Abstract

Coastal habitats with Juniperus sp. pl. represent the mature stage in the ecological succession of dune ecosystems. Maritime junipers (Juniperus macrocarpa), prickly junipers (J. navicularis) and caudate junipers (J. turbinata subsp. turbinata) are dominant in the Iberian Peninsula and Balearic Islands communities. This study analyses the biogeographical distribution of 12 habitats, the biotopes they occupy (stabilised sands, coastal cliffs), their biological value, natural and anthropogenic threats and the risk category, according to the IUCN scale, which varies from vulnerable habitats to those in danger of extinction. Half the studied habitats are classified as vulnerable and others endangered. The latter corresponds to small populations located in southeast and east Spain and on the Balearic Islands. Isolation, together with poor seed viability and several anthropic factors, contribute to these communities’ vulnerability.

摘要

杜松属的沿海栖息地。pl。代表沙丘生态系统生态演替的成熟阶段。海洋杜松 ( Juniperus macrocarpa )、刺杜松 ( J. navicularis ) 和尾状杜松 ( J. turbinata subsp. turbinata) 在伊比利亚半岛和巴利阿里群岛社区占主导地位。本研究分析了 12 个栖息地的生物地理分布、它们占据的生物群落（稳定的沙地、海岸悬崖）、它们的生物学价值、自然和人为威胁以及风险类别，根据 IUCN 规模，从脆弱的栖息地到处于危险的栖息地不等的灭绝。一半的研究栖息地被归类为脆弱和其他濒临灭绝。后者对应于位于西班牙东南部和东部以及巴利阿里群岛的小种群。隔离，加上种子活力差和一些人为因素，导致这些社区的脆弱性。