i mpact of turfgrass management on collembola diversity and abundance sophie rochefort
TRANSCRIPT
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Impact of turfgrass management on Collembola diversity and
abundance
Impact of turfgrass management on Collembola diversity and
abundance
Sophie RochefortSophie Rochefort
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Brocklehurst K. (1999)
CollembolaCollembola• One of the most abundant group of arthropods in the soil
Up to several millions of individual / m2
• Play different ecological roles: Decomposer, predator, prey, fungivore, soil ‘engineer’
• Found in every ecosystems
• Very susceptible to humidity andtemperature
• Bio indicator species
• One of the most abundant group of arthropods in the soil
Up to several millions of individual / m2
• Play different ecological roles: Decomposer, predator, prey, fungivore, soil ‘engineer’
• Found in every ecosystems
• Very susceptible to humidity andtemperature
• Bio indicator species
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EpedaphicEpedaphic
HemiedaphicHemiedaphic
EuedaphicEuedaphic
Collembola colonize different microhabitats in turfgrass ecosystemsCollembola colonize different
microhabitats in turfgrass ecosystems
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IntroductionIntroduction
Previous studies :(Vavrek & Niemczyk, 1990 ; Braman & Pendley, 1993 ; Byrne & Bruns, 2005)
Effect of pesticides or turf management on Collembola families or specific « groups ».
Previous studies :(Vavrek & Niemczyk, 1990 ; Braman & Pendley, 1993 ; Byrne & Bruns, 2005)
Effect of pesticides or turf management on Collembola families or specific « groups ».
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ObjectivesObjectivesTo characterize, to species level, the composition of Collembolan communityTo characterize, to species level, the composition of Collembolan community
To determine the seasonal abundance of the most abundant speciesTo determine the seasonal abundance of the most abundant species
To compare the abundance and the diversity of Collembola between a newly established lawn and a 10 year-old lawn
To compare the abundance and the diversity of Collembola between a newly established lawn and a 10 year-old lawn
To evaluate the impact of turfgrass management on Collembolan communityTo evaluate the impact of turfgrass management on Collembolan community
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Study sites
Laval University
• New turfgrass lawn established in 2003
• 100% of Kentucky bluegrass
Municipal site
• 10 year-old lawn
• High density of broadleaf weeds
• Only mowing for the last 5 years
Study period: 2003-2005
Study sites
Laval University
• New turfgrass lawn established in 2003
• 100% of Kentucky bluegrass
Municipal site
• 10 year-old lawn
• High density of broadleaf weeds
• Only mowing for the last 5 years
Study period: 2003-2005
Materials and MethodsMaterials and Methods
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Experimental design
Plot size: 8 x 12 m (96 m2)
• Buffer zone of 2 m between plots
Randomized complete blocks design
• 5 blocks per site x 4 treatments
• A total of 20 plots / site
Experimental design
Plot size: 8 x 12 m (96 m2)
• Buffer zone of 2 m between plots
Randomized complete blocks design
• 5 blocks per site x 4 treatments
• A total of 20 plots / site
Three organic fertilizer (9-2-5) applications per year for an annual rate of 1.25 kg N / 100 m2
Three organic fertilizer (9-2-5) applications per year for an annual rate of 1.25 kg N / 100 m2
Materials and MethodsMaterials and Methods
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TreatmentsT1-Pest management with pesticides 2-3 herbicides / year
