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 nigricans has left across the world's sequence archives.
At a glance
DNA specimens8
Marker genes5
GenBank sequences7
eDNA detections6
Countries2
The DNA barcodea real sequence read deposited for this species
★ 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★rbcL2★rbcLa★ITS5★ITS2
plant barcodefungal barcode
06Genome at a glanceGoaT
The complete instruction manualCarex nigricans carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
Ploidypolyploid inferred
Ploidy records — measured levels and diploid/polyploid inferences · click for sources
polyploid1×GIFT · GIFT (floras)
GIFT · GIFT (floras)
08Occurrence & distribution
Record type1 268 records
Wild obs. + sensor165
Museum / vouchered1 103
Range
Area of Occupancy AOO3 532 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 accuracy97% within 1 km
≤100 m 113≤1 km 13≤10 km 1>10 km 3
130 georeferenced · 35 without coordinates
Open the mapobservation + sensor165
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 accuracy60% within 1 km
≤100 m 57≤1 km 291≤10 km 204>10 km 26
578 georeferenced · 525 without coordinates
Open the institutions mapphysical evidence1 103
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 institutions40 of 59 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
WTUlocation not on record
131
Vancouver, CA
100
Corvallis, US
97
Missoula, US
78
Victoria, CA
73
Moscow, US
67
DOI/NPS, Colonial National Historical Parklocation not on record
66
Bronx, US
56
University of Alberta Museumslocation not on record
52
Chicago, US
39
DOI/NPS, Mount Rainier National Parklocation not on record
32
Madison, US
29
Provo, US
17
Ann Arbor, US
16
Anchorage, US
14
Bozeman, US
13
CASlocation not on record
13
Arcata, US
13
Davis, US
12
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
11
Claremont, US
11
Caldwell, US
10
Tacoma, US
9
Montréal, CA
8
Saint Louis, US
8
Denver, US
8
University of Toronto Mississaugalocation not on record
6
University of Stellenboschlocation not on record
6
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
6
Bend, US
6
Angwin, US
6
Fredericton Stock Culture Collectionlocation not on record
5
Logan, US
5
Boise, US
4
Museum of the Rockieslocation not on record
4
Whitehorse, CA
4
Bloomington, US
3
Moscow State Universitylocation not on record
3
Pocatello, US
3
Flagstaff, US
2
Riverside, US
2
Paris, FR
2
Rocky Mountain Biological Laboratorylocation not on record
2
Wellington, NZ
2
Kew, GB
1
Royal Alberta Museumlocation not on record
1
San Jose, US
1
Northridge, US
1
Auckland, NZ
1
Research Collection of B. A. Bennettlocation not on record
1
Wuzhou, CN
1
Cheney, US
1
University of Alaska Museumlocation not on record
1
Montréal, CA
1
Hokkaido University Botanic Gardenlocation not on record
1
Pacific Lutheran Universitylocation not on record
1
Albuquerque, US
1
Oskarshamn, SE
1
STUlocation not on record
1
59 institutions · 1 069 of 1 103 vouchered records shown · 33 without an institution code
09Environmental DNA6 detections
Where the DNA of Carex nigricans 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 found6
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 6 detections have coordinates
Open the map2 countries0
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 median4.90 °C -2.50–7.90
Seasonal swing summer↔winter21.8 °C
Max temp (day)7.20 °C 0.5–10.4
Min temp (night)2.20 °C -4.70–5.00
Precipitation129 mm/mo 69.1–288
Air humidity65.1 % 63.3–69.2
Moisture balance0.9 mm/mo -1.30–172
Vapour deficit269 Pa 260–387
Wind speed4.50 m/s 3.90–5.40
Cloud cover49.4 % 43.4–55.9
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.
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility1 268 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI6 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics8 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
giftgenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