[Source_Name: Short_Name='FIELD INVESTIGATION']
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Diversity Changes in Soil Mesofauna (Springtails and Oribatid Mites) in the Subarctic (Abisko Swedish Lapland) Entry ID: SOIL_INVERTEBRATES_ARCTIC_KRAB_IPY213_NL |
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Summary
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Abstract:
Northern peatlands have been globally important accumulators of carbon as plant litter and older soil organic matter. As climate changes, the decomposition rates of these peatlands and consequently their soil respiration are likely to increase. In other words, CO2 emissions from northern peatlands might increase, giving feedback to global warming. This change might be caused not only by higher metabolic rates due to temperature rise and effects of increased precipitation, but also by changes in the diversity of the microbial community and soil fauna, the actual decomposers. The latter only contribute less than 10% to the total soil metabolism, but soil invertebrates have a great impact on the decomposition process. However the actual impact of soil mesofauna in subarctic peatlands has hardly been investigated. This project deals with diversity changes in soil mesofauna (represented by springtails and oribatid mites) in the subarctic (Abisko Swedish Lapland). Does diversity change due to global warming? And if the diversity changes, what are the impacts on ecosystem processes such as decomposition? To answer these questions I study interactions between soil invertebrates and their substrate, dead plant material. In one of my experiments, with MSc student Hilde Oorsprong, I study the vertical stratification of soil invertebrates in subarctic peatlands. In stratified peatlands, assemblages of soil fauna may have specific effects on the decomposition process dependent on their vertical distribution. Therefore, to understand the function of soil biota on ecosystem processes such as decomposition, knowledge of factors determining the vertical stratification of these animals should be obtained. It is known that many factors are responsible for the vertical stratification of soil fauna. The combined action of biotic factors such as quality of the substrate and abiotic factors such as temperature and humidity will determine their distribution. Here I hypothesise that it is mainly the litter quality that determines the distribution of meso- and microarthropods (including collembola) in the profile. By turning peat moss cores upside-down, litter quality was reversed in the profile. Deeper litter layers will now be confronted with the abiotic factors that are present in more shallow litter layers and vice versa. What is the consequence for the soil fauna that live in these moss cushions? Will they migrate up or down in the upside-down profile, suggesting that quality is not the most important factor? Or will they stay where they originally were, indicating that litter quality is more important than temperature or humidity? The results of this study will not only be important for predicting distribution changes of soil invertebrates due to environmental change, but by extrapolating these results we can get a better understanding of impacts of changes in temperature, moisture or litter quality on ecosystem processes such as decomposition. |
Related URL
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Link:
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Link: VIEW PROFESSIONAL HOME PAGE |
Geographic Coverage
| N: 68.35 | S: 68.35 | E: 18.82 | W: 18.82 |
| Min Altitude: 340M | Max Altitude: 370M | Min Depth: 0 | Max Depth: 0.09M |
Data Set Citation
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Dataset Originator/Creator:
Eveline J. Krab
Dataset Title: Soil Invertebrates Arctic IPY 213 2008 |
Temporal Coverage
| Start Date: 2007-05-15 |
| Stop Date: 2007-08-05 |
Location Keywords
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CONTINENT
> EUROPE
> NORTHERN EUROPE
> SCANDINAVIA
> SWEDEN
GEOGRAPHIC REGION > ARCTIC GEOGRAPHIC REGION > POLAR |
Science Keywords
| AGRICULTURE >ANIMAL SCIENCE >ANIMAL ECOLOGY AND BEHAVIOR [Definition] |
| BIOSPHERE >TERRESTRIAL ECOSYSTEMS >ALPINE/TUNDRA [Definition] |
| BIOSPHERE >TERRESTRIAL ECOSYSTEMS >WETLANDS >PEATLANDS [Definition] |
ISO Topic Category
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BIOTA
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Platform
| FIELD INVESTIGATION [Information] |
Project
| IPY >INTERNATIONAL POLAR YEAR [Information] |
| ENVISNAR >Environmental baselines, Impacts on people in the Nordic Arctic Regions [Information] |
Quality
| Springtails were considered representative for the soil invertebrate community and were determined at species level. |
Access Constraints
| N/A |
Use Constraints
| Please contact Eva Krab for proper citation |
Keywords
| Ecology |
| Tullgren Funnel Fauna Extractor |
| Springtails |
| Sphagnum |
| Soil invertebrates |
| Experimental data |
| Abisko |
| Litter quality |
| Moisture gradient |
| Temperature gradient |
| IPY-NL |
Data Set Progress
| IN WORK |
Originating Center
| VU University Amsterdam, FALW, Systemsecology |
Data Center
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Netherlands National Polar Data Centre, Royal Netherlands Institute for Sea Research, Netherlands Organization for Scientific Research, Netherlands
[Information]
Data Center URL: http://www.nioz.nl/dmg
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Personnel
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EVA
KRAB Role: INVESTIGATOR Role: TECHNICAL CONTACT Role: DIF AUTHOR Phone: +31205983611 Email: eva.krab at falw.vu.nl Contact Address: De Boelenlaan 1085 City: Amsterdam Postal Code: 1081 HV Country: The Netherlands |
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HANS
CORNELISSEN Role: TECHNICAL CONTACT Phone: +31 (0)20 59 86962 Email: hans.cornelissen at ecology.falw.vu.nl Contact Address: De Boelelaan 1085 City: Amsterdam Postal Code: 1081 HV Country: The Netherlands |
Creation and Review Dates
DIF Creation Date:
2009-11-09
Last DIF Revision Date:
2012-04-20
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