基于历史数据和生物地理学确定恢复异木麻黄(Allocasuarina robusta)的未来优先事项

识别某一物种受威胁的原因有助于制定最好的物种恢复计划,基于一般概念的恢复计划可能并不适用于某个特定区域或者某个特定物种的恢复。城市扩张和土地集约化利用就被认为是威胁区域生物多样性的主要人为因素,因此厘清这个威胁过程与受威胁物种的相互作用可以指导物种的恢复工作。在南澳大利亚州,异木麻黄(Allocasuarina robusta)的变化过程为了解该地区过去的土地利用变化及其对生物多样性的影响提供了很好的机会。本文聚焦于土地利用变化与植物标本数据之间的关系,以了解常见物种和受威胁物种之间的关系。随着物种的进化和对环境的适应,所采取的生物多样性恢复保护措施(包括用于识别未来行动的方法)需要与不断变化的环境相适应。同时,不断变化的环境也会对生物多样性产生影响,并进而给土地管理者带来了许多新的问题。传统的物种恢复技术可以减缓威胁过程,例如补充种植就是有充分依据的做法,但是这种做法的意义可能还有待于进一步验证;自然再生对于种群长期生存至关重要,但是在生命力旺盛的异木麻黄中却并没有发生(自然再生情况)。调查异木麻黄的变化情况旨在探索植物标本数据与土地历史利用之间的关系,以指导未来的物种恢复工作。

A Case Study of Allocasuarina robusta Recovery Using History and Biogeography to Identify Future Priorities

Identifying the cause of a threatened species can aid in how best to formulate recovery actions. Recovery can be based on broad concepts and may not reflect a specific community or species requirements. Urban sprawl and intensification of land are known as threatening processes. How a threatening process interacts with a threatened species can aid in the recovery efforts. In South Australia, the species Allocasuarina robusta provides an opportunity to understand how past land usage may direct recovery efforts. Information on past land usage can involve identifying and using data from multiple repositories. The investigation focused on the relationship between changes in land use and herbarium data to understand a relationship between a common and threatened species. As a species evolves and adapts, the conservation practices used, including the methods used for identifying future actions, needs to be reflective of a changing environment. A changing environment can have consequences to biodiversity, creating several issues for a land manager. Traditional species recovery techniques can slow the threatening process down. Sometimes these threats may be visible like grazing from fauna(native and introduced). The threat to Allocasuarina robusta is a change in land use originating from anthropogenic activities. Supplementary planting with tube stock is a well-grounded practice, but the implications from this practice may need further investigation. Natural regeneration is crucial for long term population survival, but in Allocasuarina robusta, this is not occurring. The Allocasuarina robusta investigation aims to explore the relationships between herbarium data and land-use histories to guide future recovery efforts.