Simulation Model of Benthic Antarctic Assemblages (SIMBAA), link to PC-executable

SIMBAA is a spatially explicit, individual-based simulation model. It was developed to analyse the response of populations of Antarctic benthic species and their diversity to iceberg scouring. This disturbance is causing a high local mortality providing potential space for new colonisation. Traits can be attributed to model species, e.g. in terms of reproduction, dispersal, and life span. Physical disturbances can be designed in space and time, e.g. in terms of size, shape, and frequency. Environmental heterogeneity can be considered by cell-specific capacities to host a certain number of individuals. When grid cells become empty (after a disturbance event or due to natural mortality of of an individual), a lottery decides which individual from which species stored in a pool of candidates (for this cell) will recruit in that cell. After a defined period the individuals become mature and their offspring are dispersed and stored in the pool of candidates. The biological parameters and disturbance regimes decide on how long an individual lives. Temporal development of single populations of species as well as Shannon diversity are depicted in the main window graphically and primary values are listed. Examples for simulations can be loaded and saved as sgf-files. The results are also shown in an additional window in a dimensionless area with 50 x 50 cells, which contain single individuals depicted as circles; their colour indicates the assignment to the self-designed model species and the size represents their age. Dominant species per cell and disturbed areas can also be depicted. Output of simulation runs can be saved as images, which can be assembled to video-clips by standard computer programs (see GIF-examples of which \"Demo 1\" represents the response of the Antarctic benthos to iceberg scouring and \"Demo 2\" represents a simulation of a deep-sea benthic habitat).

SIMBAA是一款空间显式的基于个体的模拟模型（spatially explicit, individual-based simulation model）。该模型专为分析南极底栖物种种群及其多样性对冰山刮擦扰动的响应而开发。此类扰动会造成较高的局部个体死亡率，为新物种的定植提供潜在生存空间。研究人员可为模型物种赋予各类功能性状，例如繁殖、扩散及寿命相关的特征。物理扰动可在空间与时间维度上进行自定义设计，包括扰动的规模、形态与发生频率。环境异质性可通过单元格的专属承载容量加以体现，即每个网格单元格可容纳的个体数量上限。当网格单元格因扰动事件或个体自然死亡而出现空置时，系统将通过抽签定植机制，从该单元格的候选个体池中选取来自某一物种的个体，完成该单元格的种群补充。经过一段预设时长后，个体将发育成熟，其后代会被扩散并储存至对应单元格的候选个体池中。生物参数与扰动模式共同决定了个体的寿命长度。主窗口会以图形形式展示物种种群的时间动态以及香农多样性(Shannon diversity)，同时列出原始计算数值。模拟示例可被加载并保存为sgf格式文件。模拟结果还会在额外窗口中的50×50单元格无量纲区域内展示：单个个体以圆形符号表示，颜色代表其所属的自定义模型物种，尺寸则对应其年龄。每个单元格的优势物种以及受扰动区域同样支持可视化展示。模拟运行的输出结果可保存为图像文件，后续可通过标准计算机程序将这些图像拼接为视频片段。示例GIF文件中，"Demo 1"展示了南极底栖生物对冰山刮擦扰动的响应，"Demo 2"则模拟了深海底栖生境的动态变化。