Scholarlink

<p>Dormant stages of zooplankton act as biodiversity reservoirs and are essential for community re-establishment, yet their dynamics in subterranean ecosystems remain poorly understood. These habitats are resource and light limited, creating challenging conditions for zooplankton survival. We tested two hypotheses: (1) Hatching abundance and taxon richness would be higher under a 12/12&#xa0;h light–dark photoperiod and in dry sediments, as light is a key cue for zooplankton hatching and dry sediments simulate natural desiccation conditions, and (2) dormant stages would exhibit greater alpha and beta diversity than active communities, as they preserve a broader array of taxa. We sampled active zooplankton in ten subterranean sites and incubated dry and wet sediments for 189&#xa0;days under four treatments: constant darkness (dark dry, dark wet) and a 12/12&#xa0;h light–dark photoperiod (12/12 dry, 12/12 wet). Our results indicated that light exposure promoted hatching abundance and richness, whereas sediment desiccation had a more modulatory effect in dark conditions only. Contrary to expectations, the active community exhibited higher alpha and beta diversity. Because light is largely absent in subterranean habitats and sediments can remain desiccated for prolonged periods during Caatinga droughts, dormant stages likely function less as immediate colonizers and more as long-term biodiversity reservoirs.</p>

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

Hatching triggers and diversity patterns of zooplankton dormant stages in groundwater ecosystems of the Caatinga drylands

  • 期刊论文

  • 发表日期：

    2026年3月5日

查看全文
  • Carolina Teixeira Puppin-Gonçalves,
  • Ana Karolina dos Santos-Silva,
  • Amanda Maia da Silva,
  • Camila Estefany Alves Mota,
  • Danielle Katharine Petsch,
  • Diego de Medeiros Bento,
  • Claudia Costa Bonecker,
  • Eneida Maria Eskinazi-Sant’Anna,
  • Juliana Deo Dias

摘要

Dormant stages of zooplankton act as biodiversity reservoirs and are essential for community re-establishment, yet their dynamics in subterranean ecosystems remain poorly understood. These habitats are resource and light limited, creating challenging conditions for zooplankton survival. We tested two hypotheses: (1) Hatching abundance and taxon richness would be higher under a 12/12 h light–dark photoperiod and in dry sediments, as light is a key cue for zooplankton hatching and dry sediments simulate natural desiccation conditions, and (2) dormant stages would exhibit greater alpha and beta diversity than active communities, as they preserve a broader array of taxa. We sampled active zooplankton in ten subterranean sites and incubated dry and wet sediments for 189 days under four treatments: constant darkness (dark dry, dark wet) and a 12/12 h light–dark photoperiod (12/12 dry, 12/12 wet). Our results indicated that light exposure promoted hatching abundance and richness, whereas sediment desiccation had a more modulatory effect in dark conditions only. Contrary to expectations, the active community exhibited higher alpha and beta diversity. Because light is largely absent in subterranean habitats and sediments can remain desiccated for prolonged periods during Caatinga droughts, dormant stages likely function less as immediate colonizers and more as long-term biodiversity reservoirs.