Nordic Chronology Playback

These twenty-five governed animations replay dated evidence from the oldest window toward the present. Denmark, Finland, Norway, and Sweden remain available as the same four filter scopes used by the interactive Nordic atlas; a country with no evidence for a selected taxon remains empty and is not presented as covered.

The seventeen Neotoma animations show discrete dated source observations. Changing spatial visibility through time can look flow-like, but it is not evidence of movement, migration, causation, or propagation. The eight PANGAEA animations show non-interpolated modeled taxon, land-cover, and plant-functional-type context from PANGAEA 937075, published with the Githumbi et al. (2022) reconstruction; a modeled surface is not an observed pollen trajectory. Null ages remain unavailable and are never converted to zero.

Each rendered frame keeps the map stage clear of search, navigation, and interactive control panels. A separate evidence key identifies the selected series, BP window, visible and total counts, scientific posture, and color meaning. The animations use the atlas's tile-free background so borders, labels, and provider failures cannot obscure or compete with the evidence.

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What Each Animation Represents

Animation	Governed population	Temporal presentation
all Neotoma pollen samples	9,988 nodes / 215,903 observations	230 contiguous windows; 100 years except the terminal window
TRSH — trees and shrubs	9,978 nodes / 114,225 observations	230 contiguous windows; 100 years except the terminal window
UPHE — upland herbs	9,928 nodes / 91,739 observations	230 contiguous windows; 100 years except the terminal window
AQVP — aquatic vascular plants	4,991 nodes / 9,666 observations	192 contiguous windows; 100 years except the terminal window
Avena source-label preset	110 nodes / 110 observations	140 contiguous windows; 13,907–6.3 BP
Hordeum source-label preset	572 nodes / 572 observations	124 contiguous windows; 12,318–2.780076 BP
Triticum source-label preset	375 nodes / 375 observations	107 contiguous windows; 10,646–2.780076 BP
Secale source-label preset	707 nodes / 707 observations	45 contiguous windows; 4,461–0 BP
Cerealia source-label preset	676 nodes / 676 observations	119 contiguous windows; 11,891–0 BP
exact taxon: Avena	7 nodes / 7 observations	18 contiguous windows; 1,725–6.3 BP; source taxon 3915 only
exact taxon: Hordeum	87 nodes / 87 observations	67 contiguous windows; 6,645–11 BP; source taxon 3923 only
exact taxon: Triticum	153 nodes / 153 observations	72 contiguous windows; 7,197.5–11 BP; source taxon 969 only
exact taxon: Secale	469 nodes / 469 observations	45 contiguous windows; 100 years except the terminal window; source taxon 967 only
exact taxon: Poaceae (Cerealia)	28 nodes / 28 observations	24 contiguous windows; 2,337–0 BP; source taxon 416 only
exact taxon: Avena/Triticum	34 nodes / 34 observations	92 contiguous windows; 9,138–24 BP; source taxon 415 only
exact taxon: Hordeum/Secale	2 nodes / 2 observations	14 contiguous windows; 1,751–376 BP; source taxon 3924 only
exact taxon: Secale cereale	191 nodes / 191 observations	31 contiguous windows; 3,067–0 BP; source taxon 3926 only
modeled cereal type (Cerealia.t)	75 modeled cells per frame	25 source-defined windows; no interpolation
modeled Secale cereale	75 modeled cells per frame	25 source-defined windows; no interpolation
open land (OL)	75 modeled cells per frame	25 source-defined windows; no interpolation
evergreen trees (ET)	75 modeled cells per frame	25 source-defined windows; no interpolation
summer-green trees (ST)	75 modeled cells per frame	25 source-defined windows; no interpolation
low shrub, broadleaved evergreen (LSE)	75 modeled cells per frame	25 source-defined windows; no interpolation
grassland — all herbs (GL)	75 modeled cells per frame	25 source-defined windows; no interpolation
agricultural land — cereals (AL)	75 modeled cells per frame	25 source-defined windows; no interpolation

Counts retain their declared denominator. Nodes and observations are not added together, and the modeled-cell denominator is not compared as though it were a pollen-observation count. Each Neotoma taxon label remains bound to its distinct source taxon ID; similar cereal labels are not merged or silently resolved to a species.

Country Availability for Source-Label Presets

Source-label preset	Denmark	Finland	Norway	Sweden
Avena	6	6	40	58
Hordeum	23	20	88	441
Triticum	6	9	60	300
Secale	15	79	49	564
Cerealia	0	117	45	514

These are literal source-label memberships rather than accepted taxonomic classifications. A source taxon may belong to more than one preset, so preset rows must not be added together as a unique-observation total.

