Surrounded by Amazonian forest on an iron Island: Mapping the distribution and variation in population abundance of two threatened narrow-range endemic species

IF 2.5 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Journal for Nature Conservation Pub Date : 2025-08-06 DOI:10.1016/j.jnc.2025.127046

Fábia Cavalcante Pinho , Lucas Erickson Nascimento da Costa , Carolina da Silva Carvalho , André Luiz de Rezende Cardoso , Denison Henrique Lima de Miranda , Markus Gastauer , Mauricio Takashi Coutinho Watanabe

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引用次数: 0

Abstract

Information on abundance and distribution patterns is crucial for effective species conservation planning. Here we provide information on the distribution range and abundance of Parapiqueria cavalcantei and Carajasia cangae, which are endemic to the Amazonian ironstone outcrops of Serra dos Carajás, Brazil. Extensive surveys for both species were conducted based on previous records and by active searching, covering all the known distribution of the target species along the Serra dos Carajás. Abundance were acquired from 492 plots of 1 m², and information on vegetation type was obtained from land cover maps. We reported new records of P. cavalcantei and C. cangae, which has increased the area of occupancy of the species. With the new records, we estimated an area of occupancy of 40 km² to P. cavalcantei and 60 km² to C. cangae. Both species presented some vegetation specificity: P. cavalcantei was more frequently recorded at low woodlands, while C. cangae was more abundant in areas of rocky grasslands. Hotspots of abundance for both species were evidenced along the range of distribution. Altogether, this information will support the development of mitigation plans focused on the conservation of these narrow-range endemic species.

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在铁岛上被亚马逊森林包围：绘制两种受威胁的狭窄范围特有物种的分布和种群丰度变化

关于丰度和分布格局的信息对于有效的物种保护规划至关重要。本文介绍了巴西塞拉多斯Carajás亚马逊地区铁石露头特有的Parapiqueria cavalcantei和Carajasia canae的分布范围和丰度。根据以前的记录和积极的搜索，对这两个物种进行了广泛的调查，覆盖了塞拉多斯Carajás沿线所有已知的目标物种分布。从492个样地（1 m2）获取丰度，从土地覆被图获取植被类型信息。我们报道了新记录的P. cavalcantei和C. cangae，增加了该物种的占用面积。在新记录的基础上，我们估计卡瓦尔坎泰蒿的占用面积为40 km2，卡瓦尔坎加蒿的占用面积为60 km2。两种植物均表现出一定的植被特异性：P. cavalcantei多见于低林地，C. canae多见于石质草原。在分布范围内，这两个物种都有丰富的热点。总之，这些信息将有助于制定以保护这些范围狭窄的特有物种为重点的缓解计划。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal for Nature Conservation 环境科学-生态学

CiteScore

3.70

自引率

5.00%

发文量

151

审稿时长

7.9 weeks

期刊介绍： The Journal for Nature Conservation addresses concepts, methods and techniques for nature conservation. This international and interdisciplinary journal encourages collaboration between scientists and practitioners, including the integration of biodiversity issues with social and economic concepts. Therefore, conceptual, technical and methodological papers, as well as reviews, research papers, and short communications are welcomed from a wide range of disciplines, including theoretical ecology, landscape ecology, restoration ecology, ecological modelling, and others, provided that there is a clear connection and immediate relevance to nature conservation. Manuscripts without any immediate conservation context, such as inventories, distribution modelling, genetic studies, animal behaviour, plant physiology, will not be considered for this journal; though such data may be useful for conservationists and managers in the future, this is outside of the current scope of the journal.