| 1. |
- Mikkelsen, T N, et al.
(author)
-
Experimental design of multifactor climate change experiments with elevated CO2, warming and drought: the CLIMAITE project
- 2008
-
In: Functional Ecology. - : Wiley. - 1365-2435 .- 0269-8463. ; 22:1, s. 185-195
-
Journal article (peer-reviewed)abstract
- Recent findings indicate that the interactions among CO2, temperature and water can be substantial, and that the combined effects on the biological systems of several factors may not be predicted from experiments with one or a few factors. Therefore realistic multifactorial experiments involving a larger set of main factors are needed. We describe a new Danish climate change-related field scale experiment, CLIMAITE, in a heath/grassland ecosystem. CLIMAITE is a full factorial combination of elevated CO2, elevated temperature and prolonged summer drought. The manipulations are intended to mimic anticipated major environmental changes at the site by year 2075 as closely as possible. The impacts on ecosystem processes and functioning (at ecophysiological levels, through responses by individuals and communities to ecosystem-level responses) are investigated simultaneously. The increase of [CO2] closely corresponds with the scenarios for year 2075, while the warming treatment is at the lower end of the predictions and seems to be the most difficult treatment to increase without unwanted side effects on the other variables. The drought treatment follows predictions of increased frequency of drought periods in summer. The combination of the treatments does not create new unwanted side effects on the treatments relative to the treatments alone.
|
|
| 2. |
- Phillips, Helen R. P., et al.
(author)
-
Global distribution of earthworm diversity
- 2019
-
In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 366:6464, s. 480-
-
Journal article (peer-reviewed)abstract
- Soil organisms, including earthworms, are a key component of terrestrial ecosystems. However, little is known about their diversity, their distribution, and the threats affecting them. We compiled a global dataset of sampled earthworm communities from 6928 sites in 57 countries as a basis for predicting patterns in earthworm diversity, abundance, and biomass. We found that local species richness and abundance typically peaked at higher latitudes, displaying patterns opposite to those observed in aboveground organisms. However, high species dissimilarity across tropical locations may cause diversity across the entirety of the tropics to be higher than elsewhere. Climate variables were found to be more important in shaping earthworm communities than soil properties or habitat cover. These findings suggest that climate change may have serious implications for earthworm communities and for the functions they provide.
|
|
| 3. |
- Potapov, Anton M., et al.
(author)
-
Global fine-resolution data on springtail abundance and community structure
- 2024
-
In: Scientific Data. - : Nature Publishing Group. - 2052-4463. ; 11:1
-
Journal article (peer-reviewed)abstract
- Springtails (Collembola) inhabit soils from the Arctic to the Antarctic and comprise an estimated ~32% of all terrestrial arthropods on Earth. Here, we present a global, spatially-explicit database on springtail communities that includes 249,912 occurrences from 44,999 samples and 2,990 sites. These data are mainly raw sample-level records at the species level collected predominantly from private archives of the authors that were quality-controlled and taxonomically-standardised. Despite covering all continents, most of the sample-level data come from the European continent (82.5% of all samples) and represent four habitats: woodlands (57.4%), grasslands (14.0%), agrosystems (13.7%) and scrublands (9.0%). We included sampling by soil layers, and across seasons and years, representing temporal and spatial within-site variation in springtail communities. We also provided data use and sharing guidelines and R code to facilitate the use of the database by other researchers. This data paper describes a static version of the database at the publication date, but the database will be further expanded to include underrepresented regions and linked with trait data.
|
|
| 4. |
- Bratthall, G., et al.
(author)
-
Comparison of ready-to-use EMDOGAIN®-gel and EMDOGAIN® in patients with chronic adult periodontitis. A multicenter clinical study
- 2001
-
In: Journal of Clinical Periodontology. - : John Wiley & Sons. - 0303-6979 .- 1600-051X. ; 28:10, s. 923-929
-
Journal article (peer-reviewed)abstract
- Objectives: The aim of this multicenter trial was to compare the clinical and radiographical outcome of a ready-to-use Emdogain®-gel (test) with the marketed Emdogain® (control). Methods: Subjects with bilateral infrabony defects ≥4 mm deep and ≥2 mm wide according to radiographs were selected. 88 subjects with probing pocket depth (PPD) ≥6 mm ≥1 month after supervised oral hygiene and scaling participated. At baseline plaque index, bleeding on probing, PPD and probing attachment level were recorded and reproducible radiographs for computer-based bone level measurements were taken. In each subject, 1 tooth was randomly treated with the test and 1 tooth with the control gel. Examinations were repeated 8 and 16 months post-operatively. Results: After 16 months, the mean test PPD was 4.1 mm and the mean control PPD 4.2 mm. The mean gain of attachment was 2.7 mm for test and 2.9 mm for the control sites, and the radiographic measurements demonstrated a mean gain of 1 mm for both test and control sites. Conclusion: This series of cases demonstrated a statistically significant reduction of pocket depths and gain of attachment and bone after 8 and 16 months with no difference between the 2 preparations.
|
|
| 5. |
- Potapov, Anton M., et al.
