{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:QRVCI5ZFRZHMO3PGT3KGQ65NO7","short_pith_number":"pith:QRVCI5ZF","canonical_record":{"source":{"id":"1212.5025","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2012-12-20T13:14:53Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"ec22407117f456801177c90e4a9883206e99b467254b50f0df03570869d2d360","abstract_canon_sha256":"94c71b0df0955650a464ef45d68b4c0995c5f3c2514d6567d49002e166a07fed"},"schema_version":"1.0"},"canonical_sha256":"846a2477258e4ec76de69ed4687bad77cfcaa4784a7557e22de986fb0e9d7255","source":{"kind":"arxiv","id":"1212.5025","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.5025","created_at":"2026-05-18T03:38:04Z"},{"alias_kind":"arxiv_version","alias_value":"1212.5025v1","created_at":"2026-05-18T03:38:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.5025","created_at":"2026-05-18T03:38:04Z"},{"alias_kind":"pith_short_12","alias_value":"QRVCI5ZFRZHM","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QRVCI5ZFRZHMO3PG","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QRVCI5ZF","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:QRVCI5ZFRZHMO3PGT3KGQ65NO7","target":"record","payload":{"canonical_record":{"source":{"id":"1212.5025","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2012-12-20T13:14:53Z","cross_cats_sorted":["physics.bio-ph"],"title_canon_sha256":"ec22407117f456801177c90e4a9883206e99b467254b50f0df03570869d2d360","abstract_canon_sha256":"94c71b0df0955650a464ef45d68b4c0995c5f3c2514d6567d49002e166a07fed"},"schema_version":"1.0"},"canonical_sha256":"846a2477258e4ec76de69ed4687bad77cfcaa4784a7557e22de986fb0e9d7255","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:38:04.091651Z","signature_b64":"rOZOB66uDJnY3pMfGRQpwNULEWpBzTTrUf2vWxZeMjaXT6P7tXlq7VrXq94ohtG7fdHjqAwGYLTsOPhhpmaACw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"846a2477258e4ec76de69ed4687bad77cfcaa4784a7557e22de986fb0e9d7255","last_reissued_at":"2026-05-18T03:38:04.090958Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:38:04.090958Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1212.5025","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":"2026-05-18T03:38:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"esS2+sg5Y47/ZI1kZQmfgjCD4sIRfDY4O0fUUJQIzYrGAQ/LWWJAmViGYDzfp8c53TeGxctxWH9VPSZHPCYOBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:38:25.957493Z"},"content_sha256":"e6bf96c1c84b6d60f7299c70fb7759964463de2b1350ece82aa0fc651832355e","schema_version":"1.0","event_id":"sha256:e6bf96c1c84b6d60f7299c70fb7759964463de2b1350ece82aa0fc651832355e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:QRVCI5ZFRZHMO3PGT3KGQ65NO7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Persistence of complex food webs in metacommunities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.bio-ph"],"primary_cat":"q-bio.PE","authors_text":"Gesa A. B\\\"ohme, Thilo gross","submitted_at":"2012-12-20T13:14:53Z","abstract_excerpt":"Metacommunity theory is considered a promising approach for explaining species diversity and food web complexity. Recently Pillai et al. proposed a simple modeling framework for the dynamics of food webs at the metacommunity level. Here, we employ this framework to compute general conditions for the persistence of complex food webs in metacommunities. The persistence conditions found depend on the connectivity of the resource patches and the structure of the assembled food web, thus linking the underlying spatial patch-network and the species interaction network. We find that the persistence