1 diazinon in July1 carbaryl in August
T2-Control: Only fertilization
T3-Integrated pest management Pest monitoring
Local herbicide and insecticide treatments when needed2 aerations / year
T4- "Ecological" management Pest monitoring
2 aerations / year
Corn gluten meal in May and September
MAC1: Sclerotinia minor
Alternative methods only for insect control
TreatmentsT1-Pest management with pesticides 2-3 herbicides / year
1 diazinon in July1 carbaryl in August
T2-Control: Only fertilization
T3-Integrated pest management Pest monitoring
Local herbicide and insecticide treatments when needed2 aerations / year
T4- "Ecological" management Pest monitoring
2 aerations / year
Corn gluten meal in May and September
MAC1: Sclerotinia minor
Alternative methods only for insect control
Materials and MethodsMaterials and Methods
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Materials and MethodsMaterials and MethodsSoil sampling:
• 3 samples / plot
Sampling frequency:
• Once a month from May to October• 6 sampling periods
Soil sampling:
• 3 samples / plot
Sampling frequency:
• Once a month from May to October• 6 sampling periods
Collembola extraction• Berlese funnels (72 h)
Species identification • Christiansen & Bellinger (1998)• Potapov (2000)
Collembola extraction• Berlese funnels (72 h)
Species identification • Christiansen & Bellinger (1998)• Potapov (2000)
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ResultsResultsAbundance
•University site
2003 22 328 individuals
2004 41 213 individuals
2005 46 258 individuals
•Municipal site
2003 19 557 individuals
2004 7 131 individuals
2005 11 240 individuals
Abundance•University site
2003 22 328 individuals
2004 41 213 individuals
2005 46 258 individuals
•Municipal site
2003 19 557 individuals
2004 7 131 individuals
2005 11 240 individuals
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ResultsResults21 species representing 17 genera and 9 families
University site: 11-15 species
Municipal site: 13-19 species
21 species representing 17 genera and 9 families
University site: 11-15 species
Municipal site: 13-19 species
4 new mentions for Quebec fauna:
Brachystomella parvula
Mesaphorura simplex
Isotomodes productus
Shaeridia pumilis
4 new mentions for Quebec fauna:
Brachystomella parvula
Mesaphorura simplex
Isotomodes productus
Shaeridia pumilis
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Family Species Sampling year
2003 2004
Brachystomellidae Brachystomella parvulaBrachystomella parvula 1 092 ± 194 639 ± 178
Onychiuridae Protaphorura armataProtaphorura armata 0 100 ± 66
Tullbergiidae Mesaphorura macrocheataMesaphorura macrocheata 0 22 ± 13
Isotomidae Isotoma viridisIsotoma viridis 10 542 ± 3 961 1 778 ± 3 278
Parisotoma notabilisParisotoma notabilis 7 192 ± 1 877 17 644 ± 2 272
Cryptopygus thermophilusCryptopygus thermophilus 3 658 ± 1 264 4 672 ± 1 207
Isotomodes productusIsotomodes productus 0 61 ± 61
Isotomiella minorIsotomiella minor 25 ± 18 22 ± 13
Entomobryidae Pseudosinella violentaPseudosinella violenta 758 ± 221 956 ± 253
Pseudosinella albaPseudosinella alba 0 667 ± 199
Lepidocyrtus violaceusLepidocyrtus violaceus 758 ± 221 3 906 ± 996
Lepidocyrtus fernandiLepidocyrtus fernandi 292 ± 94 2 356 ± 600
Bourlettiellidae Bourletiella arvalisBourletiella arvalis 208 ± 111 11 ± 11
Katiannidae Sminthurinus elegansSminthurinus elegans 1 017 ± 137 2 217 ± 460
Sminthurididae Shaeridia pumilisShaeridia pumilis 1 458 ± 430 872 ± 169
Mean abundance (±se) per m2 of Collembola species at the university site in 2003 and 2004.
Mean abundance (±se) per m2 of Collembola species at the university site in 2003 and 2004.