(author)
-
Globally invariant metabolism but density-diversity mismatch in springtails
- 2023
-
In: Nature Communications. - : Springer Nature. - 2041-1723. ; 14:1
-
Journal article (peer-reviewed)abstract
- Soil life supports the functioning and biodiversity of terrestrial ecosystems. Springtails (Collembola) are among the most abundant soil arthropods regulating soil fertility and flow of energy through above- and belowground food webs. However, the global distribution of springtail diversity and density, and how these relate to energy fluxes remains unknown. Here, using a global dataset representing 2470 sites, we estimate the total soil springtail biomass at 27.5 megatons carbon, which is threefold higher than wild terrestrial vertebrates, and record peak densities up to 2 million individuals per square meter in the tundra. Despite a 20-fold biomass difference between the tundra and the tropics, springtail energy use (community metabolism) remains similar across the latitudinal gradient, owing to the changes in temperature with latitude. Neither springtail density nor community metabolism is predicted by local species richness, which is high in the tropics, but comparably high in some temperate forests and even tundra. Changes in springtail activity may emerge from latitudinal gradients in temperature, predation and resource limitation in soil communities. Contrasting relationships of biomass, diversity and activity of springtail communities with temperature suggest that climate warming will alter fundamental soil biodiversity metrics in different directions, potentially restructuring terrestrial food webs and affecting soil functioning.
|
|
| 6. |
|
|
| 7. |
- Larsen, T, et al.
(author)
-
Orale bakterier og sygdomme udenfor mundhulen
- 2016
-
In: Tandlægebladet. - 0039-9353. ; 120:5, s. 436-441
-
Research review (peer-reviewed)abstract
- Orale bakterier og sygdomme i mundhulen er blevet kaedet sammen med en raekke forskelige infektöse og inflammatoriske sygdomme udenför mundhulen. Oprindeligt har der vaeret fokus på ekstraorale infektiooner, hvor orale bakterier direkte kan påvises, först og fremmest infektös endocarditis. Siden har interessen bredt sig til sygdomme med mulig faelles inflammatorisk baggrund, og hvor der er påvist epidemiologiske sammanhaenge som fx aterosklerose og diabetes mellitus. Denne artikel giver en oversigt over de mulige sammanhaenge mellem orale bakterier og inflammationsprocesser i mundhulen og sygdomme andre steder i organismen. Mulige mekanismer for en kausal sammanaeng beskrives, og graden af dokumentation for sammenhaeng med orale forhold i relation til de enkelte sygdomme vurderes
|
|
| 8. |
|
|
| 9. |
- Skuldbøl, T, et al.
(author)
-
Is pre-term labour associated with periodontitis in a Danish maternity ward?
- 2006
-
In: Journal of clinical periodontology. - 0303-6979. ; 33:3, s. 177-83
-
Journal article (peer-reviewed)abstract
- OBJECTIVES: To reveal differences in periodontal status and presence of subgingival bacteria in a Scandinavian population of women with pre-term birth compared with women who delivered at term. MATERIALS AND METHODS: Twenty-one women with pre-term labour (before week 35) and 33 women with term labour (between weeks 38 and 41) were included in this case-control study. Periodontal measurements included plaque index (PlI), probing pocket depth (PPD) and bleeding on probing (BOP). Inter-proximal distances from the cemento-enamel junction (CEJ) to the marginal bone crest (MBC) were measured on bitewing radiographs. In 31 patients (16 cases and 15 controls) the subgingival plaque was analysed using "checkerboard" DNA-DNA hybridization. RESULTS: Differences between the two examined groups were found related to "Twin births" (p=0.0064) and "Smokers" (p=0.03). None of the periodontal measurements showed any association. Significant differences were found concerning presence of Tannerella forsythensis, Treponema denticola, Peptostreptococcus micros, Streptococcus intermedius, Streptococcus oralis, Streptococcus sanguis and Capnocytophaga ochracea but when defining sites with >10(5) bacteria as heavily colonized, no statistical difference was found between the two groups. CONCLUSION: A relation between pre-term birth and periodontitis was not revealed in the present study.
|
|
