Scholarlink

Echinoderms are typically the most abundant and diverse members of the benthic communities. Within this Phylum, asteroids are especially diverse and abundant in Antarctic and Subantarctic waters, as well as in the South Atlantic Ocean, accounting for approximately 12% of total species richness in these regions. Asteroids play key ecological roles and occupy various trophic levels within food webs, including that of top predators. The developmental patterns are highly diverse, ranging from planktotrophic pelagic larvae to lecithotrophic larvae, retained larvae through brooding, and even direct development without a larval stage. Studying these patterns provides valuable insights into species dispersal and connectivity across geographic regions, as developmental modes are associated with differences in larval duration in the water column, which directly influences dispersal potential and population connectivity. In recent years, the number of marine and oceanographic studies funded by Argentine public institutions has increased; however, many areas of the South Atlantic remain poorly studied. The geographical isolation of Isla de los Estados (54° 16′ S, 64° 17′ W), separated from the main island of Tierra del Fuego by the Le Maire Strait, along with its adverse sea conditions, has historically limited scientific exploration in the region. As a result, our understanding of this remote region and its marine fauna remains limited. This chapter presents the diversity of asteroid species found in the waters surrounding Isla de los Estados, based on data collected during oceanographic surveys and a comprehensive literature review. It also compares the northern and southern zones of the island in terms of species composition and developmental patterns. Continued research in this region is essential to deepen our understanding of high-latitude ecosystems and their connectivity, ultimately contributing to the development of effective conservation strategies and the protection of these species and the marine ecosystems they inhabit.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Biodiversity and Development Patterns of Asteroids from Isla de los Estados and Surrounding Areas

  • 章节

  • 发表日期：

    2026年

查看全文
  • Cintia P. Fraysse,
  • Analia F. Pérez

摘要

Echinoderms are typically the most abundant and diverse members of the benthic communities. Within this Phylum, asteroids are especially diverse and abundant in Antarctic and Subantarctic waters, as well as in the South Atlantic Ocean, accounting for approximately 12% of total species richness in these regions. Asteroids play key ecological roles and occupy various trophic levels within food webs, including that of top predators. The developmental patterns are highly diverse, ranging from planktotrophic pelagic larvae to lecithotrophic larvae, retained larvae through brooding, and even direct development without a larval stage. Studying these patterns provides valuable insights into species dispersal and connectivity across geographic regions, as developmental modes are associated with differences in larval duration in the water column, which directly influences dispersal potential and population connectivity. In recent years, the number of marine and oceanographic studies funded by Argentine public institutions has increased; however, many areas of the South Atlantic remain poorly studied. The geographical isolation of Isla de los Estados (54° 16′ S, 64° 17′ W), separated from the main island of Tierra del Fuego by the Le Maire Strait, along with its adverse sea conditions, has historically limited scientific exploration in the region. As a result, our understanding of this remote region and its marine fauna remains limited. This chapter presents the diversity of asteroid species found in the waters surrounding Isla de los Estados, based on data collected during oceanographic surveys and a comprehensive literature review. It also compares the northern and southern zones of the island in terms of species composition and developmental patterns. Continued research in this region is essential to deepen our understanding of high-latitude ecosystems and their connectivity, ultimately contributing to the development of effective conservation strategies and the protection of these species and the marine ecosystems they inhabit.