Plant response to disturbance in a Mediterranean grassland: How many functional groups?
Identifieur interne : 00C493 ( Main/Exploration ); précédent : 00C492; suivant : 00C494Plant response to disturbance in a Mediterranean grassland: How many functional groups?
Auteurs : Sandra Lavorel [France] ; S. Mcintyre [Australie] ; Karl Grigulis [France, Australie]Source :
- Journal of Vegetation Science [ 1100-9233 ] ; 1999-10.
Descripteurs français
- Wicri :
- topic : Biomasse, écosystème, Surface en herbe.
English descriptors
- KwdEn :
- Actual combinations, Annual grassland, Annual pastures, Attribute, Autumn germination, Biological attributes, Biological diversity, Biomass, Block structure, Cambridge university press, Canopy, Canopy structure, Cattle exclosure, Different attributes, Different sites, Dispersal, Disturbance, Disturbance response, Disturbance treatments, Disturbance types, Dormancy, Ecol, Ecological, Ecological systems, Ecosystem, Ecosystem properties, Evolutionary history, Exclosed, Exclosed plots, Exclosure, Exclosures, Exclosures favoured, Favour, Favoured, Favoured species, Field site, Flat habit, Flora, Forb, Forb group, Forb species, Forbs, Functional groups, Functional traits, Functional types, Gitay, Global change, Grass attributes, Grass component, Grass group, Grassland, Group favoured, Heavy seeds, Herbaceous communities, High dormancy, Individual traits, Landscape scale, Large herbivores, Large rosettes, Large species, Lateral, Lateral spread, Lavorel, Leafy, Legume, Life forms, Light seeds, Logarithmic transformation, Mcintyre, Mediterranean, Mediterranean grassland, Medium height, Moderate dormancy, Morphology, Other hand, Partial densities, Partial species densities, Partial species density, Particular disturbance, Plant response, Plant size, Plant strategies, Ploughed, Ploughed plots, Ploughing, Ploughing favour species, Ploughing favoured grasses, Ploughing treatments, Portuguese pasture, Previous studies, Productive species, Regeneration, Regeneration attributes, Regeneration strategies, Regional scale, Relative frequencies, Relative species density, Response group, Response groups, Rosette, Rosette canopy, Rosette canopy structure, Rosette morphology, Rosette species, Seed bank, Seed dormancy, Seed sources, Seed weight, Sensitive species, Short duration, Significant changes, Significant differences, Small rosette group, Small rosettes, Small seeds, Small size, Small species, Soil disturbance, Species composition, Species favoured, Species richness, Species traits, Standard deviation values, Summer drought, Syndrome, Tall height, Tall species, Total biomass, Total species richness, Trait, Treatment levels, Trends ecol, Undisturbed plots, Ungrazed, Unploughed, Vegetation, Vegetation composition, Woodward cramer.
- Teeft :
- Actual combinations, Annual grassland, Annual pastures, Attribute, Autumn germination, Biological attributes, Biological diversity, Biomass, Block structure, Cambridge university press, Canopy, Canopy structure, Cattle exclosure, Different attributes, Different sites, Dispersal, Disturbance, Disturbance response, Disturbance treatments, Disturbance types, Dormancy, Ecol, Ecological, Ecological systems, Ecosystem, Ecosystem properties, Evolutionary history, Exclosed, Exclosed plots, Exclosure, Exclosures, Exclosures favoured, Favour, Favoured, Favoured species, Field site, Flat habit, Flora, Forb, Forb group, Forb species, Forbs, Functional groups, Functional traits, Functional types, Gitay, Global change, Grass attributes, Grass component, Grass group, Grassland, Group favoured, Heavy seeds, Herbaceous communities, High dormancy, Individual traits, Landscape scale, Large herbivores, Large rosettes, Large species, Lateral, Lateral spread, Lavorel, Leafy, Legume, Life forms, Light seeds, Logarithmic transformation, Mcintyre, Mediterranean, Mediterranean grassland, Medium height, Moderate dormancy, Morphology, Other hand, Partial densities, Partial species densities, Partial species density, Particular disturbance, Plant response, Plant size, Plant strategies, Ploughed, Ploughed plots, Ploughing, Ploughing favour species, Ploughing favoured grasses, Ploughing treatments, Portuguese pasture, Previous studies, Productive species, Regeneration, Regeneration attributes, Regeneration strategies, Regional scale, Relative frequencies, Relative species density, Response group, Response groups, Rosette, Rosette canopy, Rosette canopy structure, Rosette morphology, Rosette species, Seed bank, Seed dormancy, Seed sources, Seed weight, Sensitive species, Short duration, Significant changes, Significant differences, Small rosette group, Small rosettes, Small seeds, Small size, Small species, Soil disturbance, Species composition, Species favoured, Species richness, Species traits, Standard deviation values, Summer drought, Syndrome, Tall height, Tall species, Total biomass, Total species richness, Trait, Treatment levels, Trends ecol, Undisturbed plots, Ungrazed, Unploughed, Vegetation, Vegetation composition, Woodward cramer.
