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首页> 外文期刊>Oryx >Identifying essential ecological factors underpinning the development of a conservation plan for the Endangered Australian tree Alectryon ramiflorus
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Identifying essential ecological factors underpinning the development of a conservation plan for the Endangered Australian tree Alectryon ramiflorus

机译：确定必要的生态因素，为制定澳大利亚濒危树种Alectryon ramiflorus保护计划提供支持

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摘要

Reintroduction of rare and threatened species often fails to yield quantifiable conservation benefits because insufficient attention is focused on the species' habitat requirements and biology. We demonstrate the value of such data in informing a recovery plan for Alectryon ramiflorus S.Reyn. (Sapindaceae), a tree species endemic to a region on the southern coast of Queensland, Australia. When the species was categorized as Endangered on the IUCN Red List in 1997 the total known population consisted of only 26 adult plants, in five disjunct populations in remnant patches of native vegetation. Analysis of vegetation type, soil chemistry and composition data comparing remnant patches with and without A. ramiflorus revealed that the species is not restricted to a specific soil type but prefers sites with relatively fertile soil and a more complex vegetation structure. The species is cryptically dioecious, displays asynchronous flowering between individuals, and requires insect-vectored pollination. The low rate of seedling production recorded within individual patches was attributed to the scarcity of trees of both genders, asynchronous flowering of individual trees and, in smaller patches, a sparse population of pollinating insect species. Successful reintroduction of A. ramiflorus will require consideration of these aspects of demographic success. The findings highlight the importance to species recovery plans of the knowledge of habitat requirements, interspecific relationships and critical dependencies, as well as species reproductive biology.
机译：重新引入稀有和受威胁物种常常无法产生可量化的保护效益，因为人们对这种物种的栖息地要求和生物学关注不足。我们证明了此类数据的价值，可用于为勒芒电蝇恢复计划提供信息。 （Sapindaceae），一种特有的树种，位于澳大利亚昆士兰州南部海岸。当该物种在1997年被列为《世界自然保护联盟红色名录》中的濒危物种时，已知的总种群仅由26种成年植物组成，在五个离散种群中残留有原生植被。通过对植被类型，土壤化学和成分数据进行分析，比较有无沙眼曲霉的残留斑块，发现该物种不限于特定的土壤类型，而是喜欢土壤相对肥沃，植被结构更复杂的地点。该物种神秘地雌雄异株，在个体之间显示出异步开花，并且需要昆虫媒介传粉。单个斑块中记录的幼苗产量低归因于两种性别的树木稀少，单个树的异步开花，以及在较小的斑块中，授粉昆虫种类稀少。成功引入拉米曲霉将需要考虑人口统计学方面的这些方面。这些发现凸显了生境要求，种间关系和关键依存关系以及物种生殖生物学知识对物种恢复计划的重要性。

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