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Australian Journal of Botany Australian Journal of Botany Society
Southern hemisphere botanical ecosystems
RESEARCH ARTICLE

Evaluation of biodiversity and conservation status of endemic and rare plant species of an endemism hotspot in Iran

Leila Malekpourzadeh https://orcid.org/0000-0002-2374-9255 A * , Farrokh Ghahremaninejad https://orcid.org/0000-0001-5860-9976 B , Seyed Mansour Mirtadzadini C and Arman Shokooh Saljooghi https://orcid.org/0009-0006-4556-1014 D
+ Author Affiliations
- Author Affiliations

A Department of Ecology, Graduate University of Advanced Technology, Kerman, Iran.

B Department of Plant Sciences, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran.

C Department of Biology, Faculty of Sciences, Shahid Bahonar University, Kerman, Iran.

D Department of Chemistry, Faculty of Sciences, Shahid Bahonar University, Kerman, Iran.

* Correspondence to: malekpour.leila@yahoo.com

Handling Editor: Steve Sinclair

Australian Journal of Botany 73, BT24045 https://doi.org/10.1071/BT24045
Submitted: 23 July 2024  Accepted: 14 September 2025  Published: 2 October 2025

© 2025 The Author(s) (or their employer(s)). Published by CSIRO Publishing

Abstract

Context

This study focuses on the Lalehzar and Hezar Mountains within the Yazd-Kerman Endemism Hotspot in Iran, part of the Irano-Turanian region, which includes five of the world’s 34 endemism hotspots.

Aims

The study aims to assess the conservation status and categorize endemic and rare plants in the area by using modified IUCN 2019 criteria.

Methods

Over 3 years (2017–2019), we conducted an extensive study of the floristic composition and plant diversity. We developed a localized ranking system (L-Rank) based on IUCN Criterion B (area of occupancy, AOO) for small-scale habitats (<2000 km2). By using 1 × 1 km grid cells and field surveys, we mapped species distributions. GIS analysis and statistical validation were employed to quantify AOO, including subcriteria such as the number of locations and extent of decline, and the L-Rank system classified species by their distribution range. The criteria were aligned with the corresponding IUCN 2019 categories.

Key results

In total, 306 plant species were identified, covering 195 genera and 49 families. Of these, 64 species were classified as threatened, including 15 Critically Endangered (CR), 16 Endangered (EN), and 33 Vulnerable (VU).

Conclusions

Findings highlighted the urgent conservation needs of species with restricted ranges (e.g. L1-ranked taxa) facing elevated extinction risks because of habitat fragmentation and climate change.

Implications

This approach connects global (IUCN) and local conservation frameworks, providing actionable insights for botanists, land managers, and policymakers to prioritize protection efforts in vulnerable ecosystems.

Keywords: botanical survey, conservation biology, ecological assessment, ecosystem health, endemism centres, floristic survey, habitat preservation, Irano-Turanian region, native vegetation, plant diversity, species diversity, threatened flora, threatened species.

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