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Family Species Sampling year
2003 2004
Brachystomellidae Brachystomella parvulaBrachystomella parvula 1 489 1 489 ± 417± 417 211 ± 41211 ± 41
Neanuridae Anurida sp.Anurida sp. 00 6 ± 66 ± 6
Onychiuridae Protaphorura armataProtaphorura armata 200 200 ± 173± 173 1 244 ± 5521 244 ± 552
Tullbergiidae Mesaphorura simplexMesaphorura simplex 00 6 ± 66 ± 6
Mesaphorura silvicolaMesaphorura silvicola 6 ± 66 ± 6 11 ± 811 ± 8
Isotomidae Isotoma viridisIsotoma viridis 3 656 ± 6593 656 ± 659 2 656 ± 6882 656 ± 688
Parisotoma notabilisParisotoma notabilis 1 950 ± 7411 950 ± 741 750 ± 313750 ± 313
Cryptopygus thermophilusCryptopygus thermophilus 7 744 ± 3 2327 744 ± 3 232 2 239 ± 4992 239 ± 499
Folsomia Folsomia nearnear bisetosa bisetosa 372 372 ± 350± 350 244 ± 233244 ± 233
Folsomia candidaFolsomia candida 00 78 ± 7878 ± 78
Folsomia parvulusFolsomia parvulus 00 11 ± 811 ± 8
Isotomiella minorIsotomiella minor 00 22 ± 1322 ± 13
Entomobryidae Pseudosinella violentaPseudosinella violenta 44 ± 1844 ± 18 6 ± 66 ± 6
Pseudosinella albaPseudosinella alba 00 211 ± 71211 ± 71
Lepidocyrtus violaceusLepidocyrtus violaceus 200 ± 112200 ± 112 44 ± 1944 ± 19
Lepidocyrtus fernandiLepidocyrtus fernandi 67 ± 2067 ± 20 117 ± 39117 ± 39
Bourlettiellidae Bourletiella arvalisBourletiella arvalis 439 ± 173439 ± 173 172 ± 95172 ± 95
Katiannidae Sminthurinus elegansSminthurinus elegans 1 850 ± 8251 850 ± 825 500 ± 127500 ± 127
Sminthurididae Shaeridia pumilisShaeridia pumilis 1 617 ± 6271 617 ± 627 478 ± 163478 ± 163
Mean abundance (±se) per m2 of Collembola species at the municipal site in 2003 and 2004.
Mean abundance (±se) per m2 of Collembola species at the municipal site in 2003 and 2004.
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Isotoma viridisIsotoma viridis
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Diversity
Turfgrass 21 species
Grassland 16-32 species (Winkler et Kampichler, 2000)
Forest 75-90 species (Chagnon et al., 2000; Addison et al.,2003)
Agriculture 10-26 species (Axelsen et Kristensen, 2000)
Diversity
Turfgrass 21 species
Grassland 16-32 species (Winkler et Kampichler, 2000)
Forest 75-90 species (Chagnon et al., 2000; Addison et al.,2003)
Agriculture 10-26 species (Axelsen et Kristensen, 2000)
Collembola diversity between sites
•Similar; same dominant species
•Seeded vs soded lawn
Collembola diversity between sites
•Similar; same dominant species
•Seeded vs soded lawn
DiscussionDiscussion
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DiscussionDiscussion
Seasonal abundance: no clear patterns
• Also observed in other ecosystemsWolters (1998), Chagnon et al. (2000) et Renaud et al. (2004)
• Factors that could explain this phenomena?
Seasonal abundance: no clear patterns
• Also observed in other ecosystemsWolters (1998), Chagnon et al. (2000) et Renaud et al. (2004)
• Factors that could explain this phenomena?
Podura aquatica
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Impact of turfgrass management
Different patterns:•Between years
•Between species
•Between sites
•Between chemical products
Short vs long term effects
Ecological factors vs pesticide treatments
Impact of turfgrass management
Different patterns:•Between years
•Between species
•Between sites
•Between chemical products
Short vs long term effects
Ecological factors vs pesticide treatments
DiscussionDiscussion
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AckowledgementsAckowledgements
Fernand Therrien Christian Hébert
Annie-Ève Gagnon Simon Boudreault
Roselyne Labbé David Shetlar
Luc Lamontagne Jacques Brodeur
Fernand Therrien Christian Hébert
Annie-Ève Gagnon Simon Boudreault
Roselyne Labbé David Shetlar
Luc Lamontagne Jacques Brodeur
Ville de Québec FRÉU
FQRNT
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Questions ?Questions ?
Lasius pallitarsis Lasius pallitarsis © Alex Wild 2005 © Alex Wild 2005
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Why Isotomidae family is the most abundant?
Epedaphic and hemiedaphic Collembola
Why Isotomidae family is the most abundant?
Epedaphic and hemiedaphic Collembola
FeutreThatchThatch
DiscussionDiscussion
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