d25219d3-fe11-4052-879a-eb2e15ca295c University of Salento Giorgio Mancinelli Associate Professor giorgio.mancinelli@unisalento.it https://orcid.org/0000-0002-5833-7322 National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Cristina Di Muri Research Fellow cristina.dimuri@iret.cnr.it https://orcid.org/0000-0003-4072-0662 National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Cristina Di Muri Research Fellow cristina.dimuri@iret.cnr.it https://orcid.org/0000-0003-4072-0662 University of Salento Giorgio Mancinelli Associate Professor giorgio.mancinelli@unisalento.it https://orcid.org/0000-0002-5833-7322 2022-06-30 Two geo-referenced datasets with carbon and nitrogen isotopic values of Procambarus clarkii in invaded inland waters resolved respectively at population- and individual-scale. The population-scale dataset consists of 160 δ13C and δ15N isotopic values of P. clarkii and its potential prey, including living and non-living primary producers and benthic invertebrates. The individual-scale dataset consists of 1,168 isotopic individual records of P. clarkii. The isotopic information included within the two datasets was gathered from 10 countries located in Europe, Asia, Africa, and North America, and from a total of 41 studies published between 2005 and 2021. Procambarus clarkii Red swamp crayfish Louisiana crayfish Invasive Alien Species Stable isotope Inland waters Trophic habits Trophic position Trophic niche This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. CC BY 4.0 DOI https://doi.org/10.48372/d25219d3-fe11-4052-879a-eb2e15ca295c Info and download page on LifeWatch Italy Data Portal https://data.lifewatchitaly.eu/handle/123456789/129785 The datasets gather isotopic values of P. clarkii and its potential prey (population-scale dataset only) in invaded lotic and lentic habitats of 10 countries located in Europe, Asia, Africa, and North America. Overall, the study sites were distributed over 27 locations in France mostly located in the Garonne floodplain, nine loations in the USA, seven in Japan, four in China and in Italy, two in Spain, and one in Hungary, Kenya, Portugal, and in the Netherlands. -180 180 90 -90 2000-11-01 2019-07-01 Species Procambarus clarkii Species Radix auricularia Species Stenopsyche marmorata Species Sparganium erectum Species Semisulcospira reiniana Species Riccia fluitans Species Potentilla anserina Species Pomacea maculata Species Phragmites australis Species Mentha aquatica Species Macrobrachium nipponense Species Hydrochara affinis Species Epophthalmia elegans Species Dreissena polymorpha Species Corbicula fluminea Species Cheumatopsyche analis Species Cipangopaludina chinensis Species Sinotaia quadrata Species Asellus aquaticus Species Anodonta anatina Species Gabbia longicornis Species Alisma plantago-aquatica Genus Spirogyra Genus Potamogeton Genus Poa Genus Myriophyllum Genus Gammarus Genus Ephydra Genus Echinogammarus Genus Dreissena Genus Corbicula Family Sialidae Family Lymnaeidae Family Culicidae Family Cyrenidae Family Chironomidae Family Asellidae Order Ephemeroptera Order Amphipoda Class Gastropoda University of Salento Giorgio Mancinelli Associate Professor giorgio.mancinelli@unisalento.it https://orcid.org/0000-0002-5833-7322 National Research Council (CNR), Institute of Research on Terrestrial Ecosystems (IRET) Cristina Di Muri Research Fellow cristina.dimuri@iret.cnr.it https://orcid.org/0000-0003-4072-0662 The Google Scholar engine was used to search for relevant publications using the keywords "Procambaus clarkii" and "stable isotopes" and a total of 651 publications were returned. Publications were individually inspected in order to identify those reporting tabular or graphical information on the isotopic values of the crayfish and of potential prey; 41 studies performed in both freshwater and transitional environments and published between 2005 and 2021 were ultimately selected. For data extraction, figures were digitised after a fivefold enlargement and converted to numerical form using the WebPlotDigitizer graph capture software. Only records with specified locations were included in the datasets. The location accuracy was checked using Google Earth and, when geographical coordinates were not explicit, the maps of the study sites were used to retrieve them from Google Earth. All geographic coordinates were converted to decimal degrees when not originally specified as such. A taxonomic check was additionally performed using the World Register of Marine Species, the GBIF Backbone Taxonomy, and the Integrated Taxonomic Information System to check the current accepted scientific names of all taxa included in the datasets.  Primary producers, including living (e.g. macrophytes, periphyton, etc.) and non-living (i.e. detritus) organisms were preferentially used as baseline species included in the aggregated dataset. In few instances, herbivorous gastropods, aquatic larval stages of insects, and other invertebrates occurring at the study sites and characterised by a trophic position = 2 were chosen (i.e. Stenopsyche marmorata, Macrobrachium nipponense, Ephydra sp., and Cheumatopsyche analis). Only in two cases, two species of vertebrate predators with a trophic position = 3 were included (i.e. Epophthalmia elegans and Hydrochara affinis). The Internal Joint Initiative of LifeWatch ERIC has developed five validation cases on Non-native and Invasive Species (NIS) to address a variety of ecological questions. The validation case "Functional biogeography of invasive species" aims at finding bioclimatic drivers to assess the variation of the trophic position of invasive crustaceans in non-native food webs. University of Salento Giorgio Mancinelli Associate Professor National Research Council (CNR), Research Institute on Terrestrial Ecosystems (IRET) Cristina Di Muri Research Fellow National Research Council (CNR), Research Institute on Terrestrial Ecosystems (IRET) Ilaria Rosati Data Manager LifeWatch ERIC Lucia