Country Availability for Exact Taxa

Exact source taxon	Denmark	Finland	Norway	Sweden
Avena, 3915	0	0	1	6
Hordeum, 3923	0	19	7	61
Triticum, 969	0	3	2	148
Secale, 967	15	76	13	365
Poaceae (Cerealia), 416	0	2	0	26
Avena/Triticum, 415	6	0	28	0
Hordeum/Secale, 3924	0	0	0	2
Secale cereale, 3926	0	3	36	152

Values are source-observation counts, and each row reconciles to its governed population above. Zero means no admitted observation for that exact source taxon in that country; it does not mean absence in the past environment.

All Neotoma Pollen Samples

All admitted Neotoma sample-presence nodes, replayed from the oldest dated window toward the present.

TRSH — Trees and Shrubs

Source-native TRSH observations only. The sequence shows dated observation visibility, not inferred dispersal.

UPHE — Upland Herbs

Source-native UPHE observations only, with the same interval rules and four-country filter controls as the atlas.

AQVP — Aquatic Vascular Plants

Source-native AQVP observations only. Empty windows remain empty instead of being filled or interpolated.

Avena Source-Label Preset

All observations whose literal source labels belong to the governed Avena preset: 110 nodes and 110 observations. This is not an accepted taxonomic classification.

Hordeum Source-Label Preset

All observations whose literal source labels belong to the governed Hordeum preset: 572 nodes and 572 observations. Ambiguous labels remain visibly ambiguous.

Triticum Source-Label Preset

All observations whose literal source labels belong to the governed Triticum preset: 375 nodes and 375 observations. The sequence does not infer movement.

Secale Source-Label Preset

All observations whose literal source labels belong to the governed Secale preset: 707 nodes and 707 observations. Exact and ambiguous labels stay independently inspectable.

Cerealia Source-Label Preset

All observations whose literal source labels belong to the governed Cerealia preset: 676 nodes and 676 observations. This source-label view remains separate from modeled cereal context.

Exact Taxon — Avena

Only Neotoma source taxon 3915 (Avena): 7 nodes and 7 observations.

Exact Taxon — Hordeum

Only Neotoma source taxon 3923 (Hordeum): 87 nodes and 87 observations.

Exact Taxon — Triticum

Only Neotoma source taxon 969 (Triticum): 153 nodes and 153 observations.

Exact Taxon — Secale

Only Neotoma source taxon 967 (Secale): 469 nodes and 469 observations. Broader cereal categories are not silently merged into this exact-taxon view.

Exact Taxon — Poaceae (Cerealia)

Only Neotoma source taxon 416, Poaceae (Cerealia): 28 nodes and 28 observations.

Exact Taxon — Avena/Triticum

Only Neotoma source taxon 415 (Avena/Triticum): 34 nodes and 34 observations. It is not resolved to either genus.

Exact Taxon — Hordeum/Secale

Only Neotoma source taxon 3924 (Hordeum/Secale): 2 nodes and 2 observations. It is not merged into either genus.

Exact Taxon — Secale cereale

Only Neotoma source taxon 3926 (Secale cereale): 191 nodes and 191 observations. This observed source category remains separate from the modeled PANGAEA metric below.

PANGAEA Modeled Cereal Type — Cerealia.t

Cerealia.t modeled context from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows. This surface is distinct from exact source-taxon observations and is not an abundance or propagation claim.

PANGAEA Modeled Secale cereale

Secale cereale modeled context from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows. It is kept separate from Neotoma source taxon 967 and is not treated as an observed trajectory.

PANGAEA Open-Land Context

Open-land metric OL from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows from 11,700 BP toward the present.

PANGAEA Evergreen-Tree Context

Evergreen-tree land-cover metric ET from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows. It is context, not a source-observation or propagation layer.

PANGAEA Summer-Green-Tree Context

Summer-green-tree land-cover metric ST from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows. It is not silently combined with ET or source pollen observations.

PANGAEA Low-Shrub Context

Low shrub, broadleaved evergreen source PFT code LSE from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows.

PANGAEA Grassland Context

Grassland — all herbs source PFT code GL from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows.

PANGAEA Agricultural-Land Context

Agricultural land — cereals source PFT code AL from PANGAEA 937075: 75 modeled cells in each of 25 source-defined windows. It remains distinct from exact cereal-taxon evidence.

Scientific Boundary

Candidate succession remains refused with reason accepted_scientific_classifications_not_available. Accordingly, these media contain no arrows, inferred edges, interpolated heat flow, or causal migration claim. A future propagation product must first admit versioned scientific classifications, retain uncertainty, apply the same rules across borders, and publish sensitivity and refusal evidence alongside any candidate edges.

The interactive Nordic atlas supports exact ecological-code and taxon selection, Older and Newer navigation, playback, and direct inspection of the active denominator and visible count.