# Disturbance legacies and resilience simulation using an individual-based forest landscape model on the Andrews Experimental Forest ## Dataset - **Database Code:** TP125 - **Title:** Disturbance legacies and resilience simulation using an individual-based forest landscape model on the Andrews Experimental Forest - **Abstract:** Disturbances are key drivers of forest ecosystem dynamics, and forests are well adapted to their natural disturbance regimes. However, as a result of climate change, disturbance frequency is expected to increase in the future in many regions. It is not yet clear how such changes might affect forest ecosystems, and which mechanisms contribute to (current and future) disturbance resilience. We here studied the 6364-ha HJ Andrews Experimental Forest landscape to investigate how patches of remnant old-growth trees (as one important class of biological legacies) affect the resilience of forest ecosystems to disturbance. Using the spatially explicit, individual-based forest landscape model iLand we analyzed the effect of three different levels of remnant patches (0%, 12%, and 24% of the landscape) on 500-year recovery trajectories after a large, high severity wildfire. In addition, we evaluated how three different levels of fire frequency (no fire, a historic fire return interval of 262 years, and a reduced fire return interval of 131 years) modulate the effects of initial legacies. The study investigated effects of legacies on the resilience of forest ecosystem structure (represented by canopy complexity as described by the rumple index), composition (proportion of late-seral species), and functioning (total ecosystem carbon storage). For each scenario of initial legacy and fire return interval 25 replicates were simulated. More information on the simulation methodology as well as the code and executable used for this study can be obtained at http://iLand.boku.ac.at. The dataset is completed and no further analyses are planned at this point. The results are published in Ecological Applications http://dx.doi.org/10.1890/14-0255.1. - **Keywords:** stand structure; populations; ecology; forest dynamics; fires; community composition; plant species composition; land cover; processes; succession; carbon cycling; disturbance; modeling; landscape change; ecosystems; forests; trees; vegetation; resistance and resilience; ecosystem processes; landscape dynamics; populations; disturbance - **Temporal coverage:** 2014-05-01 to 2014-05-01 - **Principal Investigator:** Rupert Seidl ## Data Entities 1. TP12501 ## Entity 1: TP12501 ### Attribute list - **DBCODE** — varchar, enum FSDB Database Code - **TP125** — FSDB Database Code TP125; terrestrial productivity - **ENTITY** — numeric(1), range 1.0000 1.0000, number Entity Number - **CODE** — varchar, enum Scenario code - **L0F0** — Simulation scenario with no initial biological legacy and no subsequent wildfires - **L1F0** — Simulation scenario with historic initial biological legacy level (remnant trees on 12% of the landscape) and no subsequent wildfires - **L2F0** — Simulation scenario with historic initial biological legacy level (remnant trees on 24% of the landscape) and no subsequent wildfires - **L0F1** — Simulation scenario with no initial biological legacy and the historic mean fire return interval of 262 years - **L1F1** — Simulation scenario with historic initial biological legacy level (remnant trees on 12% of the landscape) and the historic mean fire return interval of 262 years - **L2F1** — Simulation scenario with historic initial biological legacy level (remnant trees on 24% of the landscape) and the historic mean fire return interval of 262 years - **L0F2** — Simulation scenario with no initial biological legacy and a reduced mean fire return interval of 131 years - **L1F2** — Simulation scenario with historic initial biological legacy level (remnant trees on 12% of the landscape) and a reduced mean fire return interval of 131 years - **L2F2** — Simulation scenario with historic initial biological legacy level (remnant trees on 24% of the landscape) and a reduced mean fire return interval of 131 years - **YEAR** — numeric(1), range 1.0000 501.0000, number Simulation year - **RUMPLE** — numeric(1), range 1.0000 3.5000, number Rumple index of canopy complexity - **TEC** — numeric(1), range 223.0000 779.0000, megagrams per hectare Total Ecosystem Carbon storage - **LSS** — numeric(1), range 0.0000 1.0000, number Share of late-seral species presence (trees >4m height) ## Attribute Definitions **CODE** Scenario code **DBCODE** FSDB Database Code **ENTITY** Entity Number **LSS** Share of late-seral species presence (trees >4m height) **RUMPLE** Rumple index of canopy complexity **TEC** Total Ecosystem Carbon storage **YEAR** Simulation year ## Enumerated Domains ### DBCODE - **TP125** — FSDB Database Code TP125; terrestrial productivity ### CODE - **L0F0** — Simulation scenario with no initial biological legacy and no subsequent wildfires - **L1F0** — Simulation scenario with historic initial biological legacy level (remnant trees on 12% of the landscape) and no subsequent wildfires - **L2F0** — Simulation scenario with historic initial biological legacy level (remnant trees on 24% of the landscape) and no subsequent wildfires - **L0F1** — Simulation scenario with no initial biological legacy and the historic mean fire return interval of 262 years - **L1F1** — Simulation scenario with historic initial biological legacy level (remnant trees on 12% of the landscape) and the historic mean fire return interval of 262 years - **L2F1** — Simulation scenario with historic initial biological legacy level (remnant trees on 24% of the landscape) and the historic mean fire return interval of 262 years - **L0F2** — Simulation scenario with no initial biological legacy and a reduced mean fire return interval of 131 years - **L1F2** — Simulation scenario with historic initial biological legacy level (remnant trees on 12% of the landscape) and a reduced mean fire return interval of 131 years - **L2F2** — Simulation scenario with historic initial biological legacy level (remnant trees on 24% of the landscape) and a reduced mean fire return interval of 131 years