哥伦比亚加勒比海地区季节性上升流条件下珊瑚藻Porolithon antillarum和Lithophyllum sp.的繁殖物候

IF 1.9 4区 生物学 Q2 MARINE & FRESHWATER BIOLOGY Aquatic Botany Pub Date : 2023-11-03 DOI:10.1016/j.aquabot.2023.103726
Félix Alvarado-Jiménez , Natalia Rincón-Díaz , Rocío García-Urueña
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引用次数: 0

摘要

甲壳珊瑚藻是一组钙化藻类,在珊瑚礁中具有重要的生态作用,如固结和稳定珊瑚礁框架,并为不同的海洋生物提供栖息地和食物。在常见属中,Lithophyllum和Porolithon (Corallinales)是哥伦比亚加勒比海Santa Marta珊瑚礁群落的显著组成部分。从12月到4月,该地区受到季节性信风的影响,这种现象与地下水上涌有关,导致温度从~ 29°C降至~ 22°C, pH从~ 8.5降至~ 8.0。本研究的目的是评估上升流和非上升流(2017年、2018年和2021年)对Lithophyllum sp.和Porolithon antillarum繁殖物物学的影响,基于每平方厘米的表面概念计数和对泰罗纳国家自然公园和蓬塔维纳多,圣玛尔塔收集的藻类的繁殖阶段的测定。水藻在上升期的成熟概念数最多,分别为46和27个概念cm2。此外,四合胞期是所有菌体中最常见的阶段,这表明该阶段在所研究的藻类的生殖周期中占主导地位。这些结果很重要,因为它们表明了季节性对CCA生殖阶段的影响,并提出了对环境对决定这些藻类生命周期变化的生理机制的影响进行更多研究的必要性。
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Reproductive phenology of coralline algae Porolithon antillarum and Lithophyllum sp. under seasonal upwelling conditions, Colombian Caribbean

Crustose coralline algae are a group of calcified algae that has an important ecological role in coral reefs, such as cementation and stabilization of the reef framework, as well as providing habitat and food for different marine associates. Among the common genera, Lithophyllum and Porolithon (Corallinales) are conspicuous components of the Santa Marta reef communities in the Colombian Caribbean. From December to April, this area is influenced by seasonal trade winds, a phenomenon that is related to the upwelling of subsurface waters that causes a decrease in temperature from ∼29 °C to ∼22 °C and pH from ∼ 8.5 to ∼8.0. The aim of this study was to evaluate the effect of upwelling and non-upwelling (2017, 2018, and 2021) on the reproductive phenology of Lithophyllum sp. and Porolithon antillarum based on counts of superficial conceptacles per cm2 and a determination of the reproductive stages of the algae collected in Tayrona National Natural Park and Punta Venado, Santa Marta. The algae presented the highest number of mature conceptacles during the upwelling period for P. antillarum and Lithophyllum sp. (46 and 27 conceptacles cm2, respectively). Moreover, the tetrasporangial stage was the most frequent in all the thalli, thus indicating the predominance of this phase in the reproductive cycle of the algae studied. These results are important as they indicate the influence of seasonality on the reproductive stages of CCA and bring the need to do more research into the influence of the environment on the physiological mechanisms that determine the changes in the life cycle of these algae.

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来源期刊
Aquatic Botany
Aquatic Botany 生物-海洋与淡水生物学
CiteScore
3.80
自引率
5.60%
发文量
70
审稿时长
6 months
期刊介绍: Aquatic Botany offers a platform for papers relevant to a broad international readership on fundamental and applied aspects of marine and freshwater macroscopic plants in a context of ecology or environmental biology. This includes molecular, biochemical and physiological aspects of macroscopic aquatic plants as well as the classification, structure, function, dynamics and ecological interactions in plant-dominated aquatic communities and ecosystems. It is an outlet for papers dealing with research on the consequences of disturbance and stressors (e.g. environmental fluctuations and climate change, pollution, grazing and pathogens), use and management of aquatic plants (plant production and decomposition, commercial harvest, plant control) and the conservation of aquatic plant communities (breeding, transplantation and restoration). Specialized publications on certain rare taxa or papers on aquatic macroscopic plants from under-represented regions in the world can also find their place, subject to editor evaluation. Studies on fungi or microalgae will remain outside the scope of Aquatic Botany.
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