{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:YX7BU2QOPHFBWVITEFN75INA34","short_pith_number":"pith:YX7BU2QO","canonical_record":{"source":{"id":"1703.00732","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.PS","submitted_at":"2017-03-02T11:46:00Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"2e5de2a8b2f579831d9cbe02cab60a4f24d657644ed025a6c89d163b3238e0b7","abstract_canon_sha256":"86e86ba9673c154809a5b647aa3a66ee2710fa5a94763ab5e1a21dbd100b01b6"},"schema_version":"1.0"},"canonical_sha256":"c5fe1a6a0e79ca1b5513215bfea1a0df3090a953b017c14dda3b70b278742cac","source":{"kind":"arxiv","id":"1703.00732","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00732","created_at":"2026-05-18T00:49:40Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00732v1","created_at":"2026-05-18T00:49:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00732","created_at":"2026-05-18T00:49:40Z"},{"alias_kind":"pith_short_12","alias_value":"YX7BU2QOPHFB","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YX7BU2QOPHFBWVIT","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YX7BU2QO","created_at":"2026-05-18T12:31:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:YX7BU2QOPHFBWVITEFN75INA34","target":"record","payload":{"canonical_record":{"source":{"id":"1703.00732","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.PS","submitted_at":"2017-03-02T11:46:00Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"2e5de2a8b2f579831d9cbe02cab60a4f24d657644ed025a6c89d163b3238e0b7","abstract_canon_sha256":"86e86ba9673c154809a5b647aa3a66ee2710fa5a94763ab5e1a21dbd100b01b6"},"schema_version":"1.0"},"canonical_sha256":"c5fe1a6a0e79ca1b5513215bfea1a0df3090a953b017c14dda3b70b278742cac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:40.924258Z","signature_b64":"xVSCjFs7lQimOeiYe38kPwKCeaub70kMkx7LKowsz7HatBC0FsjcvkeXp2VWQKqXEwYc039AgWKuHA9BCmM8AQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c5fe1a6a0e79ca1b5513215bfea1a0df3090a953b017c14dda3b70b278742cac","last_reissued_at":"2026-05-18T00:49:40.923760Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:40.923760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.00732","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:49:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"5w2HooVvNwXbdVPFduzfYAR8i9vOVf/KH3WLLjeWBAi5IXboSaxFIjZaG3ZNMz8euS7/hsjaXAjETKRo9uz6Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:35:57.035835Z"},"content_sha256":"53dff00e7d681acbbadd5936d90190310979639207beab4b63cde3f4de9b44ca","schema_version":"1.0","event_id":"sha256:53dff00e7d681acbbadd5936d90190310979639207beab4b63cde3f4de9b44ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:YX7BU2QOPHFBWVITEFN75INA34","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gradual Regime Shifts in Fairy Circles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph"],"primary_cat":"nlin.PS","authors_text":"Ehud Meron, Golan Bel, Yuval R. Zelnik","submitted_at":"2017-03-02T11:46:00Z","abstract_excerpt":"Large responses of ecosystems to small changes in the conditions--regime shifts--are of great interest and importance. In spatially extended ecosystems, these shifts may be local or global. Using empirical data and mathematical modeling, we investigated the dynamics of the Namibian fairy circle ecosystem as a case study of regime shifts in a pattern-forming ecosystem. Our results provide new support, based on the dynamics of the ecosystem, for the view of fairy circles as a self-organization phenomenon driven by water-vegetation interactions. The study further suggests that fairy circle birth "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00732","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:49:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6epQ3aRS8xHHLZs2xFW9dX5IQ1UXWQmgzytCZwkUSmfJ3Xy/p6mvMTyYSXIW0sweeT3zIZCW6HaTkZqofQNjDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T08:35:57.036185Z"},"content_sha256":"b3e35e09355d5fb593adc4da0c7d52cce19cfdf7457b5d6611a3e9593eb15d6b","schema_version":"1.0","event_id":"sha256:b3e35e09355d5fb593adc4da0c7d52cce19cfdf7457b5d6611a3e9593eb15d6b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YX7BU2QOPHFBWVITEFN75INA34/bundle.json","state_url":"https://pith.science/pith/YX7BU2QOPHFBWVITEFN75INA34/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YX7BU2QOPHFBWVITEFN75INA34/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-30T08:35:57Z","links":{"resolver":"https://pith.science/pith/YX7BU2QOPHFBWVITEFN75INA34","bundle":"https://pith.science/pith/YX7BU2QOPHFBWVITEFN75INA34/bundle.json","state":"https://pith.science/pith/YX7BU2QOPHFBWVITEFN75INA34/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YX7BU2QOPHFBWVITEFN75INA34/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:YX7BU2QOPHFBWVITEFN75INA34","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"86e86ba9673c154809a5b647aa3a66ee2710fa5a94763ab5e1a21dbd100b01b6","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.PS","submitted_at":"2017-03-02T11:46:00Z","title_canon_sha256":"2e5de2a8b2f579831d9cbe02cab60a4f24d657644ed025a6c89d163b3238e0b7"},"schema_version":"1.0","source":{"id":"1703.00732","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00732","created_at":"2026-05-18T00:49:40Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00732v1","created_at":"2026-05-18T00:49:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00732","created_at":"2026-05-18T00:49:40Z"},{"alias_kind":"pith_short_12","alias_value":"YX7BU2QOPHFB","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"YX7BU2QOPHFBWVIT","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"YX7BU2QO","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:b3e35e09355d5fb593adc4da0c7d52cce19cfdf7457b5d6611a3e9593eb15d6b","target":"graph","created_at":"2026-05-18T00:49:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Large responses of ecosystems to small changes in the conditions--regime shifts--are of great interest and importance. In spatially extended ecosystems, these shifts may be local or global. Using empirical data and mathematical modeling, we investigated the dynamics of the Namibian fairy circle ecosystem as a case study of regime shifts in a pattern-forming ecosystem. Our results provide new support, based on the dynamics of the ecosystem, for the view of fairy circles as a self-organization phenomenon driven by water-vegetation interactions. The study further suggests that fairy circle birth ","authors_text":"Ehud Meron, Golan Bel, Yuval R. Zelnik","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.PS","submitted_at":"2017-03-02T11:46:00Z","title":"Gradual Regime Shifts in Fairy Circles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00732","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:53dff00e7d681acbbadd5936d90190310979639207beab4b63cde3f4de9b44ca","target":"record","created_at":"2026-05-18T00:49:40Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"86e86ba9673c154809a5b647aa3a66ee2710fa5a94763ab5e1a21dbd100b01b6","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"nlin.PS","submitted_at":"2017-03-02T11:46:00Z","title_canon_sha256":"2e5de2a8b2f579831d9cbe02cab60a4f24d657644ed025a6c89d163b3238e0b7"},"schema_version":"1.0","source":{"id":"1703.00732","kind":"arxiv","version":1}},"canonical_sha256":"c5fe1a6a0e79ca1b5513215bfea1a0df3090a953b017c14dda3b70b278742cac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c5fe1a6a0e79ca1b5513215bfea1a0df3090a953b017c14dda3b70b278742cac","first_computed_at":"2026-05-18T00:49:40.923760Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:49:40.923760Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xVSCjFs7lQimOeiYe38kPwKCeaub70kMkx7LKowsz7HatBC0FsjcvkeXp2VWQKqXEwYc039AgWKuHA9BCmM8AQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:49:40.924258Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.00732","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:53dff00e7d681acbbadd5936d90190310979639207beab4b63cde3f4de9b44ca","sha256:b3e35e09355d5fb593adc4da0c7d52cce19cfdf7457b5d6611a3e9593eb15d6b"],"state_sha256":"32b8ab70ee6c8313457ec740a4ab3ccb02429a677f9c383bf790d9047d068d53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NN51gP4tlzS/bwZ34OpEs1joywZm2tXfmXHpb+WV6uNdvmqbwCZ8LkLtU64zMLUCNHpKCxc/em4elInt6QGLDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T08:35:57.038227Z","bundle_sha256":"cd0adfb2c44c3b0eb4e6be3f17b63ffc73e8e67ccd909e83221c8c9648c3b5f6"}}