Abstract
Abstract. Data referring to changes in vegetation composition resulting from cattle exclosure and ploughing in a Portuguese pasture dominated by annuals were used to test hypotheses regarding the biology of species favoured or eliminated by disturbance in semi‐natural herbaceous communities. These hypotheses were tested in two ways. First we compared the distribution of six a priori groups – grasses, small rosettes, large rosettes, small species with leafy stems, large species with leafy stems, legumes – across grazed, ploughed and undisturbed plots. In a second set of analyses we examined changes in the frequencies of individual biological attributes in response to grazing and ploughing. These analyses were carried out separately for grasses and dicot forbs. Overall, the species composition showed little response to either grazing or ploughing, though species dominance changed. This lack of responsiveness of species composition was attributed to the long history of intensive land use which has resulted in the loss of disturbance‐intolerant species over entire landscapes.
Url:
DOI: 10.2307/3237081
Affiliations:
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Le document en format XML
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<term>Annual grassland</term>
<term>Annual pastures</term>
<term>Attribute</term>
<term>Autumn germination</term>
<term>Biological attributes</term>
<term>Biological diversity</term>
<term>Biomass</term>
<term>Block structure</term>
<term>Cambridge university press</term>
<term>Canopy</term>
<term>Canopy structure</term>
<term>Cattle exclosure</term>
<term>Different attributes</term>
<term>Different sites</term>
<term>Dispersal</term>
<term>Disturbance</term>
<term>Disturbance response</term>
<term>Disturbance treatments</term>
<term>Disturbance types</term>
<term>Dormancy</term>
<term>Ecol</term>
<term>Ecological</term>
<term>Ecological systems</term>
<term>Ecosystem</term>
<term>Ecosystem properties</term>
<term>Evolutionary history</term>
<term>Exclosed</term>
<term>Exclosed plots</term>
<term>Exclosure</term>
<term>Exclosures</term>
<term>Exclosures favoured</term>
<term>Favour</term>
<term>Favoured</term>
<term>Favoured species</term>
<term>Field site</term>
<term>Flat habit</term>
<term>Flora</term>
<term>Forb</term>
<term>Forb group</term>
<term>Forb species</term>
<term>Forbs</term>
<term>Functional groups</term>
<term>Functional traits</term>
<term>Functional types</term>
<term>Gitay</term>
<term>Global change</term>
<term>Grass attributes</term>
<term>Grass component</term>
<term>Grass group</term>
<term>Grassland</term>
<term>Group favoured</term>
<term>Heavy seeds</term>
<term>Herbaceous communities</term>
<term>High dormancy</term>
<term>Individual traits</term>
<term>Landscape scale</term>
<term>Large herbivores</term>
<term>Large rosettes</term>
<term>Large species</term>
<term>Lateral</term>
<term>Lateral spread</term>
<term>Lavorel</term>
<term>Leafy</term>
<term>Legume</term>
<term>Life forms</term>
<term>Light seeds</term>
<term>Logarithmic transformation</term>
<term>Mcintyre</term>
<term>Mediterranean</term>
<term>Mediterranean grassland</term>
<term>Medium height</term>
<term>Moderate dormancy</term>
<term>Morphology</term>
<term>Other hand</term>
<term>Partial densities</term>
<term>Partial species densities</term>
<term>Partial species density</term>
<term>Particular disturbance</term>
<term>Plant response</term>
<term>Plant size</term>
<term>Plant strategies</term>
<term>Ploughed</term>
<term>Ploughed plots</term>
<term>Ploughing</term>
<term>Ploughing favour species</term>
<term>Ploughing favoured grasses</term>
<term>Ploughing treatments</term>
<term>Portuguese pasture</term>
<term>Previous studies</term>
<term>Productive species</term>
<term>Regeneration</term>
<term>Regeneration attributes</term>
<term>Regeneration strategies</term>
<term>Regional scale</term>
<term>Relative frequencies</term>
<term>Relative species density</term>
<term>Response group</term>
<term>Response groups</term>
<term>Rosette</term>
<term>Rosette canopy</term>
<term>Rosette canopy structure</term>
<term>Rosette morphology</term>
<term>Rosette species</term>
<term>Seed bank</term>
<term>Seed dormancy</term>
<term>Seed sources</term>
<term>Seed weight</term>
<term>Sensitive species</term>
<term>Short duration</term>
<term>Significant changes</term>
<term>Significant differences</term>
<term>Small rosette group</term>
<term>Small rosettes</term>
<term>Small seeds</term>
<term>Small size</term>
<term>Small species</term>
<term>Soil disturbance</term>
<term>Species composition</term>
<term>Species favoured</term>
<term>Species richness</term>
<term>Species traits</term>
<term>Standard deviation values</term>
<term>Summer drought</term>
<term>Syndrome</term>
<term>Tall height</term>
<term>Tall species</term>
<term>Total biomass</term>
<term>Total species richness</term>
<term>Trait</term>
<term>Treatment levels</term>
<term>Trends ecol</term>
<term>Undisturbed plots</term>
<term>Ungrazed</term>
<term>Unploughed</term>
<term>Vegetation</term>
<term>Vegetation composition</term>
<term>Woodward cramer</term>
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<term>Annual grassland</term>
