Dinoflagellate cyst assemblages in recent sediments of Iran's tropical mangrove forests

IF 1.5 4区地球科学 Q2 PALEONTOLOGY

Marine Micropaleontology Pub Date : 2025-02-08 DOI:10.1016/j.marmicro.2025.102449

Gilan Attaran-Fariman , Sima Abir , Faezeh Dolatabadi , Ehsan Abedi , Fatemeh Sayareh

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Abstract

We investigated the distribution and composition of dinoflagellate cysts, including potential harmful algal bloom (HAB) species, in Iranian mangroves bordering the Persian Gulf and Oman Sea. Sediment samples were collected from 62 stations across 10 locations in three provinces (Bushehr, Hormozgan, Sistan & Baluchestan) in autumn 2020. Analysis of dinoflagellate cysts revealed a diverse assemblage encompassing 56 species, including 10 known to be triggers of harmful algal blooms (HABs). Genus Protoperidinium was dominant, exhibiting a 21.4 % abundance and comprising 14 species across 60 sampling stations. In contrast, genus Margalefidinium was present in 34 stations with only a single species. Margalefidinium polykrikoides was the key species of dissimilarity between provinces, driving distinct compositions in all pairwise comparisons. Scrippsiella acuminata was a significant contributor to the dissimilarity observed between the Bu and S&B, as well as the Ho and S&B assemblages. DistLM, dbRDA, and marginal tests confirmed that environmental parameters significantly (P > 0.05) influenced cyst composition across the provinces. Regular monitoring of environmental parameters alongside analyses of dinoflagellate cyst assemblages is a potential use for predicting HABs and also provide valuable insights into the well-being of essential mangrove ecosystems.

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伊朗热带红树林近期沉积物中的鞭毛藻囊组合

我们调查了波斯湾和阿曼海沿岸伊朗红树林中鞭毛藻包囊的分布和组成，包括潜在的有害藻华（HAB）物种。沉积物样本从3个省（布什尔、霍尔木兹甘、锡斯坦和安布尔）10个地点的62个站点收集；俾路支斯坦（Baluchestan）。对鞭毛藻囊的分析揭示了56种不同的组合，其中包括10种已知的有害藻华（HABs）的触发器。以Protoperidinium属为优势种，丰度为21.4%，共有14种，分布在60个采样点。相比之下，Margalefidinium属在34个站点中只存在一个物种。在两两比较中，Margalefidinium polykrikoides是省际间差异的关键种，其组成差异显著。尖锐Scrippsiella acuminata是造成Bu和S&；B以及Ho和S&；B组合差异的重要原因。DistLM、dbRDA和边际试验证实，环境参数显著(P >；0.05)影响各省的囊肿成分。定期监测环境参数，同时分析鞭毛藻囊群，是预测有害藻华的潜在用途，也为了解基本红树林生态系统的健康状况提供了有价值的见解。

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来源期刊

Marine Micropaleontology 地学-古生物学

CiteScore

3.70

自引率

15.80%

发文量

审稿时长

26.7 weeks

期刊介绍： Marine Micropaleontology is an international journal publishing original, innovative and significant scientific papers in all fields related to marine microfossils, including ecology and paleoecology, biology and paleobiology, paleoceanography and paleoclimatology, environmental monitoring, taphonomy, evolution and molecular phylogeny. The journal strongly encourages the publication of articles in which marine microfossils and/or their chemical composition are used to solve fundamental geological, environmental and biological problems. However, it does not publish purely stratigraphic or taxonomic papers. In Marine Micropaleontology, a special section is dedicated to short papers on new methods and protocols using marine microfossils. We solicit special issues on hot topics in marine micropaleontology and review articles on timely subjects.