Vaira Metadata Catalogue Manager Population-scale carbon and nitrogen isotopic signatures of Procambarus clarkii in invaded freshwater ecosystems csv catalogNumber Catalog Number An identifier (preferably unique) for the record within the data set or collection. number associatedReferences Associated References A list (concatenated and separated) of identifiers (publication, bibliographic reference, global unique identifier, URI) of literature associated with the Occurrence. country Country The name of the country or major administrative unit in which the Location occurs. locality Locality The specific description of the place. habitat Habitat A category or description of the habitat in which the Event occurred. eventDate Event Date The date-time or interval during which an Event occurred. For occurrences, this is the date-time when the event was recorded. Not suitable for a time in a geological context. nominalYear decimalLatitude Decimal Latitude The geographic latitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are north of the Equator, negative values are south of it. degree decimalLongitude Decimal Longitude The geographic longitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are east of the Greenwich Meridian, negative values are west of it. degree taxonName Taxon Name Name of the biological entity, taxonomic group, or lowest level of taxonomic rank that could be determined. establishmentMeans Establishment Means Statement about whether an organism or organisms have been introduced to a given place and time through the direct or indirect activity of modern humans (https://dwc.tdwg.org/em/#dwcem_e). trophicRole Trophic Role Statement specifying whether the species is a predator or a prey. d13C_VPDB_biota Enrichment with respect to Vienna Pee Dee Belemnite (VPDB) of carbon-13 {13C CAS 14762-74-4} {delta(13)C} in biota {biological entity specified elsewhere} by mass spectrometry The ratio of carbon 13 relative to carbon 12 in a biological organism identified elsewhere in the metadata, expressed in per mille and relative to the international reference Vienna Pee Dee Belemnite standard. permil SD_d13C_VPDB_biota Enrichment standard deviation of carbon-13 {13C CAS 14762-74-4} {delta(13)C} in biota {biological entity specified elsewhere} by mass spectrometry The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement. number d15N_biota Enrichment of nitrogen-15 {15N CAS 14390-96-6} {delta(15)N} in biota {biological entity specified elsewhere} by mass spectrometry The ratio of nitrogen 15 relative to nitrogen 14 in a biological organism identified elsewhere in the metadata, expressed in per mille and relative to atmospheric air. permil SD_d15N_biota Enrichment standard deviation of nitrogen-15 {15N CAS 14390-96-6} {delta(15)N} in biota {biological entity specified elsewhere} by mass spectrometry The square root of the average of the squares of deviations about the mean of a set of values of the specified measurement. number sampleSizeValue_d13C Sample Size Value d13C A numeric value for the measurement of the size (number of samples) in a sampling event for the isotope of the chemical element carbon. number sampleSizeValue_d15N Sample Size Value d15N A numeric value for the measurement of the size (number of samples) in a sampling event for the isotope of the chemical element nitrogen. number trophicLevel Trophic Level Any of the feeding levels through which the passage of energy through an ecosystem proceeds; examples are photosynthetic plants, herbivorous animals, and microorganisms of decay. Individual-scale carbon and nitrogen isotopic signatures of Procambarus clarkii in invaded freshwater ecosystems csv catalogNumber Catalog Number An identifier (preferably unique) for the record within the data set or collection. number associatedReferences Associated References A list (concatenated and separated) of identifiers (publication, bibliographic reference, global unique identifier, URI) of literature associated with the Occurrence. country Country The name of the country or major administrative unit in which the Location occurs. locality Locality The specific description of the place. habitat Habitat A category or description of the habitat in which the Event occurred. eventDate Event Date The date-time or interval during which an Event occurred. For occurrences, this is the date-time when the event was recorded. Not suitable for a time in a geological context. nominalYear scientificName Scientific Name The full scientific name, with authorship and date information if known. When forming part of an Identification, this should be the name in lowest level taxonomic rank that can be determined. This term should not contain identification qualifications, which should instead be supplied in the IdentificationQualifier term. decimalLatitude Decimal Latitude The geographic latitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are north of the Equator, negative values are south of it. degree decimalLongitude Decimal Longitude The geographic longitude (in decimal degrees, using the spatial reference system given in geodeticDatum) of the geographic center of a Location. Positive values are east of the Greenwich Meridian, negative values are west of it. degree d13C_VPDB_biota Enrichment with respect to Vienna Pee Dee Belemnite (VPDB) of carbon-13 {13C CAS 14762-74-4} {delta(13)C} in biota {biological entity specified elsewhere} by mass spectrometry The ratio of carbon 13 relative to carbon 12 in a biological organism identified elsewhere in the metadata, expressed in per mille and relative to the international reference Vienna Pee Dee Belemnite standard. permil d15N_biota Enrichment of nitrogen-15 {15N CAS 14390-96-6} {delta(15)N} in biota {biological entity specified elsewhere} by mass spectrometry. The ratio of nitrogen 15 relative to nitrogen 14 in a biological organism identified elsewhere in the metadata expressed in per mille and relative to atmospheric air. permil