Here are a few options for a WordPress post tag description, along with explanations, focusing on clarity and relevance in Traditional Chinese:

**Option 1 (Concise & Direct):**

> 描述：指非原生於本地，卻引入或自然擴散到此地的生物物種。涵蓋入侵物種、有害生物等，對生態系統可能造成影響。
>
> *Translation:* Describes biological species not native to this area, but introduced or spread naturally here. Includes invasive species, harmful organisms, etc., which can potentially affect the ecosystem.

* **Why it’s good:**
* Clear and concise explanation of the term.
* Highlights potential ecological impact.
* Uses common vocabulary.

**Option 2 (Slightly More Detailed):**

> 描述：泛指從其他地區或國家引入、移入，或在其原生地意外擴散到本地的動植物或其他生物。有些外來種能成功繁殖並形成穩定的族群，可能對本地生態系統、農業、甚至人類健康造成負面影響。
>
> *Translation:* Refers generally to flora, fauna, or other organisms introduced, moved in, or that spread accidentally from their original habitat to this area. Some invasive species can reproduce successfully and form stable populations, which may have a negative impact on the local ecosystem, agriculture, and even human health.

* **Why it’s good:**
* Expands on the concept.
* Emphasizes impact on the ecosystem, agriculture, and potentially human health.
* Uses slightly more formal language.

**Option 3 (Focus on Threats):**

> 描述：涵蓋所有非本地原生生物，指由外地引進或擴散到本地的動植物。這些外來種常常對本地物種構成威脅，例如：競爭、掠食、傳播疾病，進而破壞生態平衡，造成生物多樣性流失。
>
> *Translation:* Includes all non-native organisms, referring to flora and fauna introduced or spread to this area from elsewhere. These invasive species often pose a threat to local species, for example: competition, predation, and the spread of disease, consequently disrupting the ecological balance and leading to a loss of biodiversity.

* **Why it’s good:**
* Emphasizes the threats posed by invasive species.
* Specifically mentions competition, predation, and disease spread.
* Highlights the consequences for the ecosystem and biodiversity.

**How to choose the best option:**

Consider the context of your blog:

* **For a general audience,** Option 1 or 2 are good choices – easy to understand.
* **If your blog focuses on ecological issues,** Option 3 would be suitable emphasizing the challenges caused by invasive species.

**How to input the description in WordPress:**

1. **Go to the specific post tag’s editing screen.**
2. **Look for a field titled “Description” or “Tag Description”.** It might be located within the “Tags” section or as a separate box.
3. **Paste your chosen description into the field.**
4. **Update/Save the tag.**

Remember to be consistent with your tone and language across all your tag descriptions. Good luck!