> For the complete documentation index, see [llms.txt](https://isbm.savimbo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://isbm.savimbo.com/methodology/zh-cn/ji-suan.md).

# 计算

该方法学的核心如下。我们建立了一种可替代、可追溯且可进行文化转译的受保护生物多样性计量指标，并且该指标与其他生物多样性指标和方法学具有互操作性。

在 ISBM 下，一个 VBC 代表 1 公顷受保护生态系统 30 天，其价值对应于基线 [生态系统价值](/methodology/zh-cn/ji-xian-ping-gu/ji-xian-sheng-tai-xi-tong-fen-lei.md) （归一化至 [四个等级](/methodology/zh-cn/ji-suan/jia-zhi-ji-suan.md)）。生态系统的保护由具备资格的 [指示物种](/methodology/zh-cn/ji-xian-ping-gu/zhi-shi-wu-zhong-xuan-ze.md) 及其 [完整性评分](/methodology/zh-cn/ji-suan/wan-zheng-xing-ji-suan.md)决定。如其值低于 1.0，可能导致部分计入信用。 

以下为一个示范地块，展示为期 1 年的数据及本方法学的交互式视图。下文将说明达到该视图所需的顺序步骤。 

#### 图 7。随着不同物种观测结果的变化，生物多样性信用随时间出现和消失。

<figure><img src="/files/02d2ad2e399ba3f1cd46eb8c2a3f6c880ce5f31f" alt=""><figcaption></figcaption></figure>

需要指出的是，理论上计算较为简明，但实际执行相对复杂。该复杂性已转由 [开源计算机代码](/methodology/zh-cn/fu-lu/fu-lugkai-yuan-dai-ma-he-ji-suan-yang-ben.md) 承担，以简化项目层面所需的观测点设置。&#x20;

本文阐释该计算机代码的理论与逻辑，但建议 BCPs 使用经审核来源提供的自动化计算。&#x20;

不过，所有计算均可轻松实现自动化，相应的开源代码可见于 [附录 G](/methodology/zh-cn/fu-lu/fu-lugkai-yuan-dai-ma-he-ji-suan-yang-ben.md) ，而手工计算示范载于 [附录 M](/methodology/zh-cn/fu-lu/fu-lumru-he-shou-gong-ji-suan-sheng-wu-duo-yang-xing-xin-yong.md). &#x20;

这些计算旨在避免在一种不识别单个物种的简化方法学下发生重复计入。任何特定土地公顷在任一时点只能计一次，且其价值不得超过 1.0；若该地发现的指示物种不符合条件，则亦不会获得全额计入。&#x20;


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