{"type": "FeatureCollection", "features": [{"id": "10.1016/j.envpol.2003.12.007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:49Z", "type": "Journal Article", "created": "2004-02-10", "title": "Earthworm Biomass As Additional Information For Risk Assessment Of Heavy Metal Biomagnification: A Case Study For Dredged Sediment-Derived Soils And Polluted Floodplain Soils", "description": "The important role of earthworms in the biomagnification of heavy metals in terrestrial ecosystems is widely recognised. Differences in earthworm biomass between sites is mostly not accounted for in ecological risk assessment. These differences may be large depending on soil properties and pollution status. A survey of earthworm biomass and colonisation rate was carried out on dredged sediment-derived soils (DSDS). Results were compared with observations for the surrounding alluvial plains. Mainly grain size distribution and time since disposal determined earthworm biomass on DSDS, while soil pollution status of the DSDS was of lesser importance. Highest earthworm biomass was observed on sandy loam DSDS disposed at least 40 years ago.", "keywords": ["LUMBRICUS-RUBELLUS", "Geologic Sediments", "Time Factors", "colonisation", "COPPER", "earthworms", "CONFINED DISPOSAL FACILITIES", "alluvial", "Risk Assessment", "01 natural sciences", "ECOLOGICAL RISK", "CADMIUM", "EISENIA-FETIDA", "Metals", " Heavy", "Animals", "Soil Pollutants", "landfills", "MICROORGANISMS", "Biomass", "Oligochaeta", "Ecosystem", "risk", "0105 earth and related environmental sciences", "Biology and Life Sciences", "04 agricultural and veterinary sciences", "CONTAMINATED SOILS", "15. Life on land", "ORGANIC-MATTER", "13. Climate action", "Earth and Environmental Sciences", "GROWTH", "0401 agriculture", " forestry", " and fisheries"]}, "links": [{"href": "https://doi.org/10.1016/j.envpol.2003.12.007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Pollution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envpol.2003.12.007", "name": "item", "description": "10.1016/j.envpol.2003.12.007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envpol.2003.12.007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-06-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2008.10.019", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:16:42Z", "type": "Journal Article", "created": "2008-11-09", "title": "Are Laboratory Derived Toxicity Results Informative For Field Situations? Case Study On Earthworm Populations Contaminated With Heavy Metals", "description": "The relevance of laboratory tests on toxicants for field situations is often disputed given that laboratory tests are conducted under, next to the toxicant stress, optimal conditions which are not expected in field situations. In this paper we confront the results of laboratory tests on growth, reproduction and survival of earthworms, in a polluted and a reference field soil with a field inventory of earthworms. The field inventory includes population density, biomass and demographic composition in life stages measured monthly over a period of one year. The field inventory showed that density and biomass was higher at the polluted field site, a result in conflict with the extrapolation of the laboratory tests that showed a decrease in population growth rate by 23% at this site compared to the reference. The field inventory and laboratory derived results agreed in the demographic composition of the population with more individuals in the younger age class at the polluted site compared to the reference. Abiotic and biotic conditions that differ between sites and could possibly explain the lower earthworm biomass and density at the reference site are discussed. We suggest that predation by the two to five times higher densities of meadow birds in spring may have caused the lower density and biomass of earthworms at the reference site.", "keywords": ["consequences", "eisenia-foetida oligochaeta", "growth", "temperature", "netherlands", "04 agricultural and veterinary sciences", "01 natural sciences", "soil", "lumbricus-rubellus", "reproduction", "godwit limosa-limosa", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "river floodplains", "0105 earth and related environmental sciences"], "contacts": [{"organization": "Klok, T.C., Thissen, J.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2008.10.019"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2008.10.019", "name": "item", "description": "10.1016/j.soilbio.2008.10.019", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2008.10.019"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-02-01T00:00:00Z"}}, {"id": "10.1128/aem.00033-11", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:19:02Z", "type": "Journal Article", "created": "2011-04-23", "title": "Association Of Earthworm-Denitrifier Interactions With Increased Emission Of Nitrous Oxide From Soil Mesocosms Amended With Crop Residue", "description": "ABSTRACT           <p>             Earthworm activity is known to increase emissions of nitrous oxide (N             2             O) from arable soils. Earthworm gut, casts, and burrows have exhibited higher denitrification activities than the bulk soil, implicating priming of denitrifying organisms as a possible mechanism for this effect. Furthermore, the earthworm feeding strategy may drive N             2             O emissions, as it determines access to fresh organic matter for denitrification. Here, we determined whether interactions between earthworm feeding strategy and the soil denitrifier community can predict N             2             O emissions from the soil. We set up a 90-day mesocosm experiment in which             15             N-labeled maize (             Zea mays             L.) was either mixed in or applied on top of the soil in the presence or absence of the epigeic earthworm             Lumbricus rubellus             and/or the endogeic earthworm             Aporrectodea caliginosa             . We measured N             2             O fluxes and tested the bulk soil for denitrification enzyme activity and the abundance of 16S rRNA and denitrifier genes             nirS             and             nosZ             through real-time quantitative PCR. Compared to the control,             L. rubellus             increased denitrification enzyme activity and N             2             O emissions on days 21 and 90 (day 21,             P             = 0.034 and             P             = 0.002, respectively; day 90,             P             = 0.001 and             P             = 0.007, respectively), as well as cumulative N             2             O emissions (76%;             P             = 0.014).             A. caliginosa             activity led to a transient increase of N             2             O emissions on days 8 to 18 of the experiment. Abundance of             nosZ             was significantly increased (100%) on day 90 in the treatment mixture containing             L. rubellus             alone. We conclude that             L. rubellus             increased cumulative N             2             O emissions by affecting denitrifier community activity via incorporation of fresh residue into the soil and supplying a steady, labile carbon source.           </p>", "keywords": ["2. Zero hunger", "agricultural soil", "Bacteria", "nosz genes", "carbon", "Nitrous Oxide", "n2o emission", "n2o-producing microorganisms", "04 agricultural and veterinary sciences", "15. Life on land", "pcr data", "microbial activity", "Animal Feed", "Zea mays", "lumbricus-rubellus", "Soil", "Denitrification", "Animals", "0401 agriculture", " forestry", " and fisheries", "community composition", "Oligochaeta", "organic-matter"]}, "links": [{"href": "https://doi.org/10.1128/aem.00033-11"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Applied%20and%20Environmental%20Microbiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1128/aem.00033-11", "name": "item", "description": "10.1128/aem.00033-11", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1128/aem.00033-11"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-06-15T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=LUMBRICUS-RUBELLUS&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=LUMBRICUS-RUBELLUS&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=LUMBRICUS-RUBELLUS&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=LUMBRICUS-RUBELLUS&offset=3", "hreflang": "en-US"}], "numberMatched": 3, "numberReturned": 3, "distributedFeatures": [], "timeStamp": "2026-07-27T12:51:45.453048Z"}