt marsh Manitoba La Pérouse Bay above-ground biomass intraspecific competition vegetation dynamics positive feedback grass Graminoid Electronic Thesis or Dissertation 1993 ftyorkuniv 2022-08-22T13:05:25Z Masters Thesis completed in 1993 by D.S. Srivastava at the University of Toronto. Supervised by Dr. R.L. Jefferies. A positive feedback cycle between soil salinity and graminoid growth, triggered by intensive grazing and grubbing by geese, is proposed to account for the loss of graminoid vegetation in an arctic salt marsh (La Pérouse Bay, Manitoba, Canada) based on the results of experimental field studies. Decreases in above-ground biomass, caused by goose herbivory, increase soil salinity. High soil salinities further reduce graminoid growth, both in the salt marsh and under controlled conditions, causing additional decreases in above-ground biomass. Graminoid growth is also reduced by intraspecific competition. The implications of this positive feedback on vegetation dynamics and the size of the goose colony at La Perouse Bay are discussed. Thesis Arctic York University, Toronto: YorkSpace Arctic Canada La Pérouse Bay ENVELOPE(-93.416,-93.416,58.750,58.750)
institution Open Polar
collection York University, Toronto: YorkSpace
op_collection_id ftyorkuniv
language English
topic soil salinity
graminoid growth
grazing
salt marsh
Manitoba
La Pérouse Bay
above-ground biomass
intraspecific competition
vegetation dynamics
positive feedback
grass
Graminoid
spellingShingle soil salinity
graminoid growth
grazing
salt marsh
Manitoba
La Pérouse Bay
above-ground biomass
intraspecific competition
vegetation dynamics
positive feedback
grass
Graminoid
Srivastava, Diane Sheila
The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
topic_facet soil salinity
graminoid growth
grazing
salt marsh
Manitoba
La Pérouse Bay
above-ground biomass
intraspecific competition
vegetation dynamics
positive feedback
grass
Graminoid
description Masters Thesis completed in 1993 by D.S. Srivastava at the University of Toronto. Supervised by Dr. R.L. Jefferies. A positive feedback cycle between soil salinity and graminoid growth, triggered by intensive grazing and grubbing by geese, is proposed to account for the loss of graminoid vegetation in an arctic salt marsh (La Pérouse Bay, Manitoba, Canada) based on the results of experimental field studies. Decreases in above-ground biomass, caused by goose herbivory, increase soil salinity. High soil salinities further reduce graminoid growth, both in the salt marsh and under controlled conditions, causing additional decreases in above-ground biomass. Graminoid growth is also reduced by intraspecific competition. The implications of this positive feedback on vegetation dynamics and the size of the goose colony at La Perouse Bay are discussed.
format Thesis
author Srivastava, Diane Sheila
author_facet Srivastava, Diane Sheila
author_sort Srivastava, Diane Sheila
title The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
title_short The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
title_full The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
title_fullStr The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
title_full_unstemmed The role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
title_sort role of lesser snow geese in positive, degenerative feedback processes resulting in the destruction of salt-marsh swards.
publishDate 1993
url http://hdl.handle.net/10315/18774
long_lat ENVELOPE(-93.416,-93.416,58.750,58.750)
geographic Arctic
Canada
La Pérouse Bay
geographic_facet Arctic
Canada
La Pérouse Bay
genre Arctic
genre_facet Arctic
op_relation Thesis (M.Sc.) - University of Toronto. D.S. Srivastava: Theses Canada, 1993. (AMICUS No. 21557550)
http://hdl.handle.net/10315/18774
op_rights http://creativecommons.org/licenses/by-nc-nd/2.5/ca/
op_rightsnorm CC-BY-NC-ND
_version_ 1766336256750387200

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