Great Ordovician Biodiversification Event
E87794
The Great Ordovician Biodiversification Event was a profound evolutionary radiation during the Ordovician Period that saw a dramatic increase in marine biodiversity and the establishment of many major animal groups in Paleozoic oceans.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Great Ordovician Biodiversification Event canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T738730 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Great Ordovician Biodiversification Event Context triple: [Paleozoic Era, majorEvent, Great Ordovician Biodiversification Event]
-
A.
Cambrian explosion
The Cambrian explosion was a relatively brief period around 541 million years ago when most major animal groups rapidly appeared in the fossil record, dramatically increasing the complexity and diversity of life on Earth.
-
B.
Ediacaran biota
The Ediacaran biota comprises some of the earliest known complex multicellular organisms, featuring soft-bodied, enigmatic life forms that lived in the oceans before the Cambrian explosion.
-
C.
On the Imperfection of the Geological Record
"On the Imperfection of the Geological Record" is a chapter in Charles Darwin's *On the Origin of Species* that addresses why the fossil record is incomplete and how this affects evidence for evolutionary change.
-
D.
Eocene–Oligocene climate transition
The Eocene–Oligocene climate transition was a major global cooling event around 34 million years ago that marked the shift from a greenhouse to an icehouse Earth, including the formation of large Antarctic ice sheets.
-
E.
Permian–Triassic mass extinction
The Permian–Triassic mass extinction was the most severe biodiversity crisis in Earth's history, wiping out the majority of marine and terrestrial species around 252 million years ago and marking the boundary between the Paleozoic and Mesozoic eras.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Great Ordovician Biodiversification Event Target entity description: The Great Ordovician Biodiversification Event was a profound evolutionary radiation during the Ordovician Period that saw a dramatic increase in marine biodiversity and the establishment of many major animal groups in Paleozoic oceans.
-
A.
Cambrian explosion
The Cambrian explosion was a relatively brief period around 541 million years ago when most major animal groups rapidly appeared in the fossil record, dramatically increasing the complexity and diversity of life on Earth.
-
B.
Ediacaran biota
The Ediacaran biota comprises some of the earliest known complex multicellular organisms, featuring soft-bodied, enigmatic life forms that lived in the oceans before the Cambrian explosion.
-
C.
On the Imperfection of the Geological Record
"On the Imperfection of the Geological Record" is a chapter in Charles Darwin's *On the Origin of Species* that addresses why the fossil record is incomplete and how this affects evidence for evolutionary change.
-
D.
Eocene–Oligocene climate transition
The Eocene–Oligocene climate transition was a major global cooling event around 34 million years ago that marked the shift from a greenhouse to an icehouse Earth, including the formation of large Antarctic ice sheets.
-
E.
Permian–Triassic mass extinction
The Permian–Triassic mass extinction was the most severe biodiversity crisis in Earth's history, wiping out the majority of marine and terrestrial species around 252 million years ago and marking the boundary between the Paleozoic and Mesozoic eras.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
Ordovician event
ⓘ
biodiversification event ⓘ evolutionary radiation ⓘ paleontological event ⓘ |
| affects |
brachiopods
ⓘ
bryozoans ⓘ conodonts ⓘ corals ⓘ echinoderms ⓘ graptolites ⓘ mollusks ⓘ ostracods ⓘ trilobites ⓘ |
| alsoKnownAs | GOBE ⓘ |
| associatedWith |
development of complex food webs
ⓘ
expansion of carbonate platforms ⓘ increase in alpha diversity ⓘ increase in beta diversity ⓘ increase in gamma diversity ⓘ increase in plankton diversity ⓘ |
| characterizedBy |
dramatic increase in marine biodiversity
ⓘ
expansion of ecological niches ⓘ increase in bioturbation ⓘ increase in ecological complexity ⓘ increase in predation pressure ⓘ increase in reef-building activity ⓘ increase in taxonomic richness ⓘ increase in tiering within seafloor communities ⓘ |
| endApproximateMa | 444 ⓘ |
| follows | Cambrian explosion ⓘ |
| hasDomain |
benthic communities
ⓘ
marine ecosystems ⓘ planktonic communities ⓘ |
| hasSignificance |
important benchmark for Phanerozoic biodiversity patterns
ⓘ
key event in the history of marine life ⓘ major step in the establishment of the Paleozoic marine fauna ⓘ |
| occursIn | Paleozoic Era ⓘ |
| partOf | Ordovician Period ⓘ |
| peakApproximateMa | 470 ⓘ |
| possibleDriver |
changes in ocean chemistry
ⓘ
climatic cooling from greenhouse to icehouse conditions ⓘ increased nutrient input to oceans ⓘ plate tectonics and continental reconfiguration ⓘ sea-level rise and expansion of shallow seas ⓘ |
| precedes | Late Ordovician mass extinction ⓘ |
| resultsIn |
differentiation of marine faunal provinces
ⓘ
establishment of many major animal groups in Paleozoic oceans ⓘ long-term rise in marine diversity above Cambrian levels ⓘ |
| startApproximateMa | 485 ⓘ |
| studiedIn |
paleobiology
ⓘ
paleoecology ⓘ stratigraphy ⓘ |
| temporalLocation |
Early Ordovician
ⓘ
linked to:
Middle Ordovician
Late Ordovician ⓘ Middle Ordovician ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Great Ordovician Biodiversification Event Description of subject: The Great Ordovician Biodiversification Event was a profound evolutionary radiation during the Ordovician Period that saw a dramatic increase in marine biodiversity and the establishment of many major animal groups in Paleozoic oceans.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.