A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Carex nebrascensis has left across the world's sequence archives.
At a glance
DNA specimens7
Marker genes4
eDNA detections5
Countries1
Marker genes sequenced
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK★rbcL★rbcLa★trnL-F
plant barcode
07Deep time~0 Ma lineage
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin0 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type2 653 records
Wild obs. + sensor229
Museum / vouchered2 424
Origin
Native5
Range
Area of Occupancy AOO7 216 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy90% within 1 km
≤100 m 137≤1 km 22≤10 km 4>10 km 13
176 georeferenced · 53 without coordinates
Open the mapobservation + sensor229
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy67% within 1 km
≤100 m 220≤1 km 646≤10 km 373>10 km 62
1 301 georeferenced · 1 123 without coordinates
Open the institutions mapphysical evidence2 424
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions68 of 101 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
142
Denver, US
130
Flagstaff, US
110
Claremont, US
106
DOI/NPS, Colonial National Historical Parklocation not on record
105
WTUlocation not on record
105
Wuzhou, CN
96
Musee des Dinosaures d'Esperaza (Aude)location not on record
84
Corvallis, US
83
Moscow, US
81
Missoula, US
71
Caldwell, US
70
Chicago, US
67
Logan, US
64
Lincoln, US
61
Albuquerque, US
59
Chadron, US
58
Boise, US
57
Davis, US
56
CASlocation not on record
51
Pullman, US
50
Riverside, US
50
Pocatello, US
47
Provo, US
40
Madison, US
37
Arcata, US
27
University of Alberta Museumslocation not on record
26
Bronx, US
26
Phoenix, US
25
San Angelo, US
18
ASUlocation not on record
17
Ann Arbor, US
17
Bozeman, US
15
Angwin, US
14
Chongqing Museumlocation not on record
14
DOI/NPS, Greenbelt Parklocation not on record
14
VALElocation not on record
14
Orem, US
13
Santa Barbara, US
12
San Diego, US
12
Pittsburg, US
11
Bend, US
11
Canadian Department of Agriculturelocation not on record
10
Bandelier National Monumentlocation not on record
9
Spearfish, US
9
Saint Louis, US
9
Henderson, US
9
USFS/BHSClocation not on record
8
University of Stellenboschlocation not on record
8
Weber State Universitylocation not on record
6
Eastern Nevada Landscape Coalitionlocation not on record
6
Museum of the Rockieslocation not on record
5
Chapel Hill, US
4
Northridge, US
4
San Luis Obispo, US
4
Rocky Mountain Biological Laboratorylocation not on record
4
Montréal, CA
3
Ashland, US
3
Dover, US
3
Tuscaloosa, US
3
US
3
STNFlocation not on record
3
Johnson City, US
2
Cheney, US
2
Truckee, US
2
Durango, US
2
Severin-McDaniel Insect Collectionlocation not on record
2
Beijing, CN
2
San Jose State University, Museum of Birds and Mammalslocation not on record
2
Delaware State University, Claude E. Phillips Herbariumlocation not on record
2
US
2
Grand Junction, US
1
Pomona Collegelocation not on record
1
Wellington, NZ
1
Whitewater, US
1
KNFSClocation not on record
1
Bureau of Land Management, Caliente Field Officelocation not on record
1
Dekalb, US
1
Bloomington, US
1
Wlocation not on record
1
Long Beach, US
1
San Jose, US
1
SEFlocation not on record
1
Brookings, US
1
St. Paul, US
1
EL PASO, US
1
Portland, US
1
GZUlocation not on record
1
Empresa Pernambucana de Pesquisa Agropecuária, IPAlocation not on record
1
Fort Worth, US
1
Tacoma, US
1
Santa Cruz, US
1
Fredericton Stock Culture Collectionlocation not on record
1
Los Angeles, US
1
KNFHClocation not on record
1
Irvine, US
1
Tempe, US
1
INFlocation not on record
1
Yellowstone National Park Herbariumlocation not on record
1
Vancouver, CA
1
Philadelphia, US
1
101 institutions · 2 327 of 2 424 vouchered records shown · 97 without an institution code
09Environmental DNA5 detections
Where the DNA of Carex nebrascensis was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found5
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map1 country0
Aspen grove with camas spp., conifer spp., r…
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median15.8 °C 14.8–19.3
Seasonal swing summer↔winter24.1 °C
Max temp (day)23.2 °C 22.4–26.8
Min temp (night)8.50 °C 7.10–11.0
Precipitation61.8 mm/mo 15.9–71.8
Air humidity50.4 % 43.0–51.5
Moisture balance-95.1 mm/mo -163–-76.5
Vapour deficit866 Pa 837–1,289
Wind speed2.10 m/s 1.70–2.60
Cloud cover19.9 % 19.9–22.6
CHELSA 1981–2010, ~9 km grid, at location & month of 3 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
WikipediaWikimedia Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility2 653 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI5 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics7 specimens↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
WikidataWikimedia Foundationstructured facts↗