10.1594/PANGAEA.964066Engels, StefanStefanEngels0000-0002-2078-0361Cwynar, Les CLes CCwynarPANGAEA2023Chironomidslake depthSurface samplesUnited StatesEvent labelDate/Time of eventLatitude of eventLongitude of eventORDINAL NUMBERSample code/labelDEPTH, sediment/rockLake, water depth, maximumDepth, bathymetricAblabesmyiaThienemanniellaChironomus anthracinus-typeChironomus plumosus-typeCladopelma lateralis-typeCladotanytarsus mancus-typeCorynoneura edwardsi-typeCricotopus laricomalis-typeCricotopus cylindraceus-typeCricotopus trifasciatus-typeCricotopus obnixus-typeCricotopus bicinctus-typeCryptochironomusDemicryptochironomusDicrotendipes nervosus-typeEndochironomus albipennis-typeEndochironomus impar-typeEinfeldiaGeorthocladiusGlyptotendipes barbipes-typeGlyptotendipes severini-typeGymnometriocnemus/BryophaenocladiusHeterotanytarsusUnniellaHeterotrissocladius grimshawi-typeHeterotrissocladius marcidus-typeHeterotrissocladius subpilosus-typeLabrundiniaLauterborniella/ZavreliellaLimnophyesMicrotendipes pedellus-typeNanocladiusOliveridiaPagastiellaParametriocnemus/ParaphaenocladiusParachironomus vitiosus-typeParachironomus varus-typeParachironomus potamogeti-typeParacladopelmaParakiefferiella bathophila-typeParakiefferiella triquetra-typeParakiefferiella-type AParalauterborniellaParatanytarsus austriacus-typeParatanytarsus penicillatus-typeParatendipes albimanus-typeParatendipes nudisquama-typePhaenopsectraPolypedilum nubeculosum-typePolypedilum sordens-typePolypedilumProcladiusPsectrocladius flavus-typePsectrocladius calcaratus-typePsectrocladius sordidellus-typePseudochironomusPseudosmittiaPseudorthocladiusSmittiaStempellinaNeostempellinaStempellinella/ZavreliaStenochironomusStictochironomus rosenschoeldi-typeSynorthocladiusTanytarsus chinyensis-typeMicropsectra insignilobus-typeTanytarsus glabrescens-typeTanytarsus lugens-typeTanytarsus mendax-typeTanytarsus pallidicornis-typeCladotanytarsus-type AThienemannimyiaTribelosXenochironomusZalutschia-type BZalutschia zalutschicolaGuttipelopiaNilothaumaChironomini indeterminataOrthocladiinae indeterminataTanypodinae indeterminataTanytarsini indeterminataChironomidae indeterminataCeratopogonidaeChaoborusGravity corerCounting, microscope2009-06-19T12:00:00/2009-09-11T12:00:00Dataset10.1007/s10750-011-0601-z10.1007/s10933-012-9638-x11585 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalThis dataset provides the percentage-abundances of chironomid taxa identified in a set of surface sediment samples taken in the Plymouth area (Massachusetts, United States) in 2009. For each sample, a short sediment core was retrieved from a rubber dinghy using a gravity corer (both the Glew and the mini-Glew models were used) during field work in June and September 2009. Volumetric samples taken from the 0-1cm sediment depth sample were subsequently processed in the laboratory (University of New Brunswick, Canada) using standard protocols. The procedure involved placing the sample aliquot in a glass beaker and submerging it in warm 10% KOH for ca. 20 mins. Subsequently the material was rinsed over a 100µm mesh and individual head capsules were hand-sorted from the residue and mounted on microscope slides. Chironomid head capsules were identified using Brooks et al. 2007 and encountered taxa that were not present in that handbook are illustrated and described in Engels & Cwynar (2011).
This dataset provides chironomid abundances (expressed as percentage of the total chironomid sum) as well as measurements of water depth for each of the samples; Engels & Cwynar (2011) provide additional environmental observations for each of the 8 lakes sampled. A total of 132 surface sediment samples were originally counted, but as 3 samples only reached total chironomid count sums of less-than-50 these were removed from the original dataset, resulting in a final dataset consisting of 129 samples. The chironomid data provides information on within-lake distribution patterns of chironomid taxa for each of the 8 lakes sampled. The dataset was used to determine depth-preferences of each of the taxa encountered, and to determine common threshold depths (i.e. those water depths where abrupt changes in the composition of the chironomid fauna take place). These data were subsequently used to produce site-specific (i.e. one lake) and regional (i.e. 7- or 8-lake) chironomid-water depth inference models.Surface samples obtained from 8 lakes, with different number of samples taken from each lake: Bloody Pond – 19 samples; Crooked Pond – 26 samples; Deep Pond -5 samples; Dicks Pond – 6 samples; Little West Pond – 9 samples; Long Pond – 25 samples; Micajah Pond – 25 samples; UP: Union Pond – 14 samples. Ceratopogonidea head capsules and Chaeborus mandibles are included in line with other publications from the Nearctic region.
Stenochironomus type "Mt" was counted as a separate taxon by Engels & Cwynar 2011; it is easily distinguished from the typical Stenochironomus morphotype as it only has 1 single median tooth. Later it was found that this taxon actually represents 1-instar Stenochironomus larval head capsules. In future studies, it should be amalgamated with Stenochironomus.-70.707927-70.58071941.56361341.922692National Science Foundationhttps://doi.org/10.13039/100000001DEB-0816731Collaborative Research: Ecosystem Responses to Progressive and Rapid Climate Change During the Holocene in New EnglandNational Science Foundationhttps://doi.org/10.13039/100000001EAR-0602408Collaborative Research: Sub-Millennial Hydroclimatic Variability in the Northeastern United States during the HoloceneNational Science Foundationhttps://doi.org/10.13039/100000001EAR-1036191Collaborative Research: Sub-Millennial Hydroclimatic Variability in the Northeastern United States during the HolocenePorticushttps://doi.org/10.13039/100007350NielsStensenFellow2008Niels Stensen Fellowship 2008