o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.5025","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":"2026-05-18T03:38:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bI5VKcawqINjktqv6UoPgmYxhBvId/BS5lVl4/2GR+n3tvykqJCEy8+l/soUscPa81A1BSTFoJ33dnaE1UO6Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:38:25.957845Z"},"content_sha256":"2324afa97eae3075391c424a2e765d08f1c2c5752823ecaf3b025a8ff589acd4","schema_version":"1.0","event_id":"sha256:2324afa97eae3075391c424a2e765d08f1c2c5752823ecaf3b025a8ff589acd4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7/bundle.json","state_url":"https://pith.science/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7/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":"2026-06-02T08:38:25Z","links":{"resolver":"https://pith.science/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7","bundle":"https://pith.science/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7/bundle.json","state":"https://pith.science/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QRVCI5ZFRZHMO3PGT3KGQ65NO7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:QRVCI5ZFRZHMO3PGT3KGQ65NO7","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":"94c71b0df0955650a464ef45d68b4c0995c5f3c2514d6567d49002e166a07fed","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2012-12-20T13:14:53Z","title_canon_sha256":"ec22407117f456801177c90e4a9883206e99b467254b50f0df03570869d2d360"},"schema_version":"1.0","source":{"id":"1212.5025","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.5025","created_at":"2026-05-18T03:38:04Z"},{"alias_kind":"arxiv_version","alias_value":"1212.5025v1","created_at":"2026-05-18T03:38:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.5025","created_at":"2026-05-18T03:38:04Z"},{"alias_kind":"pith_short_12","alias_value":"QRVCI5ZFRZHM","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"QRVCI5ZFRZHMO3PG","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"QRVCI5ZF","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:2324afa97eae3075391c424a2e765d08f1c2c5752823ecaf3b025a8ff589acd4","target":"graph","created_at":"2026-05-18T03:38:04Z","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":"Metacommunity theory is considered a promising approach for explaining species diversity and food web complexity. Recently Pillai et al. proposed a simple modeling framework for the dynamics of food webs at the metacommunity level. Here, we employ this framework to compute general conditions for the persistence of complex food webs in metacommunities. The persistence conditions found depend on the connectivity of the resource patches and the structure of the assembled food web, thus linking the underlying spatial patch-network and the species interaction network. We find that the persistence o","authors_text":"Gesa A. B\\\"ohme, Thilo gross","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2012-12-20T13:14:53Z","title":"Persistence of complex food webs in metacommunities"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.5025","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:e6bf96c1c84b6d60f7299c70fb7759964463de2b1350ece82aa0fc651832355e","target":"record","created_at":"2026-05-18T03:38:04Z","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":"94c71b0df0955650a464ef45d68b4c0995c5f3c2514d6567d49002e166a07fed","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.PE","submitted_at":"2012-12-20T13:14:53Z","title_canon_sha256":"ec22407117f456801177c90e4a9883206e99b467254b50f0df03570869d2d360"},"schema_version":"1.0","source":{"id":"1212.5025","kind":"arxiv","version":1}},"canonical_sha256":"846a2477258e4ec76de69ed4687bad77cfcaa4784a7557e22de986fb0e9d7255","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"846a2477258e4ec76de69ed4687bad77cfcaa4784a7557e22de986fb0e9d7255","first_computed_at":"2026-05-18T03:38:04.090958Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:38:04.090958Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rOZOB66uDJnY3pMfGRQpwNULEWpBzTTrUf2vWxZeMjaXT6P7tXlq7VrXq94ohtG7fdHjqAwGYLTsOPhhpmaACw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:38:04.091651Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.5025","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e6bf96c1c84b6d60f7299c70fb7759964463de2b1350ece82aa0fc651832355e","sha256:2324afa97eae3075391c424a2e765d08f1c2c5752823ecaf3b025a8ff589acd4"],"state_sha256":"d2ccecd2a0b1e82bfde28838bc3fad2adc65a66a3c8e1d3ef62ddad8f0ea69ed"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rKj1URMuAKxwwib4zF/KsBAgj4+xv66hv6iugHtKFoj2AznOygxo1mkQE9hksNxeSBSQxXzoLMm+1kZcUWB0Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T08:38:25.959799Z","bundle_sha256":"caae04657a5e2e66bb0d608da0cc4a29175d04208a503388d84f658bddd42bc6"}}