<term>Annual pastures</term>
<term>Attribute</term>
<term>Autumn germination</term>
<term>Biological attributes</term>
<term>Biological diversity</term>
<term>Biomass</term>
<term>Block structure</term>
<term>Cambridge university press</term>
<term>Canopy</term>
<term>Canopy structure</term>
<term>Cattle exclosure</term>
<term>Different attributes</term>
<term>Different sites</term>
<term>Dispersal</term>
<term>Disturbance</term>
<term>Disturbance response</term>
<term>Disturbance treatments</term>
<term>Disturbance types</term>
<term>Dormancy</term>
<term>Ecol</term>
<term>Ecological</term>
<term>Ecological systems</term>
<term>Ecosystem</term>
<term>Ecosystem properties</term>
<term>Evolutionary history</term>
<term>Exclosed</term>
<term>Exclosed plots</term>
<term>Exclosure</term>
<term>Exclosures</term>
<term>Exclosures favoured</term>
<term>Favour</term>
<term>Favoured</term>
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<term>Field site</term>
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<term>Forb</term>
<term>Forb group</term>
<term>Forb species</term>
<term>Forbs</term>
<term>Functional groups</term>
<term>Functional traits</term>
<term>Functional types</term>
<term>Gitay</term>
<term>Global change</term>
<term>Grass attributes</term>
<term>Grass component</term>
<term>Grass group</term>
<term>Grassland</term>
<term>Group favoured</term>
<term>Heavy seeds</term>
<term>Herbaceous communities</term>
<term>High dormancy</term>
<term>Individual traits</term>
<term>Landscape scale</term>
<term>Large herbivores</term>
<term>Large rosettes</term>
<term>Large species</term>
<term>Lateral</term>
<term>Lateral spread</term>
<term>Lavorel</term>
<term>Leafy</term>
<term>Legume</term>
<term>Life forms</term>
<term>Light seeds</term>
<term>Logarithmic transformation</term>
<term>Mcintyre</term>
<term>Mediterranean</term>
<term>Mediterranean grassland</term>
<term>Medium height</term>
<term>Moderate dormancy</term>
<term>Morphology</term>
<term>Other hand</term>
<term>Partial densities</term>
<term>Partial species densities</term>
<term>Partial species density</term>
<term>Particular disturbance</term>
<term>Plant response</term>
<term>Plant size</term>
<term>Plant strategies</term>
<term>Ploughed</term>
<term>Ploughed plots</term>
<term>Ploughing</term>
<term>Ploughing favour species</term>
<term>Ploughing favoured grasses</term>
<term>Ploughing treatments</term>
<term>Portuguese pasture</term>
<term>Previous studies</term>
<term>Productive species</term>
<term>Regeneration</term>
<term>Regeneration attributes</term>
<term>Regeneration strategies</term>
<term>Regional scale</term>
<term>Relative frequencies</term>
<term>Relative species density</term>
<term>Response group</term>
<term>Response groups</term>
<term>Rosette</term>
<term>Rosette canopy</term>
<term>Rosette canopy structure</term>
<term>Rosette morphology</term>
<term>Rosette species</term>
<term>Seed bank</term>
<term>Seed dormancy</term>
<term>Seed sources</term>
<term>Seed weight</term>
<term>Sensitive species</term>
<term>Short duration</term>
<term>Significant changes</term>
<term>Significant differences</term>
<term>Small rosette group</term>
<term>Small rosettes</term>
<term>Small seeds</term>
<term>Small size</term>
<term>Small species</term>
<term>Soil disturbance</term>
<term>Species composition</term>
<term>Species favoured</term>
<term>Species richness</term>
<term>Species traits</term>
<term>Standard deviation values</term>
<term>Summer drought</term>
<term>Syndrome</term>
<term>Tall height</term>
<term>Tall species</term>
<term>Total biomass</term>
<term>Total species richness</term>
<term>Trait</term>
<term>Treatment levels</term>
<term>Trends ecol</term>
<term>Undisturbed plots</term>
<term>Ungrazed</term>
<term>Unploughed</term>
<term>Vegetation</term>
<term>Vegetation composition</term>
<term>Woodward cramer</term>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Biomasse</term>
<term>écosystème</term>
<term>Surface en herbe</term>
</keywords>
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<front><div type="abstract">Abstract. Data referring to changes in vegetation composition resulting from cattle exclosure and ploughing in a Portuguese pasture dominated by annuals were used to test hypotheses regarding the biology of species favoured or eliminated by disturbance in semi‐natural herbaceous communities. These hypotheses were tested in two ways. First we compared the distribution of six a priori groups – grasses, small rosettes, large rosettes, small species with leafy stems, large species with leafy stems, legumes – across grazed, ploughed and undisturbed plots. In a second set of analyses we examined changes in the frequencies of individual biological attributes in response to grazing and ploughing. These analyses were carried out separately for grasses and dicot forbs. Overall, the species composition showed little response to either grazing or ploughing, though species dominance changed. This lack of responsiveness of species composition was attributed to the long history of intensive land use which has resulted in the loss of disturbance‐intolerant species over entire landscapes.</div>
</front>
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